HART Communications
109
Instruction Manual
Section 10: haRT Communication
LIQ-MAN-1066
April 2017
1066 Temperature parameters
1066 ph/ORp
Type
Enumeration / Range
Read/Write
Default
rtd_offset
The temperature offset resulting from a temperature calibration.
FLOAT
R / W
0
rtd_slope
The slope (dimensionless) resulting from a two point temperature
calibration. (Valid for cell constants < 0.02 1/cm)
FLOAT
R / W
1
temp_comp_mode
Selects automatic or manual temperature compensation.
ENUM Manual
Automatic
R / W
Automatic
manual_temperature
If manual temperature compensation is chosen, provides a con-
stant temperature value used by the transmitter.
FLOAT
R / W
25.0 °C
Type Enumeration /
Range
Read/Write
Default
zero_offset
The zero offset of a pH sensor resulting from a calibration.
FLOAT
R / W
0.0 mV
ph_slope
The slope of a pH sensor resulting from a buffer calibration.
FLOAT 40 -- 62 mV/pH R / W
59.16 mV/pH
zero_offset_limit
The maximum value of the zero offset allowed for a successful
calibration.
FLOAT
R / W
60
min_ph_slope
The minimum value of the slope allowed for a successful calibration.
FLOAT 40 -- 62 mV/pH R / W
40 mV/pH
max_ph_slope
The maximum value of the slope allowed for a successful calibration.
FLOAT 40 -- 62 mV/pH R / W
62 mV/pH
ph_stabilization_time
The period of time used to determine stability of a pH sensor during
automatic calibration.
FLOAT 0 -- 99 seconds R / W
10 seconds
ph_stabilization_value
The pH change used to determine stability of a pH sensor during
automatic calibration.
FLOAT 0.01 -- 1.0 pH
R / W
0.02 pH
ph_buffer_standard
The types of pH buffers available for automatic calibration.
ENUM Standard / Nist
DIN 19267
Ingold
Merck
Fisher
R / W
Standard / Nist
preamp_location
The location of the preamplifier in a pH measurement.
ENUM analyzer
sensor / J-box
R / W
reference_impedance_level
Configures the transmitter to use reference electrodes with
impedances less than 500 kohm (low) or greater than 500 kohm
(high).
ENUM Low
High
R / W
Low
ph_solution_temperature_correction
Configures the transmitter to correct the pH measurement for changes
in the pH of the solution with temperature.
ENUM Off
ultra pure water
high pH
ammonia
custom
Off
ph_solution_temperature_coefficient
The coefficient used to correct solution pH when using custom
solution pH temperature correction.
FLOAT -9.999 -- 9.999
pH / °C
R / W
0.000 pH / °C
