TB 9-6625-2350-35
IDENTIFICATION AND DESCRIPTION
of Digital Multimeter, AN/USM-486A. TM 11-6625-3277-14 and the manufacturers' manuals
were used as the prime data sources in compiling these instructions. The equipment being
calibrated will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. None
hour, using the dc and low frequency technique.
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications
Dc voltage
Range: 0 to 1000 V in 5 ranges
Accuracy: 200 mV range; 0.05 % +10 counts
2, 20, 200, 1000 V ranges; 0.05% + 30 counts
Dc current
Range: 0 to 10 A in 6 ranges
Accuracy: 200 A, 2 mA, 20 mA, 200 mA; 0.2% + 10 counts
2000 mA, 10 A; 0.5% + 20 counts
Ac voltage
Range: 0 to 750 V in 5 ranges
Accuracy: (% of input + counts)
50-100
2050
50 Hz
1020
20 50
Hz
10 kHz
kHz
kHz
kHz
200 mV; 1.5 + 100 0.5 + 100 1.0 + 100 2.0 + 500 29.2 + 0
2 V;
1.5 + 100 0.5 + 100 1.0 + 100 2.0 + 500 29.2 + 0
20 V;
1.5 + 100 0.5 + 100 1.0 + 100 2.0 + 500 29.2 + 0
200 V;
1.5 + 100 0.5 + 100 1.0 + 100 2.0 + 500 29.2 + 0
750 V;
1.5 + 100 0.5 + 100 1.0 + 100 2.0 + 500 29.2 + 0
2
CHANGE 1
PIN NO: 081048-001
