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Kamstrup A/S • 55121351_D2_GB_04.2015
MULTICAL® 302
2 Temperature sensors
The temperature sensors used to measure inlet and outlet temperatures, respectively, are a
matched sensor set that must never be separated.
Temperature sensors are mounted in MULTICAL® 302 from the factory. According to EN 1434, the
cable length must not be changed.
The temperature sensor which is mounted in the flow sensor from the factory has no marking on
the sensor cable. The other sensor, which is marked with a green plastic ring, must be mounted in
the "opposite" pipe compared to the flow sensor.
2.1 Mounting of temperature sensors
MULTICAL® 302 comes with a Ø 5.2 mm Pt500 sensor pair (matched sensors) with 1.5 m silicone
cable. This sensor type can be used as direct sensor using a coupling and an O-ring and as pocket
sensor to be mounted in a sensor pocket.
One temperature sensor is mounted in the flow sensor from the factory. The other sensor ought to
be mounted as direct sensor. Alternatively, both sensors must be mounted in sensor pockets as
symmetrical sensor installation gives the best measuring result. If one of the sensors is not to be
mounted in the flow sensor, it must instead be mounted as close to the outlet of the flow meter as
possible so that the distance between the flow sensor and the temperature sensor is max. 12 cm.
Asymmetrical sensor installation (one direct sensor and one pocket sensor) is only advisable
where national regulations allow this, and never in systems with low differential temperature and/
or low water flow.
Example:
If the display shows that the flow sensor is to
be mounted in the inlet pipe, the sensor with
the green plastic ring must be mounted in the
outlet pipe.
2.2 Coupling for direct sensor
Slide the enclosed plastic coupling into place
from the end of the sensor tube until you feel
a click when the coupling has reached the first
knurling.