Dc Current Test - Fluke 8842A Instruction Manual

Step Range
1 20Ω
2 20Ω
3 200Ω
4 200Ω
5 2 kΩ
6 2 kΩ
7 20 kΩ
8 20 kΩ
9 200 kΩ
10 200 kΩ
11 2000 kΩ
12 2000 kΩ
13 20 MΩ
14 20 MΩ
1 – Using offset control
2 = 4 ½ digit counts
3 = Applies to 4-wire ohms only
6-7.

DC Current Test

The following procedure may be used to test the mA DC function:
1. Ensure the 8842A is on and has warmed up for at least 1 hour.
2. Select the mA DC function.
3. Connect the Current Source to the 2A and LO INPUT terminals.
4. For each step in Table 6-6, set the Current Source for the indicated input and verify
that the displayed reading is within the limits shown for each reading rate.
5. Set the Current Source for zero mA and disconnect it from the 8842A.
STEP RANGE
1 200 mA
2 200 mA
3 2000 mA
4 2000 mA 1000 mA
Table 6-5. Resistance Test
Input
(Nominal)
3
0Ω (short)
3
10Ω
3
0Ω (short)
3
100Ω
0Ω (short)
1 kΩ
0Ω (short)
10 kΩ
0Ω (short)
100 kΩ
0Ω (short)
1 MΩ
0Ω (short)
10 MΩ
Table 6-6. DC Current Test
INPUT
SLOW
MIN MAX
0 mA -00.040 +00.040
100 mA 99.920 100.080
0 mA -000.04 +000.04
999.56 1000.44
1
Error From Input (in counts)
Slow Medium
±40 ±60
±49 ±69
±4 ±6
±11 ±13
±3 ±5
±8 ±10
±3 ±5
±8 ±10
±3 ±5
±9 ±11
±3 ±6
±28 ±31
±4 ±7
±44 ±47
DISPLAYED READING
MEDIUM
MIN MAX
-00.060 +00.060
99.900 100.100
-000.06 +000.06
999.54 1000.46
Maintenance
PERFORMANCE TEST
2
Fast
±20
±21
±3
±4
±2
±3
±2
±3
±2
±3
±2
±5
±2
±6
FAST
MIN MAX
-00.20 +00.20
99.76 100.24
-000.2 +000.2
999.4 1000.6
6
6-9