THM420 Performance Verification
Handheld and Benchtop Instruments Basic Service
7
Performance Verification
This section contains procedures to verify that the THM420 performs as
warranted. If your instrument fails any of the checks, it needs adjustment and or
repair.
The performance verification procedures provide a valid confirmation of
instrument electrical characteristics and function under the following conditions:
The instrument operates in an 18° to 28° C environment with a relative
humidity of less than 80%.
The instrument remains fully assembled (do not remove the bottom cover).
The THM420 performance verification consists of the checks listed in Table 8.
Table 8: Performance Verification Checks
DC Voltage
AC Voltage
Resistance
Diode and Continuity
Frequency
DC Amperes
AC Amperes
Trace Shift
Trace Slope
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