
EX-5120 ENMET Corporation
2
2.0 Features of the EX-5120
See Figure 1 for location of features:
Feature Description
Display
LCD: Indicates the level of gas detected by sensor
Gain Potentiometer
(POT)
POT 1: Display contrast adjustment
POT 2:
POT 3: Not Used, Do not adjust
POT 4:
Visual Alarms
LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator Red LED, user adjustable
Magnetic Switches
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
Infrared Sensor
For sensing gas at LEL levels, see Section 6.0 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-5120 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.
Figure 1: EX-5120 Features
Indicators
Indicator
Display
ENU
Magnetic switch
ELECT
Sensor
External View
Menu
Select
See Note
See Note
Display Contrast
Internal PCB View
POT 2, POT 3and POT 4
are not used, Do Not Adjust
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