MULTICAL® 302
Kamstrup A/S · Technical Description · 5512-1334_F1_GB_12.2016
59
10.1
Sensor types
MULTICAL
302 comes with a ø5.2 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 temperature sensors is not to be mounted in the flow sensor, it has to be
mounted within a distance of max. 12 cm from the outlet of the flow sensor instead.
The enclosed plastic coupling can be removed, thus allowing the sensor to be used in a sensor pocket. Please note
that not all types of couplings can be removed.
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.
Note
: In Germany ”EichOrdnung” EO-1988 stipulates that in new installations it is only permissible to use direct
temperature sensors for heat meters with pipe diameter DN 25 or less. Replacing heat meters in existing installations it
can in some cases be permitted to use pocket sensors in small heat meters; sensor type versus pocket type must,
however, appear from ”Bestandsliste der verwendeten kurzen Tauchhülsen”.
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.
Example:
If the display shows that the flow sensor is to be
mounted in the outlet pipe, the sensor with the green
plastic ring must be mounted in the inlet pipe. See the
table in paragraph 6.5 for further information.
Figure 6
