22May2002
Page
11
To
decrement
Signal Output
, hold magnet directly over
DOWN
switch until LCD
display decrements Output Value. When Output reaches 4 mA the next decrement
will roll-over to 20 mA.
To exit
LOOP TEST
, hold magnet directly over
ENTER
switch to return to normal
operating mode.
VI.
Diagnostic Messages:
The LCD display provides the following fault messages during normal operation
Relay Definitions:
The 2-Wire
smarter
Transmitter does not provide local relay outputs. However, external
relays are often used at the controller electronics to provide appropriate alarms at pre-set
alarm points. The following definitions are provided for general information.
Non-latching:
when alarm set point is reached and exceeded, relay is activated (open
contacts close and closed contacts open). When gas concentration falls
Sensor cannot be calibrated—Requires
immediate replacement
Sensor has been disconnected from main
circuit board—transmitter outputs
2.4mA— install sensor as described in
Section III, steps 1-6, above
