14
O&M Manual
Rev-L (7/15)
Part 5 – Operation
5.1
General
To turn the system ON, simply press and hold the MENU key for approximately 5 seconds and
the display will come on.
To turn the unit off, press and hold the ENTER key until the
display shuts off (about 3 seconds). Note that the unit must be in the MEASURE menu in
order for the 3-second key press to operate.
The instrument will turn off automatically after 30
minutes if no keys are pressed
– optimizing battery life. This mode of operation is ideal for
portable operation where intermediate readings are being taken. Assuming the instrument is used
perhaps an hour per day, this would result in a battery lifespan of about 240 hours. For
continuous operation with no automatic shut-off, turn the Auto-OFF feature to OFF in the DIAG
menu. This mode is intended for use when the instrument outputs are used for transmitting data.
In this mode, the instrument will run continuously until the battery reaches the shut-down level
(1.6V). It should be noted that rechargeable AA batteries reduce operational times dramatically,
as they typically contain much less energy than standard batteries.
The PWR switch disconnects the AA batteries and is only used to disconnect the battery if the
system is not to be used for a long period of time (> 3 months of storage). Otherwise, leave this
switch in the ON position. The red dip switch is only for factory use.
The "
B
" will flash on the display next to the main measurement indication when the instrument
requires battery replacement. If the battery is not replaced, eventually the unit may not turn on in
the normal operating mode. Once the low battery condition is indicated, the instrument will only
stay powered for 10 minutes.
4.2
Battery / Power Circuit Board
Q45C2 monitors are powered by internal AA alkaline batteries Figure 5 shows this board
assembly with batteries installed.
The battery circuit board contains 3 switch assemblies as shown in the drawings
.
.
