Optional Recorder Output

TM 11-6625-2724-12

3-2. Optional Recorder Output

connected to these terminals. The negative terminal

is permanently connected to these terminals. The

The instrument is equipped with a recorder output

negative terminal is permanently connected to the

voltage which is available at rear terminals. The

chassis ground of the ME-202C/U, regardless of the

voltage is from O- to ±1-volt dc and corresponds to

status of the input LOW terminal with respect to

the indication of the null meter. Instruments such as

ground.

center-zero recorders or auxiliary voltmeters may be

Table 3-1. Operator's Controls and Indicators

Section II. OPERATION OF ME-202C/U

3-3. Preliminary Operating Procedures

a. Place the MODE switch to the AC or DC

position that corresponds to the measurement

Perform the following steps prior to placing the

source.

voltmeter into operation for measuring voltage or

b. Connect the circuit to be measured between the

resistance (para 3-4 through 3-7).

HI and LOW INPUT terminals. If one side of the

a. Check to see that the POWER switch is in the

voltage source is grounded, connect the grounded

OFF position.

side to the LOW INPUT terminal.

b. Set the front panel controls as follows:

c. Place the RANGE switch to the lowest range

(1) RANGE control to

possible that maintains an on-scale meter deflection.

(2) MODE switch to + DC.

The meter deflection multiplied by the RANGE

(3) Readout dials to O.

switch position is the value of the measured voltage.

(4) Check mechanical zero of meter, adjust if

Left or right m e t e r deflection during dc

necessary.

measurements corresponds to a negative or positive

(5) Set POWER switch to ON position.

polarity of the measured dc voltage.

(6) Allow the voltmeter to warmup for at least

d. Measurement of ac or dc voltages from .00002

one minute before attempting any measurements.

to 0.1 volts is accomplished on respective NULL

3-4. TVM Mode Operation

SEMS switch positions of 0.001 to 0.1. In this ap-

The ME-202 C/U can be used on the TVM mode to

plication, the RANGE switch is placed to the 1

measure ac or dc voltages from 10 microvolt to 1100

VOLT range and the-readout dials to .00000. The

volts dc with an accuracy of ±3% of the selected

resulting meter deflection multiplied by the NULL

range. Operate the voltmeter on the TVM mode as

SENS switch position is the value of the measured

follows:

voltage.

3-3