ATI
Model Q45CT Portable Transmitter
Part 4
– Configuration
20
O&M Manual
Rev-G (7/15)
4.8 Calibration Menu [CAL]
The calibration menu contains items for frequent calibration of user parameters.
There are three items in this list: Cal Cond, Cal Temp, and Cal TC Factor.
Cal Cond
The conductivity calibration function allows the user to adjust
the transmitter offset and span reading to match reference
buffers, or to adjust the sensor offset to match the sample
reading. See Part 5 - Calibration for more details.
Cal Temp
The temperature calibration function allows the user to
adjust the offset of the temperature response by a small
factor of ±5 °C. The temperature input is factory calibrated
to very high accuracy. However, long cable lengths and
junction boxes may degrade the accuracy of the temperature
measurement in some extreme situations. Therefore, this
feature is provided as an adjustment. See Part 5 -
Calibration for more details.
Set Range
This function allows the user to set the display range of the
transmitter for a specific application. Once set, all output
functions use this display range to establish configuration
settings. Press ENTER to initiate user entry mode, and the
value will flash. Use the arrow key to modify the range for
the desired range and then press ENTER.
Cal Zeros
This function calibrates all range zero-points to the specific
sensor being used. This function is only required to be
performed once at initial start-up or when the sensor has
been replaced. See Part 5 - Calibration for more details.
