Keysight U1271A - Your Multimeter in Brief

Calibration Procedures 1
Keysight U1270 Series Service Guide 33
13
Temperature
[g]
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
[g] 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.
Set both Fluke 5520A and multimeter to internal reference.
Prior to performing measurements, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A
TC output, and the other end to a precision thermometer to verify that the source outputs the desired value. Adjust the source accordingly
if necessary.
To perform the measurement, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TC
output, and the other end to the multimeter via a TC-to-banana adapter. Allow at least 1 hour for the multimeter to stabilize.
14
DCμA Turn the rotary switch to
the position.
300 μA300 μA±0.65 μA ±0.65 μA
3000 μA 3000 μA±6.5 μA ±6.5 μA
15
ACμA While the rotary switch is
in the position, press the
key once.
300 μA 300 μA, 20 Hz - ±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 - ±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
Table 1-2 Performance verification tests (continued)
Step Test function Range 5520 output Error from nominal 1 year
U1271A U1272A/
U1273A/U1273AX
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