Fluke 12B, Руководство по обслуживанию

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12B/18/7 Series
Service Manual
3-8
Table 3-3. Performance Tests for Models 12B and 18
Test
No.
Meter Range
(Automatic Selection 12B Only)
Input To
Meter
Switch
Position
Display
Minimum
Display
Maximum
1
2
3
4
5
6
7
8
9
2
10
4.000V ac
4.000V ac, MIN MAX
4.000V ac
4.000V ac
4.000V ac
4.000V ac
40.00V ac
40.00V ac
400.0V ac
600V ac
0V
0V
10 mV, 50 Hz
10 mV, 400 Hz
3.5V, 50 Hz
3.5V, 400 Hz
35V, 50 Hz
35V, 400 Hz
350V, 80 Hz
600V, 400 Hz
Center
Center
Center
Right
1
Right
1
Center
Center
Right
1
Right
1
Center
0.000
0.000
0.007
0.007
3.430
3.430
34.30
34.30
343.0
586
0.003
0.040
0.013
0.013
3.570
3.570
35.70
35.70
357.0
614
11
12
13
14
15
16
17
18
4.000V dc, MIN MAX
4.000V dc
40.00V dc
400.0V dc
4.000V dc
40.00V dc
400.0V dc
600V dc
0V
0V
+20 mV dc
-200 mV dc
+3.5V
-35V dc
+100V dc
-600V dc
Center
Right
1
Right
1
Center
Center
Center
Center
Center
-0.012
-0.002
00.01
-000.3
+3.466
-35.33
+99.0
-606
0.012
0.002
00.03
-000.1
+3.534
-34.67
+101.0
-594
19
20
3
21
3
22
23
24
25
26
27
28
29
30
31
5
32
5
Continuity
Continuity, Automatic Selection
Continuity, Automatic Selection
400.0
Ω
400.0
Ω
400.0
Ω
4.000 k
Ω
40.00 k
Ω
400.0 k
Ω
4.000 M
Ω
40.00 M
Ω
Ω
, Automatic Selection
1.000
µ
F
1.000
µ
F
+2V dc
3
+3.43V dc
3
-0.5V dc
3
0.0
Ω
1.0
Ω
350.0
Ω
1.0 k
Ω
35 k
Ω
100 k
Ω
2.9 M
Ω
35 M
Ω
1.96V dc
0.0
µ
F
0.95
µ
F
Right
Right
Right
Right
Right
Right
Right
Right
Right
Right
Right
Right
Right
Right
1.980
3.397
4
-0.507
4
0.0
0.8
346.6
0.990
34.67
99.0
2.873
34.44
1.940
4
-0.001
µ
F
0.930
µ
F
2.020
3.463
4
-0.493
4
0.2
1.2
353.4
1.010
35.33
101.0
2.927
35.56
1.980
4
0.001
µ
F
0.970
µ
F
1. Center position for Model 18.
2. In the Automatic Selection mode, the UUT uses a low-impedance thermistor (~2.5k for circuit protection and load
testing (referred to as low-Z input circuitry). When using the 5100B, 5500A, or 5700A to drive the UUT with high
voltages, avoid an overload/current limit condition by gradually stepping the voltage up (waiting two seconds
between each step) from 90.0V, 120.0V, 180.0V, and 350.0V at 80 Hz each step.
3. Calibrator 50
Ω
divider override.
4. The dc volts annunciator must be on. Test does not apply to Model 18.
5.
Conducting performance tests of the 400
Ω
, 4 k
Ω
, 40 k
Ω
, and 1
µ
F ranges (tests no. 22, 23, 24, 25, 26, 31, and 32)
verifies that the discrete and integrated circuitry needed to support the other capacitance ranges are working within
specifications. Therefore, the tests indirectly verify that the meter will meet specification in the 10
µ
F, 100
µ
F,
1000
µ
F, and 10,000
µ
F ranges.
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