ETS-Lindgren HI-3520 Microwave Monitor (Archived) - Manual (Page 14)

Page 10 HI-3520 Manual
beep and the flash rate are directly proportional to the RF
field strength. Note that once the alarms start, they latch
at the minimum flash rate, continuing to warn of an over
exposure situation even it the RF field that initially caused
the alarm is no longer present. In order to reset the alarm
function, it is necessary to turn the unit OFF and back ON
using the ON-OFF switch. If it is desired to disable the
latch function, follow the turn-on procedure described in
section 3.4 except depress and hold the MODE switch
before placing the ON-OFF switch to the ON position.
3.12 Built-In Test Functions
The unit generates a beep and flash at turn on to verify
that the alarm indicators are functioning. At this time, all
segments of the LCD display are enabled to indicate that
the display is operating properly. Ten seconds after turn
on. the unit will generate a second beep and flash which
indicated that it is operational. A low battery condition
is indicated if the unit beeps and flashes two times after
the ten second period. To verify, check the LCD display
for a "BAT" indication. In addition, the battery condition
is tested automatically every minute. Should the battery
measure low, the "BAT" indicator will flash and the unit
will beep and flash once a minute. Refer to Section 5.0
for battery replacement procedures.
The unit also contains continuous fault detection circuitry
to alert the user to a RF detector failure. In that event,
the beeper and light will start to beep and flash at a
constant tone and light, and the LCD display will indicate
"FAIL". The unit is no longer usable in this condition and
should be turned off and serviced.
Archived 4/2/10