SECTION II CALIBRATION

DA Form 2116 (Calibration Data Card) in accordance

adjusted which cannot be reached from external ports

with TM 38-750.

provided on the unit under test.

b. Unit Under Test. Test Sets, Relay TS-1194/U

5. Differences Among Models . Slight differences

and TS-1194A/U will be referred to as unit under test

exist in electrical and maintenance parts; however,

both models may be calibrated by this procedure.

c. Removal. Do not remove the unit under test

from its protective case unless necessitated by

equipment connections and/or components to be

SECTION II

CALIBRATION

6. Equipment Required. Equipment required for

(4) Adjust the MANUAL control clockwise for a full-

calibration performance checks and adjustments is listed

scale indication on meter M2 of the unit under test.

in table 1. When any of the equipment listed in table 1

(5) The ME-202/U should indicate a dc voltage

is not available, an equivalent calibrated item may be

between 3.76 and 4.24 volts.

used.

(6) Position the MANUAL control to the center

Table 1. Equipment Required for Calibration

position (0 indication on M2) and reverse leads to the

Performance

ME-202/U.

Checks and Adjustments

(7) Adjust the MANUAL control counterclockwise for

A. Authorized Calibration Equipment

a full-scale indication on meter M2 of the unit under test.

Nomenclature

Federal Stock Number

(8) The ME-202/U should indicate between 3.76

Resistance, decade......................................... 6625-553-7652

and 4.24 volts.

Voltmeter, Electronic ME-202/U .................... 6625-709-0288

B. Authorized Accessories

(9) Repeat above steps with the decade resis-

Nomenclature Federal Stock Number

Description

tance set to 6,000 ohms and the METER RANGE switch

Adapter..................... 5935-081-8025

3 wire power cable to 2 wire.

on the unit under test at 2.5.

Adapter..................... 5935-987-5922

BNC jack to dbl banana plug.

Cable assembly rf ... 5995-889-1305 , BNC plug to alligator clips.

(10) The ME-202/U should indicate between 14.1

Test Lead Set........... 6625-356-0223

and 15.9 volts.

Note

(11) Repeat above steps with the decade resis-

Personnel should familiarize themselves with the

tance set to 20,000 ohms and the METER RANGE

entire procedure before performing calibration.

switch on the unit under test to 1.0.

7. Preliminary Procedure. Energize the equipment

(12) The ME-202/U should indicate between 19.2

and allow 15 minutes for warmup and stabilization.

and 20.8 volts.

Note

b. Adjustments. No adjustment can be made.

When the performance check (a

9. Bias Test. a. Performance.

below ) is within tolerance, do not

(1) Position controls on the unit under test as

perform

the

corresponding

indicated in (a) through (e) below.

adjustment (b below).

When the

performance check is not within

(a) FUNCTION switch at BIAS.

tolerance, perform the corresponding

(b) TEST switch in upper position.

adjustment be- fore continuing with

(c) COIL switch at 3-2.

the calibration procedure. When the

(d) DRIVE VOLTAGE at LOW.

performance check is not within

(e) AC DRIVE control in center position.

tolerance and no adjustment is

Caution

specified, the deficiency must be

When connecting the ME-202/U, open

corrected before continuing with the

the ac third wire (ground bus), or

procedure.

connect the ME-202/U to the

8. Manual Sensitivity . a. Performance Check

powerline with adapter 5935-081-

(1) Position controls on the unit under test as

8025, with the ground wire dis-

indicated in f(/) through (e) below.

connected.

Connect the decade

(a) FUNCTION switch at MANUAL position.

resistance with the unit under test

(b) METER RANGE switch at 10.

disconnected from the powerline.

Do not touch the decade resistance

(d) COILS switch at 3-2.

connections while the equipment is

(e) MANUAL control in center position.

in operation.

A potential shock

(2) Set the decade resistance to 400 ohms and

hazard exists between the decade

connect to terminals 2 and 3 of RELAY receptacle on

resistance and grounded

(metal)

the unit under test.

components

of the ac power

distribution system .

(3) Connect the ME-202/U positive lead to terminal

3 and the negative lead to terminal 2 on the decade

resistance.