Figure 3. Calibration test setup.
(2) Compare voltage levels indicated on volt-meter and
8. VOLTAGE AC PHASE A Meter Calibration
VOLTAGE AC PHASE C meter of unit under test. The
Accuracy. a. Performance Check.
VOLTAGE AC PHASE C meter should indicate voltage
(1) Energize equipment and allow 5 minutes for
equipment to warm up and stabilize.
b. Adjustments. No adjustments can be made.
(2) Compare voltage levels indicated on volt-meter and
VOLTAGE AC PHASE A meter of unit under test. The
Accuracy. a. Performance Check.
VOLTAGE AC PHASE A meter should indicate voltage
(1) Trip 115 VOLT AC CIRCUIT BREAKER of unit under
b. Adjustment. No adjustments can be made.
test.
(2) Arrange ammeter connections for 10 ampere
operation and connect to test jacks J10 and J16 of power
Accuracy. a. Performance Check.
monitor test fixture with test leads.
(1) Connect voltmeter to test jacks J2 and J4 of power
(3) Close 115 VOLT AC CIRCUIT BREAKER of unit
monitor test fixture (fig. 2) with test leads.
under test.
(2) Compare voltage levels indicated on volt-meter and
(4) Compare current levels indicated on ammeter and
VOLTAGE AC PHASE B meter of unit under test. The
AMPERE AC PHASE A meter of unit under test. The
VOLTAGE AC PHASE B meter should indicate voltage
AMPERE AC PHASE A meter should indicate current
level displayed on ammeter, + 2.1 percent.
b. Adjustments. No adjustments can be made.
10. VOLTAGE AC PHASE C Meter Calibration
Accuracy. a. Performance Check.
Accuracy. a. Performance Check.
(1) Trip 115 VOLT AC CIRCUIT BREAKER of unit under
(1) Connect voltmeter to test jacks J3 and J4 of power
test.
monitor test fixture with test leads.
5