B.2 Leak Check Procedure - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor

B.2 Leak Check Procedure

Purpose
Use the Leak Check procedure to verify leak integrity from the end of
sample line to the optics block. All fittings, transducers connections
and sample lines are verified leak tight to approximately 22 inches
Hg (560 torr) of vacuum.
Items Required
• Flowmeter 0-5 Lpm with two lengths of 1/4-inch (6.35 mm) O.D.
tubing attached (two 1/8 NPT to 1/4-inch fittings required)
• End of line plugs consisting of four 1/4-inch tube unions and
five male plugs
• Sealing gasket to be installed in optics block (3.5 x 2 x .06
rubber)
NOTE:
Items required for performing a Leak Check should be available
at most installation sites. Contact Honeywell Analytics service
department for assistance in specifying or supplying parts
needed.
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 4–SERVICE MENU, choose the subfunction 6–SET
FLOW.
4 – SERVICE MODE
6 – SET FLOW
NOTE:
CM4 display ignored.
3. Open gate, remove Chemcassette and remove filter
assembly.
CM4 Technical Manual
4. Install gasket in optics and close load lever.
5. Install flowmeter as follows:
• Connect tube "A" exiting top of flowmeter to vacuum supply
(See Figure B-1)
• Connect tube "B" exiting bottom of flowmeter, to desired
point 1 to 4.
NOTE:
A full scale reading should be present.
6. Block the sample line of the same point your flowmeter is
connected to using the union and plug.
NOTE:
Float in flowmeter will drop to 0 or oscillate, indicating a leak
tight system.
2
1
Figure B-1: Internal Manifold (Front/Top Edge)
7. Move tube "B" to next desired test point and repeat step 7.
NOTE:
Individual testing is recommended to ensure location is
consistent with labeling.
8. Remove plug on completion of last point.
B-8
Vacuum
4
3