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Summary of Contents for ENMET ISA-40 Series
- Page 1 ENMET Corporation ENMET PO Box 979 Ann Arbor, MI 48106-0979 ISA-40 ISA-40 Oxygen Monitor Oxygen Monitor Manual 80015-001 12/05/91 MCN-204, 01/19/99 MCN-277, 07/01/02...
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Page 2: Table Of Contents
Table of Contents 1.0 I ......................1 NTRODUCTION 1.1 Unpack..............................1 1.2 Check Order............................1 1.3 Serial Numbers........................... 1 2.0 F ......................2 EATURES 3.0 I ......................3 NSTALLATION 3.1 Control Unit Mounting and Power Hook-up ................3 3.1.1 Converting to 220 V Power ....................4 3.2 Oxygen Cell Installation........................ -
Page 3: Introduction
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping company when asked to do so in writing by our customer. If you need your shipments insured, please forward a written request to ENMET Customer Service. -
Page 4: Features
ENMET Corporation ISA-40 Oxygen Monitor 2.0 Features 2.0 Features See figure 1 for location of features Feature Description Meter A Oxygen (O2) concentration meter. The scale is marked in percent by volume O2. Audio Alarm(Horn) Audio alarm (2900 Hz ,95 dB at 2 ft.). The audio alarm is on when the unit is in alarm. -
Page 5: Installation
ISA-40 Oxygen Monitor ENMET Corporation 3.0 Installation 3.0 Installation This equipment is not for use in hazardous combustible atmospheres as defined by the national ARNING electrical code. Use in such atmospheres may result in property damage, injury or death Mounting Holes... -
Page 6: Converting To 220 Vac Power
ENMET Corporation ISA-40 Oxygen Monitor 3.1.1 Converting to 220 V Power The input of the transformer must be changed in order to accommodate 220 V power. This is accomplished by changing the wiring between four standoffs located under a protective cover next to the transformer, shown in Figure 1. -
Page 7: Oxygen Cell Installation
ISA-40 Oxygen Monitor ENMET Corporation ISA-40 Interior View O2 Cell Circuit Board Remove Shoring w/cell installed on circuit side Clip or Spring Bottom View O2 Sensor • • Center Pin – Negative • • Outer Pin + Positive O2 Cell... -
Page 8: Remote Sensor Assembly Wiring
ENMET Corporation ISA-40 Oxygen Monitor 3.2.2 Remote Sensor Assembly Wiring See Figure 4 for location of terminal blocks and optional intrinsic safety barrier. Sensor assemblies with intrinsic safety barriers cannot have an audio alarm. Table 2: Remote Sensor Assembly Wiring (without Intrinsic Safety Barrier) -
Page 9: Figure 4: Interior View Of Sensor Assembly
ISA-40 Oxygen Monitor ENMET Corporation O2 Cell O2 Cell Circuit Board w/cell installed on circuit side Remove Shoring Clip or Spring ISA-40 Interior View Optional Intrinsic Safety Barriers Bottom View O2 Sensor • • Center Pin – Negative IS1 –1 •... -
Page 10: Oxygen Cell Installation For Remote Sensors
10. Remove the cell serial number tag from the plastic oxygen cell package and retain. This is a warranty record (up to six months from date of shipment from ENMET). 3.2.4 Oxygen Gain Adjustment 1. Four hours or more after installing the oxygen cell, use a screwdriver to turn the oxygen gain adjust, on the front of the control unit enclosure. -
Page 11: Intrinsic Safety
ISA-40 Oxygen Monitor ENMET Corporation 3.2.6 Intrinsic Safety The output of the oxygen deficiency transducer cell is approximately 175 micro-Amps at 0.05 V in fresh air. Therefore, the cell itself is not a source of ignition. If the cell leads are accidentally connected across 110 V , the cell explodes and becomes an ignition source. -
Page 12: Non-Latching Relays
ENMET Corporation ISA-40 Oxygen Monitor 3.3.1 Non-Latching Relays There is one non-latching, single pole relay per channel. These relays furnish normally open, normally closed, and common terminals, which are available on TB3 and TB4; refer to the motherboard drawing. These relays are fail-safe;... -
Page 13: Operation
ISA-40 Oxygen Monitor ENMET Corporation 4.0 Operation 4.0 Operation Install and power the unit as previously described in section 3.0 through 3.3.3. The green lamp on each channel is an indication that power is on and the unit is not in alarm. The red lamp indicates alarm, which is usually set at an oxygen content of 18.0%. -
Page 14: Maintenance
The only tools necessary are a digital voltmeter and a small screwdriver. This procedure is given for an S-2 oxygen cell, ENMET P/N 67013-008 as furnished as a replacement cell; this cell has a grey label. Refer to Figure 7 for test point and potentiometer locations. - Page 15 ISA-40 Oxygen Monitor ENMET Corporation 1. Null adjust: Disconnect the oxygen cell from the circuit by disconnecting leads at TB1 or TB2 as shown below: Channel Disconnect Terminal Positions TB1 – 1 O2 (+) and TB1 – 1 O2 (–) TB1 –...
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Page 16: Circuit Breakers / Fuse
(usually 18.0% oxygen by volume). If the oxygen alarm does not come on at this point, repeat the entire procedure checking terminal connections, test points, and voltage settings very carefully. If it still does not alarm, contact your local authorized ENMET service center. -
Page 17: Isa-40 Specifications
A full set of replacement part numbers and prices are a part of the documentation which accompanied the order. A partial list of the most likely parts needed to maintain the equipment is as follows: ENMET Part Number Description 67013-008 Oxygen Cell, S2, that has a gray label;... -
Page 18: Return For Repair
ISA-40 Oxygen Monitor 7.2 Return for Repair ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty service work. -
Page 19: Warranty
8.0 WARRANTY 8.0 WARRANTY ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and expendable parts such as calibration gas, filters, batteries, etc...
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