Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 140)

<11. CALIBRATION OF ISC (Inductive Conductivity)>
11-5
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
11.6 Temperature calibration
In order to make the most accurate measurements, it is important to have a precise temperature
measurement. This affects the display of temperature, and the output signal (when used). More
important, however, is the temperature compensation, and calibration accuracy. The temperature
of the sensor system should be measured independently with a high precision thermometer.
The value of “Measured temperature” should then be adjusted to agree with the reading (zero
offset calibration only). For best accuracy, this should be done as near to the normal operating
temperature as possible.
11.7 HOLD
The FLXA21 has a function to hold the mA output at a preset value (default: “Last”).
Use this menu to hold the output.
For the settings, see “n Configure Hold” on page 10-7.
During commissioning or quick setup, the output is automatically held.
Setting “Hold during Calibration” to “Disabled” deactivates the hold function during calibration.
Press to select Execute: HOLD and then choose Manual Hold ON or Manual Hold OFF.
This allows you to set up manual hold.
10.00
Tag:FLXA21–ISC
25.0
4mA 20mA Conduct1-TC1
°C
mS/cm
HOLD
Figure 11.10 Example of the display with the manual hold enabled
To cancel manual hold, press the lit HOLD section on the Main display.
ISC
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