Probe Calibration Generator Test - Fluke ScopeMeter 190 II Series Service Manual

Table 4-19. Resistance Measurement Verification Points
5502A output
0 Ω
400 Ω
4 kΩ
40 kΩ
400 kΩ
4 MΩ
30 MΩ

Probe Calibration Generator Test

To calibrate, connect a 10:1 probe as supplied with the Test Tool to input A (red
probe). Connect the probe tip and the probe ground lead with the probe cal
terminals on the lower left side of the Test Tool as shown in Figure 4-15 (the
figure is universal and shows a Test Tool with four oscilloscope channels such as
the model 190-204).
1. Reset the Test Tool.
A
2. Press
F3
3. Press
4. Press F1
F4
5. Press
adjust the square wave response to a pure square wave (pulse top must be
straight). The trimmer is located in the probe housing and can be reached by
rotating the center part of the housing. For further information refer to the
probe instruction sheet.
6. When done, press
Probe Calibration is OK if all instructions shown on the display are finished
successfully.
Close the hole of the trimmer by rotating the center part of the housing. This
is important for safe use of the probe at high input voltages.
7. Repeat the procedure for channel B (blue probe). For the 4-Channel Test
Tools (190-104, 190-204, 190-504), repeat the procedure for channel C (gray
probe) and channel D (green probe).
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Meter Reading (COMP 2 wire)
0.0 to 0.5 (COMP 2 wire)
397.1 to 402.9 (COMP 2 wire)
3.971 to 4.029 (COMP 2 wire)
39.71 to 40.29 (COMP 2 wire)
397.1 to 402.9 (off)
3.971 to 4.029 (off)
29.77 to 30.23 (off)
to show the input A key labels.
(
- PROBE A 10:1 ....).
( and follow the instructions on the display.
- PROBE CAL...)
to start the probe calibration. The first step is to manually
F4 to start the DC calibration automatically. The
Performance Verification
Meter Tests
4
4-39