Fluke 190-062, -102, -104, -202, -204, -502, -504
Service Manual
4-10
8. Check channel B, C, and D in succession. Connect channel B, C, or D to
5502A when appropriate.
9. Press
TRIGGER
and select B as trigger source with
F1
.
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.
Table 4-2. Vertical Accuracy Verification Points
Range
Initial 5502A Setting
V ac, sine, 50 Hz
Allowable 5502A output for trace amplitude of
6 divisions
2 mV/div 4.243 mV 3.960 to 4.526
5 mV/div 10.606 mV 10.183 to 11.028
10 mV/div 21.213 mV 20.368 to 22.058
20 mV/div 42.426 mV 40.735 to 44.117
50 mV/div 106.06 mV 101.83 to 110.29
100 mV/div 212.13 mV 203.67 to 220.58
200 mV/div 424.26 mV 407.35 to 441.17
500 mV/div 1.0607 V 1.0184 to 1.1030
1 V/div 2.1213 V 2.0367 to 2.2058
2 V/div 4.2426 V 4.0735 to 4.4117
5 V/div 10.606 V 10.183 to 11.029
10 V/div 21.213 V 20.368 to 22.058
20 V/div 42.426 V 40.735 to 44.117
50 V/div 106.06 V 101.83 to 110.29
100 V/div 212.13 V 203.67 to 220.58
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.
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