User manual

1 Calibration Procedures
Performance Verification Tests
16 U1271A/U1272A Service Guide
12
Tem pera tur e
[4]
While the
rotary switch is in the
position, press the key
once.
–200 °C to 1372 °C –200 °C ± 3.0 °C ± 3.0 °C
0 °C ±1.0 °C ±1.0 °C
1372 °C ±14.7 °C ±14.7 °C
[4] Ensure that the ambient temperature is stable within ±1 ºC. Ensure that the multimeter is placed in a controlled
environment for at least 1 hour before you proceed to ensure that the multimeter’s internal reference junction sensor and
input terminal are stabilized at the same environment. Keep the multimeter away from any ventilation exit.
Differences in ambient compensation between the calibrator and multimeter may cause some deviations shown between
the readings of the calibrator and multimeter. Placing the multimeter close to the output terminal of the calibrator will help
reduce this deviation.
Keep the thermocouple test lead as close to the multimeter as possible.
Do not touch the thermocouple test lead after connecting it to the calibrator. Allow the connection to stabilize for at least
another 15 minutes before performing the measurement.
13
DCμA Turn the rotary switch
to the position.
300 μA300 μA ±0.65 μA ±0.63 μA
3000 μA 3000 μA ±6.5 μA ±6.3 μA
14
ACμA While the rotary switch
is in the position, press the
key once.
300 μA300 μA, 20 Hz N/A ±2.95 μA
300 μA, 45 Hz ±2.95 μA ±2.05 μA
300 μA, 65 Hz ±2.95 μA ±2.05 μA
300 μA, 1 kHz ±2.95 μA ±2.95 μA
3000 μA 3000 μA, 20 Hz N/A ±29.5 μA
3000 μA, 45 Hz ±29.5 μA±20.5 μA
3000 μA, 65 Hz ±29.5 μA±20.5 μA
3000 μA, 1 kHz ±29.5 μA±29.5 μA
15
DCmA Turn the rotary switch
to the position.
30 mA 30 mA ±0.065 mA ±0.063 mA
300 mA 300 mA ±0.65 mA ±0.63 mA
Table 1 - 2 Functional Test
Step Test function Range 5520 output
Error from nominal 1 year
U1271A U1272A
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