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.
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.
(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.
(c) TEST switch in upper position.
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.
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