Introduction - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor

9.1 Introduction

The Maintenance Section includes:
• Chemcassette Maintenance covers the Chemcassette
®
Chemcassette carrier, optics verification, and flowrate check
®
(Section 9.2)
• Filter maintenance covers the replacement of CM4 filters
(Section 9.3)
• Fuse replacement (Section
• Cleaning Chemcassette
• Installing Microtube assemblies
NOTE:
Prior to performing any maintenance procedure, leave Monitor
Mode. (See Section 4.5.1.)
CAUTION
For system integrity, always perform a leak test after any maintenance
procedure. See Section B.2
9.2 Chemcassette Maintenance
®
This section describes maintenance and handling procedures for the
Chemcassette and the Chemcassette
®
Perform the following functions when replacing a Chemcassette
tape:
• Remove carrier
• Verify optics
• Load new Chemcassette
• Install Chemcassette
®
• Check flowrates
CM4 Technical Manual
9.4)
optics (Section 9.5)
®
(Section 9.6)
for leak check procedure.
carrier.
®
in carrier
®
9.2.1 Remove Carrier
To remove the Chemcassette
1. Press PROGRAM to exit Monitor Mode.
,
®
2. From the 4–SERVICE MENU, Choose the subfunction 5–LOAD
Chemcassette .
®
5 – LOAD Chemcassette
If Chemcassette counter is disabled, proceed to step 6. If
®
Chemcassette counter is enabled, the screen displays:
®
3. Press either:
• 1 to re-initialize the counter so that the display shows a fault
when less than 24 hours of Chemcassette
• 0 to continue without resetting counter
If the internal filter timer is active (see
displays:
INT FILTER RESET 1=Y
4. Press either:
• 1 to reset the timer after servicing the filters (see
9.3)
®
• 0 to continue without resetting timer
If the external filter timer is active (see
displays:
EXT FILTER RESET 1 = Y
9-2
carrier from the CM4:
®
4 – SERVICE MODE
RESET COUNTER 1=Y
remains
®
or
Section 7.8.2), the screen
or
Section 7.8.3) , the screen
Section