KROHNE OPTISENS COND 1200 EN - Manual (Page 30)

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OPERATION
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OPTISENS COND 1200
www.krohne.com 01/2014 - 4001967301 - MA OPTISENS COND 1200 R01 en
• Enter the measured temperature. Press ^ to confirm the entered value. The manually
measured temperature will now be used for temperature compensation.
4.3.2 Calibrating measurement
Calibration is necessary in regular intervals or when installing a new sensor.
When calibrating a conductivity measurement, keep in mind that the measuring system as a
whole is calibrated, and not only the sensor. Therefore the measuring system has to be
recalibrated if, for example, the measuring medium changes.
In an intact sensor, the optimal slope is 59 mV and the optimal zero point is 0 mV. The slope
should at least have a value between 50...65 mV.
Re-calibrate the sensor if the slope does not approximate those limits.
As the sensor ages, the slope gets flatter and the zero error increases. When one or both of
these values exceed certain limits, the signal converter displays a message indicating that the
sensor has to be exchanged.
To avoid alarms on the distrubted control system (DLC) when temporarily removing the sensor
(i.e. for maintenance), the signal converter has a hold function. This function "freezes" all
outputs (i.e. the display and the current outputs) of the last measured value.
Step 2b: probe manual probe manual probe manual probe manual
Measure the temperature of the measuring medium.
• Press >>>> for more than 2.5 seconds, then release the button. You are on the main menu level. In the
upper line of the display "A" appears, beneath the main menu setup
setup setup setup is highlighted.
• Press or until the main menu setup setup setup setup is highlighted.
MAIN MENU
A quick setup
B test
> C setup > C setup > C setup > C setup
D service
• Press >>>> to enter the chosen menu.
You are on the first submenu level. In the upper line of the display "setup" and "c1" appears,
beneath the submenu process input A process input A process input A process input A is highlighted.
• Press or to select process input A process input A process input A process input A.
• Press >>>> to enter the chosen menu process input A process input A process input A process input A.
You are on the second submenu level. Press or until the submenu temperature temperature temperature temperature is
highlighted.
• Press >>>> to enter the chosen menu. The submenu probe probe probe probe is highlighted.
• Press or until the submenu manual manual manual manual is highlighted.
• Press ^ to enter the chosen menu
INFORMATION!
As an indication that the hold function is active, the "warning sign" in the upper left corner of the
display appears. Meanwhile the status messages show "checks in progress". For more details
about how to select the manual hold function refer to the signal converter documentation.
.book Page 30 Friday, January 24, 2014 12:32 PM