CM4 Four-Point Continuous Monitor
CM4 Technical Manual
C-2
Gas Name
TLV
LAL
LDL
Default
Alarm
Level 1
Default
Alarm
Level 2
Range
Alarm Setting
Initial
Analysis
Period
(seconds)
Time to 1 TLV
Alarm @ 2 TLV
Concentration
10 Foot Sample
Line
Chemcassette
Part Number
Ammonia II
(NH
3
)
25 ppm
3 ppm
3 ppm
25 ppm
50 ppm
3-75 ppm
3-49.9 ppm
50-75 ppm
10
5
5*
<10 sec
874342
Ammonia XP
(NH
3
)
25 ppm 1.5 ppm 1.5 ppm 25 ppm
50 ppm 1.5-150 ppm
1.5-49.9 ppm
50-150 ppm
10
5
0*
<5 sec
1874-9309
Ammonia XP4
(NH
3
)
25 ppm 1.5 ppm 1.5 ppm 25 ppm
50 ppm 1.5-150 ppm
1.5-49.9 ppm
50-150 ppm
10
5
0*
<5 sec
1258-9309
Arsine
(AsH
3
)
5 ppb
5 ppb
5 ppb
50 ppb
100 ppb
5-500 ppb
5-500 ppb
30
0*
<10 sec (Alarm
@ 50 ppb with
100 ppb AsH
3
gas)
874300
Arsine
(AsH
3
)
Dry
5 ppb
7 ppb
5 ppb
50 ppb
100 ppb
5-500 ppb
7-99 ppb
100-199 ppb
200-500 ppb
60
30
15
1*
<25 sec (Alarm
@ 50 ppb with
100 ppb AsH
3
gas)
874300
Arsine XP
(AsH
3
)
5 ppb
3 ppb
2.5 ppb
50 ppb
100 ppb 2.5-500 ppb
3-500 ppb
30
0*
<25 sec (Alarm
@ 50 ppb with
100 ppb AsH
3
gas)
1874-9300
Arsine XP4
(AsH
3
)
5 ppb
3 ppb
2.5 ppb
50 ppb
100 ppb 2.5-500ppb
3-500 ppb
30
0*
<25 sec
(Alarm @ 50
ppb with 100
ppb AsH
3
gas)
1258-9300
Arsine XP4
(AsH
3
)
Low Level
5 ppb
0.5 ppb
0.3 ppb
5 ppb
10 ppb
0.3-50 ppb
0.5-1.9 ppb
2-4.9 ppb
5-9.9 ppb
10-50 ppb
300
150
60
30
0*
<35 sec
1258-9300
Table C-1: Chemcassette Detectable Gases (cont’d)
* = Minimum Sample Time TLV = Threshold Limit Value LAL = Lowest Alarm Level LDL = Lower Detectable Limit
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