Detcon X40-32-N7 - Manual (Page 17)

Model X40
Model X40 Instruction Manual Rev. 3.3 Page 11 of 64
Set Channel Alarms
All sensors have three alarm settings ALM1 (Alarm 1), ALM2 (Alarm 2) and ALM3 (Alarm 3). The user
establishes the alarm levels for each sensor depending on the range. The values represent the alarm level
set points and entered in 5% increments of the full-scale range selected for that channel. In ascending
mode the relay is activated when the concentration is above the alarm threshold. In descending mode, the
alarm relay is activated when the concentration is below the alarm threshold.
Alarms are usually
ascending, with the exception of oxygen sensors. The alarm ascending level can be either Y (Yes) or N
(No).
Set Relay (Alarm) Functions
The Set Relay Functions menu enables configuration (Latching, Energized and Silenceable) of the relays in
Bank1-8. Each relay bank has three relay outputs for ALM1, ALM2 and ALM3 and a fourth relay output
for the Fault condition. All relays in the bank must be configured for the following three settings:
 Latching or Non-Latching
 Energized or De-Energized,
 Silenceable or Non-Silenceable
Inhibit and Alarm Test Mode
The Inhibit and Alarm Test Mode permits the user to inhibit functionality of alarms in the network,
simulate alarm conditions and verify relay contacts. The Inhibit mode disables alarm outputs while sensor
are being calibrated or tested. The Alarm Test Mode simulates alarm conditions by increasing the gas
readings from zero for all active gas channels at increments of 5% full scale then decrease back to zero and
exit the test mode.
System Diagnostics
The System Diagnostics menu performs complete functionality tests for:
 LCD display
 Panel LEDꞌs
 External reset switch
 Relays
 Modbus™ interface
Time and Date
The Time and Date menu enables the user to effortlessly establish the time and date. The time will be
displayed as military time (24hrs) in hours, minutes and seconds. The date will be displayed as the month,
day and two digit year. If the time and/or date are not correct, they can be updated.
View TWA and Peak
The View TWA and Peak menu permits viewing the recorded time weighted average (TWA) and peak
readings for each channel represented by its assigned gas sensor. The data is recorded on the SD card with
the date, time, channel number, TWA and peak readings each time the controller polls a sensor. Data on
the SD card is viewed by using the Detcon Log File Viewer application on a computer.
1.12 Optional Remote Alarm Reset/Acknowledge Switch
An optional remote Alarm Reset/Acknowledge switch enables the user to reset or acknowledge alarms
without having to open the X40 enclosure. The switch is a normally open push button mounted on the
bottom or side of the NEMA 4X enclosure. For the N1P and N7 enclosures, the switch must be mounted
externally (e.g. bottom of the J-Box).