TB 9-6625-199-24
APPENDIX B
PERFORMANCE TABLES
Meterman, Model DM78A
Table B-155. Calibration Description.
Test instrument parameters
Performance specifications
DC VOLTAGE
Range: 0 to 450 V dc
Accuracy: (2% rdg + 2 dgts), 320 mV dc rng;
(1% rdg + 2 dgts), 3.2 V dc rng;
(2% rdg + 2 dgts), 32 to 450 V dc rngs
AC VOLTAGE
Range: 0 to 450 V ac, 50 to 60 Hz
Accuracy: (4.0% rdg + 5 dgts)
Range: 0 to 30 MΩ
Accuracy: (2% rdg + 4 dgts), 320 Ω rng;
(2% rdg + 2 dgts), 3.2 to 320 kΩ rngs;
(6% rdg + 2 dgts), 3.2 MΩ rng;
(10% rdg + 2 dgts), 30 MΩ rng
Table B-156. DC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V dc)
(V dc)
(V dc)
Min
Max
290 m
320 m
284.0 m
296.0 m
1
3.2
0.988
1.012
2.2
3.2
2.176
2.224
2.9
3.2
2.869
2.931
-2.9
3.2
-2.931
-2.869
29
32
28.40
29.60
290
320
284.0
296.0
410
450
400
420
Table B-157. AC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V ac)
(V ac)
(V ac)
Min
Max
2.9 @ 60 Hz
3.2
2.779
3.021
29 @ 60 Hz
32
27.79
30.21
290 @ 60 Hz
320
277.9
302.1
410 @ 60 Hz
450
389
431
Table B-158. Resistance.
Calibrator output
Test instrument
Limits (%/Ω)
Applied
Range
(Ω)
(Ω)
Min
Max
190
320
-2.21% (185.8)
+2.21% (194.2)
1.9 k
3.2 k
-2.11% (1.860 k)
+2.11% (1.940 k)
19 k
32 k
-2.11% (18.60 k)
+2.11% (19.40 k)
190 k
320 k
-2.11% (186.0 k)
+2.11% (194.0 k)
1.9 M
3.2 M
-6.11% (1.784 M)
+6.11% (2.016 M)
19 M
30 M
-10.11% (17.08 M)
+10.11% (20.92 M)
B-61