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Vertex M
24-Point Continuous Monitor
TM
A.1 Detectable Gases
Vertex M System Chemcassette
listed in Table C-1 varies based on the programmed alarm levels. This period is valid only after the system pulls
a new Chemcassette
®
For accurate detection, gas must be present at sufficient levels and durations. Typical response times are shown
in this table at 2 TLV, which will vary in duration depending on the target gas and alarm level settings. For high
concentrations (greater than full scale) a minimum of 4 seconds is required.
Gas Name 1
TLV
Ammonia II
25 ppm
(NH
)
3
Ammonia XP
25 ppm
(NH
)
3
Ammonia XP4
25 ppm
(NH
)
3
Arsine
5 ppb
(AsH
)
3
Arsine
(AsH
)
5 ppb
3
Dry
Arsine XP
(AsH
)
5 ppb
3
Low Level
Arsine XP
5 ppb
(AsH
)
3
TLV - Threshold Limit Value
1. "-1" calibrations allow more stain development but will extend response times
2. Minimum Sample Time
Appendix A - Detectable Gases
analyzers are continuous monitoring instruments. The initial analysis period
®
window. Increasing the programmed alarm levels will decrease the initial sample period.
Default
LAL
LDL
Alarm
Level 1
3 ppm
3 ppm
25 ppm
1.5 ppm
1.5 ppm
25 ppm
1.5 ppm
1.5 ppm
25 ppm
5 ppb
5 ppb
50 ppb
7 ppb
5 ppb
50 ppb
0.5 ppb
0.3 ppb
2.5 ppb
3 ppb
2.5 ppb
50 ppb
LAL - Lowest Alarm Level
LDL - Lower Detectable Limit
Default
Alarm
Range
Alarm Setting
Level 2
3-49.9 ppm
50 ppm
0-75 ppm
50-75 ppm
1.5-49.9 ppm
50 ppm
0-150 ppm
50-150 ppm
1.5-49.9 ppm
50 ppm
0-150 ppm
50-150 ppm
5-500 ppb
100 ppb
0-500 ppb
7-99 ppb
100-199 ppb
100 ppb
0-500 ppb
200-500 ppb
0.5-1.9 ppb
2-4.9 ppb
5 ppb
0-50 ppb
5-9.9 ppb
10-50 ppb
3-500 ppb
100 ppb
0-500 ppb
C-2
Time to 1 TLV
Initial
(Alarm @ 2 TLV
Chemcassette
Analysis
Concentration
Period
10-ft. Sample
(second)
Line)
10
<20 sec
10
10
<20 sec
10
10
<20 sec
10
<20 sec (Alarm
@ 50 ppb with
30
100 ppb AsH
3
gas)
<35 sec (Alarm
60
@ 50 ppb with
30
100 ppb AsH
3
15
gas)
300
150
<45 sec
60
30
<20 sec
(Alarm @ 50 ppb
30
with 100 ppb
AsH
gas)
3
Part
Number
1295-0221
1295-0405
1257-9309
1295-0300
1295-0300
1295-0226
1295-0226
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