METRON QA-ST, User And Service Manual

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The purpose of this test is to calibrate the QA-ST to display the cor-
rect mains voltage.
3. Press “Supply V”.
4. Adjust the mains voltage with an external variable AC voltage
(VARIAC) source. Then, adjust the QA-ST potentiometer R67
(see Appendix A for location) until the QA-ST LCD displays the
same value.
5. Perform the test for tall the given values in the test protocol under
“Mains Supply Voltage: Reference”.
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