EX-5155
ENMET
2.0 Features of the EX-5155-MOS
See Figure 1 for location of features:
Feature
Description
Display
Gain Potentiometer
(POT)
LCD: Indicates the level of gas detected by sensor
POT 1: Display contrast adjustment
POT 2: Does Not apply to MOS, not used
Do not adjust
POT 3: Does Not apply to MOS, not used
Do not adjust
POT 4: MOS Heater Voltage,
Do not adjust unless advised by
ENMET
LED indicators:
Visual Alarms
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator Red LED, user adjustable
Magnetic Switches
Sensor
M
ENU
: Advances the instrument display through menus (Zero, Span, Exit)
S
ELECT
: Selects the Zero, Span, Exit menu or sets proper calibration values for Zero or Span
For sensing gas at
PPM
or LEL levels, see
Table 3
for sensor types
Magnetic switches control the instrument maintenance functions. The switch locations are indicated by
M
ENU
and
S
ELECT
. A
magnetic field pulse is applied by momentarily putting the end of the magnet in proximity to the switch and then removing it.
Referred to as tap. Since the magnetic field penetrates the window, the enclosure cover is not removed in order to perform calibration.
Three alarm points are preprogrammed into the
EX-5155-MOS
sensor/transmitters. At each alarm point, an LED on the front panel is
activated. These internal alarm settings are independent of the 4-20mA output alarm values that can be set at a controller.
POT 1
Power /Fault
Display
3 Alarm
Indicators
POT 3
POT 4
Menu
Select
M
ENU
Magnetic switch
POT 2
Internal PCB View
Sensor
Note:
POT 2 and POT 3 are not used
with EX-5155 MOS
S
ELECT
Magnetic switch
Do Not Adjust
External View
Figure 1: EX-5155-MOS Features
Manual Release Date –
November 26, 2018
Manual Part No. – 80003-098
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