Section III. OPERATION UNDER USUAL CONDITIONS

TM 11-6625-539-14-4

Operators

control.

2-7. Preliminary Starting Procedure

the cover. These are used for in-circuit testing of

devices.

a. Unsnap the latches that secure the cover to

the test set (fig. l-l); remove the cover.

2-8. Battery Replacement

Batteries must be installed before initial opera-

NOTE

tion. If the battery test check indicates that bat-

Batteries must be installed before initial

teries are depleted during subsequent operation,

operation. Refer to paragraph 2-8.

replace them as follows:

b. With the polarity switch in the OFF position,

a. Loosen the six captive screws (1, fig. 2-2) that

check the zero adjustment of the meter pointer. If

secure the battery compartment cover (3) to the

it is not zeroed, use a screwdriver to turn the

rear of the unit; remove the cover.

meter zero adjusting screw as required to zero the

b. Remove the six size D dry cell batteries (2)

meter mechanically.

drom the battery holder and discard them.

c. Operate the BAT CHK switch in the direction

c. Install the new dry cell batteries (2) into the

of the arrow and hold it while checking the indica-

battery holder; be sure to observe the polarity

tion of the meter. It should read in the BAT CHK

marked on the battery holder in the case. The

area. If it fails to indicate in this area, the batter-

bottom side is marked + and the top side is

ies are defective and must be replaced. Refer to

marked . Install batteries with polarities shown

paragraph 2-8. If the battery check indication is

marginal, check batteries while circuits are loaded

to assure that sufficient power is available.

d. Reinstall the battery cover (3) using the six

captive screws (1).

d. Remove the three electrical test leads from