ISA-40M Oxygen Monitor
ENMET
Corporation
1
1.0 Introduction
1.0 Introduction
The
ISA-40M
system is designed to monitor the oxygen content of atmospheres in the vicinity of MRI (Nuclear
Magnetic Resonance) equipment. Air contains 20.9% oxygen by volume; if oxygen in the air is displaced by a liquid
cryogen (such as nitrogen) leak in MRI equipment, the oxygen deficient atmosphere could become hazardous to
human life. To minimize the effects of magnetic fields generated by MRI equipment, LED's and brass hardware are
used in the
ISA-40M
.
The
ISA-40M
system employs galvanic micro-fuel cells as oxygen detection transducers. The output current of each
cell increases or decreases according to the partial pressure of oxygen in the surrounding air, which corresponds to the
oxygen content. The system monitors the oxygen content continuously, and if the oxygen content at any sensor location
drops to the alarm point (usually 18.0% by volume), the instrument provides audio and visual alarms at the control unit.
An audio alarm also occurs at the sensor location. Internal relay contacts can be used to activate additional alarm signals
and/or external equipment. Oxygen content from 16% to 26% by volume is constantly displayed by meters on the
control unit. The
ISA-40M
system is an alarm device which minimizes the risk of harm or death to personnel by
warning them of a hazardous oxygen deficient atmosphere with enough time for them to take action.
An
ISA-40M
system consists of a number of identical channels of oxygen deficiency detection. Each circuit cell
combination makes up a separate channel.
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.
Each plug-in circuit board contains the circuitry for two channels.
ISA-40M
instruments described in this manual can
contain up to 4 channels. This particular manual is for the
ISA-40M-1
through the
ISA-40M-4
.
N
OTE
:
All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the
ISA-40M
and examine it for shipping damage. If such damage is observed, notify both
ENMET
customer service
personnel and the commercial carrier involved immediately.
Regarding Damaged Shipments
N
OTE
:
It is your responsibility to follow these instructions. If they are not followed, the carrier will
not honor any claims for damage.
q
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in good condition.
q
When it was picked up by the carrier at
ENMET
, it legally became your company’s property.
q
If your shipment arrives damaged:
•
Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and request
immediate inspection of the carton and the contents.
•
After the inspection and after you have received written acknowledgment of the damage from the carrier, contact
ENMET
Customer
Service for return authorization and further instructions. Have your Purchase Order and Sales Order numbers available.
q
ENMET
either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage, usually
$100.00. Repair or replacement charges above that value are your company’s responsibility.
q
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.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify
ENMET
Customer Service within 5 days of receipt at
the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270
734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the
ISA-40M
is received as ordered. If there are
accessories on the order, verify that they are present. Check the contents of calibration kits. Notify
ENMET
customer service
personnel of any discrepancy immediately.
1.3 Serial Numbers
Each
ISA-40M
is serialized. These numbers are on tags on the equipment and are on record in an
ENMET
database.
