Whites TM 808, Инструкция по эксплуатации

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Description of Controls
The THRESHOLD control turns the TM 808 On and OFF and adjust
the volume of the background hum, or as it is commonly called, the "threshold".
Turning the THRESHOLD control clockwise the power is turned ON and the bat-
teries automatically check on the METER for a few moments. For the TM 808 to
operate properly, battery test must indicate in the upper yellow highlighted area
of the METER. In average temperatures, new batteries will provide
approximately 12 hours of continuous use. In cold climates, battery life
will be reduced. The THRESHOLD control must be adjusted for a slight
background sound or THRESHOLD that is heard continuously during searching.
The THRESHOLD control should be adjusted to give a barely audible
hum. A slightly lower setting is used with headphones, and slightly higher when
used without headphones, particularly when being used in a high noise environ-
ment. A setting in the NORMAL area will usually be appropriate. Generally,
the lower the THRESHOLD can be set while still hearing a slight hum, the
better. The THRESHOLD may fade over changing ground indicating the PUSH
BUTTON on the handle needs to be squeezed and released which will return or
reset the THRESHOLD hum. This resetting may be needed at regular intervals,
unless AUTOMATIC THRESHOLD is on AUTO which automatically maintains
THRESHOLD.
THRESHOLD
ZUMBIDO
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