TB 9-6625-188-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Night Vision Device (NVD) Detector Standard, Model DYN400.
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. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications
4.83 x 10-8 V/W 10.60%
Responsivity at 810 nm
≤ 0.17 mV
Noise
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with 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 specifications
listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio 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 parentheses.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
Range: 0 and ~+3.5 V dc
Fluke, Model 8846A
Resolution: 10 V
(8846A/G)
Accuracy: 0.5%
Responsivity at 810 nm: 4.83x10-8 V/W
REFERENCE NIGHT
Dynetics, Model DYN400
VISION DEVICE (NVD)
Accuracy: See test report
DETECTOR STANDARD
SOURCE
Intensity at 810 (nominal): 3.03 x 10-8 W/sr
Test Set Electronic Systems
Accuracy: See REFERENCE NIGHT VISION
(modified TS-4348/UV)
DEVICE (NVD) DETECTOR STANDARD
(TS-4348/UV modified)