Endura APA592
pH / Redox (ORP) transmitter
7 Operator Pages and Menus
OI/APA592–EN Rev. E
57
Temperature Cal
The temperature calibration is used to calibrate the temperature input from
the sensor against a standard known reading – see Table 7.5, page 62.
A two-point temperature calibration is performed using this routine by
calibrating, in succession, at a low temperature value and a high temperature
value (the two values separated by at least 20 °C [68 °F]).
This results in both temperature slope and offset computation.
Note
–
ORP
. The temperature effect on ORP sensors is negligible. The effect
of temperature on pION sensors is difficult to characterize, except for specific
applications. Therefore, only the solution coefficient option can be used to
compensate for electrode and process changes with temperature.
All
Edit PV, Temp Cal
Enables manual adjustment of the sensor PV slope and offset and sensor
temperature slope and offset.
Note
. This function may not be suitable for many applications, but it provides
quick, easy access to these calibration values for troubleshooting.
All
PV Slope
Edits the
PV Slope
value as a percentage.
PV Offset
Edits the
PV Offset
value.
Temp Slope
Edits the
Temp Slope
value as a percentage.
Temp Offset
Edits the
Temp Slope
value.
Reset PV, Temp Cal
Resets all process sensor and temperature sensor calibration data to default
factory settings.
All
Analog Output Trim
Adjusts the maximum / minimum output signals (4 to 20 mA, ±0.5 mA) to
maintain precise transmission of the process variable to the final monitoring
system.
The transmitter's output current is factory calibrated, however, the output can
be trimmed if required.
Note
. Enabled when
HART Poll Addr
=
0
– see page
.
Not applicable to HART multidrop mode where current output is not used.
All
Calibrate Parameters
Parameter
Description
Tx
Type
