Section II. CALIBRATION

TB 11-6625-2488-50/1

c. Equipment and Accessory Identification. The

General Instructions.

DA Form 2416

(Calibration Data Card). During the use of this bulletin,

equipment and accessories referred to throughout this

bulletin are identified in tables 1 and 2 and section III.

annotate DA Form 2416 in accordance with TM 38-750.

d. Equipment Setup. Disconnect instructions are

b. Unit Under Test. Fifty watt amplifier, Krohn-Hite

not contained in this bulletin.

Model DCA-50, will be referred to as the UUT (unit under

test) throughout this bulletin.

Section II. CALIBRATION

5. Equipment and Accessories Required. Table 1

provided to assist in the selection of required equipment

and accessories. For specific item identification refer to

lists minimum use specifications of equipment required

section III.

for calibration performance checks and adjustments.

Table 2 lists required accessories. Tables 1 and 2 are

Table 1. Minimum Specifications of Equipment Required

Item

Common name

Minimum use specifications

number

0 to 5% at 1 Hz to 1 500 kHz

DISTORTION

RANGE:

± 3%

ANALYZER

ACCURACY:

SQUARE-WAVE

RANGE:

2 to 1000 Hz

± 1%

GENERATOR

ACCURACY:

OSCILLATOR

1 Hz to 500 kHz at 10 volts, minimum 2

RANGE:

± 2%

ACCURACY:

1 Hz to 800 kHz 3

TEST

RANGE:

±2

OSCILLATOR

ACCURACY:

OSCILLOSCOPE

RANGE:

Dc to 500 kHz

± 3%

ACCURACY:

VOLTMETER

RANGE:

-10 to + 10 volts dc

± 1%

ACCURACY:

DECADE

RANGE:

400 to 500 ohms

± 2%

RESISTOR

ACCURACY:

0 to 103 volts ac at 1 Hz to 800 kHz 4

THERMAL

RANGE:

TRANSFER

ACCURACY:

AUTOTRANS-

RANGE:

105 to 125 volts ac

± 1%

FORMER

ACCURACY:

A10

DC VOLTAGE

RANGE:

0 to 103 volts dc

STANDARD

ACCURACY:

Procedure limitation: 5 Hz to 500 kHz.

Procedure limitation: 5 Hz to 100 kHz.

Procedure limitation: 10 Hz to 800 kHz.

Procedure limitation: 5 Hz to 800 kHz.

Combined accuracy of A8 and A10 is 1% output regulation check and 0.38% for voltage gain and frequency response check.

Two required