TB 9-6625-174-24
APPENDIX B
PERFORMANCE TABLES
Extech, Model MA640
Table B-236. Calibration Description.
Test instrument parameters
Performance specifications
DC VOLTAGE
Range:0 to 600 V dc
Accuracy: (1.5% rdg + 2 dgts)
AC VOLTAGE
Range: 0 to 600 V ac
Accuracy: 50 to 400 Hz, (1.5% rdg + 2 dgts)
DC CURRENT
Range: 0 to 600 A dc
Accuracy: 60 A range, (2.8% rdg + 5 dgts); 600 A range, (3.0% rdg + 5 dgts)
AC CURRENT
Range: 0 to 600 A ac
Accuracy: 50 to 60 Hz: 60 A range, (2.8% rdg + 8 dgts); 600 A range,
(3.0% rdg + 8 dgts)
Range: 0 to 60 MΩ
Accuracy: 600 Ω range, (1.0% rdg + 4 dgts); 6 kΩ thru 600 kΩ ranges,
(1.5% rdg + 2 dgts); 6 MΩ range, (2.5% rdg + 3 dgts);
60 MΩ range, (3.5% rdg + 5 dgts)
Range: 10 Hz to 10 kHz
Accuracy: (1.5% rdg + 2 dgts)
Sensitivity: 15 V rms
Range: 0 to 4000 μF
Accuracy: 40 nF range, (4.0% rdg + 20 dgts); 400 nF thru 40 μF ranges,
(3.0% rdg + 5 dgts); 400 μF range, (4.0% rdg + 10 dgts);
4000 μF range, (5.0% rdg + 10 dgts)
TEMPERATURE
Range:-4 to 1400 F
Accuracy: (3.0% rdg + 9 F)
Range: -20 to 760 C
Accuracy: (3.0% rdg + 5 C)
Table B-237. DC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V dc)
(V dc)
(V dc)
Min
Max
540 m
600 m
531.7
548.3
5.4
6
5.317
5.483
54
60
53.17
54.83
540
600
531.7
548.3
Table B-238. AC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V ac)
(V ac)
(V ac)
Min
Max
5.4 @ 50 Hz
6
5.295
5.505
5.4 @ 400 Hz
6
5.295
5.505
54 @ 50 Hz
60
52.95
55.05
54 @ 400 Hz
60
52.95
55.05
540 @ 50 Hz
600
529.5
550.5
540 @ 400 Hz
600
529.5
550.5
B-68
