Sensor Electronics SEC 3100 Manual

Part Number: 1460105
REV: A
SEC 3100 Transmitter
Instruction and Operation Manual
Sensor Electronics Corporation
12730 Creek View Avenue
Savage, Minnesota 55378 USA
[phone] Fax [phone]
Web site www.sensorelectronics.com

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Part Number: 1460105
REV: A
Sensor Electronics Corporation
Sensor Electronics Corporation (SEC) designs and manufactures innovative fixed system gas detection
equipment, for combustible gases, oxygen, carbon dioxide and toxic gases.
Commitment
Our quality and service are uncompromising. We back each of our products with a two-year warranty on all
materials and workmanship. We offer technical support, user training and on-site service and maintenance
of equipment to meet the needs of our customers.
Gas Detection Service
Individually designed maintenance packages are available for specific customer needs. Service begins with
verification of the system installation that includes an initial system check and calibration. We then offer
customer training programs (on-site and at factory) to ensure that technical personnel fully understand
operation and maintenance procedures. When on-the-spot assistance is required, service representatives
are available to handle any questions or problems immediately.
WARRANTY
SENSOR ELECTRONICS CORPORATION (SEC) WARRANTS PRODUCTS MANUFACTURED BY SEC
TO BE FREE FROM DEFECTS IN WORKMANSHIP AND MATERIALS FOR A PERIOD OF TWO (2)
YEARS FROM DATE OF SHIPMENT FROM THE FACTORY. ANY PARTS RETURNED FREIGHT PRE-
PAID TO THE FACTORY AND FOUND DEFECTIVE WITHIN THE WARRANTY WOULD BE REPAIRED
OR REPLACED, AT SEC'S OPTION. SEC WILL RETURN REPAIRED OR REPLACED EQUIPMENT
PRE-PAID LOWEST COST FREIGHT. THIS WARRANTY DOES NOT APPLY TO ITEMS, WHICH BY
THEIR NATURE ARE SUBJECT TO DETERIORATION OR CONSUMPTION IN NORMAL SERVICE.
SUCH ITEMS MAY INCLUDE:
CHEMICAL SENSOR ELEMENTS
FUSES AND BATTERIES.
WARRANTY IS VOIDED BY ABUSE INCLUDING ROUGH HANDLING, MECHANICAL DAMAGE,
ALTERATION OR REPAIR. THIS WARRANTY COVERS THE FULL EXTENT OF SEC LIABILITY AND
SEC IS NOT RESPONSIBLE FOR REMOVAL, REPLACEMENT COSTS, LOCAL REPAIR COSTS,
TRANSPORTATION COSTS OR CONTINGENT EXPENSES INCURRED WITHOUT PRIOR WRITTEN
APPROVAL. SENSOR ELECTRONICS CORPORATION'S OBLIGATION UNDER THIS WARRANTY
SHALL BE LIMITED TO REPAIR OR REPLACEMENT OF ANY PRODUCT THAT HAS BEEN
RETURNED TO SENSOR ELECTRONICS CORPORATION FOR WARRANTY CONSIDERATION. THIS
WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES EXPRESSED OR
IMPLIED, AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF SENSOR
ELECTRONICS CORPORATION INCLUDING BUT NOT LIMITED TO, THE FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL SENSOR ELECTRONICS CORPORATION BE LIABLE
FOR DIRECT, INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND CONNECTED
WITH THE USE OF IT'S PRODUCTS OR FAILURE TO FUNCTION OR OPERATE PROPERLY.

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Part Number: 1460105
REV: A
Revision History
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Date
Description of Change
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Table of Contents
I. SPECIFICATIONS
II. GENERAL DESCRIPTION
III. OPERATION
Installation and Startup
Fault Codes
IV. MAGNETIC SWITCH OPERATION
V. FIGURES
Figure 1 –Overall Layout
Figure 2 –SEC 3100 Wiring
Figure 3 –SEC Sensor Separation Kit

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I. SPECIFICATIONS
Model:
SEC 3100 Transmitter
For use with:
SEC Millenium and SEC Signature series infrared sensors and SEC 3000 Toxic and Oxygen gas sensors.
Part Number: SEC 3100-XXX-XXXXXX
Output (analog):
4-20 mA (Source type), max. 1000 Ohm load at 24 VDC supply voltage
Output (digital):
RS485 LAN (isolated)
Output (relays):
Three (3) Alarm, Low, Mid High. One (1) Fault
Rated for 8 Amps 30 VDC or 250VAC
Display:
LCD (backlit)
Construction:
Epoxy coated aluminum
Operating Temperature Rating:
CUS: -40to +60C at 0 to 99% RH (non-condensing)
IECEx: -40° to +70°C
Operating Voltage:
24 VDC
Operating range: 18 to 32 VDC measured at the detector head
Max. Current Draw: (at 24 VDC with sensor)
Average: 250 mA
Peak: 500 mA
Power:
9W Max
Weight: 2.8kg
Approvals:
cCSAus Certificate: 1513912 (LR9549)
Class I, Division 1, Groups B,C,D T5
IECEx Certificate: CSA12.0012
Ex-d IIB+H2, T5 Gb
Installation Category: Cat. I, Pollution Degree 2, Overvoltage II
Altitude: Up to 2000m

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II GENERAL DESCRIPTION
CONVENTIONS
The following conventions are used in this manual.
Warning Statement
VDC (DC Voltage)
SEC 3100
The SEC 3100 transmitter is designed to be used with the SEC Millenium, SEC Signature infrared gas
sensors, SEC 3000 toxic gas detectors, or the SEC 5000 infrared gas sensors. The SEC 3100 is a
microprocessor based intelligent transmitter continuously monitoring information from the gas sensor. The
LCD of the SEC 3100 displays the gas concentration and sensor status. The SEC 3100 has one (1) “Alarm”
LED and one (1) “Status” LED. The SEC 3100 also has three (3) magnetic switches located around the
circumference of the unit. This manual will describe the operation and use of the SEC 3100 transmitter.
Features
•Explosion Proof
•Back lighted LCD Display
•Low Cost
•Plug and play toxic, oxygen and combustible gas sensors
•Self-check system
•4-20 mA ouput
•RS-485 Interface (Isolated)
•Optional alarm and fault relays
•Non-intrusive programming
•Non-intrusive calibration
•Removable, non-volatile, time stamped data logging
•Optional IS barrier
•Digital communication link to SEC 3000 and SEC Millenium Gas Detectors
•Multi port housing for easy installation
III. OPERATION
Installation and Startup
Warning: The user shall be made aware that if the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
The first step in the installation process is to establish a mounting location for the SEC 3100 transmitter and
gas sensor. Select a location that is typical of the atmosphere to be monitored or close to the anticipated
source of a dangerous gas.
It is very important that the SEC 3100 and gas sensor be properly located enabling it to provide maximum
protection. The most effective number and placement of sensors vary depending on the conditions of the
application. When determining where to locate gas sensors the following factors should be considered.

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When installing, make sure power is off when connecting the sensor, field, and relay wiring to the
appropriate terminal blocks. DO NOT turn the power back on until the 3100 is secured to the housing using
all four hex head screws.
•What are the characteristics of the gas that is to be detected? Is it lighter or heavier than air? If it is
lighter than air the sensor should be placed above the potential gas leak. Place the sensor close to the
floor for gases that are heavier than air. Note that air currents can cause a gas that is heavier than air to
rise. In addition, if the temperature of the gas is hotter than ambient air or mixed with gases that are
lighter than air, it could also rise.
•How rapidly will the gas diffuse into the ambient air? Select a location for the sensor that is close to the
anticipated source of a gas leak.
•Wind or ventilation characteristics of the immediate area must also be considered. Movement of air may
cause gas to accumulate more heavily in one area than in another. The detector should be placed in the
areas where the most concentrated accumulation of gas is anticipated. For outdoor applications with
strong wind conditions, it may require the sensors to be mounted closer together and on the downwind
side, to the anticipated area of a gas leak. Also take into consideration for indoor applications, the fact
that many ventilation systems do not operate continuously.
•The sensor should be accessible for maintenance.
•Excessive heat or vibration can cause premature failure of any electronic device and should be avoided
if possible.
•Follow all national and local installation codes and practices.
The SEC 3100 has three (3) ¾” NPT threaded connectors for mounting and wiring the sensor and
transmitter into a permanent installation.
Field wiring connections are made on the backside of the SEC 3100 printed circuit board (PCB). For wiring
details refer to Figure 2 in the back of the manual. ¾ NPT threads must pass L1 thread/plug gauge.
Mounting:
Mount the SEC3100 to rigid wall (wood based or stronger) or bulkhead structures using 1” or longer
fasteners with a minimum 3/16” diameter. Mounting to drywall (wallboard, plasterboard, etc.) or similar
material is not recommended.
Wiring:
Wire insulation for relay contacts should have a minimum breakdown voltage of twice that of the working
voltage of the signal. E.g. 110v lines should have a minimum insulation breakdown voltage of 220v, 240v
signals should have a minimum insulation breakdown voltage of 480v.
Wire insulation should be temperature rated for greater than or equal to 70°C.
There are 2 earth screws on the SEC 3100. One is on the outside of the enclosure and the other is
located on the inside of the enclosure. Both are marked with earth ground symbols and green
screws. Installation of this wire should include the use of a locking feature (i.e. locking washer).
Power wire sizing:
0 to 500 feet, recommended wire gauge size 16 AWG
501 to 1000 feet, recommended wire gauge size 14 AWG
Shielded cable is recommended. Wiring should be installed in medal conduit with no other cabling in the
same conduit. Use copper conductors only on all terminal blocks.
Colder applications may require an optional LCD heater for the SEC 3100 to make sure the LCD can be
always visible. This is a closed loop heater that will turn on when the temperature drops below

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approximately 2°C and will turn off when the temperature rises above approximately 3°C. This feature has
been approved for hazardous locations.
Conduit:
For hazardous location installations seals must be installed within 18 inches of conduit entries.
The SEC3100 has three (3) ¾” NPT threaded ports for mounting and wiring the sensor(s) and transmitter
into a permanent installation.
Field wiring connections are made on the backside of the SEC3100 printed circuit board (PCB). For
connection details refer to Figure 2.
Shielded cable is recommended. Wiring should be installed in metal conduit with no other cabling in the
same conduit.
Power Supply:
The SEC 3100 must be powered using a power supply rated for CAN/CSA C22.2 No. 61010-1-12 and
ANSI/UL 61010-1 OR a class 2 power supply as defined in Canadian Electrical Code C22.1 Section 16-200
and/or National Electrical Code article 725.121.
Real Time Clock Battery:
The SEC 3100 uses a real time clock that runs on a 3V, 1220 battery.
Warnings:
KEEP COVER TIGHT WHILE CIRCUITS ARE ALIVE
GARDER LE COUVERCLE BIEN FERME TANT QUE LES CIRCUITS SONT SOUS TENSION
Warm-up
When power is applied to the SEC 3100, it enters a one (1) minute warm-up mode. The output current will
be 0.8 mA during the warmup time period. At the end of the warm-up period with no faults present, the SEC
3100 automatically enters the normal operating mode (4.0 mA with no gas present). If a fault is present
after warm-up, the detector current output and LCD will indicate a fault. The Fault LED will also indicate the
fault.
Normal
In the normal operating mode, the 4 to 20 mA signal levels correspond to the detected gas concentration.
The transmitter continuously checks for and displays system faults or initiation of calibration and
automatically changes to the appropriate mode.
The 4 to 20 mA output of the SEC 3100 sensor is a non-isolated current source.
Current Output and Corresponding Status
Current Output Status
0-20 mA Normal measuring mode
0.0 mA Unit Fault
0.2 mA Reference channel fault
0.4 mA Analytical channel fault
0.8 mA Unit warm up
1.0 mA Optics fault
1.2 mA Zero drift fault
1.6 mA Calibration fault
2.0 mA Unit spanning
2.2 mA Unit zeroing
4.0 mA Zero gas level (0% of full scale)
5.6 mA (10% of full scale)
8.0 mA (25% of full scale)
12 mA (50% of full scale)

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Once the fault is cleared the SEC 3100 will atomatically resume normal operation.
Flash
Rate
Output Current
Unit Status
Label
Possible Problem
1
4-20ma
Unit Running
Unit is measuring gas and adjusting 4-20ma output accordingly.
2
2.2ma
Unit Zero Calibrating
Unit going through its zero calibration procedure.
3
2.0ma
Unit Spanning
Unit going through its spanning procedure.
5
0.8ma
Unit Warm-up
Only for one minute after unit power-up
6
0.0ma
Power-up Fault
Hard Fault (refer to gas sensor manual)
7
1.6ma
Calibration Fault
1. Attempt Unit Span with no gas
2. Attempt Unit Zero with gas
8
NA
NA
Currently Not Used
9
0.0ma
Unit Fault
Hard Fault (refer to gas sensor manual)
10
1.0ma
Optics Fault
Clean sensor’s windows
11
1.2ma
Zero Drift Fault
Hard Fault (refer to gas sensor manual)
12
0.0ma
Configuration Fault
Hard Fault (refer to gas sensor manual)
16
0.2ma
Reference Channel Fault
Hard Fault (refer to gas sensor manual)
17
0.4ma
Active Channel Fault
Hard Fault or Unit Zero with gas
IV. MAGNETIC SWITCH OPERATION
The SEC 3100 has three (3) magnetic switch pickups on the Display PCB. The picture below shows the
location 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.

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Switch Operation
ENTER Enter Menu Mode, Selects a menu to Enter
UP Moves up through Menu selections
DOWN Moves down through Menu selections
For further details on gas sensor calibration refer to the appropriate SEC sensor instruction manual.
The LCD contrast potentiometer, (POT1) is located under the protective faceplate shown above on the front
side (LCD side) of PCB to the left of the LCD.
Gas Sensor Port (1
x
¾”
)
SEC 3000
SEC Millenium
Magnetic Switch (3)
UP Arrow, DOWN
Arrow, ENTER
Field Wiring Port (2
x
¾”
)
➢
Power
➢
4-20 mA
➢
RS485 (MODBUS)
➢
Alarm Relays
Fault LED
Green
OK
Red Fault
LCD Display:
Real Time Status
Gas Type
Gas Concentration
Fault Identification
Range
ID Number
Memory Card Status
Interactive Menus
Calibration
Relay Programming
ID & Zone Number
Mounting holes (2)
Memory Data Card
Slot
Alarm LED
Green OK
Yellow Low Alarm
Orange
Mid Alarm
Red High Alarm

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V. MENU OPERATION
Inital Power Up Sequence of the SEC 3100
In normal operating mode. Actual gas concentration will be displayed to the left of ID #, Range, Gas
Type, MC (Memory Card) status.
During Warm Up, FAULT LED will be solid Blue and ALARM LED will be falshing Yellow –Blue.
MC –REMOVED indicates the MEMORY CARD (MC) in not installed in the SEC 3100. Other MC
indications are OK, FAULT, FULL.
ID: xx
WARM 0-20.0PPM
UP WF6
ENT TO ABORT
ID: 1
0-20.0 PPM
WF6
MC - REMOVED
SYSTEM BOOT PROCESS
--- WAIT FOR SYNC –-
SYSTEM BOOT PROCESS
-WAIT FOR SENSOR -
INITIALIZING
ID: xx
WARM SN: xxxxx
UP TYP: x.x
VER: x.x
0

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Selecting Enter when the SEC 3100 in in normal operating mode will advance to the following display:
Selecting Enter will allow the operator to safely remove the Memory Card.
Arrow Down
Selecting Enter at UNIT INFO displays the following:
SN is the SEC 3100 serial number. VER is the SEC 3100 software version number. Selecting Enter again
will return the display to the main info menu.
Sensor Status Menu
TYP: Sensor type (0.0 is a SEC 3000, 32.0 is SEC
Millenium)
SN: Sensor serial number.
VER: Version of sensor software.
CAL: Calibration date of sensor.
Selecting MAIN MENU is covered in the next pages of the manual.
Select Exit to go back to
* EJECT MEMORY CARD
INFO
MAIN MENU
EXIT
EJECT MEMORY CARD
* INFO
MAIN MENU
EXIT
3100 UNIT INFO:
SN- XXXXXXXXXXXXXXX
VER- X X.XXX.XXX
EJECT MEMORY CARD
INFO
MAIN MENU
* EXIT

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Main Menu and Sub Menus
Enter Calibration Menu
Used to calibrate
the gas sensor.
Down Arrow
Alarm Menu
Used to set
alarm level set
points and
parameters.
Down Arrow
Relay Menu
For setting
alarm relay
On & Off delay &
Energized states.
Down Arrow
Network Menu
Used to set
Zone #, ID # and
Select Online
Down Arrow
Hide Menu
Hide is used to
blank the
display up to
low alarm setting
Down Arrow
Self Test Menu
Generates a
signal on the
display, RS485
& 4-20 mA
Down Menu Date Time Menu
Sets the date
and time in the
real time clock.
Down Arrow
4 –20 MA CAL
Allows user to increase
or decrease 4.0 mA
current output, or adjust
20 mA current output
Down Arrow
Exit back to normal
operation.
EJECT MEMORY CARD
INFO
* MAIN MENU
* CALIBRATION
ALARM
RELAY
CALIBRATION
* ALARM
RELAY
CALIBRATION
ALARM
* RELAY
* NETWORK
HIDE NO
NETWORK
* HIDE NO
* SELF TEST
DATE TIME
SELF TEST
* DATE TIME
4 –20 MA CAL
* EXIT
* 4 –20 MA CAL
EXIT

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Calibration Menu
Enter
Using the Up and Down arrows allows the operator to move the cursor (*) to select a function.
To Zero the sensor apply clean air (N2 for an oxygen sensor) and select enter. The following will be
displayed.
Then the following will be displayed.
Once complete the following will be displayed. The sensor has been successfully zeroed.
Arrow down to CAL. VAL to verify the span gas calibration value matches the value of the span gas
calibration on hand. If not, select Enter and the following screen will appear.
Using the Up and Down arrows will allow the operator to change the calibration gas value of the sensor to
match the calibration gas used to span the sensor. Once the correct value is displayed select Enter and the
sensor will be uploaded with the new calibration gas value.
* CALIBRATION
ALARM
RELAY
ZERO
SPAN
* CAL. VAL 5 *
EXIT
* ZERO 0
SPAN
CAL. VAL
EXIT
CALIBRATION PROCESS
------- WAIT ----------
CALIBRATION PROCESS
------- DONE ----------
* ZERO 0
SPAN
CAL. VAL
EXIT

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To Span the sensor with calibration gas use the Up and Down arrows to select the following display.
Apply span gas to the sensor for the appropriate amount of time in order for the sensor to stabilize. The gas
reading is displayed to the right of ZERO. Once stable select Enter. This will go the display:
If calibration span gas is still present the display will read:
Apply clean air to the sensor to reduce this reading.
The display will advance to the following:
This completes the calibration and the device can be put back into the normal operating mode.
Arrow Down to
Enter
Enter again and the SEC 3100 returns to normal operation.
ZERO 3
* SPAN
CAL. VAL
EXIT
CALIBRATION PROCESS
------- DONE ----------
GAS LEVEL : 5
CALIB. GAS PRESENT
---- WAIT ----
* ZERO 0
SPAN
CAL. VAL
EXIT
ZERO
SPAN
CAL. VAL
* EXIT
* EXIT

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Alarm Menu
Enter
Select the Alarm Relay (LOW, MID, HI, FAULT) using the down arrow. Once the cursor is on the alarm
relay you wish to configure, hold the magnet over Enter. The example LOW will be used. The same
operations can be used to set the MID, HI or FAULT relays.
Selecting Enter will display the following screen allowing the alarm set point to be
programmed. Using the Up and Down arrows will change the set point. Once the correct set point is
displayed select Enter and the new value will be accepted.
Arrow Down
Selecting Enter will allow the operator to change the operation of the relay operation from Non-Latching
(NORMAL) to Latching (LATCHING) or to Audible (AUDIBLE).
If the relays are set to Latching or Audible, the magnet can be used to reset (unlatch or silence) the relays
by selecting any magnetic pickup switch UP arrow, DOWN arrow or ENTER.
CALIBRATION
* ALARM
RELAY
* LOW
MID
HI
* ALARM LOW 4
LATCH
ACTIVE
EXIT
* ALARM LOW 2 *
LATCH
ACTIVE
EXIT
CONFIGURING PROCESS
------ WAIT -------
* ALARM LOW 2
LATCH
ACTIVE
EXIT
ALARM LOW
* LATCH NORMAL
ACTIVE
EXIT
* FAULT
EXIT

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Arrow Down
Selecting Enter will allow the operator to change the operation of the relay operation from Active HI to Active
LOW. HI activates the relay on a rising alarm level. LOW actives the relay when the alarm threshold falls
below the alarm set point. Once the correct operation is selected, use the Down arrow to advance to the
next menu item.
Arrow Down
Selecting Exit will advance to the next menu.
This menu will allow the operator to select another relay to program. Or select Fault or Exit and the next
display will be:
Selecting Enter on this display will put the SEC 3100 back into normal operation.
ALARM LOW
LATCH
* ACTIVE HI
EXIT
* LOW
MID
HI
ALARM LOW
LATCH
ACTIVE
* EXIT
FAULT
* EXIT

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Relay Menu
Selecting Enter will advance to the following menu.
Arrow down to the next screen will be
Select the Alarm Relay (LOW, MID, HI, FAULT) that is to be configured using the down arrow. Once the
cursor is on the correct alarm relay, hold the magnet over Enter. The example LOW will be used. The
same operations can be used to set the MID, HI, or FAULT relays.
Select Enter
Select Enter
Using the Up and Down arrows the operator can change the ON delay time for the relay to actuate after the
alarm threshold has been exceeded. The time is measured in seconds (0-255). Once the correct time is
displayed select Enter to accept the new value. Then Exit the menu and proceed on to the next selection.
In this example the Low alarm relay will actuate 30 seconds after the Low set point is exceeded.
CALIBRATION
ALARM
* RELAY
* LOW
MID
HI
* FAULT
EXIT
* LOW
MID
HI
* ON DLY LOW 0
OFF DLY
ENERGIZED
EXIT
* ON DLY LOW 0 *
OFF DLY
ENERGIZED
EXIT
* ON DLY LOW 30
OFF DLY
ENERGIZED
EXIT

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Select Enter
Select Enter
Using the Up and Down arrows the operator can change the OFF delay time for the relay to turn OFF after
the reading has decreased below the alarm point threshold. The time is measured in seconds (0-255).
Once the correct time is displayed select Enter to accept the new value. Then Exit the menu and proceed
on to the next selection.
In this example the Low alarm relay will stay energized for 60 seconds after the alarm has cleared.
Arrow Down
Selecting Enter will allow the operator to change the operation of the relay coil from normally de-energized
(ENERGIZED NO) to normally energized (ENERGIZED YES). Once the correct operation is selected, use
the Down arrow to advance to the EXIT menu. Select Enter to go back to the Relay Menu
This menu will allow the operator to select another relay to program. Or select Exit and the next display will
be:
Arrow Down to Exit
Enter
Selecting Enter will return the SEC 3100 into normal operation.
ON DLY LOW
* OFF DLY 0
ENERGIZED
EXIT
ON DLY LOW
* OFF DLY 0 *
EXIT
ON DLY LOW
* OFF DLY 60
ENERGIZED
EXIT
ON DLY LOW
OFF DLY
* ENERGIZED NO
EXIT
* LOW
MID
HI
* FAULT
EXIT
* EXIT
FAULT
* EXIT

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Network Menu
Select Enter
Select Enter to change the Zone number of the SEC 3100.
Use the Up and Down Arrows change the Zone number (0-255). Once the correct Zone number is
displayed select Enter.
Arrow Down to ID. To change the ID number select Enter. Use the Up and Down Arrows to change the ID
number (0-255). Once the correct ID number is displayed select Enter.
Arrow Down to Online.
Using Enter the operator can toggle between Online YES and Online NO. Online YES turns on the MODUS
RS485 communication. Online NO turns the MODBUS RS485 communication off.
Arrow Down to Exit
Enter
* NETWORK
HIDE
* ZONE 0
ID
ONLINE
EXIT
* ZONE 0 *
ID
ONLINE
EXIT
ZONE
* ID 1 *
ONLINE
EXIT
ZONE
ID
* ONLINE YES
EXIT
ZONE
ID
ONLINE
* EXIT
* EXIT

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Hide Menu
Using Enter the operator can toggle between Hide YES and Hide NO.
The Hide function allows the operator to not display the gas reading until the Low Alarm threshold is
exceeded. All outputs will function as normal when the Hide mode selected to YES.
Self Test Menu
Selecting Enter for the Self Test will make the sensor generate a 4-20 mA input into the SEC 3100 from 4
mA to 20 mA (0-fullscale). In the self test mode the SEC 3100 outputs are fully functional. The SEC 3100
will display the rising gas level, the 4-20 mA output will increase to 20 mA, the relays will actuate and the
RS485 information will be transmitted to the control system. The following screen will be displayed
Once the unit reaches full scale the SEC 3100 automatically returns to normal.
NETWORK
* HIDE NO
* SELF TEST
DATE TIME
ID: 1
0-20.0 PPM
WF6
MC - REMOVED
10.4