TELEDYNE OLDHAM SIMTRONICS OLCT 80 d, User Manual

Page: 73 / 116

OLCT 80
GAS TRANSMITTER
USER MANUAL
NPO80GB
Revision F.1
67
6.3.3 Verification
This pertains to catalytic sensors if the Verification setting has been activated for the channel (see
page Erreur ! Signet non défini. or Erreur ! Signet non défini.).
•
For safety reasons, when measuring a gas concentration
above 100% LEL, the word "
sup" will appear on the display
and the fault and alarm indicator lights will illuminate.
Meanwhile, the reading will be interrupted and the output
signal will remain at 23.2 mA.
•
To exit this mode (after verifying the absence of an explosive
atmosphere using a portable explosimeter for instance),
press
ENTER on the IR20 remote control. Once "ACQUIT ?"
appears, press
ENTER again. The alarm indicator lights will
turn off and the alarm relays will switch to non-alarm
positions.
Figure 56: detection of high
LEL concentration.
6.4 Acknowledging an alarm
•
For alarms configured for
Manual acknowledgment, point
the infrared remote control to the sensor reporting the alarm
and press
ENTER. The word "ACQUIT ?" will appear on the
display. Press
ENTER again to acknowledge the alarm. The
alarm indicator lights will turn off and the alarm relays will
switch to non-alarm positions if the measurement has fallen
below/risen above the defined alarm threshold.
Figure 57: press
ENTER
on the
reading to acknowledge an
alarm.
•
The user can press
ESC to leave the menu without
acknowledging the alarm(s).
Figure 58: alarm
acknowledgment diagram.