Oldham iTrans 2, Installation And Operation Manual, Page: 77 / 106

77
Calibration and Zeroing Modes
The enters the calibration or
zeroing mode when the user selects
the corresponding operation on
sensor 1 through intrusive/non-
intrusive programming screen or
through HART 4-20mA interface.
During
both of zeroing and
calibration modes the HART channel
current remains fixed at 3mA (16mA
for oxygen sensor). A successful
zeroing or calibration operation is
followed by a warm-up mode and an
unsuccessful operation is followed
by a corresponding fault mode.
Figure A - 11 Calibration Display
HART interface is enabled throughout the zeroing and calibration modes.
Fault Mode
The enters the fault mode
whenever it is not able to provide
the gas reading to the user interface.
There are different types of sensor
faults which have been listed in the
Table A - 2. The fault detection is
enabled throughout the
operation after the device is
powered on, and the fault codes are
indicated on the
display
after the initial start-up mode.
During the fault mode on sensor 1
the HART 4-20mA channel current
remains fixed at 1mA and HART
interface is enabled throughout fault
mode.
Figure A - 12 Fault Mode Display