Series A12
Unisens
2-Wire Transmitter
O & M Manual
- 14 -
Rev-L, 7/15
OPERATION
After mechanical and electrical installation is complete, the transmitter is ready for operation.
Prior to start-up, recheck the loop wiring connection to be sure it's correct. Reversing the loop wiring will
not damage the transmitter, but other devices in the loop may be adversely affected.
START-UP
When power is first applied, the transmitter will go through a start-up sequence. The LCD display
will indicate the following information.
Load
Indicates that sensor module data is loading into the transmitter
tr 1.0
Indicates transmitter program version number
Sr 1.0
Indicates sensing module revision level
XX
Two digit gas code number (see table 1)
XXXX
PPM
Number indicating the full scale range of the sensing module
Ur E / Ur d
Ur E – Indicates that the signal trouble on under range function is enabled
Ur d – Indicates that the signal trouble on under range function is disabled
InSt/nonE
InSt - Indicates that Auto-Test function is installed in sensor module
nonE - Indicates that sensor module does not contain an Auto-Test
generator
Enab/disA
Enab - Indicates that the Auto-Test function is enabled.
disA - Indicates that the Auto-Test function is disabled.
XX.XH
Number of hours until the next scheduled Auto-Test (in hours)
XXXX
Number of successful sensor tests using the Auto-Test generator
XXXX
Number of unsuccessful sensor tests using the Auto-Test generator
All Segments
Display test which powers up all display segments and flags
