TOTALINE MultiRef User And Service Manual page 21

4 USING MULTIREF UNIT
4.1 Setting SuperHeating
By means of the
measured by T1 probe or the value of SuperHeating calculation.
4.2 Setting Subcooling
By means of the
measured by T2 probe or the value of SubCooling calculation.
4.3 Setting T2-T1
By means of the
measured by Tamb probe or the value of T2-T1 calculation.
4.4 Display back-lighting
By means of the
automatically after 16 seconds (this parameter may be set by the user, see chapter 5 for
more information), or by pressing the
4.5 "zero Plus" Function - Atmospheric Pressure calibration
MultiRef manifold has a special function called "Zero Plus" - Atmospheric Pressure Calibra-
tion. This function must be used when one wants to know with the utmost accuracy the
reading values of pressure near zero.
To perform this operation, it is necessary to bring the inner pressure of MultiRef to the atmo-
spheric value and press the
display means that the operation has been successful.
If the above function is performed with a different instrument inner pressure than the atmo-
spheric one, this could cause an incorrect calibration of the instrument.
Therefore, perform this function with open knobs, in connection with the atmosphere.
5 SERVIcE OPERATIONS.
5.1 Modifying MultiRef parameters
MultiRef has an inner series of parameters, that handle its functioning. These parameters
can be modified by the user in order to personalize the instrument according to his own
needs.
To enter the menu of parameters configuration, press the
The message "tOFF" in the refrigerant range means that you are inside the parameters
menu.
Parameter
Description
name
tOFF Time of instrument self-turning off
t bL Time of display back-lighting self-turning off
tLOG Time of data transfer to Datalogger
key, it is possible to display alternately the value of the temperature
key, it is possible to display alternately the value of the temperature
key, it is possible to display alternately the value of the temperature
key, you can activate the display back-lighting. The device turns off
key for more than 4 seconds; the message "done" on the
WARNING
key a second time.
key for more than 3 seconds.
Default value
300 seconds
16 seconds
16 seconds
Range
(OFF) 10 ÷ 3600
(OFF) 10 ÷ 255
10 ÷ 3600
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