ENMET EX-5150-MOS User Manual
Page 9
EX-5150-MOS
ENMET Corporation
7
4.1.3 Purge
Purging is a function that temporarily increases the sensor heater voltage to clean off contaminants. Some sensors operate at
higher heater voltages where purging is not required. The
EX-5150-MOS
S/T is configured at the factory for the installed
sensor purging requirements.
Purge times vary form 5 – 25 minutes depending on the sensor installed.
Some sensors require additional purge time after start up. Particularly if the sensor is new or the system powered down for an
extended period of time.
To initiate a purge:
Turn the power off and back on. This will initialize a purge cycle.
See Figure 5 for the Operational portion of the Maintenance Menu Flow Chart.
4.2 Normal Display Mode
When the
EX-5150-MOS
is installed as described in section 3, and in clean air, the
POWER
green LED is on, the display is lit
and the information on the display is measurement of the target gas detected by the
EX-5150-MOS.
The red alarm and fault
LEDs are not lit.
To advance through displays of operational information tap the magnet over the
M
ENU
button.
N
OTE
:
Software revision may cause variations of display output.
See sequence of operational information below:
Display Measurement of the target gas
Tap the magnet over the
M
ENU
button
Display indicates Alarm 1 Set point
Tap the magnet over the
M
ENU
button
Display indicates Alarm 2 Set point
Tap the magnet over the
M
ENU
button
No Function for the
S
ELECT
button
in this mode
Display indicates Alarm 3 Set point
Tap the magnet over the
M
ENU
button
Display indicates mA Span range
(Full Scale)
Tap the magnet over the
M
ENU
button
Display returns to gas measurement
Operational Display Flow Chart
4.2.1 Alarm Conditions
EX-5150-MOS
There are three alarm set points available. These alarm set points can be changed within limits; see the maintenance section of
this manual for the procedure.
If the gas concentration increases above that of the alarm set point, the associated red LED is lit.
0LEL
A1:
10
S
ELECT
S
ELECT
M
ENU
M
ENU
A2:
20
S
ELECT
M
ENU
A3:
50
S
ELECT
M
ENU
mA:
100
S
ELECT
M
ENU