TB 9-5855-1890-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Thermal Collimator, SM-D-805691 (p/o AN/TAM-3 and AN/TAM-3A) and
Infrared Collimator, SM-D-969722. TM 9-5855-255-14 was 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. All models must have lights extinguished in bar target mode.
Some models have a disabling switch; on other models the lights have been removed. If TI
does not have a disabling switch and bar target is illuminated, corrective action must be
taken by DS/GS unit.
b. Time and Technique. The time required for this calibration is approximately 4
hours, using the physical 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. 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 table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Temperature: 4.5 C (ambient to heater)
Temperature differential
Deviation: 0.45 oC
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286, AN/GSM-287 or AN/GSM-705. Alternate items may be used
by the calibrating activity when the equipment listed in table 2 is not available. 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
standard and TI. Where the four-to-one ratio cannot be met, the actual accuracy of the
equipment selected is shown in parenthesis.
