FIRE
R M LD
FIRE
R M LD
Operator’s Manual
17
GAS LASER
Doc No. 16162 Rev A, GAS LASER Operator Manual
© 2021 Teledyne Gas Measurement Instruments Ltd. All rights reserved.
Working With Menu Items
Audio Mode
Self Test
To turn off DMD mode:
- Press the MENU button
- Select AUDIO MODE
- Select Disabled
NOTICE: DMD Mode will enable
automatically after 5 minutes,
enabling audible and color
border indicators.
NOTICE
WARNING
WARNING: When DMD is
disabled, the instrument
will not alarm with audible
or visible indicators.
AVERTISSEMENT: Lorsque
le DMD est désactivé,
l’instrument ne déclenchera
pas l’alarme avec des
indicateurs sonores ou
visibles.
AVERTISSEMENT
Please refer to list shown here for the page number location of each menu item.
Self Test...................................page 17
Audio Mode ...........................page 17
Alarm Level ............................page 18
USB ...........................................page 18
Bluetooth ................................page 18
WiFi ......................................... page 19
Data Logging ...................... page 20
Time Zone Offset .............. page 20
Peak History ..........................page 21
Display Background ...........page 21
About .......................................page 21
DMD (Digital Methane Detection)
Digital Methane Detection (DMD)
is a highly sophisticated detection
algorithm that greatly enhances the
use of the Gas Laser. The factory
default setting for DMD is Enabled
(on).
While using DMD mode, an audio alarm
will be heard, and on-screen indicators
(flashing/color-changing
readings
and screen border) will be seen when
methane detection occurs.
DMD will indicate detection
when the PPM-M exceeds the
Alarm Level, or when the reading
is excessive. While the low light
warning is sounding, the Gas Laser
may still be able to detect very large
gas concentrations, indicated by
frequent, fast beeps.
The adjustable Alarm Level controls
the DMD. Your department’s scanning
procedure may require the use of a
specific value or procedure to set it.
Set the Alarm Level such that the
false detection rate is low, while not
too high that leaks are missed.
Please refer to page 14 for detailed instructions on performing a Self Test.
Audio Warning Indications
The instrument emits a constant
beep to indicate instrument-level
warnings and/or fault conditions.
A warning will also be displayed
on screen. The most common
warnings are:
- Low signal return/low light level
- Over saturation of signal
- Low battery
If low signal return/low light
occurs, then change angle or
move in closer to get in range.
If over saturation, then back
up from the target or point the
device at a less reflective surface.
Should the warning(s) persist in
the instrument, check the display
and follow the instructions in the
troubleshooting guide on page 29.
