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Related Manuals for ENMET ISA-40M
Summary of Contents for ENMET ISA-40M
- Page 1 ENMET Corporation ENMET PO Box 979 Ann Arbor, MI 48106-0979 ISA-40M Oxygen Monitor For MRI Scanner Applications For P/N’s 04615-001 04615-101 04615-002 04615-102 04615-003 04615-103 04615-004 04615-104 80015-102 revised, 08/16/91 MCN-204, 04/16/99 MCN-256, 06/07/01 MCN-270, 12/17/01...
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Page 2: Table Of Contents
5.0 M ...................... 11 AINTENANCE 5.1 Cell Aging............................11 5.2 Cell End-of-Life..........................11 5.3 Circuit Alignment ..........................11 5.4 Circuit Breakers / Fuse........................13 6.0 ISA-40M S ..................14 PECIFICATIONS 7.0 S ..................14 ERVICE NFORMATION 7.1 Replacement Part Numbers ......................14 7.2 Return for Repair.......................... -
Page 3: Introduction
ISA-40M-2 has two identical circuits with related oxygen cells; likewise, an ISA-40M-4 has four channels. If the cell is enclosed in a remote sensor, each cell can be located in a separate area up to 1000 feet from the instrument enclosure. The cells are connected to the control unit electrically by wire or cable. -
Page 4: Features
Relay Reset Button Cover Screws Channel 1 Gain 4 places Potentiometer Channel 1 Alarm LED (red) Channel 1 Audio Alarm Power LED (green) (Horn) Channel 1 Gain Meter Gain Relay Reset Button Gain Relay Reset Gain Figure 1: ISA-40M Control Unit Exterior... -
Page 5: Installation
12 V is standby power source; current will flow only when the power is interrupted. Table 1: Power Supply Wiring Power supply ISA-40M Control Unit connection 110 V TB5 HOT 110 V TB5 NEUT EUTRAL AC ground... -
Page 6: Converting To 220 Vac Power
ENMET Corporation ISA-40M Oxygen Monitor 3.1.1 Converting to 220 Vac 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
In case of cell warranty problems, refer to this serial number. : If all channels are used with remote sensor assembly, remove the O2 Cell Circuit Board from the interior of the ISA-40M. Reference Table 2 channel 1. -
Page 8: Remote Sensor Assembly Wiring
ENMET Corporation ISA-40M Oxygen Monitor 3.2.2 Remote Sensor Assembly Wiring See Figure 4 for location of terminal blocks. Table 2: Remote Sensor Assembly Wiring Channel Signal Control Unit Connection Sensor Connection Oxygen Cell (–) TB1 – 1 O2 – TBS – 3 Oxygen Cell (+) TB1 –... -
Page 9: Oxygen Cell Installation For Remote Sensors
3.2.2 Oxygen Cell Installation for Remote Sensors For some ISA-40M systems, single channel systems, and all multichannel systems, remote sensors are connected to the control unit via wiring. To connect these assemblies to the control unit, see the Wiring Information table on the previous pages. -
Page 10: Relay Outputs
The contacts supplied are dry, with a rating of 2 Amp continuous, 5 Amp surge. Do not overload the ISA-40M power supply by connecting it through the relay contacts to an inappropriate load. See Wiring Information Tables 3 & 4 and Sections 3.3.1 and 3.3.2 and the Figure 6 Utilizing Relay Contacts. -
Page 11: Non-Latching Relays
ISA-40M Oxygen Monitor ENMET Corporation 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 12: Operation
4.1 Rough Test An oxygen alarm can be triggered to verify the alarm point by exhaling over the cell. If the ISA-40M includes a remote sensor, two people are required to verify the alarm point, one at the sensor assembly and the other at the control unit. -
Page 13: 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 14 ENMET Corporation ISA-40M Oxygen Monitor 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 15: Circuit Breakers / Fuse
The circuit breakers are rated at 1 amp, and the fuse is rated at 50 milliamps (slow blow). When the fuse or a circuit breaker opens the circuit, the power supply to the ISA-40M is interrupted. All LEDs on the front of the instrument are off. -
Page 16: Isa-40M Specifications
ENMET Corporation ISA-40M Oxygen Monitor 6.0 ISA-40M Specifications 6.0 ISA-40M Specifications Control Unit Specifications 110 V (or 220 V Power if transformer standouts are reconfigured), 50/60 Hz, and/or 12 V , 20 watts max. (5 watts per channel) Alarm Horn and red LEDs on Control Unit. -
Page 17: Return For Repair
ENMET Corporation 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 18: 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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