Allied Radio Knight-Kit 83 Y 140 Посібник з монтажу - Сторінка 5

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SERVICE HINTS

If you

have followed all the previous

instructions

carefully

your KNIGHT

20,000 ohms per volt VOM should operate

properly.

If it does not perform properly

under

the tests

outlined,

here

are

some

helpful hints.

If the DC voltage ranges do not operate

properly,

or are

inoperative,

check all

connections to and the placement of R-19,

45K ohm;

R-20,

150K ohm;

R-21,

800K

ohm; R-22,

4M; and R-23, 15M;resistors.

If the AC voltage ranges

operate

im-

properly,

or are

inoperative,

check all

connections

to CR-1,

the

rectifier,

and

all connections

to and the placement

R-4,

3.75M;

R-5,

1M;

R-6,

200K;

R-7,

37.5K;

and R-8 and R-9 the recti-

fier calibrating resistors.

If the milliammeter

ranges do not op-

erate

properly, or are inoperative, check

the connections

to and the placement

R-11,

25.1 ohm

wirewound

resistor;

R-12, 2.5 ohm wirewound resistor;

R-13,

.225 ohm

wirewound

resistor;

and R-15,

11.0 ohm wirewound resistor.

Should it be necessary to replace R-3,

the

meter

calibrating

resistor,

please

include with your order the four numbers

written on the tape on the back of the

meter

movement.

This

determines

the

value of R-3.

In the unusual case

where

it would be

necessary

replace

CR-1,

the

meter

rectifier,

R-8 or

R-9, the

rectifier

calibrating

resistors, please

order

an-

other

rectifier and

will include

the

proper value of calibrating resistors with

SPECIFICATIONS

D-C Voltmeter:

volt.

To 20 megohms

in 3 scales with

center

scale

values

of 12, 1200

and

120,000

ohms,

respectively.

Ohmmeter:

deep, including knob.

FUNCTIONS

Type of

Ranges

|Measurement

0- 2.5

DIRECT

CURRENT

MA")

Type of

Measurement

DC VOLTS

('DC Vv")

0- 10

0- 10 ma

12 ohms

mid scale

X100

1200 ohms

mid scale

XIOK 120K ohms

RESIST -

DB Range

("AC V"')

0-250

|+10to +43 db

0- 1000 }+22 to +55db

0- 5000 |+30 to +63 db