Function of UA 300 D
5
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Version 2.03 27. Juni 2008
3
Function of UA 300 D
Parameters mentioned in this section are described in the Menu Structure section. It will normally not
be necessary to change the default settings of these parameters. Parameters that do not allow chan-
ging are termed fixed parameters below.
3.1
Selecting sensor type
The UA 300 D case controller used temperature sensors to perform control. All sensors connected must be the
same type and parameters are not set separately for the sensors. The type of sensor used can be defined by
the
Sensor Type
parameter (Menu 6−2−5). The following sensor types are usable:
L243 (K243)
Temperature range −50 .. 50
°
C
Type K243 sensor can be used in place of type L243.
Characteristics of these two sensors are identical.
K277
Temperature range −50 .. 50
°
C
5K3A1
Temperature range 0 .. 100
°
C
All leads running to and from the UA 300 D − especially those of the CAN bus − must be shielded! No
shielding is required on sensor leads when installed exclusively inside the refrigerated display case
and when external interference (for example from parallel power wires) is not to be expected.
3.1.1
Required and optional sensors
Temperature sensors used with the UA 300 D may be either required or optional depending on the set controller
type and operating mode. If required sensors are not connected, alarm is always generated in a sensor break.
With optional sensors, alarm is only generated when the sensors are included in sensor scan. Sensor scan
takes place automatically on first start of the controller. The number of sensors canned can be checked in Menu
(6−1) or with the LDSWin software. Required and optional sensors are listed below:
Single−zone operation
Controller type
Required sensors
Optional sensors
UA 111 X
UA 111 XP
R2.1
R2.2 R2.3 R2.4 R2.5 R2.6 R2.7 R2.8 R4.1
UR 141
R1.1 R4.1
R1.2 R1.3 R1.4 R4.2 R4.3 R4.4
Содержание UA 300 D
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