ZD Series High Impedance Differential Probes
12
Performance Verification
This procedure can be used to verify the warranted characteristics of a ZD
series differential probe (ZD500, ZD1000, ZD1500). It tests:
•
Output Zero Voltage
•
LF Attenuation Accuracy
The recommended calibration interval for the ZD series models is one year.
Complete the performance verification as the first step of annual calibration.
Results can be recorded on a photocopy of the Test Record provided.
Performance verification can be completed without removing the probe covers
or exposing the user to hazardous voltages. There are no adjustments.
Required Test Equipment
The following table lists the test equipment (or equivalent) that is required for
performance verification of a ZD series probe. As connector types may vary on
different brands and models of test instruments, additional adapters or cables
may be required.
This procedure has been developed to minimize the number of calibrated test
instruments required. Only the parameters listed in boldface in the Minimum
requirements column must be calibrated to the accuracy indicated.
NOTE: The function generator used in this Performance Verification Procedure
is used for making relative measurements. Because the output of the generator
is measured with an oscilloscope in this procedure, it is not required to calibrate
the generator.
The warranted characteristics of the ZD probes are valid at any temperature
within the Operating Environment listed in this manual (p.3). However, some of
the other test equipment used to verify performance may have environmental
limitations required to meet the accuracy needed for the procedure. Be sure
that the ambient conditions meet the requirements of all the test equipment
used in this procedure.