TB 9-6625-1314-35
SECTION I
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Digital Voltmeter Hewlett-Packard Model 3439A or C28-3439A with C15-
3444A and 3444A plug-ins; Digital Voltmeter, Hewlett-Packard Model 3440A with 3445A
or C06-3445A Plug-in and High Gain Auto Range Unit Model 3443A; and Digital
Multimeter, Data Technology Model 360. The manufacturer's instruction manuals were
used as the prime data source in compiling these instructions. The equipment being
calibrated will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. Model variations which affect calibration are described in text.
b. Time and Technique. The time required for this calibration is approximately 4
hours per instrument, using the dc (direct current) and low frequency technique.
2. Calibration Data Card, DA Form 2416
prescribed by TM 38-750. DA Form 2416 must be annotated in accordance with TM 38-750
for each calibration performed.
b. Adjustments to be reported on DA Form 2416 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).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in tables 1 through 3.
Table 1. Calibration Description for Digital Voltmeter, Hewlett-Packard Model 3439A
or C28-3439A with 3444A or C15-3444A Plug-ins
Test instrument parameters
Performance specifications
Dc volts
Range
100 mV to 1000 V in five ranges
Accuracy
0.1% of reading 1 digit from 99.99 to 999.9 mV
0.05% of reading 1 digit from 9.999 V to 999.9 V
Dc current
Range1
99.99 A to 999.9 mA in five ranges
Accuracy
0.2% of reading 1 digit
Range
0 Ω to 9.999 MΩ in five ranges
Accuracy
0.3% of reading 1 digit, except 1%
1 digit on 10 MΩ range
11000
mA range not calibrated at Level C.
3
