Bench Test Instruments and Handheld Oscilloscopes Basic Service
9
THM500 Series Performance Verification
This section contains procedures to verify that the THM500 Series instruments
perform as warranted. Verify instrument performance whenever the accuracy or
function of your instrument is in question.
The performance verification procedures provide a valid confirmation of
instrument electrical characteristics and function under the following conditions:
H The instrument operates within the environmental conditions specified in
Table 4 on page 8 during the verification process.
H The instrument operates continuously for a 5 minute period before the
verification begins.
The performance verification procedure should be performed annually or after
every 2000 hours of operation if used infrequently.
Table 6 lists the equipment needed to complete the performance verification
procedures.
The THM500 Series performance verification consists of the checks listed in
Table 5.
Table 5: Performance verification checks
Functional Test
DMM Verification
DC Voltage Accuracy
AC Voltage Accuracy
Resistance Accuracy
Oscilloscope Verification
Noise
Input Leakage Trace Shift
Time Base Accuracy
Vertical Accuracy
Analog Bandwidth
Crosstalk from DMM to Oscilloscope
Crosstalk Between Oscilloscope Channels
DC Offset
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