Enmet ISA-44-RAL-OD Instrukcja Użytkownika Pobierz pdf (Strona 22)

ENMET Corporation ISA-44RAL-OD / ISA-44RAH-OD

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 Specifications8.0 Specifications

Specifications are subject change without notice

MAXIMUM POWER ♦ 117 Vac, 60 Hz, 25 watts

♦ 12 Vdc, 25 watts

RELAY CURRENT 2 amp steady, 5 amp surge @ 110Vac

MOS SENSOR LIFE Up to 3 years in clean air (no oil)

RESPONSE TIME

Up to 5 minutes for low-level carbon monoxide gas

calibrations

MAXIMUM AIR

LINE PRESSURE 250 PSIG (ISA-44 RAL-OD)

SAMPLE FLOW RATE

Approximately .4 SCFH (Standard Cubic Foot Hour)

OXYGEN MICRO-FUEL CELL

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

OUTPUT

variation from nominal +20%

RESPONSE TIME

@ 25 DEGREES C (TYPICAL) 90% 30 seconds

OPERATING TEMPERATURE RANGE 32 - 125 degrees F

EXPECTED LIFE up to 12 - 14 months in air

ENMET WARRANTY 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

OPTIONS

♦ 220 Vac power input connection

VARIATIONS

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.

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