TB 11-6625-2836-35
c. Time and Technique. The time required to perform this calibration is approximately 2 hours using the dc low
frequency technique.
2. Calibration Data Card (DA Form 2416). a. Forms, records, and reports required for calibration personnel at all levels
are prescribed by TM 38-750. DA Form 2416 must be annotated in accordance with TM 38750 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
Table 1. Calibration Description
Test instrument parameters
Performance specifications*
Power input
105 to 125 vac, 60 HZ.
Power drain
1 watt @ 117 vac.
68.06 fixed; 0.02 MHz.
Oscillator frequency and stability
71.94 fixed; + 0.02 MHz.
25 kHz; 2 kHz.
Switching frequency and stability
*These specifications are for information only and are not necessarily verified in this procedure.
Section II. EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment used in this calibration procedure. Alternate items may
be used by the calibrating activity when this 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 listed in table 2. The accuracies listed in table 2 provide a four-to-one accuracy
ratio between the standard and the TI.
5. Accessories Required. The accessories listed in table 3 are to be used in this calibration procedure. When
necessary, these items may be substituted by equivalent items, unless specifically prohibited.
Table 2. Equipment Required
Item
Minimum use
Calibration equipment
number
Common name
specifications
Type nr and/or mfg. Nr.
A1
Multimeter
Range: O to -50 volts
ME-26 ( )/U, Hewlett-Packard
Accuracy: 4%
Model 410B or C.
Table 3. Accessories Required
Item
Description
B1
Test Lead
Test lead, red, supplied with multimeter A1, with alligator clip adapter.
B2
Test Lead
Test lead, black, supplied with multimeter A1, with alligator clip adapter.
Section III. PRELIMINARY OPERATIONS
6. Preliminary Instructions. a. The instructions outlined in this section are preparatory to the calibration process.
Personnel should become familiar with the entire bulletin before beginning the
b. Items of equipment used in this procedure are referenced within the text by common name and item identification
number as listed in tables 2 and 3. For the identification of equipment referenced by item numbers prefixed with A, see
WARNING
HIGH VOLTAGE is used during the performance of this calibration.
DEATH ON CONTACT may result if personnel fail to observe safety
precautions.
NOTE
Unless otherwise specified, all controls and control settings refer to the
TI.
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