Operator Manual
Page
30
of
40
P/N 1580281
SEC3120 Digital Transmitter
Sensor Electronics Corporation
Rev 10, 20150707
being rebooted and normal power up initialization will
occur.
Toggle LEDs (Locator)
The
toggle LEDs function (typically referred to as ‘Locator
Function’) is normally generated by the SEC3500
operator interface. It can be used at the SEC3120 to
function as a lamp test. Selecting ENTER will turn the
Locator on. The Alarm and Fault LEDs will flash red and
green alternately.
Selecting ENTER again will turn the Locator function off.
Toggle Relays
Selecting ENTER will display the toggle relays menu.
The user can select the desired relay to test and
toggle its activation ON or OFF using the UP and
DOWN switches.
ENTER on ‘PREVIOUS MENU’ to return to the
Diagnostics Menu.
11.
Selt-Test Menu (Selected from the Main Menu)
The self-test function will make the sensor generate a 4-20mA current into the SEC3120 from 4mA
to 20mA (0-fullscale). In the self-test mode the SEC3120 outputs are fully functional. The SEC3120
will display the rising gas level, the 4-20 mA output will increase to 20 mA, the relays will activate
and the RS485 information will be transmitted to the control system.
Move the cursor to SELF TEST and select ENTER to
open the self-test menu.
The self-test can be run on sensor 1, sensor 2 or
both sensors simultaneously.
During the self-test the display will be normal with the exception that the bottom line will indicate
that self-test is being run.
Example:
Self-test running on both sensors.
SELF TEST will display
In the status line for the given sensor under test, if only sensor one is in self-test, then the SELF
TEST will only appear for SENSOR one. Otherwise if it is sensor two, then the status line will only
*
PREVIOUS MENU
*
LOW
ON/OFF
MID
ON/OFF
HIGH
ON/OFF
FAULT
ON/OFF
REBOOT SYSTEM
*
TOGGLE LEDS ON/OFF
TOGGLE RELAYS
PREVIOUS MENU
REBOOT SYSTEM
TOGGLE LEDS
*
TOGGLE RELAYS
PREVIOUS MENU
S1
ID: 001
0-100
%LEL
METHANE
SELF TEST
10.4
HIDE LOW GAS
*
SELF TEST
SET DATE TIME
PREVIOUS MENU
* ON SENSOR: ONE/TWO/BOTH
CANCEL REQUEST
ABORT TEST
START SELF TEST
