Untitled - HUBER

unistat control V3.8.1
Appendix A - Program Directory
Program 5: Mains Failure Automatic Function
After mains failure the unistat or Unichiller goes on working with the same parameters as
before. Should there be a main power failure during tempering, the usual self diagnosis tests
are run on start up after restoration of the mains supply. The set tempering is restarted if no
error is present. If this happens during the run of a tempering program (see program 20), it
will continue.
Program 6: POKO max
This is only relevant for set option ‘actual value check’ in program 8. Setting of the upper
temperature level for the potential free contact (POKO) in 0.1K steps relative to the set point:
An entry of 1.5 in this program means, that the POKO stays activated until the actual value is
1.5K above the set point. Factory setting: 1.0K.
Program 7: POKO min
This is only relevant for set option ‘actual value check’ in program 8. Setting of the lower
temperature level for the potential free contact (POKO) in 0.1K steps relative to the set point:
An entry of 1.5 in this program means, that the POKO stays activated until the actual value is
1.5K below the set point. Default setting: 1.0K
Program 8: POKO Programming
There is a range of programming options for the POKO. Pressing the key allows the
operator to browse through the different possibilities. You will find the technical data of the
POKO in appendix D. Important: The OK – status always means the contact is normally
closed.
(0) POKO Function ‘OFF’
The POKO displays the OK – status when the unit is ready to operate. This condition
is after the internal controller check, ca 30sec after the switch on. The OK – status
will be ended by switching off the mains or a fault.
(1) POKO Function ‘Actual Value’
Using the program 6 and 7 you can set the upper and lower limit of the temperature
range around the set point.
The potential free contact displays the status, that the set point and the actual value
differ relative to a pre set temperature range. If the range is exceeded the potential
free contact is switched (away from OK – status), nor will further reactions of the
unistat or Unichiller will take place. If the actual value is in the range, the contact will
be re set in OK – status.
Example: The ‘actual value check’ has been activated. (External control mode).
Using Program 7 ‘POKO max’ a limit of 5K is set and with program 6 ‘POKO min’ 7K
given. The set point is at the moment at 27,5°C. The contact will switch the OK
status off as soon as the external sensor measures more than 32.5°C or less than
20.5°C. It depends on the tempering method set in program 3 whether the external or
the internal sensor is used.
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