KROHNE OPTISENS PH 9500 - Manual (Page 19)

INSTALLATION
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OPTISENS PH 9500
www.krohne.com 08/2012 - 4001929601 MA OPTISENS PH 9500 R01 en
3.7.3 Mounting to SENSOFIT IMM 1000 immersion holder
3.8 Installing an external temperature sensor
Since the slope of the pH sensor is temperature-dependent, a temperature compensation makes
sense if the temperature of your measuring medium varies.
If the pH sensor does not have an integrated Pt100/1000 temperature sensor, you should use an
external temperature sensor. There are various different possibilities of adding an external
temperature sensor to your pH measurement installation. They can not be explain in detail in
this document. Nevertheless, you should follow the general guidelines.
General guidelines for external temperature sensor installation
• The temperature sensor should be calibrated using a reference thermometer. For further
information refer to Temperature compensation on page 27.
• The temperature should be measured close to the pH sensor in the same medium to avoid
temperature differences. For example, surface water may have a different temperature than
deeper water.
Suitable external temperature sensors are
• Pt100 in 2-wire or 3-wire connection
• Pt1000 in 2-wire or 3-wire connection
INFORMATION!
The immersion assembly is an optional accessory and not part of the standard scope of delivery.
CAUTION!
• Never touch or scratch the pH sensitive glass tip of the sensor.
• Make sure that the glass tip is clean and dust-free. If necessary, clean the tip as described on
page 37
INFORMATION!
Please see technical datasheet SENSOFIT IMM 1000