Section 8 Audit
Pressing
←
F3
on the second Main Menu screen brings you to the Audit
menu. The Audit menu allows you to choose between a Leak Check
procedure, a Flow Rate Audit, a Temperature Audit, and a Barometric
Pressure Audit. Pressing
ENTER
will return to the second Main Menu.
8.1 Leak Check on Module C
Audit Mod:[1]
F1=Leak Ck F2=Flow
F3=Temp. F4=BP
ENTER=Back
This section provides instructions for performing a leak check on the Module C. For instructions on how
to perform a leak check on a Collocated Module C, refer to section 8.2.
8.1.1
Maximum Allowable Leak Rate
The maximum allowable Leak Rate for the URG-3000N is 2.5% of the nominal flow rate of 22Lpm. The
internal volume of the Module C components is approximately 1.2 Liters. Therefore, the Leak Rate can
not exceed approximately .55 Lpm. This is derived using the following equation.
Leak Rate = V *
Δ
P / t
*
P
ATM
8.1.2 Audit
Cassette
Cartridge/Tray
Installation
Each URG-3000N ships with a cassette cartridge/tray labeled “AUDIT”, to be used during Leak Check
and Audit procedures. Locate and install an Audit Cassette at this time. To do so, press the red “up”
button on the Electronics box to release the current filter cassette. Insert this cassette properly, and press
and hold the red “down” button on the Electronics box to install the Audit Cassette.
NOTE: If you have a Collocated Module C, you will still only have (1) AUDIT cassette cartridge that can
be used on both the Module C and the Collocated Module C.
8.1.3
Beginning Leak Check
Leak Check Mod:[1]
51
From the Main Menu, press the
→
F4
key to proceed to the second Main
Menu, and press the
←
F3
key to enter the Audit Menu. Press
↑
F1
to begin
the Leak Check procedure, displaying the screen on the right.
NO=Cancel ENTER=Next
Leak Check Mod:[1]
Select
Mod: 1
for doing the leak check on the Module C, and
ENTER
to
begin.
Install flow audit
adapter(valve open)!
NO=Cancel ENTER=Next
