ENMET ISA-44-RAL-OD - Manual (Page 20)

ENMET Corporation ISA-44RAL-OD / ISA-44RAH-OD
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7.0 Routine Maintenance 7.0 Routine Maintenance
Since the ISA-44RAL-OD/RAH-OD is a safety instrument, it requires periodic testing and recalibration. Refer to
Operation and Calibration sections of this manual for testing and recalibration procedures.
A T R EGULAR I NTERVALS :
1. Rotate operation switch to P URGE O N . This interval varies with the amount of contaminants present in the air
system, but purge for at least 10 minutes. Rotate operation switch to O PERATE when purging is complete.
2. Check the unit for mechanical damage or obvious malfunctions (i.e. burned-out lamps).
3. Check the oxygen channel response periodically.
4. Check the water level and verify air bubbles.
5. If the unit will not operate, check the fuse (See Figure 2). If this fuse is cracked or broken, replace it (ENMET part
no. 64004-001). If the instrument remains inoperative after this fuse is replaced, send the instrument in for repair.
7.1 Replacement Parts
Table 4: Replacement Part Numbers
Description ENMET Part #
Metering Orifice Assembly (s/n below 2311) 03415-000
Orifice 03415-001
Pressure Regulator 73089-000
Humidifier RAL Regulator Assembly 03406-000
Male Coupler Plug (quick-release fitting) 73061-000
Gauge (0 - 30 psi) 73089-003
Red, Lamp/LED-for units with s/n 2271 and below 52006-003 *
Green, Lamp/LED-for units with s/n 2271 and below 52006-001 *
Amber, Lamp/LED-for units with s/n 2271 and below 52006-002 *
Lamp-for units with s/n 2283 and above 63001-002
Lens, Red-for units with s/n 2283 and above 62012-001
Lens, Green-for units with s/n 2283 and above 62012-002
Lens, Amber-for units with s/n 2283 and above 62012-003
5 wire RAL-OD Cable Assembly (without oxygen cell) 03042-109
CO Meter 03411-000
Oxygen Meter 03411-005
Oxygen Cell, S-2 67013-008
Hydrocarbon Filter with hardware 73089-060
Fuse 1 Amp 64004-001
* Replaces 12RC lamps will appear different
7.2 Calibration Equipment
Table 5: Calibration Gas Part Numbers
Description ENMET Part Number
10 ppm CO in air 03219-010
20 ppm CO in air 03219-020
50 ppm CO in air 03219-050
200 ppm CO in air 03219-200
20.9% oxygen in nitrogen 03296-209
17.0% oxygen in nitrogen 03296-170
Calibration Gas Fixture 03605-001
Carry Case 73083-000