ENMET EX-5120 - Manual (Page 4)

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
3 Alarm
Indicators Power /Fault
Indicator
Display
M ENU
Magnetic switch
S ELECT
Magnetic switch
Sensor
External View
Menu Select
POT 3
See Note
POT 4
See Note
POT 2
See Note
POT 1
Display Contrast
Internal PCB View
Note: POT 2, POT 3and POT 4
are not used, Do Not Adjust