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Clearing the Stored PPM Log, Alarm & 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 15). 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.
The P-CHK Function
Overview
The P-CHK function (Pressure Check Function) (Page 17) 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 0.2 psi
during a purge cycle, and 0.5 psi during a measurement cycle.
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).
Screen Display
14.72 * AMB14.81
0.09dif
<0000>
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 19).
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.
20
∗
Manifold Pressure
Stored Ambient Pressure
Pressure Difference
Fault Code
Instruction 3015-4286
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