CM4 Four-Point Continuous Monitor
CM4 Technical Manual
8-10
If there is a problem with the CID number or the Chemcassette
®
, the
display will show one of the following messages:
Message
Cause
Recovery
Imminent
Fault
Inst
Maint
UNKNOWN
Chemcassette
®
User pressed ESCAPE or ENTER instead of
entering a number
Retype CID number Unchanged
INVALID NUMBER CID mistyped
Retype CID number Unchanged
IMPROPER
Chemcassette
®
Wrong tape for gas family
Use different
Chemcassette
®
Y
N
Chemcassette
®
EXPIRED
Time since mfg too long
Use newer
Chemcassette
®
N
Y
CC PAST EXPIRY
Time since mfg twice too long
Use newer
Chemcassette
®
Y
N
Chemcassette
®
STALE
This CC previously installed and out of bag too
long (See Table 8-2)
Use newer
Chemcassette
®
N
Y
CC VERY STALE
This CC previously installed and out of bag
twice too long (See Table 8-2)
Use newer
Chemcassette
®
Y
N
CC EXP FLT IN
XX DAY
This CC will be expired or stale before it is
consumed, in XX days.
Replace
Chemcassette
®
before
XX days elapse
None
Imminent
When the correct CID has been entered, press the ENTER key. The
display will read:
OPEN GATE/REPLACE CC
After opening the gate, the display reads:
CHANGE CC/CLOSE GATE
After installing the carrier with a new Chemcassette
®
(see
for information on loading Chemcassette
®
) and closing the Gate
Load Lever, the following is displayed:
ADVANCE? 1=Y
7. Press either:
• 1 to advance the Chemcassette
®
five windows to verify proper
threading/loading or
• 0 to exit the LOAD Chemcassette
®
function without
advancing the tape.
The CM4 returns automatically to the Service Menu.
8. After replacing Chemcassette
®
, always verify the optics (see
) and set the sample flow (see
).
Description
Part
Number
Lifetime
In Bag
(days)
Out of Bag
(days)
Hydrides
874300
183
35
Mineral Acids
874337
183
35
Ammonia
874402
183
16
Phosgene
874307
183
35
Hydrogen Sulfide
874304
183
35
Hydrogen Cyanide
847510
183
16
Hydrazine
874347
183
35
Aliphatic Amines/Ammonia
874342
183
35
Chlorine/Oxidizers
874007
183
16
Fluorine/Oxidizers
1874-9306
183
35
Sulfur Dioxide
874568
183
35
XP4-C Hydrides
1258-9300
365
130
XP4-C Mineral Acids
1258-9310
365
130
XP4-C Ammonia
1258-9309
365
130
XP4-C Chlorine
1258-9308
365
130
XP4-C Phosgene
1258-9307
365
130
XPC Hydrides
1874-9300
365
100
XPC Mineral Acids
1874-9310
365
100
XPC Ammonia
1874-9309
365
100
XPC Chlorine
1874-9308
365
100
XPC Phosgene
1874-9307
365
100
Table 8-2: Chemcassette
®
Lifetimes
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