Fluke 287C - Page 24

287/289
Calibration Manual
20
Table 4. 287/289 Performance Test Steps (cont.)
Set 5520A for COMP off
Connect 5520A Auxiliary Output to Meter’s mA/μA and COM Input Terminals
Step Function Range Input Level
Frequency
or Model
Display Reading
[1]
Lower
Limit
Upper
Limit
48 μA AC 500.00 μA 500 μA 60 Hz 496.80 503.20
49 μA AC 500.00 μA 500 μA 30 kHz 492.85
[5]
507.15
[5]
50 μA AC 5000.0 μA 5000 μA 30 kHz 4928.5
[5]
5071.5
[5]
51 μA DC 500.00 μA 500 μA - - 499.42 500.58
52 μA DC 5000.0 μA 5000 μA - - 4996.0 5004.0
53 mA AC 50.000 mA 4 mA 20 Hz 3.940 4.060
54 mA AC 50.000 mA 30 mA 30 kHz 29.375
[5]
30.625
[5]
55 mA AC 400.00 mA 300 mA 30 kHz 284.60 315.40
56 mA AC 400.00 mA 400 mA 60 Hz 397.55 402.45
57 mA DC 50.000 mA 0.1 mA - - 0.090 0.110
58 mA DC 50.000 mA 50 mA - - 49.965 50.035
59 mA DC 400.00 mA 400 mA - - 399.38 400.62
Connect 5520A, Auxiliary 20A output, to Meter’s A and COM Input Terminals
60 AAC 5.0000 A 5 A 1 kHz 4.9580 5.0420
61 AAC 10.000 A 5 A 1 kHz 4.955 5.045
62 ADC 5.0000 A 5 A - - 4.9840 5.0160
63 ADC 10.000 A 10 A - - 9.968 10.032
Connect 5520A Normal Output to Meter’s V Input Terminal
64 LoZ (289)
[6]
1000 V 120 V
[7]
60 Hz 113.6 126.4
[1] Must allow for source and Meter settling before recording reading.
[2] When using the relative mode (RELΔ) to compensate for offsets.
[3] The Meter accuracy is not specified at this frequency with Low-pass filter on. The display reading limits shown in
table , checks that the Low-pass filter is active and follows an expected roll-off curve.
[4] With a film capacitor or better, using relative mode (REL Δ) to zero residual.
[5] Test limits are mathematically guard banded to ensure performance, at 20 kHz and lower.
[6] To obtain full accuracy in DC mV, Temperature, ohms, and LoΩ, let the Meter stabilize for 20 minutes after using
LoZ.
[7] To avoid calibrator overload/current limit condition, step the calibrator output to 60 V and then 120 V.
[8] Use 50 Ω output Z. For scope option, use levelsine mode.