Med Touch Series LCD Alarm Systems
Powerex
•
150 Production Drive
•
Harrison, OH 45030
•
USA
P 1.888.769.7979
•
F 513.367.3125
•
www.powerexinc.com
IN597400AV
•
08/2016
Page 15 of 56
Gas Module (Area Alarms)
Other Possible Conditions
Other possible system conditions
may occur in the event of a wiring
problem, sensor problem or board
malfunction. The following codes will
be displayed when a System Error or
Failure is detected, or when the View
Recent History button is pressed:
Alarm
Reason
No Sensor
Sensor wire(s) not connected
No Sensor Data
No data sent within allotted time
Bad Sensor Data
Corrupt data, sensor noise
Wrong Gas Type
Mismatched sensor and gas board
Wrong Pressure
Range
Sensor does not match gas board sensor
selection
Low Pressure
Pressure is below low alarm set point
High Pressure
Pressure is above high alarm set point
Gas Service
(see programming – page 26)
Gas Pressure
The LCD Digital Pressure Display displays the pressure as indicated
by the transducer. The gas pressure may be displayed in PSI, kPa,
BAR, inHg, or mmHg. PSI and inHg is the factory setting.
NOTE:
Vacuum & EVAC/WAGD may be displayed as inHg or mmHg.
Only the applicable unit selection buttons will be active based
on the gas service selected. For example - the PSI, kPa and BAR
selection buttons will be displayed but are not active when a
negative pressure gas has been selected. In kPa mode the Nitrogen
gas display indicates one tenth of the actual pressure when the
pressure exceeds 999 kPa (i.e. 1100 kPa is displayed as 110 and the
kPa and (x 10) appears in the pressure text box.
NOTE:
Alarm settings are maintained even if power is interrupted.
Units of Measure
The Units of Measure is displayed as PSI/inHg, BAR or kPa
(whichever is selected during programming – PSI and inHg is factory
setting) providing the unit of measure displayed on the LCD pressure
reading. In the kPa mode the Nitrogen gas display indicates one
tenth of the actual pressure when the pressure exceeds 999 kPa
(i.e. 1100 kPa is displayed as 110 and the kPa and (x 10) appears in
the pressure text box.
High/Normal/Low Condition Status
Should the line pressure of a gas exceed the programmed alarm
set points for low or high line pressure, the corresponding low or
high line pressure LCD will be illuminated simultaneously with the
buzzer sounding to announce an alarm condition has occurred.
When the line pressure is neither high nor low it is considered
within the normal range and the green Normal LCD is illuminated.
These indications are relative to the high and low pressure set
points which have been programmed into the alarm. These high
and low set points should be set in accordance with NFPA 99 at ±
20% of the normal operating pressure.
Rooms/Area Covered & Alarm/
Emergency Instructions
When in the Normal Condition, the
rooms / area covered information
which has been entered by the
user is displayed. When in an alarm
condition, the emergency instructions
which have been entered by the user
are displayed alternately with the
rooms/area monitored information.
In addition the display will flash on
and off. (see Programming Text – page
27).
NOTE:
This table covers all alarm modules used in both area &
master alarm panels.
Gas Service
Gas Pressure
Units of Measure
Condition
Room/area covered &
alarm/emergency instructions
