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20 Instruction 3015-4286
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.
Working with 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
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.
14.72 * AMB14.81
0.09dif <0000>
Manifold Pressure
∗
Stored Ambient Pressure
Pressure Difference Fault Code