Section II. EQUIPMENT REQUIREMENTS

TB 11-6625-2932-35

(Calibration

Data Card) must be annotated in

appear. Report only those adjustments made and

accordance

with TM 38750 for each calibration

designated with (R).

performed.

Calibration Description. TI parameters and

b. Adjustments to be reported on DA Form 2416 are

performance specifications which pertain to this

designated (R) at the end of the sentence in which they

calibration are listed in table 1.

TABLE 1. Calibration Description

Test Instrument Parameters

Performance Specifications

Scale

in % (percent).

Measuring range

20%

Error with bias

100% approx. 20 ms.

Distortion measurement

equal to or less than 0.25%

Error with transfer

100% + 20 ms.

Time measurement

equal to or less than 1%

Relay excitation

25 Hz sinusoidal current (30 Hz in special version

for 60 Hz power frequency).

Energizing voltage ( no load)

44 V.

Relay energizing current

equal to or less than 20 mA.

Power voltage

110/125/150/220/240V + 10%.

Power frequency

50 Hz + 1%. (special version: 60 Hz + 1%.

approx. 20 VA.

Power drain

Section II. EQUIPMENT REQUIREMENTS

specifications listed in table 2. The accuracies listed in

4. Equipment Required. Table 2 identifies the specific

table 2 provide a four-to-one accuracy ratio between the

equipment used in this calibration procedure. Alternate

standard and the TI.

items may be used by the calibrating activity when this

equipment listed in table 2 is not available. The items

5. Accessories Required. The accessories listed in

selected must be verified to perform satisfactorily prior to

use and must bear evidence of current calibration. The

table 3 are to be used in this calibration procedure.

equipment must meet or exceed the minimum use

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/Model nr. and/or Mfg

Audio Oscillator

Frequency: 210 to 225 Hz.

HP 205 AG (Not available in the

Output: 20 to 30 Volts

mobile calibration facility)

Digital Oscillator

Range: 0 to 1000 Volts ac

HP 3490A

Accuracy: +2%

Oscilloscope

Dual trace capability

HP 180D or Tek RM561A

Variable Transformer

Range: 0 to 220 Volts*

(not available in the mobile cal-

ibration facility) Use a 220 volt

monitored source

*Recommend the use of a 220 volt transformer during depot repair, overhaul or rebuild.

TABLE 3. Accessories Required

Item

number

Common name

Description

Clip, adapter

Banana jack to alligator clip (red)

Clip, adapter

Banana jack to alligator clip (black)

Lead, electrical (2 required)

Banana plug terminations (nominal length)

Oscilloscope probes (2 required)

Part of oscilloscope A3