14
15
4.
OPERATING INSTRUCTIONS
8)
Remove hose from monitor and allow alarm check gas to be purged from monitor
with fresh air.
9)
Clear Peaks or, if “ALARM TYPE” is set to “TWA ON”, clear memory
(Please see
Section 4.7 Clearing Memory
).
4.4 CONTINUOUS MONITORING
Zellweger Analytics recommends that the supplied dust filter (Part number 16PFC) be
attached at all times in pump mode if the instrument is being used in a dusty environment.
Keeping dust out increases instrument life and lowers maintenance costs.
M U L T I G A S D E T E C T I O N
Figure 5
Alarm Check Gas
4.
OPERATING INSTRUCTIONS
4.5 REMOTE SAMPLING (PRETESTING)
Remote areas and confined spaces may be sampled in pump mode prior to entry by
connecting the supplied 10-foot or longer sampling hose to the inlet fitting. The sampling
hose is usually used for pretesting only. Continuous monitoring with the sampling hose
attached reduces the number of hours of run time available.
The following procedure is recommended:
1)
Turn instrument on and allow to enter normal operating mode.
2)
Be sure you are in pump mode. (“P” indicated in line 4 of display).
3)
Test alarm function with gas as indicated in
Section 4.3 Testing Sensors and Alarms
..
4)
Test low flow alarm as indicated in
Section 4.3 Testing Sensors and Alarms
.
5)
Connect sampling hose to instrument. Place hose in area to be sampled.
6)
Wait two minutes for full response.
7)
Take readings.
8)
Retrieve hose and disconnect from instrument.
Hose lengths up to 100 feet may be used for pretesting. Add one second per foot to the
two-minute wait for full response.
4.6 ALARMS
In the event of a gas alarm, evacuate the area immediately. Investigate the cause of the
alarm only when you are safely out of the potentially hazardous area. Accessing the “Peak”
mode will display the gas and level that generated the alarm.
1)
A “warning” low gas alarm indicates a gas concentration above the low alarm set
point and is indicated by 3 beeps from the horn, flashing LED, flashing gas range of
the sensor in alarm, and display of the word “WARNING.”
2)
A “danger” high gas alarm is indicative of a gas concentration above the high alarm set
point and is indicated by 3 beeps from the horn, flashing LED, flashing gas range of the
sensor in alarm, and display of the word “DANGER.”.
3)
Low flow or pump fail alarm is indicated by a continuous audible alarm, flashing LED,
and the words “LOW FLOW” or “PUMP FAIL” displayed.
4)
Low battery alarm is indicated by 2 short beeps from the horn every 15 to 20
seconds, together with the words “LOW BATTERY’ on the display. It first occurs
approximately 30 minutes prior to battery depleted alarm and shutdown.
5)
Battery depleted alarm is indicated by 5 audible beeps, display of “BATTERY DEPLETED”
and shutdown.
CAUTION
Gas/Bump test should be performed in a well-ventilated area.
