Teledyne Oldham MX 16, User Manual

Page: 20 / 60

MX 16
ANALOG AND DIGITAL CONTROLLER
USER GUIDE
16 NP16EN
Revision: A.0
Alarm Reset Key (H)
Press this key to silence the on-board buzzer and reset the alarms that can be acknowledged.
This reset button can be remote, see paragraph
Remote Acknowledgement connector on page
22
.
Alarm Thresholds and Relays
It is possible to modify a programmed alarm level via the MX 16’s user interface (Program menu).
Internal Relays and Buzzer
■
2 Alarm relays are available. These relays are not configurable and are activated on the
appearance of any alarm.
■
1 Fault relay is available. This relay is not configurable and is activated on the appearance of
any failure. The Fault relay is powered in normal operation mode so it does switch over in the
event of a power supply failure.
■
The internal buzzer is activated on the appearance of any event (failure or alarm). The sound
differs depending on the event: continuous in fault mode, discontinuous in alarm mode and
frequency increases according to the alarm level that is reached. The internal buzzer can be
deactivated permanently through the user interface.
Alarms Settings
■
2 alarm levels
■
Each alarm is increasing (Toxic and Combustible gases) or decreasing (O
2
).
■
Each alarm is configured as an instantaneous alarm without hysteresis.
■
One over range alarm (OVS:
over scale)
■
One under range alarm (UDS:
underscale)
■
One “no ambiguity” alarm (for flammable gas detectors and concentrations above 100% LEL)
Alarms may be programmed for manual acknowledgement (except OVS, UDS, “no ambiguity”).
Alarms Manual Acknowledgement
In this mode, Alarms must be reset by the operator. Alarm management (relays, visual indicators,
buzzer) is as follows:
Event Display Alarm Relay
(normal mode)
Alarm LED Internal buzzer
Alarm
Appearance AL(1,2)
grayscale mode Activated Blinking ON