ENMET EX-5100 User Manual

Page 4

ENMET

Corporation

EX-5100 C

OMBUSTIBLE

2.0 Features of the EX-5100

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: Combustible Sensor Zero adjustment, See Sections 3.2 and 5.4
POT 3: Combustible Heater Do not adjust unless advised by

ENMET

POT 4: Used with EX-5150-MOS (High 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

ENU

: Advances the instrument display through menus (Zero, Span, Exit)

ELECT

: Selects the Zero, Span, Exit menu or sets proper calibration values for Zero or Span

Sensor

For sensing LEL levels of gas, see Table 2 and 3 for sensor types

Magnetic switches control the instrument maintenance functions. The switch locations are indicated by

ENU

and

ELECT

. A

magnetic field pulse is applied by momentarily putting the end of the magnet in proximity to the switch and then removing it.
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-5100

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.

Internal PCB View

External View

Figure 1: EX-5100 Features

Power /Fault

Indicator

Display

ENU

Magnetic switch

3 Alarm Indicators

ELECT

Magnetic switch

Sensor

Note: See Section 6.0

Replacement Parts for
sensor identification

Menu

Select

POT 3

POT 4

POT 2

POT 1

Note:

POT 1, 3 & 4 shown

for reference only.
Do Not Adjust