Operator Manual
Page
11
of
40
P/N 1580281
SEC3120 Digital Transmitter
Sensor Electronics Corporation
Rev 10, 20150707
‘INIT MEMORY CARD ….’ – Memory card system
Initializing.
‘SUCCESS’ or ‘FAILURE’ will show after a few seconds.
‘S1’ or ‘S2’ alternates and identifies that the displayed
data is for either Sensor 1 or Sensor 2.
‘ID: XXX’ refers to the user assigned ID for Sensor 1.
‘ID: YYY’ refers to the user assigned ID for Sensor 2.
‘SENSOR WARMUP’ – indicates that the given sensor
(S1 or S2) is warming up.
‘SENSOR UPLOAD’ – Sensor is uploading its
parameters to The 3120.
7.
Normal Operation
In the normal operating mode, the 4-20 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 4-20 mA output ports of the SEC3120 are non-isolated current source(s), passed through from the
attached sensor(s). Their output values are defined by the associated sensor manual(s) (4
– 20 mA normal
gas levels, less than (<) 4 mA indicates a status condition such as warm-up, calibration or a sensor fault).
Normal Operation Screen
In normal operating mode actual gas concentration will be displayed on the left of the screen. The
right side of the screen will display the ID #, Range, Gas Type and Status. The bottom line will
scroll through the MC (memory card) status, Date, Time and, if a sensor has a warning code, will
display ‘WARN: xxx’ where ‘xxx’ is a cell code #.
Example:
The normal display screen will toggle between sensor one and sensor two information at a rate of
approximately once every two to three seconds. The alarm and fault LEDs indicate the alarm/fault status
for the current sensor displayed at any given time as well. The operator may choose to advance the
information displayed to the next sensor
’s information by selecting either the UP or DN switches. Doing so
will immediately toggle the normal display screen information for the sensor not currently displayed (i.e. If
display is currently showing sensor one (S1) information, then sensor two (S2) information will be
immediately displayed, whereas if the display is currently showing sensor two (S2) information, then
S1
ID:010
0-100 %LEL
METHANE
23:15:33
S1
ID: XXX / YYY
SENSOR 0-WAITING
INIT
WAITING
S2
S1 SENSOR ID: XXX / YYY
WARMUP 0-WAITING
-ENT- TO WAITING
S2 ABORT
SEC3120 TRANSMITTER
INIT MEMORY CARD …
Success
S1
ID: XXX / YYY
SENSOR 0-WAITING
UPLOAD WAITING
S2
S1 ID: XXX
(S1 GAS RANGE)
(S1 GAS TYPE)
(STATUS)
0
ID: YYY
(S2 GAS RANGE)
(S2 GAS TYPE)
S2
(STATUS)
0
S1
ID:010
0-100 %LEL
METHANE
MC - FAULT
ID: 011
0-200 PPM
AMMONIA
S2
08/15/2010
0
0
ID: 011
0-200 PPM
AMMONIA
S2
WARN: 131
0
0
