User Interface - Sensor Electronics SEC3120 Instruction And Operation Manual

5. USER INTERFACE

User Inputs – Magnetic Switches:
The SEC3120 has three (3) magnetic switch pickups on the Display PCB. The picture below shows the
locations of the magnetic switches labeled UP, DOWN and ENTER. Placing a magnet in close proximity
to one of the switches will cause the following operations to occur.
Switch
ENTER
UP
DOWN
LED Indicators:
There are two multi-color LEDs that indicate Alarm and Fault status. The Alarm LED indicates the current
alarm status individually for each sensor, regardless of the Relay Mode. The alarm state LEDs toggle
indication for each sensor along with the sensor information display. When sensor one information is
displayed, the alarm-state LEDs indicate the alarm status for sensor one. When sensor two's information
is displayed, the alarm-state LEDs indicate the alarm status for sensor two. The color of the Alarm LED
indicates the Alarm level; Low Alarm = Yellow, Mid = Amber and High = Red. The fault state LED toggles
with the sensor information display as well, except when a SEC3120 Transmitter unit fault exists. In fault
condition, this LED is Red.
LCD Screen:
The LCD screen is a grayscale display with a 5/8 inch by 2 inch viewing area. It displays the gas type,
range, measured gas concentration and status information for each sensor and the display unit. It has a
contrast potentiometer that is accessible behind the faceplate on the Display PCB positioned just above
the LCD display. The front faceplate must be removed to access it. This potentiometer allows the user to
increase or decrease the display contrast, making it more visible under varying ambient light conditions and
personal user preference.
Operator Manual
SEC3120 Digital Transmitter
Operation
Enter Menu Mode, Selects a menu to Enter
Moves up through Menu selections
Moves down through Menu selections
Page 9 of 40
Sensor Electronics Corporation
P/N 1580281
Rev 10, 20150707