6.5.4 Lock and release operating buttons
The operating buttons can be locked in order to protect the device
when using a process control system or against unauthorized
access.
Personnel:
n
Operating personnel
1.
Change to the main menu.
2.
Press and hold down the [ENTER] button.
3.
Press and hold down the [Down] arrow button within 4 sec-
onds.
4.
Hold down both buttons for 4 seconds.
In the display the descriptions of the buttons are replaced
by [---].
The entry function is now locked.
The display can be switched between basic window and
graphic display.
Personnel:
n
Operating personnel
1.
Press and hold down the [ENTER] button.
2.
Press and hold down the [Up] arrow button within 4 seconds.
3.
Hold down both buttons for 4 seconds.
In the display the descriptions of the buttons show up
again.
The device can be operated again.
6.6 Specifying temperature limit values
The temperature limits define the temperature range of your appli-
cation, i.e. in which range temperature control can take place.
Lock the operating button
Release operating buttons
Operation
Variocool
53
Summary of Contents for VC 1200
Page 47: ...Fig 13 Menu structure part 1 Operation Variocool 47...
Page 48: ...Fig 14 Menu structure part 2 Menu structure for Graph Clock and Standby Operation Variocool 48...
Page 103: ...General Variocool 103...
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