Teledyne OXYGEN DETECTOR 319R - Manual (Page 9)

5
319R Installation & Operation 2.0
TELEDYNE BROWN ENGINEERING
Analytical Instruments
Alarm Terminal Connection
SPDT relay contacts are provided for each of the 3 alarms. There are
9 terminals available on the back panel of the system for alarm circuit
connection. The explanation for the relay terminals abbreviations is as
follows:
NC = Normally closed
C = Common
NO= Normally open
The alarm relay circuits are designed for failsafe operation, meaning
that the relays are activated (energized) during normal operation. If power
fails, or if an alarm setpoint is exceeded, the relay will become de-ener-
gized.
Sensor Installation or Replacement
CAUTION: The sensor electrolyte is caustic. Do not let it come in contact
with skin. If it does, immediately flush affected area with water.
Consult the Emergency First Aid procedures in the Material
Safety Data Sheet in the Appendix.
Do not attempt to open or repair the sensor. Leaking or ex-
hausted sensors should be disposed of in accordance with
local regulations. Please refer to the Material Safety Data Sheet
in the Appendix to learn about potential hazards and corrective
action in case of accident.
To install the cell:
1. Turn the unit off by placing the power switch (on the rear panel
of the analyzer) in the OFF position.
2. Disconnect the red and black leads from the terminal strip.
Remove the spent cell by pulling up on it and twisting slightly.
3. Remove the new Micro-Fuel Cell from its protective bag.
CAUTION: Do not scratch, puncture, or damage the sensing membrane of
the Micro-Fuel Cell sensor. Damage to the membrane will
require replacement of the sensor.
4. Attach the red lead of the new cell to terminal #1 and the black
lead to terminal #2.
5. Replace the cell on the cell holder by pushing and twisting until
it strikes bottom.