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6 GMC-I Messtechnik GmbH
Errors and Extraordinary Strains
If it may be assumed that the instrument can no longer be
operated safely, it must be removed from service and
secured against further use.
Safe operation can no longer be relied upon
if the instrument demonstrates visible damage,
if the instrument no longer functions,
after a long period of storage under unfavorable conditions
.
2 Initial Start-Up
Batteries
Batteries have already been installed to your instrument, and it
is ready for operation. Refer to chapter 16.1, page 24, before
placing your instrument into service for the first time, or after it has
been in storage!
Switching the Instrument On Manually
Ð Press the MENU/ON|OFF key.
Activation is acknowledged with a brief acoustic signal.
As long as the key remains pressed, all segments of the
liquid crystal display (LCD) are active. The LCD is shown
on page 3.
After the key is released, the instrument is ready for
operation
.
Note!
Electrical discharge and high frequency interfer-
ence can cause incorrect displays, and may
block the measuring sequence. To reset, switch
the instrument off, and then back on. If this
procedure is unsuccessful, briefly disconnect the
battery from its contact terminals.
Switching the Instrument Off Manually
Ð Press and hold the MENU/ON|OFF key, until the display is
deactivated.
Deactivation of the instrument is acknowledged by two
brief acoustic signals
.
Automatic Shut-Off
– As battery saving circuit:
Your instrument shuts itself off automatically, if the mea-
surement value remains constant for a long period of time
(max. fluctuation < ±400 digits, 1 °C or 1 °F per minute), and if
none of the keys or the rotary switch are activated for a
period of 10 minutes. Deactivation of the instrument is
acknowledged by a brief acoustic signa
l.
Exceptions are as follows:
Transmit or memory mode, and continuous operation.
– If battery voltage drops below the required level:
The battery symbol ( ) appears approximately 10 minutes
before the instrument is shut down. Connect the NA HIT 2X
mains power pack and save data to a PC before replacing the
batteries.
Disabling Automatic Shut-Off
The instrument can also be switched to “CONTINUOUS ON”.
Ð Simultaneously press the ON/MENU/OFF key and the yel-
low multifunction key when switching the instrument on
.
The “CONTINUOUS ON” function is indicated at the LCD
with the symbol
.
6


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