Chauvin Arnoux C.A 6116, Руководство пользователя

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72
8.2.5. InsUlAtIon REsIstAnCE MEAsUREMEnts
Particular reference conditions:
Capacitance in parallel: zero.
Maximum acceptable external AC voltage during the measurement: zero.
Frequency of external voltages: DC and 15.8 ... 65 Hz.
The frequency is guaranteed only for a voltage
≥
20 V .
Maximum no-load voltage: 1.1 x U
N
(for U
N
≥
100 V)
Nominal current:
≥
1 mA
Short-circuit current:
≤
3 mA
Intrinsic uncertainty on the measurement of the test voltage: ± (2.5% + 3 ct)
Measurement range at 50 V 0.01 - 7.99 M W 8.00 - 39.99 M W
40.0 - 399.9 M W 400 - 1999 M W
Measurement range at 100 V 0.01 - 3.99 M W 4.00 - 39,99 M W
Measurement range at 250 V 0.01 - 1.99 M W 2.00 - 39.99 M W
Measurement range at 500 V 0.01 - 0.99 M W 1.00 - 39.99 M W
Measurement range at 1000 V 0.01 - 0.49 M W 0.50 - 39.99 M W
Resolution 10 k W 10 k W 100 k W 1 M W
Intrinsic uncertainty at 50 V ± (5% + 3 ct) ± (2% + 2 ct)
Value given for
guidance
Intrinsic uncertainty at 100 V ± (5% + 3 ct) ± (3% + 3 ct)
Intrinsic uncertainty at the other voltages ± (5% + 3 ct) ± (2% + 2 ct)
Uncertainty of operation at 50 V ± (12% + 3 ct) ± (10% + 2 ct)
Value given for
guidance
Uncertainty of operation at 100 V ± (12% + 3 ct) ± (11% + 2 ct)
Uncertainty of operation at the other voltages ± (12% + 3 ct) ± (10% + 2 ct)
typical measurement settling time as a function of the elements tested
These values include influences due to the capacitive component of the load, to the automatic range system, and to the regula-
tion of the test voltage.
Test voltage Load Non-capacitive With 100 nF With 1 µF
250 V - 500 V - 1000 V
10 M
W
1 s 2 s 12 s
1000 M
W
1 s 4 s 30 s
typical discharge time of a capacitive element to reach 25 v
Test voltage 50 V 100 V 250 V 500 V 1000 V
Discharge time (C in µF) 0,25 s x C 0,5 s x C 1 s x C 2 s x C 4 s x C
typical test voltage vs load curve
The voltage developed as a function of the resistance measured has the following form:
I = 1 mA
U
N
R
N
= U
N
/ 1 mA