ENMET ISA-44-RAL-OD - Manual (Page 22)

ENMET Corporation ISA-44RAL-OD / ISA-44RAH-OD
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7.4 Hydrocarbon Filter Replacement
The charcoal absorption filter for hydrocarbons will need periodic replacement. The length of time between
replacement depends on the instrument usage and VOC (Volatile Organic Compounds) level in the breathing air supply.
For ISA-RAL monitors that are in continuos air streams, 24 hours, 7 days a week 365 days a year it is recommended
that the filter be replaced when any of these conditions occur:
•
At least annually
•
Any time fluid is found inside the filter
•
Any time the filter is damaged
•
If any odor is detected in the breathing mask
8.0 Specifications 8.0 Specifications
Specifications are subject change without notice
M AXIMUM P OWER
♦
117 Vac, 60 Hz, 25 watts
♦
12 Vdc, 25 watts
R ELAY C URRENT 2 amp steady, 5 amp surge @ 110Vac
MOS S ENSOR L IFE Up to 3 years in clean air (no oil)
R ESPONSE T IME Up to 5 minutes for low-level carbon monoxide gas
calibrations
M AXIMUM A IR
L INE P RESSURE 250 PSIG (ISA-44 RAL-OD)
S AMPLE F LOW R ATE Approximately .4 SCFH (
Standard Cubic Foot Hour)
O XYGEN M ICRO -F UEL C ELL
linearity error (0 – 100 % oxygen) less than 0.5%
at 0% oxygen less than 2.0 ua
nominal (in air @ 25 degrees C) 175 ua
O UTPUT
variation from nominal +20%
R ESPONSE T IME
@ 25 D EGREES C (T YPICAL ) 90% 30 seconds
O PERATING T EMPERATURE R ANGE 32 - 125 degrees F
E XPECTED L IFE up to 12 - 14 months in air
ENMET W ARRANTY 6 months
8.1 Typical Calibrations
Hazardous Gas Low Level Alarm Threshold High Level Alarm Threshold
Carbon Monoxide 10 or 20 ppm 20 or 50 ppm
Oxygen Deficiency 19.5%
8.2 Options and Variations
O PTIONS
♦
220 Vac power input connection
V ARIATIONS
a) Available in an explosion-proof instrument housing, Models ISA-44-RALE-OD and ISA-44AHE-OD. With this, the
equipment is suitable for operation in Class I, Division I, Group C and D atmosphere, as defined in the National
Electrical Code. Units for Group B are available upon special order. DO NOT use the standard ISA-44RAL-OD
where you are required by the National Electrical Code or local codes to use an explosion-proof variety.
b) ENMET Filtration Panels filter oil, water and solid particles from compressed air.
•
AFS-50: equipped to distribute air to four respirators.
Ask for product bulletin on air purification and monitoring systems.