GAS 222.20 Denox
• The device switches or circuit breakers used as a discon-
necting device must comply with the applicable require-
ments of IEC60947-1 and IEC60947-3 and be suitable for
the application. These may not be installed in the mains
connection cable or interrupt the protective conductor
and must disconnect all current-carrying conductors. It
must be installed in the vicinity of the system, be easily
accessible, and be marked as the disconnecting device.
• An overcurrent protection device must be fitted as a dis-
connecting device in all supply lines but must not inter-
rupt the protective conductor. If fuses are used, all must
have the same rated value and the same tripping charac-
teristics and must be installed side by side. They are
preferably to be placed before the power switch. Radio in-
terference control equipment between the AC input and
overcurrent protection device is allowed. Fuses and
single-pole circuit breakers are not built into the neutral
conductor of multi-phase devices.
If the above-cited isolating devices are already in the system,
these no longer need to be provided by the operator for the
system.
Please see the chapter 'Technical Data' for the applicable val-
ues of the isolating devices.
5 Operation and controls
NOTICE
The device must not be operated beyond its specifications.
5.1 Basic function of the probe controller
5.1.1 Controller function
After switching on the combination the probe is heated up.
The display with the current temperature will light up on the
regulator. As long as the set operating range is has not yet
been reached, the display will flash and the status contact is
in Alarm position. Once the working range has been reached,
the status contact switches and the display is steady.
The target temperature, the working range of the probe and
the temperature unit (°C/°F) are set using the three control
buttons on the controller. This is described in chapter "Opera-
tion and use".
The factory settings are:
Unit °C
Sample probe temperature 280 °C, operating range ±10 °C
Heated adapter 160 °C, operating range ±10 °C
10
Bühler Technologies GmbH
5.2 Use of menu functions
Overview of the operational principal:
Use this short description if you have experience with the
device.
Operation is carried out by only the keys with the following
functions:
Key
• Switch from measurement display to main
menu
• Selection of the display menu item
• Accepting the changed value or selection
• Switch to the upper menu item
• Increase of the value of switching the selection
• Temporary display of the alternative measure-
ment display (if option is installed)
• Switch to lower menu item
• Decrease of the value of switching the selection
• Temporary display of the alternative measure-
ment display (if option is installed)
Function
BX460035 ◦ 04/2021