SMAR LD303, Operation And Maintenance Instruction Manual, Page: 51 / 110

Configuration
3.25
Figure 3.26 – Transducer Configuration Screen
The following engineering unit's codes are defined for pressure according to Profibus PA standard:
UNIT CODES
inH
2
O a 68
q
F 1148
inHg a 0
q
C 1156
ftH
2
O a 68
q
F
1154
mmH
2
O a 68
q
F 1151
mmHg a 0
q
C 1158
psi 1141
bar 1137
mbar 1138
g/cm
2
1144
k/cm
2
1145
Pa 1130
kPa 1133
torr 1139
atm 1140
Mpa 1132
inH
2
O a 4
q
C
1147
mmH
2
O a 4
q
C
1150
Table 3.3 – Engineering Unit’s Code
SENSOR_UNIT allows the user to select different units for calibration purposes than the units
defined by SENSOR_RANGE. The SENSOR_HI_LIM and SENSOR_LO_LIM parameters define the
maximum and minimum values the sensor is capable of indicating, the engineering units used, and
the decimal point.
Let’s take the lower value as an example:
Apply to the input zero or the pressure lower value in an engineering unit, this being the same used
in parameter SENSOR_UNIT, and wait until the readout of pressure stabilizes.
Write zero or the lower value in parameter CAL_POINT_LO. For each value written a calibration is
performed at the desired point.
The parameter
SENSOR_UNIT
should be configured
according to the
Engineering Unit
wished for calibrating
the device.
After the selection,
this key should be
pressed to complete
the operation
The Engineering Units
can be choosen from the
Sensor Units list box.