ScopeMeter® Test Tool
Performance Verification
9
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:
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.
Exception: 2 mV/div, where accuracy is ±(2.9 % + 0.08 range/div.)
Table 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
