Single Zone Gas Monitor
P/N: 3015-4256 Rev 13
25
3.6. Clearing the Stored PPM Log, Alarm and Fault Data
Up to 200 gas measurements, and 30 alarm and fault events are stored by the monitor.
To clear stored data, first display the data to be cleared by using the
PPM LOG
,
ALARMS
or
FAULTS
function (page 22). Next, press the
Right Arrow Keypad
and
ENTER
buttons at the same time. A single,
long tone should be heard when the data has been successfully cleared.
3.7. Reset to Factory Default Settings
IMPORTANT!
Performing this function will delete all program parameters, alarms, faults,
and ppm log files.
With AC power removed from the monitor, press and hold down the Factory Default Switch (pages 10
and 11). Apply AC power and listen for a beep and then a long tone. Release switch. At this time the
monitor will purge the IR bench and auto set the IR detector voltage to its baseline 0 ppm value.
After warming up, reprogram the SZ monitor to the desired settings as needed.
3.8. The P-CHK Function
3.8.1. Overview
The
P-CHK
function (Pressure Check Function) (page 22) is useful to a service technician for
troubleshooting a flow fault problem. The monitor will trigger a flow fault if the pressure drop from ambient
is less than 0.02 psi during a purge cycle, and 0.06 psi during a measurement cycle.
3.8.2. Keypad Functions
From the
Data Display
screen, use the
Keypad
buttons to place the arrow (>) on the display next to the
P-CHK
function. Then press
ENTER
to display the
Pressure
screen.
The
Left Arrow Keypad
button toggles the purge valve open and closed. Note that an asterisk (
∗
)
appears when the purge valve is open (purging).
The
Down Arrow Keypad
button toggles the pump ON and OFF.
Pressing the
ENTER
button stores the current manifold pressure shown on the left to the ambient
pressure shown on the right (must be done with the pump OFF).
3.8.3. Screen Display
Manifold Pressure
– Current manifold pressure in psia.
Stored Ambient Pressure
– Stored ambient pressure in psia.
Pressure Difference
– The difference between the current manifold pressure and the stored ambient
pressure.
Fault Code
– Current fault code (page 23).
Purge Valve Asterisk (
∗
)
– When viewing the
Pressure
screen, the purge valve can be opened and
closed by pressing the
Left Arrow Keypad
button. An asterisk appears on the display when the purge
valve is
open
.
14.72 * AMB14.81
0.09dif <0000>
Manifold Pressure
∗
Stored Ambient Pressure
Pressure Difference
Fault Code
