Sensor correction means:
A correction is applied to the value measured by the sensor. This is then cumulatively
effective over the whole measurement range.
An adjustment to the sensor correction is then necessary only:
in conjunction with first installation,
if the sensor cable length is altered,
when replacing a faulty sensor.
In order to adjust the sensor correction, a reference thermometer is needed.
Proceed as follows:
Switch off power supply
Install / change sensor
Use the reference thermometer to establish the milk temperature.
Switch on control unit and set [c90] to the measured number of degrees.
The control unit calculates the difference between the reference thermometer
reading and temperature sensor 1 and automatically sets this in parameter
[c91].
Parameter [c91] can be displayed and adjusted at any time.
Hold down the up and down arrow buttons simultaneously:
stored.
The settings are
Proceed with the setting for sensor 2 (if present) in the same way. In this case
parameters [c92 and c93] must be set.
9.7 Sensor correction procedure
9. Other Information
9.5 Compressor switch-on delay / pre-agitating
(Only useful when using a robot)
If the milk cooling tank is filled by a robot, filling from below takes place via the tank
outlet. For some tank types, the temperature sensor is positioned very close to the
tank outlet. For this reason, an increase in the milk temperature is measured during
filling, although the actual milk temperature has not yet risen (due to a heat bubble at
the outlet by the type of filling). This leads unnecessarily to the frequent switching on of
the compressor and thus to an increased wear of the cooling system.
The parameter P6 can be used to parameterize a 'pre-agitating time' in which the
agitator starts before the compressor is switched on. This is intended to ensure that
the warm milk at the outlet is mixed with the remaining cold milk in the tank and the
compressor is switched on only after the pre-agitating time has elapsed if the total milk
quantity is above the target temperature.
.6 Emergency cooling / Sensor fault
9
In the event of a faulty temperature sensor, a fault code is displayed:
F56 fault configuration broken sensor
F57 fault configuration sensor short circuit
F58 fault configuration sensor range exceeded
Emergency programme
A timer can be set in parameter [P4].
On pressing the COOL button, the compressor and agitator will run continuously
until the time set on the timer expires.
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