The Monitor function can be used to keep the ZIPLEVEL
®
from shutting off
during periods of inactivity. It also can be used with the optional PC Serial
Link for remote monitoring or data logging. For example, place the Base Unit
on a Styrofoam
®
oat to log water tank or river levels.
To enter the MONITOR function, press and hold the ON/OFF and CAL keys
together for two seconds when turning on ZIPLEVEL
®
. To exit, turn the unit
off. The MONITOR function disables the AUTO-OFF feature and enables
continuous data from the Serial Port.
CAUTION: MONITOR reduces battery life by at least 40%. Remember to
shut off when nished to avoid loss of battery.
29 ▪ MONITOR DISPLAY ALARM INDICATORS ▪ 30
CAL Flashes if unit needs to be re-calibrated due to a 36F (20C) tempera-
ture change since last calibration. CAL is on constantly when unit is
outside of the -22°F to +158°F (-30C to +70C) operating temperature
range. CAUTION: Vertical measurements may be in error.
--0-- Periodic ash on the display indicates re-zero may be necessary
due to a temperature change of 18F (10C) since the last zero.
8888 Alternates with displayed elevation when the Measurement Module
is more than 20’ (6m) above or below the Base Unit. CAUTION:
Overrange measurements may be in error. If 8888 ashes well
within range, check troubleshooting chart; check for Cord damage
or leakage and if necessary, return for service.
BAT Flashes when only a few hours of battery life remain. A fresh 9V
alkaline battery can allow up to 60 hours of active use.
CORD Flashes to indicate need for routine factory Cord recharge required
about every 3 years or possible Cord damage. CAUTION: Measure-
ments may be in error.
*See page 6 for illustration of alarm indicators.