Manual SD021.indd
Contents
1. MANUAL 50021 HANDHELD INSTRUMENT FOR CO2 MEASUREMENT made to measure MANUAL CONTENT HANDHELD INSTRUMENT FOR CO2 1 ONT EN Escuintla are ehe 3 T GENERAL DESCRIPTION na ae A 2 FUNCTION DESCRIPTION en ee A 3 DEFAULT PUSH BUTTON FUNCTIONS 5 4 INSTANTANEOUS CO 6 5 TEMPERATURE seen ee ee 6 6 CHARGING OF BATTERY 6 7 SELF DIAGNOSTICS AND 7 LOGGING CO AND 7 9 USER INTERFACE PROGRAM UIP P 8 10 FILE HANDLING amp APPLICATION 10 11 TECHNICAL SPECIFICATIONS man a 12 12 DATA SOON sore 13 MANUAL 1 GENERAL DESCRIPTION The SDO21 portable sensor is a light weight CO2 instrument with a digital display designed to measure the carbon dioxide concentration in ambient air The display shows the current carbon dioxide concentration and temperature Built in data logging for both CO2 and temperature makes it perfect for worksite investigations The gold plated carbon dioxide sensor measures the carbon dioxide concentration in ppm2. handelskade 76 2280 cc rijswijk the netherlands p o box 1111 2288 bg rijswijk the netherlands tel 31 70 3070703 fax 31 70 3070938 info acin nl www acin nl made to measure instrumenten bv
3. State of the art non dispersive infrared technology and automatic calibration functions have resulted in great reliability accuracy and long term stability of operation The battery capacity is more than 12 hours 2 FUNCTION DESCRIPTION The instrument is durable but can be extra secured by a safety strap on the top The measuring sensor is inside the unit Two openings in the housing make the air circulate through the unit These Openings must be kept open Please note Whenever you go from a cold to a warm environment there is a risk of condensation anyone with glasses has noticed it To avoid that this influences the accuracy of the instrument it is important to allow it to adjust to the environment for a few minutes before usage figure 1 figure 2 The flow throught the unit Front panel On Off and Function button A CO concentration in ppm Temperature in Celsius can VA be reconfigured from PC to Fahrenheit status indicator Red Led High Alarm 9000 ppm CO a 88 8 2nd Yellow Led Low Alarm 2000 ppm CO 2nd Green Led 1st Yellow Led 600 ppm CO 1000 ppm The display shows the instantaneous CO2 value and temperature The instantaneous CO2 value is also easily overviewed with the front panel LEDs 1st Green Led Always activated in On or Sleep Mode Note If the status indicator is shown the readings are not reliable The actions to take are then always first to charge the b
4. icon lits continuously The SDO21 unit automatically stops charging when the battery is fully charged The charging time for a completely discharged battery is 4 1 hours and the battery capacity is more than 12 hours figure 3 Connections Calibration Gas Inlet DC Adapter Communication Port MANUAL 7 SELF DIAGNOSTICS AND CALIBRATION The 50021 is basically maintenance free The system contains complete self diagnostics executed automatically every time the power is turned on The unit will then perform a full self test sequence showing the LEDs response for the turn on set points SDO21 is working with continuous self diag nostics during operation On Mode If any error is detected then the Status Indicator Segment will be lit The sensor has an automatic calibration function to secure long term accuracy It s called Automatic Baseline Calibration ABC implemented to eliminate any zero point drift of the infrared sensor ABC calibration cycles are performed in 4 hours intervals During some minutes of that time fresh air CO2 concentration between 380 420 ppm has to be present ABC function is only active in CALb Mode after one hour delay and requires 1 to 5 hours to perform one calibration adjustment Each such adjustment is limited to a calibration tuning of about 130 ppm CO2 Several consecu tive adjustments might be performed if required for each additional 4 hours period stay in CALb Mode T
5. of recorded data resets to zero as is the case if manually setting 50021 in Off Mode without battery charger connected The old data still remains however until new recordings eventually overwrite it After a power up such lost data may be recovered by selecting Update with the right mouse button UIP P SenseAir 00 04 39 C0 Temperature 3 minutes 6 seconds 3 minutes 6 seconds figure 7 Recovery memory dump of yesterday s recording Figure 6 using Update with right mouse click The arrow points at a data discontinuity indicating the memory position of the sample counter just before the power was lost MANUAL 10 FILE HANDLING amp APPLICATION FILES Together with a communication cable accessory and the user interface program UIP P it is pos sible to select from a directory and load different application files into SDO21 An application file will customize the unit for a certain professional application Typically the application file adds to the default unit some mathematic algorithm that will be executed by the push button when the unit is in On Mode Also the display options will be enhanced and include the result of this extra function 50021 plans to build up with time a library of different such application files These files are free and are included in the UIP_P software package which can be downloaded from SD021 s web site www SD
6. 021 com You are welcome to suggest new and suitable applications for this library by contacting your distributor To load an application file from the library into the unit proceed as follows e Connect the cable and start the UIP_P software to establish the PC connection e You might want to save the existing unit configuration for future restoration If so select main menu File Save settings to file and select some appropriate file name e Select the main menu File Load settings from file and select the application file of interest e When the file has been loaded onto the PC screen you might want to edit the default display configuration and select SI or English US units this is the time to do it e When you have made your selections you must click on Send to sensor e Exit the software when finished and turn off the sensor power with no battery charger con nected After power up the unit has its new operation functionality You are free to reconfigure back and forth as much as you like but to be sure of correct operation you must completely power down the monitor before operating with a new application configuration Save Load backup file are two other file options available from UIP_P These options will store re call exact copies of one and the same unit at a certain time including calibration parameters in ad dition to the exact configuration The unit serial number is used as a locking par
7. O2 and temperature by 896 samples Logger resets in Off Mode Windows 95 98 NT compatible software to define personal user preferences support sensor calibrations transfer and save logged data view trend curves of logged data 6VDC 700 mAh with NOKIA type miniature connector 3 6 VDC 1350 mAh Li ion accumulator gt 12 h capacity lt 55 mA in normal mode EMC Directive 89 336 EEC 20 to 70 C 0 to 50 0 to 95 RH non Condensing gt 15 years gt 3 years complete power sensor internal checks LCD triangle icon maintenance call lt 30 sec full specs lt 15 minutes ABS PC blend 123X52 X 32 MM 135g MANUAL ACCESSORIES Accessories includes monitor with internal battery protective casing communication cable wall plug battery charger Optional accessories art no PC communication cable A232 0740 Battery charger A 0741 charger for car use 12V Extra battery charger A 0740 charger Replacement battery 1PSC340848 1350 Extra protection case 0741 bag 12 DATA SDO21 o serialnumber nn nun nun delivered to company ao CONTact perso iria ico Teer ades O 6 telephone _ __ raise Small 0 eo rocio AA O A lada ia Return adress for maintenance De Bruyn Kopsstraat 5 2288 EC Rijswijk The Netherlands 13 MANUAL 14 MANUAL acin instrumenten bv
8. ameter preventing the file to be loaded into any other monitor with a different serial number Current application file library SD021 Application File standard File name 00003 50021 std set Description The standard setting as described in this user manual The push button only triggers the backlight 10 MANUAL SD021 Application File Ventilation Rate File name 00256 50021 Vent rate set Description This application is intended for building owners health care and energy savings con sultants providing a convenient tool for the investigation of fresh air ventilation rates in buildings occupied by humans The extra function provided is that the 50021 unit calculates and displays the fresh air Ventilation Rates based on the difference between indoor and outdoor CO2 levels The unit assumes that a steady state condition is present with ventilation balance between CO2 generated by the tenants inside the space and fresh air provided by the total ventilation system The unit further assumes a tenant activity level of 1 2 MET units which equals to a CO generation rate of 0 30 litres minute typical office labour activity The 50021 user is advised to first measure the outdoor CO2 value and store this value into the unit by pressing the push button The text rEAd acknowledges the sampling of the outdoors CO2 value Steady state formula used for fresh air Ventilation Rates SI metric units Ventilation rate in l
9. attery second to recalibrate the CO2 sensor zero point put the unit in CALb Mode If still the status indicator is shown after these two actions please contact your dealer MANUAL 3 DEFAULT PUSH BUTTON FUNCTIONS On Mode measuring CO2 measuring temperature logger active ABC algorithm disabled Power Off e logger resets and the sample counter will be lost CALb Mode e logger on hold e ABC algorithm enabled Back light amp Application Function Execution Push te button until the display shows tESt then release the button The unit will perform a full self test sequence showing the LEDs response for the alarm set points After the test the unit is in On Mode Off Mode Explanation Push Button Release Button From On Mode push the button until all front panel LEDs are turned off While pushing the button the unit will pass through the mode CALb If you accidentally release the button too ear ly just push the button one to reach On Mode and try again CALb Off Mode From On Mode push the button until the display shows CALb then release the button This will activate the Automatic Cali bration ABS that requirers 5 hours to complete one calibration cycle The instrument continues to execute calibrations every four hours as long as it is left in CALb Mode Intended for over night charging in fresh air with minor calibration adjustment automatically performed To get back to the On Mode just p
10. he CALb Mode is intended for overnight charging in an area with good ventilation or close to the fresh air inlet 8 LOGGING CO AND TEMPERATURE 50021 continuously logs the CO2 and temperature values To use this feature PC and a special serial cable is required together with the SDO21 freeware UIP_P available at www SD021 com This is useful for example when you are investigating ventilation systems or doing worksite inves tigations over several days Each ofthe two parameters can be logged up to 896 samples in a FIFO memory first in first out The default sampling interval is 10 minutes which results in more than 6 days and nights of recording time If the unit is turned on for a longer period old data gets eventually over written keeping the records of the last recorded 896 data samples Depending on selected sample interval you can make longer or shorter investigations over time The logger is always active in On Mode To reset the logger just switch off the unit without any battery charger connected and turn it on again That will force the sample counter to start from zero In CALb the logger function is kept on hold This is useful when you want to take a pause in meas uring for example if you are doing a worksite investigation and have to leave the area for some period When the unit is switched back into On Mode it will resume the started recording period Switching the unit into OFF Mode with the battery charger co
11. itres second person Ventilation rate 5000 CO CO 21 2Outside English US units Ventilation rate in CFM per person cubic feet of air per minute per person Ventilation rate 5000 CO 2 x2 12 2Inside Outside The ventilation rate can be displayed in SI units litres second person or in English US units CFM per person as selected from the LCD map in the UIP P software To use the Ventilation Rate function The upper and lower parts of the display toggles between two sets of readings the current ambient CO2 level and temperature during one half period of time and the outdoor CO2 level sample and the calculated fresh air ventilation rate during the next half period The ventilation rate displayed however will have no meaning until you have sampled a relevant outdoor CO level and entered a building The procedure is 1 With the SD021 in On Mode first put the 0021 in the reference media CO2Outside and wait until the readings has stabilized Press the button until the display acknowledges rEAd indi cating that the sensor has now sampled the outdoor CO level 2 Place 0021 in the space you want to study CO2Inside and wait until the reading has stabi lized before you make notes on the ventilation rate Be aware not to contaminate the monitor readings by your own exhale 11 CIN MANUAL 11 TECHNICAL SPECIFICATIONS SPECIFICATIONS CARBON DIOXIDE MEASUREMENT Operating Princi
12. nnected until switched back into ON Mode again will also pause and resume the data logging It s preferred to start a logging period with a fully loaded battery and avoid charging Charging the battery generates extra heat inside 50021 that will interfere with the temperature measurements Please remember Putting SDO21 in Off Mode without any battery charger connected will reset to zero the sample counter from the previous logged data The data tself remains however until new recordings eventually over write it C MANUAL 9 USER INTERFACE PROGRAM UIP P UIP P is a freeware and can be downloaded from www SD021 se Together with a serial communi cation cable art no A232 0740 offered as accessory you can connect the 50021 unit to a PC for functional reconfigurations of the unit for sensor maintenance and to do data extractions from the internal data logger This data communication can be performed in OFF Mode during battery charg ing as well as during normal operation in ON or CALb Modes with or without any battery charger connected E02 _ feo Tempera 9 an figure 4 LED set points and LCD configuration options available in the user interface program UIP P 50021 Customizations User Preferences Maintenance UIP P is a PC software tool that gives access to a number of different maintenance and configura tion options lt provides a number of functions to customize the u
13. ple Gas Sampling Mode Response Time 1 e Measurement Range Extended Range Accuracy at NTP 25 C Pressure Dependence Automatic Background Calibration LEDs Numerical Liquid Crystal Display TEMPERATURE Operating Principle Measurement Range Accuracy LOGGER AND SOFTWARE Digital Interface Internal Data Logger PC software ELECTRICAL Battery Charger Input Internal Battery Battery Current Consumption GENERAL PERFORMANCE Compliance with Storage Temperature Range Operating Temperature Range Operating Humidity Range Sensor Life Expectancy Battery Life Expectancy Self diagnostics Status Indicator Power up Time Housing Material Dimensions L x W x D Total Weight 12 Non dispersive infrared NDIR with gold plated optical cell Diffusion 2 min diffusion time amp 15 sec at 0 2 litre min gas flow 0 6000 ppm 6000 10 000ppm accuracy not specified 3 of reading or 20 ppm whichever is greater 1 6 reading increase per kPa deviation from normal pressure Automatic Background Calibration with fresh air Can be done together with charging during the night 5 stages green green yellow yellow red LED bar graph displaying current CO2 concentration Simultaneous display of the current CO temperature ventilation rates user configuration Thermistor 0 50 C 0 5 C provided that the battery charger is not connected and the unit USB connector with sensor UART RS232 COM driver Logging of C
14. ser application e Configure the trigger levels for the five LEDs e Customize display Which parameters shall be visible for the user e Select display readings in Sl or English US units e Save and load application and customized files e Make CO2 and temperature sensor calibrations u UIP P SenseAn Calibrate figure 5 Calibration options provided by UIP P MANUAL 50021 internal data logger The internal data logger is active in On Mode ern a a and resets in Off Mode resets only if battery charger is not connected All samples taken during the turn on time max 896 samples can be viewed with the User Interface Program UIP P From UIP P it is also possible to save all data in a PC text file for storage or further data process ing for instance in EXCEL or any other spread sheet software figure 6 Figure 6 shows an example of a 46 hours recording extracted from the SDO21 unit using UIP P Note the influence on temperature readings from battery charging as the charger was connected during the first 22 hours This graph also shows that the unit was fully functioning without any power con nected over the last 24 hours twice the rated portable operation time Selecting Update in the UIP P Logger history map will only display data up to the time position of the sample counter If battery operating time exceeds the unit will automatically switch off and the sample counter from the previous session
15. ush the button once CALb Can be turned on temporarily by pushing the button The backlight is turned off after 8 16 seconds Application function for standard default setting is just backlight MANUAL 4 INSTANTANEOUS CO CONCENTRATION The instantaneous CO2 concentration is shown in the upper part of the display A rough picture of the CO2 concentration is also given by the five LEDs found below the display LED indicator functions factory settings Green 1 always lit when the unit is on Green 2 gt 600 ppm Yellow 1 gt 1000 ppm Yellow 2 gt 2000 ppm Red 2 gt 5000 ppm 5 TEMPERATURE Temperature is presented in Celsius but can be reconfigured from PC to be in Fahrenheit To meas ure an accurate reading in ambient air the unit should be hanging in the safety strap That orienta tion minimizes interference from internal heat sources The sensor may take some half an hour to reach thermal equilibrium and accurate readings Note Charging the unit will result in a temperature rise inside the unit that disturbs the temperature measurement 6 CHARGING OF BATTERY Charging of the battery can be done with the unit in Off CALb or On Mode The electronic circuitry gets activated by charging also in Off Mode but will return to initial state when disconnected When the DC adapter is connected the charging of the battery is indicated by the rolling battery icon When the battery is fully charged the battery
Download Pdf Manuals
Related Search