Cropico 3000 SERIES Operating instructions
Contents
1. Replace the correct value fuse according to the table 1 5 7 Replace the selection sub assembly in the inlet module Connect the power cord Microhmmeter Type DO5000 Operating Instructions 2 2 Unpacking the instrument When you unpack the DO5000 check that the following items are present before starting to use the unit 1 x DO5000 Microhmmeter 1 x Mains Cord 1 x Operating Manual 1 x Calibration Certificate 1 x LSO5 P Lead Sets Certificate Please contact the CROPICO Customer Support Team immediately if any of these items are missing or damaged Please note that we offer a wide selection of measuring leads and test fixtures see section 6 please consult our sales staff to order the items most suited to your application Microhmmeter Type DO5000 Operating Instructions 3 About the DO5000 This section introduces you to the features and functions of the DO5000 Microhmmeter 3 1 The Front Panel CROPICO MICROHMMETER DOS000 sii rT TTT TT 3 2 ON OFF Switch The On Off switch switches the DO5000 on and off During Power On the last measurement function setup is restored The rear mounted cooling fan will always run and the cooling vent must not be blocked 3 2 1 ON OFF Switch Battery Version DO5001 The Front Panel on off switches the DO5001 on and off The rear switch situated adjacent to the inlet filter switches the mains supply on off 3 3 The Function Keypad All DO5000 measurements and programmi2. Microhmmeter Type DO5000 Series Operating Instructions yA CROPICO Bracken Hill South West Industrial Estate Peterlee Co Durham SR8 2SW England Tel 44 0 191 586 3511 Fax 44 0 191 586 0227 www cropico co uk sales cropico co uk Microhmmeter Type DO5000 Operating Instructions Limited Warranty amp Limitation of Liability CROPICO guarantees this product for a period of 1 year The period of warranty will be effective at the day of delivery c Copyright 2011 All rights reserved Nothing from this edition may be multiplied or made public in any form or manner either electronically mechanically by photocopying recording or in any manner without prior written consent from CROPICO This also applies to accompanying drawings and diagrams Due to a policy of continuous development CROPICO reserves the right to alter the equipment specification and description outlined in this publication without prior notice and no part of this publication shall be deemed to be part of any contract for the equipment unless specifically referred to as an inclusion within such contract Microhmmeter Type DO5000 Operating Instructions Disposal of Old Product This product has been designed and manufactured with high quality materials and components that can be recycled and reused When the crossed out wheelie bin symbol is attached to a product it means the product is covered by the European Directive 2002 96 EC Please famil
3. AUTONI 30mQ 10 0A AVE Slow 18 000 mQ Meas Cont The keypad below the display screen controls the DO5000 Some keys perform a function directly For example 0 3mQ selects 3mQ range Other keys switch the display to configuration mode which allows you to select options through a series of menus The option menus all follow the same format The configuration mode is indicated by splitting the screen with a dashed line directly below the main reading An instruction prompt under the dashed line indicates the current menu The available menu options are displayed on the bottom row of the display as shown in figure 3 5 2 Press the corresponding function key to select an option Figure 3 5 2 Example of current mode menu AUTONI 30mQ 10 0A AVE Slow 18 000 m0 Powr I Ave Mode Mag Quit Indicates current mode Indicates menu options The lines printed on the front panel helps you to link the menu option printed on the screen with the correct key on the keypad a sm j Microhmmeter Type DO5000 Operating Instructions 3 6 About the Function keys The top row of function keys are only used to select menu options The lower row of function keys is enabled only when entering values these instances are covered later in this section Both rows of function keys are shown in figure 3 6 1 Figure 3 6 1 Function keys The Quit and OK menu options consistently use the Quit and OK key
4. 716 mQ 19 075 mQ Increase in resistance 0 1 99 3 98 5 97 To measure with the temperature compensation proceed as in 4 4 but in addition connect the temperature sensor probe see section 6 for accessories details and part numbers to the front panel socket Select the temperature compensation measurement mode as described in 4 4 Alternatively if the ambient temperature is stable a manual value may be entered in this case a temperature sensor is not required The true measured resistance value will be displayed in large digits on the DO5000 screen and the compensated value will be shown in smaller digits below the main display The measured or set temperature will also be shown Figure 5 5 1 Display screen temperature compensation mode AUTO 1 30mQ 10 04 AVE Slow TC 18 358 m0 T 25 00 C Ext RX 18 000 mQ Cu Meas Cont 23 Microhmmeter Type DO5000 Operating Instructions 5 6 Measurement with Limits The measurement limits function permits the fast easy sorting of components To select the limits function see section 4 5 Both high and low limit values may be set If the measured value is within the set limit boundaries then front panel green PASS LED will illuminate If the measured value falls outside the set limits then the red FAIL LED will light a warning beeper will also sound and the instrument display will show FAILED with chevron arrows pointing to the left for value to low and to the right
5. Microhmmeter Type DO5000 Operating Instructions 1 2 Definitions and Terminology yOmicrohmm mOmillionm kQkilohm Pt100 U U 1 1 Four terminal measurement Kelvin clips bt d Q Km Km m 0 000001 Ohm 0 001 Ohm 1000 Ohm Platinum resistance thermometer 1000 at 0 C Voltage connection Current connection Kelvin principle of measurement using 2 wires l1 12 to pass current through Rx and 2 wires P1 P2 to measure the voltage Crocodile clips with isolated jaws one side being the current connection the other voltage U connection Indicates reading compensated for 20 C Indicates resistance per Kilometre Indicates cable length in Kilometres Indicates cable length in metres Microhmmeter Type DO5000 Operating Instructions 1 3 Standard features of the DO5000 Microhmmeter include e Direct display of resistance e Illuminated display e Up to 10 Amps measuring current programmable 10 to 100 e Automatic Temperature compensation e Display hold function e Display zero function e 4000 event data logger e Statistical reporting e Measuring current reversal with auto average e Hi Lo Limits with Red Green front panel warning LEDs e Fast measuring mode 50 measurements second e General warning symbol This indicates that a hazardous condition may exist A You must read the relevant sections in this Operator s Manual before operating the instrument Display Measuring terminals Mains ON
6. OFF switch CROPICO aoue tin osaa Function keys Pt100 temperature probe input Microhmmeter Type DO5000 Operating Instructions 1 4 Principles of measurement BLANK PAGE 1 5 Specification 1 5 1 Measurement Accuracy Operating Instructions 5000 5001 Range Max Current Resolution Accuracy at full rated Temp Coefficient C current 30kQ 1004 A 1Q 0 03 Rdg 0 02 FS 10ppm Rdg 6ppm FS 3kQ 1mA 100mQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 3000 10mA 10mQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 300 100mA 1mQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 30 1A 10010 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 200mQ 10A 10uQ 0 03 Rdg 0 01 FS 20ppm Rdg 6ppm FS 30mQ 10A luQ 0 03 Rdg 0 01 FS 30ppm Rdg 6ppm FS 3mQ 10A 100nQ 0 03 Rdg 0 02 F S 30ppm Rdg 6ppm FS 5002 Range Max Current Resolution Accuracy at full rated Temp Coefficient C current 30 kQ 1001 A 10 0 03 Rdg 0 02 FS 10ppm Rdg 6ppm FS 3kQ 1mA 100mQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 300Q 10mA 10mQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 300 100mA ImQ 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 3Q 100mA 100140 0 03 Rdg 0 01 FS 10ppm Rdg 6ppm FS 200mQ 100mA 10pQ 0 03 Rdg 0 01 FS 20ppm Rdg 6ppm FS The accuracy is quoted at full rated current with auto average current mode and the display count is 30 000 plus sign and unit The 200mQ range has a scale length of 20 000 1 5 2 Programm
7. P1 P2 Connections to Stud Terminals Measurement with duplex handspikes ci eR P2 C2 22 Microhmmeter Type DO5000 Operating Instructions 5 4 Resistance measurement The DO5000 should be in the measurement STOP mode In this mode the measuring current is switched off and the current terminals are shorted internally Connect the measuring leads as described in section 5 3 before starting the measurement select the current level and mode required as described in section 4 2 WARNING the maximum measuring current is 10 Amps on the lowest 3 measuring ranges ensure that the current level selected will not damage the resistance being measured Select the range required see 4 1 or auto range To start the measurement press the MEAS button the measured resistance value will be displayed on the screen 5 5 Resistance measurement with temperature compensation Temperature compensation should be used when measuring the resistance of materials which have a high temperature coefficient Copper for example has a temperature coefficient of 0 3980 K The value of the resistance measured will therefore vary with the temperature of the copper To obtain consistent and meaningful results the resistance values may be related to a set ambient temperature normally 20 C Example Copper with a temperature coefficient of 3980ppm k 0 3980 k Temperature Resistance of Copper 18 000 mQ 18 358mQ 18
8. for value to high Figure 5 6 1 Measurement display with limits value to low AUTOILI 30mQ 10 0A AVE Slow 18 000 mQ lt lt F AILED lt lt Meas Cont Figure 5 6 2 Measurement display with limits value to high AUTOILI 30mQ 10 0A AVE Slow 18 000 mQ gt gt F AILED gt gt Meas Cont 24 Microhmmeter Type DO5000 Operating Instructions 5 7 Measurement of Inductive Devices GENERAL When the Settling algorithm is selected and the MEAS button pressed continuous measurements will be made until two consecutive results are within the selected limit or until the selected maximum number of measurements has been reached In the first case the final result will be displayed and in the second case the message MEASURMENT ERROR Failed to Settle will be displayed If appropriate the result or the error value will also be datalogged sent out on the bus and sent to the Analogue Output on the PLC card Finally if the Measurement Limits facility is selected then the PASS FAIL result will be displayed The Settling facility can be used in SLOW mode only Normally the Settling facility should be used in SINGLE trigger mode and the above description assumes this However if CONTINUOUS trigger mode is used then the operation is the same except that once the measurement has settled the settling facility is effectively disabled and the DO5000 continues to take measurements withou
9. of Use 1 5 6 Lead Resistance 1 5 7 Mains Supply 1 5 8 Battery Operation 1 5 9 Weight and Size 2 Setting up the DO5000 2 1 Safety Information 2 1 1 Mains Voltage Selection and Changing the Fuse 2 2 Unpacking the Instrument 3 About the DO5000 3 1 The Front Panel 3 2 ON OFF Switch 3 3 The Function Keypad OOOO ANNN DMOMDMDONTATAAAKRWN 3 4 Table Summary of Basic Functions 10 3 5 About the DO5000 Display Screen 12 3 6 About the DO5000 Function Keys 13 4 Setting up measurement options 14 4 1 Range Selection 14 4 2 Current Selection 14 4 3 Measurement Mode 14 4 4 Temperature Compensation 16 45 Limits 17 4 6 Data Logging Function 18 4 7 Setup Memory 18 4 8 Display Menu 19 4 9 Measure Hold Function 20 4 10 Measure Stop Function 20 4 11 Measurement Zero 10 5 Measuring with the DO5000 21 5 1 Connecting to the DO5000 21 5 2 Connecting to the Resistance to be Measured 21 5 3 Lead Connection Types 21 5 4 Resistance Measurement 23 5 5 Resistance Measurement with Temperature Compensation 23 5 6 Resistance Measurement with Limits 24 5 7 Measurement of Inductive Devices 25 6 Accessories 27 6 1 Leads 27 6 2 Wire Clamps 27 6 3 Coin Jigs 27 6 4 Interfaces 27 6 5 Temperature Probe 28 Microhmmeter Type DO5000 Operating Instructions 1 Introduction 1 1 Overview The DO5000 Microhmmeter is a high accuracy instrument designed for industrial and laboratory resistance measurements Features include e Programmable measuring curren
10. used 1 5 5 Conditions of use The instrument must be used inside in a horizontal position Temperature Storage 10 C 60 C Operation 0 C 45 C Full accuracy is achieved after 10 minutes warm up and for a relative humidity lt 50 Altitude up to 2000 metres Maximum humidity rate 80 for a temperature of 31 C 1 5 6 Lead resistance A maximum lead resistance which may be calculated as 0 50 measuring current is permissible in each of the four measuring leads The display will indicate if the current lead resistance is too high MEASURENT ERROR Current lead resistance too high 1 5 7 Mains supply Universal power inlet Maximum Power consumption 250VA 45 65Hz Nominal Voltage Voltage Range Frequency Fuse Type 115 V 103 127 V 47 63 Hz 6 3A T 230 V 207 253 V 47 63 Hz 3 15A T 1 5 8 Battery Operation DO5001 Two rechargeable sealed lead acid batteries are fitted internally together with the battery charging circuits The chargers will maintain the batteries in good condition automatically adjusting the charge rate to suit the battery state Full measurement capability is maintained whilst batteries are charging Battery Capacity Digital 11 hours continued use with display backlight on Analogue Over 6000 simple measurements in fast mode with 10A measuring current Approx 3000 measurements slow mode 1 5 9 Weight and Size Size 147 x 357 x 345 mm H W D Weight 9 8 kg DO5
11. 000 12 2 kg DO5001 8 15 kg DO5002 Microhmmeter Type DO5000 Operating Instructions 2 Setting up the DO5000 A 2 1 Safety information Please read and follow these important safety instructions A Read the safety information at the beginning of this manual before operating the DO5000 Make the necessary electrical safety connection checks In particular select the correct line voltage and make sure that the correct fuse is installed Incorrect voltage or fuse selections present both an electrical safety and a fire hazard Ensure that the rear panel fan is operating and that the vent is not blocked When connecting to an electrical supply mains supply the mains cord provided with the equipment should be used and connected only to a mains supply with a suitable earth connection Under no circumstance should the equipment be operated with earth disconnected 2 1 1 Mains voltage selection and Changing the fuse The mains inlet socket is located on the rear panel to select the correct mains voltage and to replace the fuse proceed as follows Front panel ON OFF switch in the OFF position Remove the power cord from the inlet socket With a small screwdriver remove the selection sub assembly from the inlet module Remove the fuse Take off the pale grey plastic piece Select voltage 115 for a 115 volts main and 230 for a 230 volt main Replace the grey plastic piece to display the correct voltage in the sub assembly window
12. THE SETTLING FACILITY e The Settling facility will be deselected if e Filter facility is selected e Average current mode is selected e Fast mode is selected REMOTE COMMANDS See attached extract from the Remote Interface Manual for details and an example programme 25 Microhmmeter Type DO5000 Operating Instructions OTHER ISSUES Due to inductive effects Overange Error Polarity Error Excess Resistance in Current Leads Error and Open Circuit Error will all be ignored until the final measurement If the Autorange changes the range during a measurement then the Number of Readings counter will reset to one If the measurement does not settle within the maximum number of readings then the Resistance bit Bit 9 of the Questionable Data Condition Event Registers will be set When in Manual mode a short beep will be heard when the measurement is completed or a longer beep if the measurement failed to settle 26 6 Accessories 6 1 Leads Operating Instructions The DO5000 may be used with a variety of lead sets The following are the available selection Remember if you do not see suitable leads for your application please consult our customer help desk Ordering Code Description HS01 P Duplex Handspikes with 2 5 metre lead length current and potential spikes suitable for plate or Bussbar measurements HS02 P Duplex Handspikes as a HSO1 P but with 2 5 and 15 me
13. able current The measurement current is adjustable on each resistance range as follows Range Max Current Min Current Steps 30 KQ 1001 A 10pA IA 3 kQ ImA 100A 10uA 3000 10mA 1mA 1001 A 300 100mA 10mA ImA 3Q 1A 100mA 10mA 200mQ 10A 1A 100mA 30mQ 10A 1A 100mA 3mQ 10A 1A 100mA The accuracy of current is typically 0 25 1 5 3 Accuracy against current level Range 100 Current 50 Current 10 Current 30 kQ 0 03 Rdg 0 02 ES 1 0 04 Rdg 0 02 FS 0 06 Rdg 0 02 ES 3 kQ 0 03 Rdg 0 01 ES 1 0 04 Rdg 0 01 FS 0 05 Rdg 0 01 ES 3000 0 03 Rdg 0 01 ES 1 0 04 Rdg 0 01 FS 0 05 Rdg 0 01 ES 30Q 0 03 Rdg 0 01 ES 1 0 04 Rdg 0 01 FS 1 0 05 Rdg 0 01 EFS 3Q 0 03 Rdg 0 01 ES 1 0 04 Rdg 0 01 FS 0 06 Rdg 0 01 ES 200mQ 0 03 Rdg 0 01 FS 1 0 04 Rdg 0 01 FS 0 06 Rdg 0 01 ES 30mQ 1 0 03 Rdg 0 01 FS 1 0 04 Rdg 0 01 FS 1 0 06 Rdg 0 01 EFS 3mQ 1 0 03 Rdg 0 02 FS 0 04 Rdg 0 02 FS 0 06 Rdg 0 02 FS Microhmmeter Type DO5000 Operating Instructions 1 5 4 Temperature compensation The accuracy of the temperature measurement is 0 1 and uses a standard Pt100 sensor This accuracy does not include errors due to the sensor itself The temperature measurement range is 0 40 C and the resistance measurement is referenced to 20 C when this option is
14. asurement options CURR Current selection Selects the current to be used for measurement plus single polarity or switched average Mode COMP Temperature Selects temperature compensation compensation ZERO Measurement Nulls the display at the current reading Direct display zero and displays measured values relative to from function the nulled value keypad MES Measure run hold Display hold function triggers Direct measurement and data logger cycles from keypad STOP Measure stop start Stops the current measurement and Direct disconnects the measurement current Logging Data and Statistical Displays LOG Data logging Selects the data logging and statistical Menu function analysis menu functions Options _and Configuration LIMIT Limit functions Selects Hi Lo limit menu Menu MENU Menu functions Selects interface options and calibration Menu functions Scroll and Contrast Control MENU Up command key Controls the display contrast and page Menu Display contrast scroll functions page scroll MENU Down command Controls the display contrast and page Menu key Display contrast page scroll scroll functions 11 Microhmmeter Type DO5000 Operating Instructions 3 5 About the DO5000 Display screen The liquid crystal graphic display clearly indicates the measured resistance and measurement status as well as displaying available menu options and measurement analysis when selected Figure 3 5 1 Example of Resistance Measurement Mode
15. gram 1 U U I NOTE It is important to connect the current leads outside the U potential leads 5 2 Connecting to the resistance The Digital Microhmmeter DO5000 employs a four wire method of measurement i e it is necessary to make four connections to the resistance under test The instrument is supplied with four leads two for the potential connections which are made across the test resistor at the points between which the resistance is to be determined and two for the current connections which connect the test resistor to the current supply circuit 5 2 1 Connect the red leads to the U and sockets and the black leads to the U and l sockets 5 2 2 Connect to the resistance under test as shown in figure 5 1 1 Cleanliness is important and if the sample is not clean a rub with an abrasive paper to remove oxides is recommended 5 3 It is not always possible to use the combined current and potential crocodile clips Kelvin clips in which case test leads with spade tags or special fixtures may have to be made to suit the particular application We offer a variety of different lead and fixture types which are list in section 6 1 21 Microhmmeter Ty Operating Instructions Figure 5 3 1 Diagram of different connection configurations Cl Pl P2 C2 Connection to Cable Joint Cl TFT pa Pl P2 Connections to Current Shunt Cl C2
16. iarise yourself with the appropriate local separate collection system for electrical and electronic products Please dispose of this product according to local regulations Do not dispose of this product along with normal waste material The correct disposal of this product will help prevent potential negative consequences for the environment and human health User Note These Operating Instructions are intended for the use of Competent Personnel Microhmmeter Type DO5000 Operating Instructions English Important Safety Information 10 08 99 General This instrument has been designed and tested to comply with the Electromagnetic Compatibility Directive 89 336 EEC and Low Voltage Directive 93 68EEC in accordance with EN 61010 1 1995 relating to the safety requirements for electrical equipment for measurement control and laboratory use Before connecting the instrument to the mains supply please ensure the following safety precautions have been read and understood Safety Symbols The following symbols are used to describe important safety aspects of this instrument these symbols appear on the instrument and in the operation instructions A Attention Symbol Indicates a potentially hazardous condition exists and that it is necessary for the operator to refer to the instruction manual to ensure the safe operation of this instrument Hot Surface Warning Indicates a hot surface that may be at a temperature capable of causing burns refer to
17. icrohmmeter Type DO5000 Operating Instructions 6 5 Temperature Probe For the sensing of the temperature of the sample under test Ordering Code Description 5000 Pt100 Pt100 Temperature Sensor Probe length 200mm diameter 6mm Fitted with 1 Metre Lead and DIN Plug VIEWED FROM BACK OF PLUG 28 Microhmmeter Type DO5000 Operating Instructions For Technical Support Contact Tel 44 0 191 587 8718 For Service and Calibration Contact Service Department Seaward Group Unit 11 Bracken Hill South West Industrial Estate Peterlee Co Durham SR8 2LS England Tel 44 0 191 587 8739 Fax 44 0 191 587 8737 E mail service seaward co uk CROPICO is a division of E SEAWARD GROUP 29 Microhmmeter Type DO5000 Operating Instructions Additional Products From Cropico DIGITAL OHMMETERS RESISTANCE BRIDGES RESISTANCE DECADE BOXES RESISTANCE STANDARDS DIGITAL THERMOMETERS THERMOCOUPLE SIMULATORS PT100 SIMULATORS INSULATION TEST SETS UNIVERSAL CALIBRATORS HIPOT TESTERS ELECTRICAL SAFETY TESTERS YACROPICO Phone fax or e mail for further information on the above or for a copy of our general catalogue Phone 44 0 191 5863511 Fax 44 0 191 5860227 E mail sales cropico com Website www cropico com 30 610018 Rev 11
18. ion to select whether the conductors are in series Ser or parallel Par is available Press OK to confirm Once these parameters are set the measured value will display in Q Km for any number of conductors 1 99 in series or parallel To display the cable length in Km select MODE Km the display reads 1 cable of 1Km in series Change No Len Unit Conn To change the number of conductors select No the display will ask you to enter the number 1 99 Enter the number and press OK Select Res and you will be prompted to enter the resistance of the cable in ohm Km enter the value and press OK To change the units press Unit you can now select Km or m Press OK to confirm selection To change the connection configuration select Conn and the option to select the conductors in series or parallel again press OK to confirm Once the configuration is complete press Quit to return to the measurement screen which will display the measured cable length in Km or m Press Trig Mode To select continuous measurement press Cont or Sing to select a single measurement this completes one measurement and holds the value on the display To trigger a new measurement the direct function key MEAS should be pressed Press Read Rate to select Fast or Slow measurement mode With Fast mode selected the DO5000 will measure at 50 measurements per second This mode is intended for automatic measurements using o
19. mits menu Select Alm to turn the audio alarm Beeper on or off Select Max to set the max or upper limit value press Chg and the screen will prompt you to select the units mO O kQ Select the required units and the display will ask for a new max limit value to be entered Use the numbered keypad to enter the required limit press OK to confirm Select Min to set Min or lower limit value proceed as for setting max limit The Green Pass front panel LED will light when the measured value is correct and within the set limits the Red Fail LED will light and the warning beeper will sound if the measured value is higher than the Max limit set or lower than the Min limit set The DO5000 screen will also display PASS or FAILED with gt gt to show value to high and lt lt to show value to low Figure 4 5 1 Measurement screen with limits AUTOILI 30mQ 10 0A AVE Slow 18 000 mQ lt lt F AILED lt lt Meas Cont To select the open circuit voltage limit from the Lim menu select O C the option of selecting either 20mV of 50mV limit is then available The measurement display will indicate in the top right hand corner which limit has been set 17 Microhmmeter Type DO5000 Operating Instructions 4 6 Data Logging Function Press LOG to select the data logging menu Select New to initiate a new log the screen will prompt you to clear the current log Press Yes the screen will ask you confirm press yes again and the c
20. ne of the interfaces to output the measured values or control an external process The measured value will be displayed in small text on the screen when Fast measurement mode is used 15 Microhmmeter Type DO5000 Operating Instructions For manual operation the Slow measurement mode should be selected This will read at 2 measurements per second and offer the highest accuracy and resolution Press Filt to select the digital filter this feature should be used when the sample to be measured is unstable and the measured value displayed is constantly changing The filter is a rolling average of n measurements where n may be set between 1 and 32 Press Sett to select the setting time filter this would normally be used when measuring inductive samples such as motor winding resistance Press Limit to set maximum number of permissible digits 1 999 that the reading can change Press No of readings to select the number of readings 2 999 that the set limit must conform to 4 4 Temperature Compensation Press Mode to select the setup menu for temperature compensation Press Ext to select the external temperature sensor Press Man to select the manual compensation temperature the display will request that you enter the ambient reference temperature Press Cu to select compensation for copper 3930 ppm C Press Al to select compensation for Aluminum 4100 ppm C Press Usr to enter alternative user coefficients The equation
21. ng facilities are accessed through the function keypad A brief description of key functions is given in the following table For a detailed description of how to use the keys to configure and operate the DO5000 refer to section 4 Operating Instructions 3 4 Table Summary of basic functions 10 Key Direct Symbol Description Function function or menu Selection of Range 3mQ Selects 3mQ range Selects and displays the measured value Direct using the 3mQ range from keypad 30mQ Selects 30mQ Selects and displays the measured value Direct range using the 30mQ range from keypad 200mQ Selects 200mQ Selects and displays the measured value Direct range using the 200mQ range from keypad 32 Selects 3Q range Selects and displays the measured value Direct using the 3Q range from keypad 300 Selects 30Q range Selects and displays the measured value Direct using the 300 range from keypad 3000 Selects 3000 range Selects and displays the measured value Direct using the 300Q range from keypad 3kQ Selects 3kQ range Selects and displays the measured value Direct using the 3kQ range from keypad 30kQ Selects 30kQ range Selects and displays the measured value Direct using the 30kQ range from keypad Auto selects autorange The instrument will select the optimum Direct range required and display the measured from value keypad Operating Instructions Setting up me
22. onal hazards do not perform any unauthorised modification or install substitute parts to the instrument Only fuses with the rated current voltage and specified type should be used failure to do so may cause an electric shock or fire hazard Return the instrument to Automatic Systems Laboratories for service and repair to ensure the safety features are maintained Do Not Operate in either Damp or Explosive Environments This instrument is not designed to operate while wet in an environment of condensing humidity or in the presence of flammable gases or vapours The operation of this instrument in such an environment constitutes a safety hazard Certification CROPICO certifies that this product met its published specifications at the time of shipment from our factory All calibration measurements performed in the manufacture of this instrument are traceable to the National Physical Laboratory London Assistance For after sales support and product service assistance please contact CROPICO Customer Support Group Contact information is provided in the operation instruction manual Microhmmeter Type DO5000 Operating Instructions Table of Contents 1 Introduction 1 1 Overview 1 2 Definitions and Terminology 1 3 Standard Features of the DO5000 1 4 Principles of Measurement 15 Specification 1 5 1 Measurement Accuracy 1 5 2 Programmable Current 1 5 3 Measurement Accuracy with Current Levels 1 5 4 Temperature Compensation 1 5 5 Conditions
23. rrent direction l or Ave Ave automatically switches the current in the positive and negative directions and displays the average this eliminates errors due to thermal emf Select the current Magnitude Mag Press Chng and you will be asked to enter the maximum current as a percentage 10 100 Enter the percentage required using the keys which are numbered in the top right hand corner press OK to confirm The current value for the range selected is displayed at the top center of the screen The percentage of maximum current set will be applied to all subsequent measurement ranges selected 4 3 Measurement Mode Press MODE to select the measurement mode options Display Trig Read Q OKm Km Mode Rate Filt Sett Quit For the greatest flexibility and versatility of measurement the DO5000 has many advanced features which can be selected from this menu 14 Microhmmeter Type DO5000 Operating Instructions Display The main value display can be set to read Q QAkm or Km From the measurement MODE screen select Q Km this display will read 1 cable of 1Km in series Change No Len Unit Conn Quit OK Select No Display will ask you to enter the number of conductors 1 99 enter the number and press OK Select Len the display will prompt you to enter the cable length enter value Km To select the units to be displayed select Unit metre or Km can be selected Finally select Conn and the opt
24. s Use the Quit key to leave a menu or return to the Resistance Measurement mode screen Use the OK key to confirm a particular choice and continue to the next set of menu options Nat all function keys are used to access the Configuration Mode Some just invoke the function which is printed on the key For example pressing ZERO immediately sets the measured value displayed to zero The rest of this section describes each key in detail and gives examples of how to configure the measurement to your requirements The last used set up conditions are stored when the instrument is turned off and restored upon switch on 13 Microhmmeter Type DO5000 Operating Instructions 4 Setting up Measurement Options Note It is possible to reset the instrument to the original default start up conditions From the MENU mode press RESET to restore defaults 4 1 Range Selection Two modes of range selection are possible Manual and Auto range The 8 ranges may be selected individually by pressing the appropriate range key The range selected is indicated on the top left hand side of the display Auto range is selected using AUTO key This key toggles the selected function as follows AUTO1 auto ranges starting with the highest range AUTO2 auto ranges starting with the current range selected Range manual range is selected 4 2 Current Selection Press CURR selects the current configuration menu I I Ave Mag Quit Select the cu
25. s stored 10 4 8 Display Menu Press MENU to select the display menu Press RESET to reset measurement configuration to default values Press MEM to select memory menu Press LCD to select LCD display menu Press to turn backlight ON or OFF Press and hold to lighten then display contrast Press and hold O to darken the display contrast Press Set Up to select the configuration menu Beep turns the beeper on and off Time Date enables the current time and date to be set Lang enables the display to be toggled between English and French language Temp Unit permits the temperature units to be switched between C and F Line Freq allows the measurements to be synchronized at 50Hz or 60Hz and should be set in accordance with mains supply frequency used this is particularly important when measuring in fast mode Press Ver to display the model number and software version Press Rem I F to select the remote interface option menu Press Key Lock to select the option of locking the keyboard to ensure no parameters are changed without authorisation You will be asked to enter a pass code before you can enter this menu The default pass code is 9252 and this can be changed once you have entered the Key Lock menu Three options are available ALL enables all keys and permits normal control of the DO5000 MEM permits operation of the Memory Recall and Measure Keys only Measure restricts operation to the Mea
26. sure Key only Once the Key Lock facility is enabled the measurement screen will display a small padlock symbol in the bottom right hand corner 19 Microhmmeter Type DO5000 Operating Instructions 4 9 Measure Hold function Press Mes to hold the measured value on the display NOTE this does not interrupt the measuring current which will still be flowing through the resistance being measured WARNING when measuring with 10 Amps measuring current it is possible to produce small sparks at the current terminals Press Mes to resume display of measured values 4 10 Measure Stop Function Press STOP to stop the measurement this disconnects the current from the terminals and internally shorts the current terminals discharging any voltage that may be stored in capacitive samples 4 11 ZERO Function Press ZERO to null the current display reading to zero all subsequent measurements will be relative to the nulled value Pressing ZERO again cancels the zero Changing range or selecting auto range also cancels the zero 20 Microhmmeter Type DO5000 Operating Instructions 5 Measuring with the DO5000 5 1 Connecting to the DO5000 The DO5000 uses a four terminal method of measurement which eliminates errors due to lead resistance The measuring leads plug into the four front panel safety sockets The sockets are marked U U l amp l Connections to the resistance to be measured should be as per Figure 5 1 1 Figure 5 1 1 Connection dia
27. t interrupting the current until STOP is pressed When MEAS is pressed again the Settling facility will be re engaged MENU ACCESS The menu is accessed by pressing MODE followed by Sett From this point the following parameters can be set On Off Selects Deselects the Settling Algorithm No Rdgs Selects the maximum number of readings to be taken 2 999 This will give a maximum measurement time of approximately 8 minutes Limit Selects the maximum number of display digits by which the two consecutive readings may differ for the measurement to be defined as settled 1 999 When the facility is selected the word Sett xxx will appear in the top right corner of the screen xxx shows the maximum number of readings to be taken but during a measurement it counts the number of readings taken when the measurement settled Sett will flash during measurement Note that if CONTINUOUS trigger mode is used then the counter will freeze at the number when the measurement settled even though measurements will continue EFFECT ON OTHER PARAMETERS e Selecting the Settling facility will e Cause the Autorange to change range in a downward direction only Therefore only Auto1 autorange mode should normally be used e Deselect the Filter facility e Change Average current mode to Positive current mode e Cause an error message if in Fast mode PARAMETERS WHICH WILL DESELECT
28. t user selectable in 100 steps e Automatic temperature Compensation e Hi Lo Limits with red green front panel warning Pass Fail lamps e Switched current mode with automatic averaging ensures elimination of thermal emf errors e Large graphic LCD display for resistance measurement values as well as configuration settings and statistical results e Advanced functions include data logging and statistical reporting with max min average values peak to peak values and standard deviation e Analogue output IEEE 488 and RS232 communication and PLC interfaces available for automated monitoring and controlling applications e Fast mode 50 measurements second for production testing The DO5000 is a true four wire measuring instrument eliminating the need to compensate for lead resistance The measured value is displayed in large characters with decimal point and units KO QO or mQ For maximum accuracy the measuring current may be automatically reversed and the average of measurement displayed For measurements on unstable samples a rolling average filter is available Resistance measurement accuracy is typically 0 03 1 year specification and the value may be displayed with or without temperature compensation the final accuracy depends upon the current selected The front panel measurement connections are made via 4mm sockets located on the front panel The connection to a Pt100 temperature sensor is made with a standard DIN connector
29. the instruction manual for further safety information Caution Risk of Electric Shock Indicates hazardous voltages may be present refer to the instruction manual for further safety information Protective Conductor Terminal For protection against electrical shock during a fault condition This symbol is used to indicate terminals that must be connected to electrical ground before operating equipment IF e D Summary of Safety Precautions The following general safety precautions must be observed while operating or servicing this instrument Failure to comply with these precautions may result in personnel injury or death Instrument Electrical Earth This instrument is designed as a Class 1 electrical safety insulation device To ensure continued protection from electric shock the instrument chassis must be connected to an electrical ground The instrument is supplied with an AC power cable with an earth connection Live Circuits Danger Do not connect the power supply to or operate this instrument with the protective covers removed Component replacement and internal adjustments must be made by qualified service personnel Do not replace components with the power cable connected Under certain conditions dangerous voltages may exist with the power cable removed To avoid injuries always disconnect power and discharge circuits before touching them Do Not Modify this Instrument or Substitute Parts Because of the danger of introducing additi
30. to 10 measurement configurations to be setup and stored the DO5000 has 10 memories to store and recall these configurations Press MENU Press Mem to select memory menu Press STOR to store the current measurement setup you will be prompted to enter a memory store number 0 to 9 selecting the store number saves the current setup to that store number Press RCL to recall a previously stored setup you will be prompted to enter the memory store number that you wish to recall entering that store number recalls the stored configuration for immediate use Press List to display a list of memories in current use Press CLR to clear a previously stored configuration you will be prompted to enter the store number entering the number will erase the stored parameters from that memory 18 Microhmmeter Type DO5000 Operating Instructions The following parameters will be stored when saved to memory PARAMETER DEFAULT VALUE Range 30kOhm range Auto range on auto 1 Current direction positive Current Magnitude 100 Current mode DC Trigger mode continuous Reading rate slow Temperature compensation off Temperature compensation mode manual Temperature compensation material copper Manual compensation temperature 20 C Filter off Filter No of readings 10 Measurement limits off Measurement limits alarm on Measurement limit maximum 30 kOhm Measurement limit minimum 0 Open circuit limit off Log mode off Log mode No of reading
31. tre lead lengths LS03 P Large Kelvin clips with 3 metre lead length suitable for attaching to rods bars or cables up to 38mm diameter LS04 P As LS03 P but with lead lengths 3 and 15 metres LS05 LS06 P Executive lead set consisting of 4 x 1 metre leads with banana plugs 4 x crocodile clips 4 x test prods and 4 x Kelvin clips KC1 jaw opening 4mm Kelvin lead set comprising of miniature Kelvin clips KC2 with 1 meter leads attached terminated with banana plugs Jaw opening 6mm Suitable for fine wires 6 2 Wire Clamps For the precise measurement of 1 meter cable samples we offer 2 wire clamp options Description 1 metre wire clamp with metal base and provision for temperature sensor suitable for wire cross section 1 to 100mm C02a 1 metre wire clamp with metal base and provision for temperature sensor suitable for wire cross section 0 to 1000mm CO3 1 metre wire clamp with water bath for the precise measurement of 1 meter cable samples 1 to 1000mm 6 3 Coin Jig For the measurement of bi metal coins to ensure the resistance of the two metals is within pre defined limits Ordering Code Description CJO1 COIN JIG will accept all bi Metal Coins 6 4 Interfaces for the Remote Control of DO5000 Ordering Code Description DO5000 GPIB Talk Listen IEEE 488 Interface DO5000 PLC PLC Interface includes Analogue Output and Potential free Contacts for Hi Lo limits 27 M
32. urrent log will be cleared of all stored values You are now ready to set up the new log Press No Rdgs the current number of readings is displayed to accept that value press Yes to store a different number press No you will then be asked to enter the value of the number of readings to be stored in the log Enter the number required between 1 and 4000 and press OK Press Rev to review the current readings stored in the log these will be displayed in table form as shown in Figure 4 6 1 Figure 4 6 1 Data Logging Screen Log Range Resistance Date Time 1 30kQ 0 000 10 08 99 14 10 35 2 30kQ 0 000 10 08 99 14 10 37 3 30kQ 0 000 10 08 99 14 10 38 4 30kQ 0 000 10 08 99 14 10 40 5 30kQ 0 000 10 08 99 14 10 42 6 30kQ 0 000 10 08 99 14 10 44 Once the logging mode has been switched ON the measurement display will be in HOLD mode and the bottom line of information text will show the total number of samples to be stored and the number of measurements already stored Samples 40 40 To start the logging press the MES key the measurements will start and the values stored Once the set number of values has been stored in the log the measurements will be stopped Press Stats to display the statistical analysis of the values stored in the log The following values will be computed and displayed Minimum value Min Maximum value Max Mean value Mean Peak to Peak value PtP Standard Deviation SD 4 7 Setup Memory To enable up
33. used to calculate the corrected resistance is Re 20 C Rx 1 tx 20 C where Rc resistance corrected for a reference temperature 20 C Average temperature coefficient tx Component temperature at time of the measurement The temperature compensation mode should be used when measurements are required to be referenced to 20 C This is particularly useful when measuring materials with a high temperature coefficient such as copper as the ambient temperature varies so will the resistance value being measured Using the temperature compensation mode references all values back to a temperature of 20 C The compensated resistance value measured will be displayed in large digits in the centre of the display and the true resistance will be displayed in smaller text below The ohms sign of the compensated value will show a 20 in the centre to indicate that the value is referenced to 20 C 16 Microhmmeter Type DO500 Operating Instructions Figure 4 4 1 Measurement screen with temperature compensation AUTOI 30m0O 10 0A AVE Slow T 22 00 C Ext 18 010 mQ Cu Meas Cont 4 5 Limits Press Lim To select the Limits menu Two options are then available Meas which enables limits to be set with reference to the measured values or O C which enables the open circuit voltage to be limited to either 20mV or 50 mV Note Open circuit limits are not available on 3K x 30K ranges Select Meas to select the measurement li
Download Pdf Manuals
Related Search