Extech Instruments 382357-NIST User Manual page 10

Reference Test Loop
The reference test loop is a set of resistors that provides a means to check the performance of
the meter.
Open the measurement jaws and check that the mating surfaces are clean and free of dust,
1.
dirt, or any foreign substances. Clean if necessary.
Clamp the meter around the reference loop as shown in the diagram.
2.
Give the meter a few seconds to settle and read the measurement. The meter should
3.
display approximately the same value as marked on the reference loop, taking into
consideration the accuracy listed in the specification chart. If the readings are not similar to
what is marked on the reference loop, consult the Trouble Shooting and Maintenance
sections of this manual.
10 382357‐EU‐EN V2.4 2/13