TB 9-6625-2802-35
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CALIBRATION PROCESS, OSCILLOGRAPHIC
RECORDER - (Continued)
Span accuracy..............................................................
Linearity........................................................................
Electrical limits..............................................................
Step response ..............................................................
Final procedure ............................................................
SECTION I
IDENTIFICATION AND DESCRIPTION
2. Calibration Data Card (DA Form 2416).
1. Test Instrument Identification. This bulletin provides
instructions for the calibration of Oscillographic Recorder
a. Forms, records, and reports required for
(Hewlett-Packard Type 7402A) and Medium Gain DC
calibration personnel at all levels are prescribed by TM
38-750.
DA Form 2416 must be annotated in
10554731 The manufacturer's instruction manual was
accordance with TM 38-750 for each calibration
used as the prime data source in compiling these
performed.
instructions. The equipment being calibrated will be
referred to as the TI (test instrument) throughout this
b. Adjustments to be reported on DA Form 2416
bulletin.
are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R)
a. Model Variations. Variations among models are
described in test.
will follow the designated adjustment. Report only those
adjustments made and designated with (R).
b. Time and Technique. The time required for this
calibration is approximately 5 hours, using the dc and low
3.
Calibration Description.
TI parameters and
performance specifications which pertain to this
.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Dc balance
Input:
0 volts; output: 0 volts
Attenuator balance
Input:
30 volts peak-to-peak; output:
null
Dc calibration
Gain:
0.5% of full scale value
Sensitivity vernier span
dicated per-millimeter-division value
Dc to 40 Hz flat < 3dB down at 55 Hz
2