Performance Tests and Calibration 5
Keysight U1241B and U1242B User’s and Service Guide 69
11
Turn the rotary switch to
position
10 A
10.000 A
[d]
± 65 mA
12
Press to go to A
function
10 A
10.000 A
[d]
, 500 Hz
± 105 mA
10 A
10.000 A
[d]
, 1 kHz
± 155 mA
13
Turn the rotary switch to T1
or T1T2
[e],[f]
position
–40 ºC until
1000 ºC
[g]
–40 ºC ± 1.4 ºC
0 ºC ± 1ºC
1000 ºC ± 11ºC
14
Press to go to T2 function
[e],[f]
–40 ºC until
1000 ºC
[g]
–40 ºC ± 1.4 ºC
0 ºC ± 1 ºC
1000 ºC ± 11 ºC
[a] The accuracy of 1 kΩ and 10 kΩ are specified after Math Null, that is used to substrate the test lead resistance and the thermal effect.
[b] For the range of 100 MΩ, the RH is specified for <60%.
[c] Current can be measured from 50 mA to 440 mA continuously. An addition of 0.2% to the specified accuracy when measuring a signal greater
than 440 mA to 1100 mA for 30 seconds maximum. After measuring > 440 mA current, cool down the multimeter for twice the measuring
time taken before proceed for low current measurement.
[d] Current can be measured from 0.5 A up to 10 A continuously with the maximum operating temperature of 50 ºC. An addition 0.3% needs to be
added to the specified accuracy if the signal measured is in the range of 10 A to 19.999 A for 15 seconds maximum. After measuring a current
of > 10 A, leave the multimeter to cool down for 60 seconds before applying low current measurement.
[e] Only available in U1242B.
[f] — 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.
[g] The multimeter should be ON for at least 1 hour before measurements are taken. The accuracy does not include the tolerance of
thermocouple probe. When measuring temperature with respect to any temperature calibrator, set both the calibrator and multimeter with
external reference (without internal ambient compensation 0 ºC). If both calibrator and multimeter are set with internal reference (with
internal ambient compensation), deviation may be present between the readings of the calibrator and multimeter.
Table 5-2 Verification Tests (continued)
Step Test Function Range 5520A Output Error from nominal 1 year
U1241B U1242B
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