Boonton Electronics 71A, 71AR - Operating Instructions

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SECTION III
Operating Instructions
3.1 Initial Installation
3.1.1 Unpacking
On unpacking~ inspect the instrument for possible damage in
transit. If the instrument is damaged~ contact your local
Sales Engineering Representative or the factory (see title
page for factory address) for further instructions. If no
damage is found~ the instrument may be put into service by
the following procedure:
3.1.2 Mechanical Zero Adjustment
with the instrument unpowered and in a normal operating
position~ check to see that the indicator needle rests at
zero. If not~ set to zero by adjusting the mechanical
zero control on the meter housing.
3.1.3 Turn-on Procedure and Warm-up
Plug the instrument into a source of 117 V (±10%) 50/60 HZ
power and push the front panel ON button. (Note: The
translucent red center button of the ON switch also serves
as the pilot light. This switch is turned off by pulling
the outer black disk outward. It should be noted that this
switch also serves as the fuse holder. (To remove the fuse~
turn the switch off~ twist the black ring counterclockwise~
and withdraw the assembly.) The instrume~t may be operated
approximately 30 seconds after turn-on. However~ for maxi-
mum accuracy~ a warm-up of approximately a half-hour should
be allowed.
3.1.4 Initial Installation Checks and Adjustments
3.1.4.1 General
Before the instrument is put into service, there are
several initial checks which should be made~ and~ if
necessary, adjustments perfor.med:
3.1.4.2 (a) Allow an initial warm-up of a half hour.
(b) Set the Llc selector to C.
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71A
c