Fluke ScopeMeter 190-202 Service Manual page 55

Fluke 190-062, -102, -104, -202, -204, -502, -504
Service Manual
8. Check channel B, C, and D in succession. Connect channel B, C, or D to
5502A when appropriate.
9. Press
10. Press B, C, or D to assign vertical range to channel B, C, or D.
11. Observe the 5502A output voltage and check to see if it is within range.
12. When you are finished, set the 5502A to 0 (zero) Volt and Standby.
Range
2 mV/div
5 mV/div
10 mV/div
20 mV/div
50 mV/div
100 mV/div
200 mV/div
500 mV/div
1 V/div
2 V/div
5 V/div
10 V/div
20 V/div
50 V/div
100 V/div
The vertical accuracy test can be done with dc voltage. This method is advised
for automatic verification that uses the Fluke Met/Cal Metrology Software. For
each sensitivity range you must proceed as follows:
1. Apply a +3 division voltage, and adjust the voltage until the trace is at +3
divisions. Write down the applied voltage V1.
2. Apply a -3 division voltage, and adjust the voltage until the trace is at -3
divisions. Write down the applied voltage V2.
3. Verify that V1-V2 = 6 x range ± (2.1 % + 0.04 x range)
Example: for range 10 mV/div. (range/div figure doubles because 2
measurements V1 and V2 are done for one accuracy check) the allowed
V1 - V2 = 60 mV ±(0.021 x 60 + 0.08 x 10) = 60 mV ±(1.26 + 0.8) = 60 mV
±2.06 mV.
4-10
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TRIGGER and select B as trigger source with
Table 4-2. Vertical Accuracy Verification Points
Initial 5502A Setting
V ac, sine, 50 Hz
4.243 mV
10.606 mV
21.213 mV
42.426 mV
106.06 mV
212.13 mV
424.26 mV
1.0607 V
2.1213 V
4.2426 V
10.606 V
21.213 V
42.426 V
106.06 V
212.13 V
F1
Allowable 5502A output for trace amplitude of
6 divisions
3.960 to 4.526
10.183 to 11.028
20.368 to 22.058
40.735 to 44.117
101.83 to 110.29
203.67 to 220.58
407.35 to 441.17
1.0184 to 1.1030
2.0367 to 2.2058
4.0735 to 4.4117
10.183 to 11.029
20.368 to 22.058
40.735 to 44.117
101.83 to 110.29
203.67 to 220.58
.