Operator Manual
Page
10
of
40
P/N 1580281
SEC3120 Digital Transmitter
Sensor Electronics Corporation
Rev 10, 20150707
6.
Initial Startup
When power is applied to the SEC3120, it enters its power up sequence (approximately sixty seconds),
followed by the sensor warm-up mode which can take between one and five minutes depending on the
sensor(s). At the end of the warm-up period with no faults present, the SEC3120 automatically enters the
normal operating mode.
If a fault is present after warm-up, the LCD and the Fault LED will indicate the fault. See your specific
sensor’s manual for warm-up and fault current value meanings (less than 4 mA).
NOTE:
If your SEC3120 unit is set to
operate two sensors in the ‘Identical’ Role and they are not identical
in gas type, range or units, then the SEC3120 unit will display a fault and indicate that the
Sensors Are Not
Identical
, and the fault relay on the SEC3120 unit will be engaged.
Inital Power Up Screen Sequence of the SEC3120
‘BRWN’ – Brown Out Reset (or ‘SOFT RESET’ shown
on bottom line for a software reset)
‘005’ – Counts down to ‘000’ second startup delay
‘VER’ refers to the Firmware version installed in the
display.
‘INIT ROM FROM RAM’ – permanent parameters
transferred from either ‘ROM’ to NVRAM or from
N
VRAM to ROM, or ‘ROM’ and ‘RAM’ are ‘IDENTICAL’.
‘BOOT SENSOR SYSTEM’ – Starting up sensor
controllers
Gas Sensor Port (1
x
¾NPT
)
SEC 3000 / 3300
SEC Millenium / Signature / 5000
Magnetic Switch (3)
Field Wiring Port (2
x
¾NPT
)
Power
2x 4-20 mA
RS485 (MODBUS) A & B
Alarm and Fault 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
SEC3120 TRANSMITTER
-STARTING UP FROM
BRWN
(SOFT RESET)
005
SEC3120 TRANSMITTER
VER X.YY.RRRR
005
08/10/2010
21:15:33
SEC3120 TRANSMITTER
VER X.YY.RRRR
003
-INIT ROM FROM RAM
SEC3120 TRANSMITTER
VER X.YY.RRRR
-BOOT SENSOR SYSTEM
