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1. Sensor output thermistor AC sensor Note the connection is ground and should be connected to the cable screen if any 38 5 8 Wiring up a pulse count channel Pulse count channels may be wired for a voltage input or a voltage free contact see section 4 9 3 for details of voltages and mechanical contact conditions The positive connection should be made to the dinput and the negative to the 6dinput For a voltage free contact input e g relay the contact Glebounce circuit must be connected This involves linking the pin to the Gdpin sensor output volt free contac S S Note the Gdconnection is ground and should be connected to the cable screen if any 5 8 1 When 2 pulse channels are fitted the connector is a 4 way sensor output panD x 5S X the additional channel input and is a function of the logger type It is configured for 200 Hz max frequency input and has debounce voltage free contacts fitted internally 39 5 9 Wiring up event channels Any or all of the eight event inputs on the Gignal connector 15 way male D may be connected via a contact or signal source to one of the common ground pins as indicated in the following diagram common ground AM 13 or 9 87654321 individual event inputs If any of the connected event channels change state then this will constitute an event The above diagram shows all events being monitored using contact closures but events
2. cccccsssssseeeeeeeeeeeeesseeee 48 8 1 Logger functions cece ee eeeteteeeeeeeeeteeetaeeeeeeeeenteee 48 8 2 Selecting ranges cccccceeecceeeceeeeeeeeeeeeeeecteeeeeeeeeeteee 48 8 3 Making connections to the datalogger eeee 49 Squirrels with pH channels ccccccccccecceeceeeeeeeeeeeeeeeeees 50 9 1 Channel Selection cccecceeeeeeeeeeeeeecceeeeeeeeeeteee 50 9 2 Pre setting the Temperature 50 9 3 Choosing the Calibration Point cccccccccceeeeeeeeeees 51 9 4 Calibrating the Midpoint OH7 0 n se 51 9 5 Calibrating the Slope eeecceeeeeeeeeeeeeeectteeeeeeeeeteee 52 9 6 Current Consumption and Battery Life ee 52 9 7 Care and Use of pH Probes sses 53 Special Instructions sess sche ec sc oe be ccec be Nc oeeesceccebeecoeesvescecesveesteteees 54 POPS SENIN AKE ATEETAN stents 54 10 2 Wind Speed amp Direction eseeeeeeeseeeeeeeeesereereresesenns 55 Fast Logging 1000 series only ccccccssssssseeeceeeeeeeeeseeeee 57 11 1 Logging Interval ssesseeeseeeeeeeeessserrrrrsssssnnrnnnsssssenns 57 11 2 Translation with Darca eeeessesesseeeesesessrrerrnrssssssees 57 aae A BETT KETIA E A E E 58 Safety and operating conditions ssssssssssssesesnnnnnnnnnrennnnnn 59 12 1 Operator safety eisni teten cece eeeeeceeeeeeeeeetesettaaeeeeees 59 12 2 Squirrel safety cece ee eeeeceeeeeeeeeeeeeesaaeeeeeees 59 12 3 Errors caused by ground connecti
3. 5 000 The EU range can only be set up using then Darca software application Whenever a voltage current channel has not been set up the initial range is always the default EU range and is displayed as follows CH 6 EU Some loggers are fitted with current only or voltage only inputs In these cases only the appropriate ranges are available in the CHANNEL SETUP function 4 9 3 Pulse count channel All models have at least one pulse count channel except 451 851 loggers Typical applications are outputs from tipping bucket rain gauges optical meter readers etc Any sensor offering the following outputs can be monitored a Voltage of between 4 and 6V at a pulse width of one microsecond and a frequency of less than 2 kHz b Voltage free contact with a minimum contact time of five milliseconds at a maximum frequency of 100 Hz Pulses are counted throughout the logging interval and the accumulated total is stored at the end of this period The count is set to zero for the beginning of the next logging interval The following ranges are available for pulse count channels CH 9 pulse 0 65000 CH 9 kpulse 0 00 650 00 29 An additional range called the EU Engineering Unit range can be set up using the Darca software application This allows the user to specify engineering units and a max min scale e g 0 1300 mm rain corresponding to either of the pulse ranges All data in this channel will in this example be
4. on which you require an alarm condition press select until the required channel is displayed Then press and hold set to enter the edit mode LOW ALARM ch 1 HOLD TO CHANGE A lower alarm threshold will appear for editing The value used will be the value that was last used by this channel before it was unset If there has never been an alarm set on this channel or if the previous value is not valid for the current range then the bottom of the current range will be substituted Use the select button to move the cursor and the set button to change the value LOW ALARM ch 1 30 0 C To remove the alarm setting enter an illegal value Any setting that the Squirrel can make no sense of will cause the lower alarm threshold to become inactive e g two minuses LOW ALARM ch 1 0 0 C 54 When editing is complete press the function button to leave the edit mode The setting will be validated and redisplayed To re edit press and hold the set button again To move onto the next channel press select The alarm appears on pin 10 of the Gignal connector High Alarm Operation of this function is identical to the Low Alarm function described above Eltek Timed This type of alarm includes high and low start values along with a delay which can be enabled The delay is common to both the high and low level and must be a multiple of the sample interval If the alarm delay is 0 then no alarm delay is used and the alarm will t
5. DO NOT APPLY LARGER VOLTAGES OR THE SQUIRREL COULD BE DAMAGED unless the logger has been specifically designed to do so 12 3 Errors caused by ground connections For voltage and current inputs only While a reading is being taken both input terminals are connected through a 1MQ resistor network to the datalogger ground At all other times both terminals are floating Datalogger ground may become connected to mains earth ground e g via a mains connected computer or an earthed power supply If this happens measuring errors will be caused if either input terminal is at a voltage of more than 15V with respect to datalogger ground All other inputs and outputs have one terminal permanently connected to the datalogger ground 12 4 Operating conditions The datalogger can be used at temperatures between 30 and 65 C and with relative humidity up to 95 non condensing At ambient temperatures below 5 C the display becomes progressively slower to change and may fade at temperatures below 30 C However this will not affect any other functions of the datalogger readings will be retained in the memory and logging will continue If a datalogger is used in a low ambient temperature internal 59 condensation can occur if it is brought into a warmer environment The datalogger should be placed in a sealed container a plastic bag provides a cost effective solution The container should remain sealed until the datalogger has warmed u
6. If you have set the start time and date to earlier than the current real time then the following message is displayed START 00 05 ta P55 immediate s t r Logging will then commence as soon as you set the logger to start logging At this time the start time will automatically be adjusted to the current real time The start time and date cannot be altered if logging is in progress or if the logger is waiting to start logging this will be indicated by the following message when set is pressed START 00 05 55 LOGGING 18 Please note that invalid settings are treated as for time and date 4 6 The INT function logging sampling interval Depending upon the logging mode selected see 4 8 readings may be stored in memory at fixed intervals or when certain events occur or a combination of both of these In the INT function the logging interval is shown on the top line and can be set between 1 second and 24 hours unless dast logging modedis used see section 11 In logging modes that include averaging the inputs are measured at a shorter interval called the sample interval and the average of these measurements is recorded at the logging interval The sample interval is shown on the bottom line and can be set between 1 second and 12 hours provided that a logging mode including averaging is selected MODE log average MODE log eventtaverage If you have already selected either of the above modes but have not selected a
7. METER function This displays the value of the selected channel using the currently selected range for that channel As soon as you enter the METER function the display will show the value of the first channel selected and these values will be updated every second This example assumes you have selected the following channels Channel 3 30 0 70 0 C Channel 5 0 000 1 000 V Channel 7 0 0 5 0V 0 500 Lux As soon as you enter the METER function the display will show METER ch 3 37 5 C You may view the other channels by pressing select to scroll through those that have been selected METER ch 5 0 340 METER a 7 52 4 2 1 Pulse count channels When viewing a pulse count channel in METER mode the display will show an accumulating total of pulse counts This total may be reset to zero by pressing set Please note that zero reset will not be available when logging is in progress in this case the accumulating total will be automatically set to zero at the beginning of each logging interval See section 4 9 3 for further details 4 2 2 Event digital channels The display will either show binary or decimal format depending on which has been selected in CHANNEL SETUP See section 4 9 4 for further details 4 2 3 Elapsed time between events An additional channel is automatically selected when you have selected the following logging modes See section 4 8 for further details 15 MODE log event MODE log eventtinterv
8. STAT mem size 249K Memory size may be changed within this function The default memory size is 250 000 readings but options are available to increase total memory size to 500 000 1 000 000 or 2 000 000 readings This is particularly useful if you know how much information you need over a particular time period and wish to avoid excessive data retrieval and downloading If you wish to change the memory size press and hold set 31 Subsequently pressing set will scroll through the available memory sizes from 1K to 30K in 1K increments and thereafter in 20K increments Holding down set will allow you to scroll through the memory sizes faster 4 10 4 Sensor power on facility STAT se 10 seco Some voltage current channels have additional connections to allow sensors to be supplied with power from logger All models allow this power to be set at either 9V DC or 5V DC This setting can be changed only by dismantling the logger and moving the jumpers for each output as required See section 12 10 for more information on moving the jumpers The 9V setting is only approximate The voltage is that of the internal batteries or the 12V external power supply if present The 5V DC is accurate to 0 1 Some sensors need to be switched on prior to measurement for a minimum length of time to allow the output to stabilise This facility allows you to switch the sensor on between 1 second and 60 seconds in 1 second increments prior to measurement all senso
9. have been in either a very high or very low pH may take a while to settle Occasionally the output of a probe may continue to wander never really settling on a value This is an indication that the probe has expired and should be replaced As explained in the above section the logger will power down its pH input circuitry under certain conditions When this happens any pH probes that may be connected will deteriorate more quickly than normal so it is strongly recommended that any pH probes be disconnected and stored properly when not in use The tip of a pH probe should always be kept wet so there are some important points to remember when storing one After use the tip of the sensor should be rinsed in pH 7 0 buffer solution The end cap should then be sealed on while the tip is still wet These actions should help to preserve the life of the probe and make for speedier calibration when it is next used 53 10 Special Instructions This section contains instructions for special 1000 Series Loggers so do not necessarily apply to your Squirrel s 10 1 Alarms e High and low alarms individually configurable on each channel e The alarm output is asserted and the relay contact is closed whenever any channel is in an alarm state while logging 10 1 1 Squirrel settings Low Alarm For each selected channel a lower alarm threshold can be set or unset By default no value is set LOW ALARM ch 1 o O To select the channel
10. may also be monitored using changes in voltage levels see 0 1000 Series loggers with additional event channels will have a 10 way terminal block Inputs may be connected via a contact to one of the common ground pins as indicated in the following diagram common individual event inputs ground rr 123 4 5 6 7 8 GND In both cases if the maximum voltage could exceed 5V then the addition of a 1K resistor in series with the input will allow voltages up to 6V to be used 40 5 10 Wiring up for external triggers Logging can be started or stopped by an external signal This external signal can be in the form of a voltage or a contact and should be connected between pin 14 and common ground See 4 8 11 for further information common ground oo rnal Soa 13 o 9 trigger 41 6 Troubleshooting guide 6 1 Why won t it do that Having described the many things you can do with a 1000 Series Squirrel here are just a few operations that are not possible clear the memory while logging is in progress start logging when the memory is full start logging if no channels have been selected perform multiple runs if memory is in continuous mode reset pulse count while logging is in progress change date and time while logging change start date and time while logging change log and sample intervals while logging It is not possible to change the following either when there are readings stored in memory or when logging
11. note of the COM port number for each USB slot on the computer as it will be required by the Darca software 9 way female D Description 6 way male mini connector DIN connector 5 Ground 3 3 Data from computer to Squirrel 6 2 Data from Squirrel to computer 2 4 amp 6 Link A 7 amp 8 Link B 14 2 2 Landline modem connection details For connecting a 1000 Series Squirrel to a modem the cable LC69 is required 25 way male D Description 6 way male mini connector DIN connector 7 Ground 3 2 Data from Squirrel to modem 2 3 Data from modem to Squirrel 6 4 5 amp 20 Link A 66 Declaration of Conformity Manufacturer Eltek Ltd Haslingfield Cambridge CB23 1LL UK Description of Equipment 1000 Series Squirrel Meter Logger confirm that this instrument conforms to the requirements of the EMC Directive 89 336 EEC amended 92 31 EEC and carries a CE mark indicating conformity Applied Standards Harmonised European Standard EN50081 part 1 and EN 50082 part1 for emission and immunity Radio products conform to ETSI EN300220 1 ie a eeeeeereceteeE L G H Hatfield Managing Director Eltek Ltd _ 01 12 2014 Date 3 67
12. the inputs on the datalogger The connections are the same as for voltage with the addition of a link between the amp and dinputs This link is essential and must be provided by the user sensor output sensor output Otv cec vc sensor output sensor output m E 5 5 How to provide a power supply to the sensors Each voltage current channel has its own connections to allow sensors to be supplied with power at 5V DC or 9V DC By default the voltage will be at approximately 9V DC The exact voltage will depend on the state of the internal batteries or the voltage of the external power supply if present Some models have the option to change the sensor power to 5V DC 0 1 This is dealt with in section 4 10 4 The maximum total current available is 50 mA Section 4 10 4 describes the logger setup procedure to switch power to the sensors prior to measurement The following diagram shows how to connect the sensor to the switched sensor power supply power to sensor power to sensor c Fo 37 5 6 Wiring up Current Loop Sensors driven by the Squirrel sensor output 5 7 Wiring up an AC voltage input AC inputs have 3 pin DIN sockets for connecting a range of different sensors Rogowski coils Voltage Transducers and Current Transducers can be connected to any of the AC voltage inputs Some inputs also allow thermistors to be connected For 1010 1020 electricity loggers see also section 8
13. way or the memory card can be removed and inserted into a computer where the data can be copied directly onto the hard disk The second method is performed using the file Conversion tab in DarcaG Memory Card Utils 7 4 2 File Conversion Once the card is in the PC the data can be copied and processed by the File Conversion utility e Select the quirrel tadd file from your SRAM card with the first rowsedbutton The filename will appear in the Gelected TAD Filed box e Choose the name and location of the DAT file that you want the data 46 to be stored in with the second rowsedbutton e Click the Gonvert button to copy the data from the SRAM card and store it on your PC as the chosen DAT file 47 8 Electricity Squirrels 1010 1020 Electricity Squirrels have inputs for AC transducers like Rogowski coils current and voltage transducers An extra function in the Squirrel allows easy reviewing of the maximum logged values stored on each channel Additionally the last two channels out of every eight can be used for temperature probes 8 1 Logger functions 8 1 1 Intervals Due to the long settling times when measuring AC the Squirrel minimum log or scan interval is increased to 5 seconds when more than one analogue channel is selected Selecting digital channels does not affect this minimum interval 8 1 2 Maximum While logging the Squirrel monitors each selected channel for peak values This function allows the u
14. 7 4 5 The delayed START function 17 4 6 The INT function logging sampling interval 19 4 7 The OUTPUT f nction edett reeter bentre teta 20 48 The MODE fUnCHONm esetet tetetete tetett tets 21 4 9 The CHANNEL SETUP function 27 4 10 The STAT TUNCuOn eeel eeek tr t trethi 30 Connecting sensors signals to the datalogget 35 5 1 Wiring up thermistor sensors ccccecceeeeeteeeeeeeeetee 35 5 2 Wiring up platinum resistance sensors ccccecceeeees 35 5 3 Wiring up sensors to voltage channels s 36 5 4 Wiring up sensors to current channels 36 5 5 How to provide a power supply to the sensors 37 5 6 Wiring up Current Loop Sensors driven by the Squirrel 38 10 11 12 5 7 Wiring up an AC voltage input 38 5 8 Wiring up a pulse Count channel ccccccccccceceeeeeeees 39 5 9 Wiring up event Channels ccccceeceeetseeeeeeeeeeeteee 40 5 10 Wiring up for external triggers eeeeeeeteeeeeeeeetee 41 Troubleshooting guide ee 42 6 1 Why won it do that 0 cece cceeesteeeteeeteeeseeeeeeees 42 Memory Card Squirrels 1000 series only ccccsssessseeee 43 al Types Of Catdizans nat a ee a a 43 7 2 Preparing the Card cccccccecccceccseeeeeeeeeeeeeectteeeeeeeeeteee 43 ES Squitrel Settings y visit ede eee ee ee eed 43 7 4 Extracting the data i scnenetsi einen 46 Electricity Squirrels 1010 1020
15. D A pre OLD TO C sent H CLEAR If the size of the card is not displayed it is due to one or more problems The nature of the problem is clearly stated on the display In this example the Squirrel has found that the card has not been properly prepared with the SQPrep utility Until this is done successfully the logger cannot use the card If the display shows REPLACE BATTERY 6then the battery is starting to fail and should be replace as soon as possible If the display shows BATTERY DEAD and there is important data in the card then you should replace the battery before removing the card from the logger WRITE PROTECTED dis displayed if the Write Protect switch on the card is on The logger cannot write to the card while it is write protected so this should be switched off Once the Squirrel is configured to use the card rather than the memory the following will be displayed CARD in use size 1040K This tells you of the status of the card and reminds you not to remove the card 7 3 2 Choose memory Pressing the select button again will display the memory selection page This is where you can choose whether the internal memory or the memory card should be used when logging This screen also displays information about any data stored on the card In this example the card has no Squirrel data in it CARD empty using memory If there is any Squirrel data present in the card then the display will show the following CARD h
16. E will appear on the display and then the logger will recalibrate itself on the current channel to read the correct value in this example 9 00 pH SLOPE9Q ch 9 9 00 pH If the display is showing RANGEowhen the set button is pressed the display will show ANNOT SET to indicate that the probe cannot be calibrated The Squirrel retains its previous calibration setting Select the next pH channel with the select button and calibrate it in the same way This must be done for all the channels that are required 9 6 Current Consumption and Battery Life Due to the sensitive nature of pH probes the Squirrel has to provide a constant power supply to the pH input circuitry when pH inputs are in use This power supply is switched on when one or more of the pH channels 52 are selected for metering or recording If the logger is not recording or waiting for a delayed start the power supply is switched off at midnight This power supply is the reason for the decreased battery life This is reflected in the displayed battery life in the STAT function 9 7 Care and Use of pH Probes pH probes are very sensitive Depending on their age and history they can take a while before settling on a value During probe calibration each pH probe should be allowed enough time to settle Always wait until the reading to stays constant for ten seconds This is usually fairly quick but old probes probes that have been allowed to dry out and probes that
17. Table Of Contents INTOGUCTION 24 22 he tell A oes 4 The functions of the datalogger ecceceecseessseeeeeeeeeneees 5 21 LOG iinet el otel hl otobet edad E EEA 5 22 MB TE a siete het henstet dete deleted Qlohe bebetel Delta Bek ched te 5 2 3 REVIEW RE E E chet stel het otescbot tel hes otis ches abet 5 24 TIMES date eisce scien EA A EEN 5 25 START time date cieetcitinateneattadetetatetanelenebenehnednncted 5 2 6 INT log sample logging sampling interval 20 5 29 COUT PUT tnt ENAERE TEES EE AE E 5 PA e MODE E A E et shen hen hes chet 6 2 9 CHANNEL SETUP ccccceecceeceeeeeeeeeeeeceeeeeseeeeeeeenaeees 6 2 10 STAT Status cece cece ee eeeccneee tere ee teeecaaeeeeeeeetteee 6 How to start logging from the default settingS 0008 7 Bl Ser time date eege etete tee eiere tae bete tatetik 7 3 2 Select logging interval ceeeeee cere eeeeetteeeeeeeeeeee 8 3 3 Set the type of logging required 8 3 4 Set the number and types of channels 9 B25 Stat logginGetieteieteiedeceltiecteletetersbereebetebetebetel teh iebettes 11 BiG StOp lOGGING MANE aE EEEE AEE E E E EEEE 12 More about the functions of the datalogger cccceeeee 13 AI ASCO Une a A 13 4 2 The METER function cc cceeeesesseeeeeeeeeeseeeeeesseeeeeeeeee 15 4 3 The REVIEW function sesiet cceceessessessssesseesessssseeeeeeeees 16 4 4 The TIME and date function ce eeeeceeeeeeeeettteseeeeeeeees 1
18. above in section 12 8 and the same cautions apply All boards down to the one that needs the adjustment will need to be removed The sensor power jumpers should always cover two of the three pins and are usually situated close the input connectors The appropriate jumper needs to be moved to connect the middle pin to the other edge pin The boards must then be reassembled in the correct order taking great care to align all of the pins on the internal connectors Care should be taken to replace the hexagonal spacers in their correct positions they are of different lengths for different positions 62 13 Technical data 13 1 Inputs ranges and resolutions Thermistor temperature U 50 to 150 C 58 to 302 F See below Best resolution 5 to 75 C 0 05 C 25 to 5 C amp 75 to 100 C 0 1 C 40 to 25 C amp 100 to 125 C 0 2 C Worse resolution 50 to 40 C amp 125 to 150 C 0 4 C Thermocouple temperature T 200 to 200 C 328 to 392 F Impedance 100k 200 to 350 C 148 to 662 F Thermocouple temperature K 200 to 200 C 328 to 392 F Impedance 100k 200 to 450 C 328 to 842 F 200 to 1200 C 328 to 2192 F PT100 temperature P3 P4 200 to 100 C 328 to 212 F 200 to 400 C 328 to 752 F 200 to 600 C 328 to 1112 F DC voltage 0 to 50mV 25 to 25mV Impedance 1MQ 0 to 100mV 50 to 50mV 0 to 200mV 100 to 100mV 0 to 500mV 250 to 250mV 0 to 1V 500 to 500mV 0 to 2V 1to01V 0 to 5V 2 5
19. al MODE log eventtaverage MODE extern trigger reco This additional channel which numerically follows the last physical channel is for measuring time between recordings The number of seconds that have elapsed between events or external triggers will be displayed in this channel and may be viewed in METER mode METER eh Ala 123 s 4 3 The REVIEW function The display shows the recorded value of the selected channel starting with the first reading in the most recent run or the first reading in the current run if logging is in progress Press select to choose which channel you wish to review Once the channel has been selected each press of set will update the readings from first to last A rotating bar indicates that the next reading has been selected REVIEW ch 2 20 3 C REVIEW ch 2 20 2 C REVIEW ch 2 20 4 C Holding down set will display the readings rapidly until the following is 16 displayed REVIEW ch 2 No more At any time you may skip to another channel and restart the review by pressing select 4 4 The TIME and date function This displays the real time and date on two lines The time clock is in a 24 hour format HH MM SS The format of the date may be changed for using the STAT function Please see section 3 1 for details of how to set the time and date Although invalid times and dates are allowed to be set when function is pressed the entries are validated The logger modifies th
20. annels Some Squirrels have pH inputs Such inputs require individual two point calibration and temperature compensation The Squirrel supports two types of temperature compensation measured and pre set 9 1 Channel Selection The pH channels have two ranges available These are actually both the same range the difference is where the temperature compensation comes from Choose from the pre set temperature which can be altered in the STAT function or from the associated temperature channel as illustrated below If the latter is chosen one of the 50 C to 150 C ranges of the temperature channel must also be selected otherwise the logger will perceive this as an error and switch the range to use the pre set compensation In this situation the display will show dNVALID 7 CHECK to alert the user that this has happened CH 9 pH chi 0 0 14 0 It is worth noting that if the temperature channel is selected but no probe is plugged in then compensation will again be taken from the pre set value In this case the pH dangedis unchanged the temperature input would still be used if it were connected 9 2 Pre setting the Temperature If the temperature of all the pH probes is known to be constant or if high accuracy is not required then it is not necessary to use a temperature probe for compensating the pH probe The temperature of the pH probe can be set in the STAT function STAT pH temp 20 0 C Press and hold set to cha
21. arted in the usual way by pressing set in the LOG function see section 3 5 In this example only two event lines are being used A recording is made whenever an event occurs which is whenever either event line changes level 22 voltage high contacts open low contacts closed contacts open high contacts closed time JU8A9 JU8A9 JUSA9 JUSA9 JUS8A9 JUS8A9 JU8A9 JUSA9 23 4 8 5 Interval logging with events MODE log eventtinterval This is a combination of event and interval recordings and therefore readings are taken at the end of each recording interval and each time any event input changes state If events coincide with the logging interval then two sets of recordings are made Pulse inputs record a dummy6 value when events occur and true accumulated values are only recorded after each recording interval 4 8 6 Logging averages with events MODE event This is a combination of event and average recordings Averaging occurs exactly as in section 4 8 3 and event recordings allow non averaged values of the selected channels to be recorded whenever an event occurs see 0 Pulse inputs record a ummy value when events occur and true accumulated values are only recorded after each recording interval 4 8 7 External trigger MODE 1000 series only In this mode logging can be started and stopped by external signals Press set to change to the following available option
22. ch case logging may be started by an external trigger e g a machine switching on 4 1 2 Used free memory number of runs recorded Whenever the LOG function is entered press select to scroll through sub functions The first screen displays the number of memory slots already used for storage of data and header blocks LOG off used 100 The next screen displays the number of memory slots available for further logging The number of separate runs already recorded out of a maximum of 99 is displayed in the last screen If the logger is logging then the current run number is displayed LOG off run 3 4 1 3 Start stop logging If you have just unpacked your datalogger and have not previously used this model then please go to section 3 Whenever you first enter the LOG function you can press and hold set to start and stop logging LOG off used 12345 LOG on used 12345 N B you can only start and stop logging when the display shows either of these screens 4 1 4 How to clear the memory The procedure for clearing the memory has been designed to reduce the risk of the user accidentally clearing the memory It is not possible to clear the memory while either logging or waiting to log It is only possible to clear the memory using the following sequence Press function to wake up the datalogger and press select within 10 seconds to obtain either of the following displays LOG off free 12345 LOG off run 3 4 2 The
23. ch may be seen during the downloading process are shown below OUTPUT 9600 baud comms block 6 OUTPUT 9600 baud idle OUTPUT 9600 baud comms block 5 The number of blocks transmitted will decrement until the display clears to indicate that all the data have been transferred Please note that downloading of data can be achieved while logging is in progress and that the following minimum logging intervals are permissible corresponding to the appropriate baud rates Baud rate Minimum logging interval 300 10 seconds 1200 3 seconds 2400 2 seconds 4800 38400 1 second 4 8 The MODE function Once you have entered this function using the function button press select to select from the following sub functions Please note that you cannot change any entries in the MODE function while logging is in progress or while readings are still stored in the memory 4 8 1 Mode log Press set to change the type of logging required from the following options 4 8 2 Interval logging MODE log interval The inputs from each channel selected are measured at each logging interval and stored in memory Pulse inputs record the total number of pulses received during this interval The logger records the first readings as soon as logging is started although pulse inputs record a dummy value at this point Please see section 3 2 for instructions on how to change logging intervals 4 8 3 Logging averages MODE log average In this option
24. e entries to the nearest valid setting and displays a warning that the initial entries were invalid For example the following would occur in UK date format i e DD MM YY TIME 10 43 17 date 25 13 94 TIME 10 43 17 INVALID CHECK a o Z om NI gt ao eae A No ae on ARN The time and date cannot be altered if logging is in progress Pressing set will indicate this to the user 10 44 34 H O QZ m ING 4 5 The delayed START function This function is used if you wish to set a future time and date at which logging will start Once you are in this function press and hold set until you obtain a cursor START Now press select to place the cursor under the entries that you need to change START 0 0 1 0 0 00 0 194 This entry may now be changed by pressing set until the desired value is achieved START 00 0 01 0 I0 00 194 Other entries may be changed in a similar way using select and set When the desired delayed start time and date has been set you can press function to store these parameters START 00 05 55 31 12 94 It will usually be the case that the start time will be later than the current real time and the logger will wait until the start time before commencing logging In this case the following message will be displayed START 00 05 55 delayed start N B Remember that you must also set the logger to start logging in the LOG function see 0
25. ensor FA SA PEO OO ae Jle lv c Note The denotes the ground connection This should be connected to the cable screen if any 5 2 Wiring up platinum resistance sensors Individual plug in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogger 1000 Series loggers support both 3 and 4 wire PT100 sensors and may be marked in either of the two ways shown below sensor sensor 3 wire connection 4 wire connectior N B It is essential for 3 wire sensors that the resistances of all the connections are equal i e the wires used for these connections should be of the same material gauge and length This allows the circuit to cancel the effects of lead resistance on the sensor measurement 35 5 3 Wiring up sensors to voltage channels Individual plug in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogger The positive output from the sensor should be connected to the wdinput and the negative to the 6dinput sensor sensor sensor output power output Gaa HE O v C sensor sensor sensor output output power Note if the cable used has an independent screen this may be connected to the ground terminal which is marked 6 H E 5 4 Wiring up sensors to current channels Individual plug in terminal blocks with cable restraints are provided to make the connections to
26. et to change value TIME 10 46 17 date 25 12 94 Press function when settings are correct cursor will disappear and clock will restart with new settings TIME 10 46 19 date 25 12 94 If invalid data is entered the display changes the settings to the nearest valid time date 3 2 Select logging interval The logging interval can be set between 1 second and 24 hours in 1 second increments Recordings are stored at this interval Press function until display shows INT log 00 00 30 sample 00 00 00 Press set to display INT log 00 00 30 HOLD TO CHANGE Hold set button and cursor will appear INT Log 00 00 30 sample 00 00 00 Press select to move cursor INT log 00 00 30 sample 00 00 00 Press set to change value INT log 00 00 35 sample 00 00 00 This example changes the logging interval from 30 to 35 seconds Press function to clear the cursor and to continue with setup 3 3 Set the type of logging required The possible types of logging are detailed in section 4 8 1 However the default setting is for recording data at fixed intervals only Press function until mode is displayed MODE log interval You need do nothing else except set which channels to log if you simply need to record data at the logging intervals set in section 3 2 3 4 Set the number and types of channels Each model has a specified combination of channels please consult the data sheet in Section 13 for details of your pa
27. ger will challenge any attempt to leave the function until at least one channel has been selected CHA EL SETUP NON SELECTED 4 9 1 Temperature channels Please consult the data sheet in Section 13 to confirm which temperature sensors are compatible with your model of datalogger Most temperature sensors provide an output that is non linear across its operating temperature range and each model has a built in sensor specific linearisation protocol Most offer a selection of temperature ranges relating to the operating range of the specific sensor and may have separate ranges for variants such as types K and T thermocouples or 3 and 4 wire platinum resistance sensors For example a logger with thermocouple inputs will offer the following ranges where the resolution will be 0 2 C See section 5 1 for details of how to connect thermistor sensors 4 9 2 Voltage current channels Normally these channels may be configured for voltage or current There are 18 voltage ranges and 2 current ranges details of which may be found in the data sheet in Section 13 These channels have an additional range called the EU Engineering Units range where you can select specific engineering units e g Lux and a min max scale e g 0 500 Lux the appropriate voltage current range is then selected from the existing hardware ranges e g 0 5V In this example when the appropriate channel is selected the following will be displayed 28 0 000
28. ggering All connections are made to the Gignal connector 15 way male D Connect external trigger signal High to pin 14 external trigger input and external trigger signal Low to pin 13 common Squirrel ground 25 voltage high contacts open low contacts closed time recording enabled disabled enabled disabled 4 8 11 Types of signals which will trigger the logger If external contacts are used logging will start when they close connecting pin 13 to pin 14 and stop when they open Alternatively voltage levels can be used instead of contacts In this case a low level of less than 0 5V DC will start logging and a high level of between 4V and 6V DC will stop logging 4 8 12 Memory mode You can choose how the memory is used to store the readings 4 8 13 Hold memory ODE memory stop when full The logger will stop when all available memory has been used Note that you may view remaining free memory at any time by entering the LOG function and pressing select see section 4 1 2 and the memory size may be restricted down to a minimum of 1K in the STAT function see section 4 10 3 4 8 14 Continuous memory MODE memory continuous The logger overwrites the oldest recordings once the memory is full This ensures that you always have the most recent data stored in the logger irrespective of how long the logger has been logging However only one run is allowed and if the logger is stopped and a restar
29. h the capability to records at faster than one second intervals The following sections refer to these loggers only 11 1 Logging Interval In order for the Squirrel to operate in fast logging mode only analogue channels must be selected No digital channels may be selected The logging mode must be set to Interval the external trigger mode can be unused or set to external trigger runs and the memory mode must be stop when full If these conditions are met the Logging Interval function will look something like this INT log 00 00 00 1 The interval can be altered in the normal way If dast logging modedis not required then the tenths of a second should be set to zero Interval values up to 9 9 seconds can be set in fast logging mode It is not possible to set values greater than this if the tenths are not set to zero When logging in fast logging mode no function other than amp O0G can be selected This is true even if the interval is for example 8 4 seconds If the interval were 8 seconds or 9 seconds this restriction would not apply as the logger would behave as normal When in fast logging mode the Squirrel can still be stopped and started in the normal way e When using an external trigger to start fast recordings the logger must either be in the Log function or the display must be off e When attempting to start fast logging using the delayed start option the logger must be left with the display off e The minimum
30. he guarantee You should return the Squirrel to your supplier who will be able to replace it for you If you are comfortable with this and feel you are competent enough proceed as follows The four case screws must be removed one is hidden under a battery contact in the battery box The top of the case can then be lifted off The 1A fuse on the board with the external power connector is for the external power input The channel input fuses 250mA are by the connector for each current input The sensor supply fuse 250mA is on the far right of one of the input boards All fuses are the round plug in types 12 9 Changing memory Save any data before installing the new memory chip or module e Remove the battery cover and the two cells nearest the edge of the case e Unscrew the four retaining screws holding the two halves of the case together One screw is located behind the corner battery spring e Separate the two halves of the case carefully as the button panel fixed to the front panel is connected by a short ribbon cable to the main PCB e The Memory integrated circuit or module is located in a socket to the right of the display It is the middle of the three large integrated circuits e Using a flat bladed screwdriver prise the chip out of its socket by inserting the screwdriver underneath the chip and levering it up carefully e Insert the new chip or module ensuring that it is the correct way 61 round The notch on the ch
31. ility Use the amp tartd button to format the card as you would a floppy disk do not worry that the type of format is set to Quickd 7 2 2 Preparing the card Before the Squirrel can store data on the Memory Card the card must be repareddby creating a file on it to hold the data Use the reparedbutton to create this file it will be named Squirrel tado Check that the size of this file corresponds to the size of the Memory Card 7 3 Squirrel Settings An additional function has been added to the Squirrel This controls the use of the memory card and is the only place where a card should be inserted or removed The function consists of three sub pages 7 3 1 Card size Before inserting a memory card the display will show the following 43 This tells you that this is the point where a card may be inserted Until this is done pressing the select button will not display the next page of the function Once a card is inserted its size is calculated and displayed CARD present size 1 D4 0K The card size displayed is a calculation of how many thousand readings can be stored on it Note that this is approximately half the number of kilobytes on the card This is also the point where a used card may be removed Cards may also be erased in this function If you have inserted a card that contains Squirrel data but you wish to clear it in order to record a new run onto it press and hold the set button The display will show the following R
32. ilter frequency is displayed This must be set to the local mains electricity supply frequency to produce the most accurate readings The frequency is changed using the set button press and hold to change the filter frequency to 60 Hz 4 10 8 Logger firmware version and model type This displays the model number and version of firmware followed by the serial number of the 1000 series Squirrel datalogger 4 10 9 Temperature Units This function enables you to change the temperature units in the Squirrel between degrees Fahrenheit and Celsius If this is changed you must change the range using Channel Setup 4 10 10 RS232 Network Option Multiple Squirrels equipped with this option can be connected in parallel This is referred to as fnetworkO Note a special connecting cable is required The option must be ON for RS232 Network functionality and OFF if not required The Network setting in the Darca software application must be configured to correspond with this setting in order to communicate with the Squirrel Note Network Option does not refer to Ethernet connectivity 34 5 Connecting sensors signals to the datalogger 5 1 Wiring up thermistor sensors Individual plug in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogger Thermistors often have no designating letters since they have no polarity thermistor thermistor thermistor thermistor sensor sensor sensor s
33. ip is to the left next to the display Modules have the notch indicated in a white rectangle The notch is next to the capacitor marked C1 e Check the position of the two jumpers to the left of the chip just above the larger chip For 64K memory the two jumpers should link the right hand two pins For 260K memory the two jumpers should link the left hand two pins For RAM modules use the 64K option e Temporarily replace the two cells or plug in an external supply The display should come on and will indicate the memory size e Replace the top half of the case and the two side pieces remove the two cells and insert the four screws e Replace the two cells and fit battery cover To check e Press Function to enable display e Press Select button once The bottom line of the display will indicate free memory now available Early loggers prior to 2004 were supplied with 64K reading memory this can be upgraded to 260K reading memory by installing chip only Current standard memory is 260K reading memory Increasing memory to 500K or 1 000 000 or 2 000 000 reading memory is by substituting chip with appropriate module 12 10 Sensor supply voltage The Squirrel is shipped with the sensor supply voltage selector jumpers all set to 9V If 5V 0 1 is required to power a sensor then an internal jumper needs to be moved For more information on the sensor supply see section 4 10 4 The method for removing the top of the case is detailed
34. is in progress Log mode External trigger mode Memory mode Channel set up and ranges Engineering unit ranges Memory size Language type Sensor switch on time Date format Filter frequency 42 7 Memory Card Squirrels 1000 series only Memory Card Squirrels have a slot in the front for a low power PCMCIA SRAM card of between 128Kb and 4Mb in size The Squirrel can log directly onto the card or copy runs onto it from its internal memory A Windows file system allows direct access to Squirrel data from a PC 7 1 Types Of Card Not all types of SRAM card are compatible with the Squirrel Cards made by Panasonic are the only cards that have been tested by Eltek and are recommended for use with Squirrels Other cards may be compatible but could result in excessive current consumption 7 2 Preparing the Card Before the Squirrel can use the card it must be formatted and then prepared with DarcaG Memory Card Utilsdfeature Note If your SRAM card does not appear as a Removable Drive in Windows Explorer you must configure Windows to read SRAM cards with your card holder Search for amp RAM6in Windows Help for information on how to do this 7 2 1 Formatting the card Open DarcaG dlemory Card Utils feature it is accessed from the File menu Your SRAM card will appear under the list of Removable Drivesd with corresponding status information in the three boxes to the right Click the Format Drivedbutton to open Windows6Format ut
35. led the EU Engineering Units range where the user can select specific engineering units e g m s and a max min scale e g 0 50 m s The appropriate voltage current range is then selected from the existing hardware ranges e g 0 1 V In the above example 0 50 m s 0 1V and the display in METER mode will show readings in m s All data in this channel will be stored and downloaded using m s as the unit In the above example the CHANNEL SETUP function will alternate between the following displays 0 000 1 000 The EU range may only be set up using Darca please see price list or contact your distributor for details Whenever a voltage current channel has not been set up the initial range is always the default EU range and is displayed as follows 0 000 1 000 Press select to change channel For example select channel 5 10 CH 5 not used Press set and hold for 3 seconds CH HO i TO CHANGE Now press set to scroll through the voltage current ranges Leave the display showing your chosen range and press select to set up another channel or press function to continue with logger setup 3 4 3 Humidity channel setup The default EU Engineering Unit range for all voltage current inputs as described in 4 4 2 is 0 1V 0 100 which is suitable for probes such as the EplusE EE08 and Rotronic Hygroclip S3 HC2 These probes plug into any voltage current input selected using the CHANNEL SETUP function Press and hold se
36. logging interval allowed depends on the number of selected channels Allow 0 1 second for every 8 channels e Logging intervals of 2 3 4 5 6 7 8 9 seconds operate as normal logging e Important Unused channels must be de selected when logging in the fast mode If left selected the readings on the selected channels may be slightly inaccurate 11 2 Translation with Darca The tenths of a seconds will not be included in the standard time column as this is not compatible with most spreadsheets When translating files that have been recorded in fast mode it is necessary to include the 57 elapsed time column To switch it on select Preferences then Export and choose Generate Elapsed Time Column 11 3 Darca Contact It is not possible to contact the Squirrel for either controlling or downloading while it is logging in dast logging moded Logging must first be stopped using the button on the front of the Squirrel 58 12 Safety and operating conditions 12 1 Operator safety TO PROTECT AGAINST SHOCK HAZARDS TO OPERATORS datalogger inputs and outputs should not be connected to voltages of more than 25V DC or RMS AC with respect to earth ground unless the datalogger is inside a protected enclosure 12 2 Squirrel safety The following inputs are protected up to specific voltages Input type Maximum voltage Analogue 25 External trigger 6 Pulse 6 Event 5 can be increased to 6V see 5 8 1 External Power Supply 14
37. logging interval is 30 decreased Averaging functions in particular will increase battery consumption considerably Temperature fluctuations affect battery voltage and hence the remaining battery life The battery life estimate assumes that the working temperature will be between 20 C and 65 C At 30 C the battery life can be decreased to 10 of normal For extended operation at temperatures below 10 C Eltek recommends Energizer lithium non rechargeable batteries The battery life estimate also takes into account the sensor switch on time and assumes that the sensor draws 10 mA The memory that stores the data and datalogger settings is protected by a Lithium coin cell see 12 5 If fLidis displayed in the top right hand corner of the display then the Lithium coin cell must be replaced STAT battery Li Orn af 2 SV 65 days 4 10 2 External power supply STAT ext supply 8 9 V The logger can be used with an Eltek external DC power supply type MP12U if GSM modem use anticipated or MP12U5W in all other situations These are ultra low leakage and wired correctly with a 2 1mm power jack An external supply should always be used for situations which involve long term deployment averaging high current demand sensors and when using the logger in METER mode for prolonged periods If the external supply fails the internal batteries provide backup to keep the memory secure or to continue logging 4 10 3 Memory size selection
38. n the last run if the logger is not currently logging If the logger is currently logging then the first reading in the current run is displayed 2 4 TIME date Displays the real time and date on two lines The 24 hour clock may be displayed in the appropriate country format see 2 10f the time increments every second 2 5 START time date This option allows you to set a future time and date at which logging will start 2 6 INT log sample logging sampling interval The interval function is used to set the time intervals at which readings are taken and stored in memory The logging interval can be set between 1 second and 24 hours in 1 second increments The second line is used to set the time intervals at which inputs are sampled these readings are averaged and then stored in memory at the logging interval 2 7 OUTPUT Used for output of recorded data to a computer During downloading of data the LCD displays the number of blocks to be downloaded and this is decremented after each successful transmission of a block No baud rate 5 setting is required as it is automatically selected 2 8 MODE Used to select the type of logging required namely Interval Average Event Event Interval Event Average This function allows you to select how logging may be started and stopped via an external trigger if required In addition you can select whether you wish logging to stop when the memory is full or whether logging contin
39. nected PC running EltekG Darca software The operating buttons on the front of the logger allow the setup of nearly all of the major functions of the logger but some functions can only be accessed through Darca These include e Scaling EU units in a channel e SMS Alarm operation For more information on using Darca consult the document TM1020 Overview of the operating buttons function selects the function select selects the channel or sub function set is used to change any of the settings To switch the datalogger on press and hold function To switch it off leave in LOG or OUTPUT function for a few seconds If the datalogger is left on in any other function it will automatically switch off after 4 minutes 2 The functions of the datalogger Listed in the order they appear when scrolling with the function button 2 1 LOG Used to start and stop logging In addition this function displays the number of readings already stored in the memory used and the number of readings that may be stored in the remaining memory free All the readings stored in memory may be erased in this function In addition this function will allow you to display how many separate runs have been recorded 2 2 METER Displays the value of the channels that have been selected in the appropriate units The readings are updated every second 2 3 REVIEW Displays the recorded values of the selected channels starting with the first reading i
40. nge the value The longer set is pressed the faster the value changes 9 3 Choosing the Calibration Point Calibration of the pH probes requires two buffer solutions One must be pH 7 0 the other may be pH 4 0 9 0 or 10 0 The other extra STAT function is for setting the pH of this second buffer solution STAT pH slope 4 00 Press and hold set to change the value 9 4 Calibrating the Midpoint pH7 0 Before any sensor can be used with the Squirrel it must be calibrated using two buffer solutions An additional CALIBRATION function allows the setting of both pH 7 0 and pre selected calibration point or Gloped see above Select the CALIBRATION function After a couple of seconds the display will change to show the calibration settings see below Place each probe individually in a pH7 buffer solution and allow it time to settle the time this takes will depend on the probe and how it has been stored or used See are and Use of pH Probesd below If the temperature compensation is being measured then the relevant temperature probe must be put in the same solution G 9 BUFFER h 64 pH 20 0C ics Once the value has settled the display should show UFFER7 in the top left hand corner If it reads RANGEG then the pH input is too far out of range to be set as the midpoint This is typically caused by a pH probe that has expired Once the probe has settled press and hold the set button HOLD TO CHANGE will appear on the dis
41. og6 facility that automatically resets the datalogger in the unlikely event of a system failure If failure occurs the watchdog will reset the datalogger and stop logging if logging is in progress Stored data can then be downloaded Should the datalogger ever hang up completely it must be reset manually by pressing the reset button This black reset button is located to the left of and below the opened battery compartment and is accessible through the aperture where the catch of the battery lid engages it should be depressed using a blunt insulated probe If this fails remove all power to it and leave it for 10 minutes before reconnecting and then press the reset 60 button 12 8 Changing fuses There are three places where fuses are used to protect the circuits of the datalogger These are the external power supply input the sensor supply outputs and each current channel input If an external supply is connected and cannot be measured as described in section 4 10 2 then the logger power supply fuse may be faulty If none of the sensor supply outputs is working then the sensor supply output fuse may be faulty If a current channel does not measure correctly then its fuse should be checked by measuring the resistance between the c and terminals of the input This should be 10 ohms Fuses should only be replaced by a competent person Any damage caused to the instrument while attempting to replace a fuse yourself cannot be covered by t
42. olds data using memor By default the internal memory is used If you have inserted a blank formatted card onto which you would like to log then this is probably the only setting that needs changing Press and hold the set button to switch between the internal memory and the memory card ty CHANGE If there is already Squirrel data in the card then the display will show the following warning instead of the usual HOLD TO CHANGE Gmessage 45 N B Neither this function nor the next can be accessed while the Squirrel is logging to the card 7 3 3 Copy readings It is sometimes more convenient to copy a set of readings to the card rather than to actually log to the card The final CARD function facilitates this Press and hold the set button to copy all the readings to the memory card While copying the display shows a message to that effect Copying data can take as long as 4 minutes for a 2Mb card or just 15 seconds for a 128Kb card CARD copy data copying data lf the card already contains data the same MVERWRITE CARD 6 message will appear It is possible to copy to the card while the Squirrel is logging to its internal memory though this may take longer Note that this function cannot be accessed while the Squirrel has been set up to use the memory card instead of its internal memory 7 4 Extracting the data 7 4 1 Introduction The data in the SRAM card can be extracted in two ways It can be downloaded in the normal
43. ons 00eeee 59 12 4 Operating conditions cect ee eeeeeteettteeeeeees 59 12 5 Protection against memory IOSS ccceeeeeeettteeeeees 60 12 6 Changing batteries ccccceccceeneeeeeeeeeeeeettneeeeees 60 12 7 Resetting the datalogger eeeeceseeeeeeeeeeeeeeteneeeeees 60 2 12 8 Changing fUSCS 200 0 cece cece e eee eeeeeeeeeeeeeeeeeteeeaaeeeeeees 61 12 9 Changing MeMOl cccccceeeeeeeeettteeeeeeeeeeeestneeeeees 61 12 10 Sensor supply voltage ec ceeeeeeeeeeeeeeeettteeeeeees 62 13 Technical data c s csi cccsteseseiscateh cis Eron aeneae Eana aE aaar 63 13 1 Inputs ranges and resolutions eeeeeeeeeeeees 63 13 2 Specilication 4 ac6ceasiieei 64 e SCOMMOCHIVITY o oo ccc T 65 14 1 Signal connector eeceeeeeeeeeeeeeeceeteeeeeeeeeteeetneeeeeees 65 14 2 Output connector for connection to a PO 65 Declaration of Conformity 0 cccccccseeseseeeeeeeeeeeeeseeeeeeeeeeeeeeessneeeeeeees 67 Manufacturer cece ceeecccccee eee eeeeeeccaaeeeeeeeeeeeeecaaaeeeeeeeeteeeeaaaes 67 Description of Equipment ceceeeeeeeeeeneteeeeeeeeeteeetteeeeeees 67 Applied Standards cccccceeeeeeeeeeeeeeccnneeeeeeeeeeeeccaeeeeeeeeenee 67 1 Introduction This user manual covers the operation and configuration of the Squirrel datalogger via the three operating buttons on its front panel The Squirrel can also be configured and operated from a con
44. p to room temperature 12 5 Protection against memory loss The memory which stores the data and datalogger settings is protected by a Lithium coin cell 3V Panasonic BR2032 This battery is only used if the voltage of the main batteries is below the operating threshold If there are no main batteries connected the Lithium coin cell will protect the stored data for approximately 2 years The condition of the Lithium coin cell may be checked in the STAT battery function see 4 10 1 If didis displayed in the top right hand corner of the display then the Lithium coin cell must be replaced 12 6 Changing batteries USE ONLY NON RECHARGEABLE LR6 AA ALKALINE BATTERIES Using other types can damage the logger and external power source and can cause battery leakage leading to corrosion and subsequent logger failure It is important that one of the following procedures is used to change the batteries otherwise memory and logger settings may be lost Stop logging remove the batteries and wait at least 2 minutes before fitting new batteries as a complete new set of the same type Alternatively connect an external power supply for uninterrupted logging and then change the batteries It is good practice to ensure that the logger is not left for long periods without the main batteries as this will drain the Lithium coin cell which will need to be replaced 12 7 Resetting the datalogger The 1000 Series Squirrel datalogger has a dvatchd
45. play and then the logger will recalibrate itself on the current channel to read 7 00 pH h 9 BUFFER c 00 pH 20 0C 7 If the display is showing RANGEowhen the set button is pressed the display will show ANNOT SET to indicate that the probe cannot be calibrated The Squirrel retains its previous calibration setting Select the next pH channel with the select button and calibrate it in the same way This must be done for all the channels that are required 9 5 Calibrating the Slope The second calibration point is the slope The pH of the buffer solution used in this function should be set in the STAT function as described above Once that is set as desired calibration of the slope can be performed in this function The probes must be rinsed placed in the specified buffer solution and allowed time to settle If the temperature compensation is being measured then the temperature probes must be put in the same solution SLOPE9Q ch 9 9 31 pH Once the probes have settled the display should show amp LOPEn6 where is 4 9 or 10 If this does not match the solution that is being used then the slope value in the STAT function must be changed appropriately see above If it reads RANGE6 then the pH input is too far out of range of the preset value for the Squirrel to be calibrated to it Again this is typically caused by a pH probe that has expired Once the value has settled press and hold the set button HOLD TO CHANG
46. r power outputs will turn on together The maximum total current available is 50 mA If you have more than 1 sensor connected which needs this facility then you must choose the longest sensor switch on time required The sensor switch on time may be changed by pressing and holding set subsequent presses will allow you to scroll through the values Holding down set will allow you to scroll through the values faster A value of 0 seconds switches the sensor power on 10 milliseconds before the first channel is read Please note that in logging modes which combine event with interval or average logging the Gensor ondtime is measured with respect to the fixed interval or sample time respectively Therefore no particular Gensor ond time can be guaranteed for the event recordings However in vent only logging any non zero Gensor ondtime setting causes the sensor power output to be on continuously N B The Gensor ondtime should be set to zero when not required as otherwise battery life will be wasted 32 4 10 5 Date format selection STAT d DD The date format is shown in the UK default format the following formats are also available and may be changed by pressing and holding set This displays the language format which is changed by pressing and holding set The following are examples of the above display in the relevant language STATUS Sprache Deutsch ETAT langue Francais 33 4 10 7 Mains filter frequency The mains f
47. rigger as soon as the alarm threshold low start or high start is exceeded The logger checks for alarms at the sample interval and the alarm is triggered when the alarm is exceeded for the delay interval The logger must be logging for an alarm to be reported Meter When metering the display will show two asterisks when you are viewing a channel that is currently in an alarm condition METER ch 3 Mae 37 5 C This is helpful in finding the channel that is causing the alarm 10 2 Wind Speed amp Direction Special circular averaging on EU range for wind direction 10 2 1 Wind Direction Squirrels with Wind Direction inputs have a specially configured EU range on the last voltage channel This is set to a hardware range of 0 5V dc and will read 0 to 360 for this input The direction is also displayed as N WSW etc 10 2 2 Averaging A special averaging mode is implemented on the channel measuring wind direction When wind direction is being measured and the Log Mode is set to Average then the logger will sample as normal at the scanning interval Each reading that is calculated from these samples is a true circular 55 average it is not averaged as 0 5V dc as this would cause an erroneous readings under certain conditions e g When the direction varied around North say 375 to 5 the mathematical average would be 180 which is South 56 11 Fast Logging 1000 series only Some loggers are provided wit
48. rticular model This section will guide you to set up a temperature and voltage current channel Press function until the following is displayed CHANNEL SETUP 1 used The default setting will always be the first range of the first channel If you deselect all channels then you will not be able to progress until you have configured at least one channel In this case pressing the function key will only display the following message ZO OIT Zz gt mz z om mr mo om a4 mc ov Please proceed to the following sections for instructions on how to set up specific channels 3 4 1 Temperature channel setup Thermistors thermocouples and platinum resistance sensors are capable of accurately measuring temperatures within different ranges This example is for a datalogger with thermistor type inputs Press select once and the following message will be displayed Pressing select several times will allow you to scroll through the channels Press set and hold for 3 seconds C E TO CHANGE ao The temperature range then increments to the next available range with every press of the set button CH 1 F 22 0 158 0 Leave the display showing your chosen range and press select to set up another channel 3 4 2 Voltage current channel setup These channels may be configured for voltage or current There are typically 18 voltage ranges and 2 current ranges Voltage current channels have an additional range cal
49. s 4 8 8 Externally triggered multiple runs MODE external trigger runs Logging is started in the usual way by pressing set in the LOG function see 3 5 The logger only records when the external trigger is present Readings will be taken from each of the channels selected in whichever logging mode has been selected see 4 8 1 A new run is started whenever the external trigger is re applied and recording will stop after the 99th run or when the memory is full voltage high contacts open contacts closed time low run 1 run2 4 8 9 External triggering in a single run MODE external trigger records Logging is started in the usual way by pressing set in the LOG function see 3 5 The logger only records when the external trigger is present Readings will be taken from each of the channels selected in whichever logging mode has been selected see 4 8 1 However a new run is not started when the external trigger is re applied and therefore a complete record of all externally triggered readings will be recorded in only one run This will be of value if you need to analyse these triggered events on one time axis The time channel is selected automatically to log the time between recordings Whenever the trigger is removed a final dummy recording is made and then recording stops If no trigger is applied during any 18 hour period a ummyoor Gonfidencedrecording is made 4 8 10 Wiring up for external tri
50. sampling interval the following will be displayed og 12 00 00 INTERVALS The logger will then automatically select a sampling interval of 1 second for logging intervals up to and including 12 hours INT log 12 sample 00 A sampling interval of 2 seconds is the minimum for logging intervals over 12 hours It is not necessary to change the sampling interval if recordings are made in non average logging modes The sampling interval will be automatically set to zero INT log 12 00 00 sample 00 00 00 Please note that the logging sampling interval cannot be changed while logging is in progress or while logging is waiting to commence INT Log 12 00 00 LOGGING 4 7 The OUTPUT function This function is used to output data to a computer using the following programs Data transfer and setup Darca Lite Data transfer and analysis Darca Plus Squirrelwise Data transfer direct remote setup and analysis Darca Plus Once you enter OUTPUT the display will clear and the datalogger will quickly enter sleep mode which is required prior to active communication The baud rate is automatically selected by the program that is used Eltek Squirrels with serial numbers 6000 and above will work at up to 38400 baud During downloading the number of blocks to be downloaded is displayed and this number changes after each successful transmission of a block While not actively communicating fidledis displayed An example of some of the displays whi
51. ser to review the maximum logged value on each channel Along with the maximum value of the channel the time at which it occurred is also stored If the same peak value occurs more than once then the time stored is that of the most recent peak To view the time at which the maximum occurred press the set button h 1 MAXIMUM c 25 03 96 11 54 The maximum on the next channel can be viewed by pressing the select button 8 2 Selecting ranges Ensure that the range selected is correct for the type of transducer connected to the input i e the 0 to 1000A CT range must not be used for a Rogowski coil and vice versa Note that AC ranges that start at 0 only achieve 0 1 accuracy at above 1 2 of scale 8 2 1 Ranges A completely new set of analogue ranges is implemented on the 1010 8 e Transducer 0 to 200A coil 0 to 500A coil 0 to 1000A coil 0 to 2000A coil 0 to 1000A CT 0 to 300V 170 to 270V Thermistor 25 0 to 125 0 C Pulse count 0 to 65 000 0 to 650 000 Digital 0 to 255 State 00000000 to 11111111 8 3 Making connections to the datalogger It is possible to connect many different types of sensors to the 1010 Squirrel Datalogger These include Rogowski coils miniature CT 1A 5A 7 5A VTS and VTP voltage transducers and air amp surface temperature sensors This is our standard range though other transducers may be available to order See section 5 7 for connection details 49 9 Squirrels with pH ch
52. stored and downloaded using mm rain as the unit mm rain will also be displayed in METER mode 4 9 4 Event digital channel Each model has at least one event digital channel This type of channel is used to log events or eight bit numbers There are eight event inputs available and set is used to select this option CH 10 11111 This shows the status of all the digital inputs Each of the eight event lines is stored either as d contacts closed voltage low or as contacts open voltage high The number 0 or 1 is called the state If you have selected to log in any of the event modes see section 4 8 6 then the last event channel will be automatically selected A typical application is the monitoring of the opening and closing of doors Another option for event channels is that the eight event inputs are displayed as a decimal number and this is selected by pressing set CH 10 state 0 255 4 10 The STAT function This function describes the following status information of the logger and is accessed by pressing select 4 10 1 Battery life indication att y STAT er 8 7 65 days b V This displays the approximate remaining life of the internal batteries in days and the current voltage level of the batteries The estimated battery life takes into account the number of channels selected and the log sample intervals The battery life figure will usually decrease if the number of channels set to log is increased and the
53. t 8 MSB Event bit 7 Event bit 6 1514131211109 Event bit 5 Event bit 4 Event bit 3 Event bit 2 Event bit 1 LSB Digital ground eae Wen Alarm output Solder view of female Relay contact 1 15 way D connector Relay contact 2 Digital ground External trigger input Spare input 1 2 3 4 5 6 7 8 9 14 2 Output connector for connection to a PC The connector marked utputd is for communications between the Squirrel and a computer for remote control and for data transfer The connections are as follows 1 2 Reserved S2 in 3 4 Serial output Digital ground 5 6 9V output Reserved S2out Solder view of male 6 pin Serial input mini DIN connector 65 There are several methods for connecting the Squirrel to the computer Directly to a serial port on the computer Directly to a USB port on the computer a serial to USB converter is required Via a landline modem Via a GSM modem see Eltek documents TU1016 and TU1017 Via Ethernet using a Moxa Nport 5110 see TU1029 14 2 1 Direct connection details For direct connection from a PC serial port to a 1000 Series Squirrel the cable LC68 is used If a serial port is not available on your PC an RS232 USB adapter can be used in conjunction with the LC68 The preferred adaptor is the NewLink USB Serial Convertor type NLUSB0039 which is available from Eltek Note Not all USB adaptors are compatible Ensure the device is installed correctly and make a
54. t for 3 seconds to change an unused voltage current channel to the default EU range N B It is essential that the sensor on time is set to 1 second or greater Please see 4 10 4 for further details 3 5 Start logging Press function until the following is displayed LOG off used 0 Now press and hold set to start logging G off LD TO START The display shows that logging has started and will turn off within 10 seconds to conserve power Some memory slots will be used up immediately in order to store the header file LOG o 1 n used 4 11 3 6 Stop logging Press function to wake up the logger LOG on used 123 Hold set to stop logging LOG on HOLD TO STOP LOG off used 123 12 4 More about the functions of the datalogger 4 1 The LOG function 4 1 1 Logging status displays Whenever function is pressed while the logger display is blank the display will indicate the logging state This indicates that logging is in progress and that 123 memory slots have been used so far LOG on used 123 Alternatively the display below indicates that logging has stopped and that 124 memory slots have been used LOG o 1 f f used 24 If the START function has been used see 0 the logger waits for a specific time and date to start logging and the following is displayed LOG waiting used 0 Alternatively this may indicate that externally triggered recording has been selected see 4 8 7 in whi
55. t is attempted the following be displayed LOG of f NO MORE RUNS Data can be downloaded at any time even during logging without loss of recordings 4 9 The CHANNEL SETUP function This is used to select the channels and set the range for each channel Each model has a specified combination of channels please consult the data sheet in Section 13 for details of your particular model Once you enter this function you will be informed of the number of channels that have currently been selected CHANNEL SETUP 9 used Pressing select will enable you to scroll through all of the channels Some of the channels may not be currently selected and these will be indicated as follows CH 5 not used Holding down the set button will allow you to set up the channel IO or Ou TO CHANGE Then each time set is pressed the display will reveal the available measuring ranges for that channel Once you have set the appropriate range for a particular channel you can at any time press select to view another channel amp setup status However if logging is in progress then it will not be possible to change the channel setup and the following will be displayed CH 3 C LOGGING If logging has stopped but there are readings stored in memory it is still not possible to change channel setup and the following is displayed 27 CH 6 EU m s CANNOT CHANGE In the instance that all channels have been de selected the log
56. the inputs from each channel selected are measured at each sample interval which is set at a shorter interval than the logging interval All the sample interval readings taken within the logging interval period are averaged This average is then recorded at each logging interval Readings from pulse count channels and event digital channels cannot be averaged and the actual values at the end of the logging interval are stored Please see section 3 2 for instructions on how to change sample intervals After any change between interval and average modes the following will be displayed as a reminder 21 4 8 4 Logging events only MODE log event The event inputs are monitored every second irrespective of log and sample intervals selected Whenever any of the eight inputs of a event digital channel change between LOW less than 0 5V DC and HIGH between 4V and 5V DC voltage levels or between contact and no contact the following occurs a the state of each of the eight event lines is recorded together with the time and date of the event b readings are also taken and stored from all other channels which have been set to log c if a pulse channel has been selected then the number of pulses accumulated since the last event will also be recorded If no event occurs during any 18 hour period then a Gummy6 or Gonfidencedrecording is made See section 4 9 4 for further details about event channels Please note that logging must be st
57. to 2 5V 0 to 10V 5 to 5V 0 to 20V 10 to 10V DC current 4 to 20mA as 0 to 100 Impedance 10 2 0 to 20mA Pulse count 0 to 65 000 Impedance 1MQ 0 to 650 000 Digital 0 to 255 State Impedance 1M2 00000000 to 11111111 63 13 2 Specification sS Eltek l h Squirrel 1000 series e g Accuracy Voltage 0 1 of reading 0 1 of span at 20 C Temperature 0 2 of reading 0 1 of span ee eae 30 to 65 C Humidity up to 95 non condensing Power hace Internal six size AA manganese alkaline batteries such as Duracell MN1500 External 9 14V DC at 100mA Battery life At least 6 months with 8 channels recording every 5 minutes Clock accuracy 1 second day at 20 C Physical Dimensions 180 mm x h 120 mm x s 60 mm or d 85 mm details depth may be greater depending on model Weight including batteries 1 kg Material ABS blue suede finish Interface RS232C at these baud rates 9600 19200 38400 RS232 Output 6 pin female mini DIN socket S O Digital inputs Pulse count event external trigger Impedance 1MQ Start low 0 to 0 5V DC or contacts closed Stop high 4 to 6V DC or contacts open 64 14 Connectivity 14 1 Signal connector The connector marked Gignaldis a 15 way male D connector It is both a digital event input and the external trigger input The connections are as follows Event bi
58. ues and old data is overwritten 2 9 CHANNEL SETUP Used to select the channels from which you require data to be recorded The range for each channel is also selected which could include engineering units if these have been set up by Darca This function also displays how many channels have been selected to record 2 10 STAT status This function displays the following status information concerning the datalogger a internal battery voltage and number of days remaining of viable battery life when logging c memory size with the ability to change memory size in 1K increments d sensor power on time up to 60 seconds before the reading is taken e date format configuration adjustable f g mains frequency filter adjustable h model number and current version of firmware temperature units thermocouple Squirrels only j network option if enabled with Darca software 3 How to start logging from the default settings 3 1 Set time date The real time and date are displayed on two lines The time is set in the format HH MM SS and the date default format is DD MM YY Press function until the display shows TIME 10 42 59 date 25 12 94 Press set and the following prompt appears TIME 10 43 11 HOLD TO CHANGE Hold set button and cursor will appear the clock will stop a o om Do ao ee Shs A N w ae 0O AN Press select to move cursor TIME 10 43 17 date 25 13 94 Press s

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