User`s Manual - Reliability Direct, Inc.
Contents
1. 33 Ver 1 4 4 00 4 Thermocouple Checker 41233J K Note When using the white copper calibration cable maximum accuracy is achieved when both calibrator and unit being calibrated have similar internal temperatures 4 1 Features OQ Four check points in both degree C and F Push button range selector switch for one hand operation Bright red LEDs indicate simulation points and low battery power 4 2 General Description The thermocouple checker is a handheld battery operated device that provides a convenient simulation of Type J or K thermocouples for testing and calibrating instruments 4 3 Specifications Accuracy 0 25 1 C or 1 8 F at 23 0 C 1 0 C Check points Type J Type K 32 F 0 C 32 F 0 C 212 F 100 C 212 F 100 C 392 F 200 C 932 F 500 C 752 F 400 C 1832 F 1000 C 4 4 Operation Plug one end of the 60 coiled calibration cable into the checker and attach the other connector to the device under test Make sure the plug is inserted with the proper polarity Using the Calibrator s push button select the desired calibration point and check the response of the device under test If the device under test responds within specification then it can be considered in proper calibration If the device under test does not respond within specification calibration is required 5 CALIBRATION REPAIR SERVICES Extech offers complete repair and calibration services for all of the produ2. EXTECH INSTRUCTION MANUAL INSTRUMENTS Models 412440 610022 41233 Calibration Checkers 20mA EXTECH EXTEGH 1 Introduction Extech s Checkers are user friendly and provide a quick and accurate way to check the performance of a device Three models are available to provide simulated outputs of current pH or temperature Type J or K thermocouple 2 Current Loop Checker 412440 2 1 Features OQ Three check points low mid high Q Push button range selection for one hand operation Q Bright red LEDs indicates simulation point low battery power and overload over 240 ohms 2 2 Description The current loop checker is a handheld battery operated device that provides a quick and easy simulated output of 4mA 12mA and 20mA for use in testing and calibrating instruments Also the ideal device to set up indicating ranges on panel meters and controllers 2 3 Specifications Accuracy 0 1mA QQ Check Points 4mA 12mA 20mA Overload When load exceeds 240 ohms 2 4 Operation Plug the 60 coiled calibration cable into the checker and connect the spade lugs to the device under test Using the calibrator s push button select the desired calibration point and check the device under test for proper display or other desired response If the device under test responds within specification then it can be considered in proper calibration If the device under test does not respond within specification calibration is re
3. ch Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 3 412440 610022 41233 Ver 1 4 4 00
4. cts we sell For periodic calibration NIST certification or repair of any Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to insure calibration integrity 6 WARRANTY EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 for authorization A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Copyright 1999 Exte
5. quired 3 pH Checker 610022 3 1 Features OQ Three check points low mid high Push button range selection for one hand operation Q Bright red LEDs indicate simulation point low battery power and high ohm check 3 2 Theory of operation The pH checker is a handheld battery operated device that provides a convenient 4 00 7 00 and 10 00 pH simulated output referenced to 25 C for testing the functionality of pH meters and other devices The high ohm button is used to check the input impedance of the device under test With this button depressed check to see if the readings are lower then with the button not depressed if the readings are in fact lower than the device under test has a lower impedance than some probes can handle The checker should not be used for calibrating a pH meter Calibration of a pH meter must be performed with the pH electrode that will be used with the meter 3 3 Specifications QO Accuracy 0 1 pH 25 C Q Check Points 4 00 7 00 10 00pH 3 4 Operation Plug the calibration cable into the checker and attach the BNC or spade lug connector to the device under test Using the Calibrator s push button select the desired calibration point and check the response of the device under test If the device under test responds within specification then it can be considered in proper calibration If the device under test does not respond within specification calibration is required 2 412440 610022 412
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