Specifications

SF
6
Portable Monitor
22 Instruction 3015-5150
3.14 Working with the P-CHK Function
3.14.1 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.
3.14.2 Keypad Functions
From the Data Display screen, press both the Keypad Left and Right buttons at the same time to
display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it
points to the P-CHK function, and then press ENTER to display the Pressure screen.
The Keypad Left button toggles the purge valve open and closed. Note that an asterisk (*) appears when
the purge valve is open causing the monitor to draw air from the purge-air bag.
The Keypad Down 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).
3.14.3 Screen Display
Current Manifold Pressure – Current manifold pressure in psia.
Stored Ambient Pressure – Stored ambient pressure in psia.
Pressure Difference – Difference between the current manifold pressure and the stored ambient pressure.
Fault Code – Current fault code (page 19).
Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Keypad Left
button. An asterisk appears on the display when the purge valve is open causing the monitor to draw air
from the purge-air bag.
14.59 AMB14.75
-0.16dif <0000>
Current Manifold Pressure ∗ Stored Ambient Pressure
Pressure Difference Fault Code