TB 9-6625-2270-35
IDENTIFICATION AND DESCRIPTION
1. Test Instrument
Identification.
This bulletin provides instructions for the
calibration of Digital Multimeter, AN/USM-486(U) (John Fluke, Model 8050A/FM).
Drawing No. A3002840 and TM 11-6625-3055-14 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.
b. Time and Technique. The time required for this calibration is approximately 1
hour using the dc and low frequency technique.
2. Forms,
Records, and
Reports
a. Forms, records, and
reports required for
calibration personnel at all
levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. Report only those adjustments made and designated with (R).
3. Calibration
Description. TI
parameters and
performance specifications which
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications 1 (4 1/2 digit display)
Dc voltage
Range: 0 to 1000 V (in 5 ranges)
Accuracy: (.05% of reading + 3 digits)
Ac voltage
Range: 0 to 750 V (in 5 ranges)
Accuracy: (2.0% of reading + 50 digits)
dB display
Range: -60 dBm to +30 dBm
Frequency: 20 Hz to 20 kHz
Accuracy: (dB)
-60 to +10 dBm............ .50
+10 to +30 dBm........... .25
Ac current3
Range: 0 to 2000 mA (in 5 ranges)
Frequency: 20 Hz to 20 kHz
Accuracy: (% of reading + digits)
Range
Frequency
20 Hz to 10 kHz
10 to 20 kHz
200 A through 200 mA
1.0 + 25
2.0 + 50
2000 mA
2.0 + 50
2.0 + 50
Dc current
Range: 0 to 2000 mA (in 5 ranges)
Accuracy:
(% of reading + digits)
Range: 200 A through 200 mA........................
0.2 + 1
2000 mA....................................................
0.5 + 2
See footnotes at end of table.