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TCM-39032 9
CHAPTER 3
CALIBRATION
The TCM-39032 should be calibrated every 12 months or whenever performance
verification indicates that calibration is necessary.
All calibrations can be done with the case closed. The instrument is calibrated by
changing the internally shored digital calibration constants.
Recommended Equipment
Recommended test equipment for calibrating the TCM-39032 is listed in the table
below. Equipment other than that shown in the table may be used if the
specifications meet or exceed those listed. If the LDC-3900 is equipped with the
Model 1231 GPIB/IEEE-488.2 interface, the user may refer to the calibration
procedures using the GPIB later in this chapter.
Table 3.1 Recommended Test Equipment
Description Mfg./Model Specification
DMM HP 3457A DC Amps ( @ 1.0 A ): +1%
Resistance ( @ 10 Ω ): 0.02%
Resistors Metal Film 10 KΩ for 100 µA calibration
100 KΩ for 10 µA calibration
6.8 KΩ for LM335 sensor calibration
16.8 KΩ for AD590 sensor calibration
118 Ω and 100Ω for RTD sensor calibration
Resistors High Power 1 Ω, 10 W, low TCR for current calibration