KROHNE ACM 500 EN - Manual (Page 13)

02/2013 ACM 500 13
4.1.4 Overranging of the ADC for temperature
Independent of the measuring range setting for temperature, this is always measured in the –
20...150°C range. Outside these limits the device will go into error condition. Since conductivity
can no longer be compensated, the current output for conductivity will also indicate the error
condition with 2.4 mA. The current value for temperature will, depending on whether under- or
overranging has occurred, go to 2.4 mA and 21.6 mA, resp.
If this error occurs within the permissible temperature range, this would suggest that the
temperature sensor is defective.
^^^^.^ mS
1
^^^.^ °C
Measured conductivity
Measured temperature
00
Temperature > 150°C
^^^^.^ mS
1 vv
.
v
°C
Measured conductivity
Measured temperature
00
Temperature < -20°C
5 Safety information
Before putting the device into operation, please read through this product description. Make sure
that the product is unconditionally suitable for the application in question.
Disregard of application directions or technical details can lead to personal injury and/or damage
to property.
In all applications, make sure the materials of construction (see Technical Data) are compatible
with the media to be measured.
For start-up and operation, please pay regard to the following information. In addition, consult
national installation regulations and the safety and accident prevention regulations applicable to
the respective application.