True RMS Multimeters
Performance Tests
11
Preparing for the Performance Test
WWarning
To avoid possible electric shock or personal injury:
•
Do not perform the following procedures unless qualified to do so. Some
procedures involve the use of high voltages.
•
Before handling the test connections and in between tests, make sure the
calibrator is in standby mode (STBY).
To prepare for the performance test:
1. Make sure that you have the required equipment, see Table 1.
2. Warm up the calibrator as required by its specifications.
3. Allow the temperature of the UUT to stabilize at room temperature ( 23 °C ± 5 °C [73 °F ± 9 °F] ).
4. Check the fuses and battery, and replace them if necessary. Refer to "Replacing the Fuses" and
"Replacing the Battery".
Performance Tests
1. Set the UUT switch to the position called for in Table 2 (175) or Table 3 (177/179), and for all
measurements other than current (amps), connect the calibrator to the VeG and
COM input
terminals.
• If testing the milliamps function, connect the calibrator to the meter
400 mA and COM input
terminals.
• If testing the amps function, connect the calibrator to the meter
10A and COM input terminals.
2. Referring to Table 2 or Table 3, apply the indicated calibrator output voltages to the UUT for each
test.
3. Verify that the UUT displays a reading that is within the limits shown in the Meter Response column.
Table 2. Performance Tests 175
Meter Response
Test
(Switch Position) 5520 Output Lower Limit Upper Limit
300 mV 45 Hz 296.7 mV AC 303.3 mV AC
5 V 500 Hz 4.947 V AC 5.053 V AC
5 V 1 kHz 4.897 V AC 5.103 V AC
50 V 1 kHz 48.97 V AC 51.03 V AC
50 V 45 Hz 49.47 V AC 50.53 V AC
300 V 45 Hz 296.7 V AC 303.3 V AC
100 V 500 Hz 98.7 V AC 101.3 V AC
100 V 1 kHz 97.7 V AC 102.3 V AC
600 V 500 Hz 593.7 V AC 606.3 V AC
K
AC Volts
1000 V 45 Hz 987 V AC 1013 V AC
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General
Weight and Dimensions
