Tektronix DCM300, Technical Reference

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DTM900 and DTM920 Adjustment Procedures
Handheld and Benchtop Instruments Basic Service
11
NOTE . Before making any adjustment, warm up the test equipment according to
the manufacturer’s recommendations.
Table 6: Adjustment Test Equipment
Description Minimum requirements Examples
Thermocouple Simulator –200 to1370
_
C
±
0.01%
(–328 to 2498
_
F
±
0.01%)
Wavetek 9100 Universal
Calibration System or
5500 C
DC Voltage Source (DTM920) 10 mV to 2 V, 0.01% accuracy
Fluke 5500A Calibrator
Thermocouple Extension
Cable K-type thermocouple wire with
SMP male end connectors Omega TECK-10-10
Transition Adapter (DTM920) SMP female-to-male banana Omega TAS-U-5
Preparation for Adjustment
The following guidelines apply to all DTM900 and DTM920 adjustments:
H
Perform all adjustments in a 21
_
to 25
_
C ambient environment with a
relative humidity of 75% or less.
H
Warm up the thermometer for at least 30 minutes.
H
Do not alter any setting without reading the entire adjustment procedure first.
H
Do not alter a setting unless a performance characteristic cannot be met at
the current setting.
H
Read the Safety Summary at the beginning of this manual.
NOTE
. Thermocouple connectors are temperature sensitive. For best measure-
ment accuracy, do not touch the connector contacts and minimize handling of the
connector housings.