ENMET EX-5150-MOS - Manual (Page 4)

EX-5150-MOS ENMET Corporation
2
2.0 Features of the EX-5150-MOS
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: 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
Visual Alarms LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator LED, Red
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
Sensor 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-5150-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. An optional relay board is available that will activate 0.5 Amp relay contacts at each alarm point, plus a fault relay.
Figure 1: EX-5150-MOS Features
POT 3
See Note
3 Alarm
Indicators Power /Fault
Indicator
Display
M ENU
Magnetic switch
S ELECT
Magnetic switch
Sensor
Sensor ID is stamped
on the sensor collar:
For example 1
12
13
32
Menu Select
External View
XX
POT 4
POT 2
See Note
POT 1
Internal PCB View
Note: POT 2 and POT 3 are not
used with EX-5150-MOS
Do Not Adjust