Amplitude Accuracy
This test measures the amplitude accuracy of the drive output. It should be within 2.0% of the
nominal value for all of the amplitude settings.
1. Connect the AC/DC voltmeter across the two sides of the fixture. A small piece of wire
inserted in each side of the fixture is a convenient way to connect the DVM. Do not connect
either end to ground. Set the DVM to AC volts, auto ranging.
2. Set the Model Z9216 to its default conditions by pressing the key sequence RCL 0 ENTER.
Set the unit to constant voltage mode. The output voltage should be 1.0 Vrms at 1 kHz.
Verify that the voltage reading is between 0.98 and 1.02 Vrms. Record the result.
3. Repeat step 2 for 100 Hz, 120 Hz, and 100 kHz. All voltage readings should be between 0.98
and 1.02 Vrms. Record the results.
4. Set the frequency to 1 kHz. Set the voltage sequentially to 0.25V and 0.10V. The DVM
should read within 2.0% of the nominal values (between 0.245 and 0.255 and between 0.098
and 0.102, respectively). Record the results.
5. Set the DVM to DC volts. Set the Model Z9216 to the C+D measurement mode, 100 kHz test
frequency, 0.10 V drive voltage with internal Bias on. Verify that the DC voltage is 2.0 VDC ±
2%.
Impedance Accuracy
These tests confirm that the Model Z9216 meets its impedance measurement accuracy specification.
Precision impedance standards are required. The minimum and maximum acceptable values are
determined by adding the tolerance of the Model Z9216 and that of the standard. For example, for
1.000 kΩ @ 1 kHz, the basic meter tolerance is ±0.20%, the tolerance of the resistance standard is
±0.02%, and thus the total tolerance is ±0.22% or ±02.2 Ω. So the range of acceptable values is
997.8 Ω to 1002.2 Ω. If standards with different tolerances are used, the acceptable limits will have to
be calculated and adjusted. The sheets at the end of this manual contain blank columns so that the
verifying technician may add custom ranges based on the accuracy of the resistance decade box
used..
Resistance Accuracy
1. Connect the Fixture Adapter to the Model Z9216. Install a BNC to stacking banana plug
adapter on the end of each BNC cable. Tape over (or cut off) the ground leads of the plugs
connected to the orange (PH) and purple (PL) cables. Connect the ground leads of the red
(IH) and blue (IL) cables to the case ground of the decade box. Plug the orange, (PH) and
purple, (PL) signal leads to the "+" and "−" terminals on the decade box. Plug the red signal
lead, (IH) into the orange signal lead and plug the blue, (IL) signal lead into the purple signal
lead. Set the Model Z9216 to its default conditions by pressing RCL 0 ENTER, then press the
R+Q key and set the test frequency to 1 kHz.
2. Unplug the red/orange lead pair from the "+" terminal of the decade box and plug them into
the blue/purple lead pair. Perform short circuit calibration. Remove the red/orange lead pair
form blue/purple lead pair and locate them at the same separation from the blue/purple pair as
they will be during operation. Perform open circuit calibration.
3. Connect the red/orange lead pair to the "+" terminal of the decade box. Set the dials to all
zeros. Note the resistance value that the Model Z9216 measures. This is the resistance of
the switch contacts and connectors. Enter this as a relative value in the entry display. Set the
Model Z9216 to the DEV display mode.
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