TB 9-6625-2284-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Night Vision Device (NVD) Detector Standard (APN 13335470). DA Form
3758 and engineering technique 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 and 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.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
7 V/(W cm -2 sr -1 )
Radiance responsivity at 820 nm
4.73 x 10
10%
1.51 x 107 V/(W sr -1 ) 11%
Intensity responsivity at 810 nm
Noise
NTE 0.02 mV
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. Alternate items may be used by the calibrating
activity. The items selected must be verified to perform satisfactorily prior to use and must
bear evidence of current calibration. The equipment must meet or exceed the minimum use
1
between standard and TI. See footnote at table 2 . Where the four-to-one ratio cannot be
met, the four-to-one accuracy will be listed, and the actual accuracy of the equipment
selected is shown in parenthesis.
5. Accessories required. The accessories required for this calibration are common usage
accessories, issued as indicated in paragraph 4 above, and are not listed in this calibration
procedure. The following peculiar accessory is also required for this calibration: Collar,
NVD Alignment, PN 13440057.
