Description Of Functions - Bühler technologies TC-Standard Kurzanleitung

TC-Standard (+)
If the display flashes during operation or an error message ap-
pears, please refer to bullet "Troubleshooting".
Please refer to the data sheet for performance data and max-
imum ratings.

5.1 Description of functions

The cooler is controlled by a microprocessor. With the factory
preset the control already incorporates the various character-
istics of the built-in heat exchangers.
The programmable display shows the block temperature in
the selected display unit (°C / °F) (factory preset °C). Applica-
tion-specific settings can easily be configured guided by the
menu, using the 5 buttons. For one, this applies to the target
outlet dew point, which can be set from 2 to 20 °C (36 °F to
68 °F) (factory preset 5 °C/41 °F).
And then the warning thresholds can be adjusted for low and
excess temperature. These are set relative to the outlet dew
point τ setting.
a
For the low temperature the range is τ
imum 1 °C/ 34 °F cooling block temperature), for the excess
temperature the range is τ
a
both values are 3 K.
The flashing display and the status relays indicate the condi-
tions are below or above the configured warning range (e.g.
after switching on).
The status output can e.g. be used to control the sample gas
pump to allow for the gas flow to only be switched on once
the permissible cooling range has been reached or shut off the
pump in the event of a moisture detector alarm.
The separated condensate can be drained via connected peri-
staltic pumps or add-on automatic condensate drains.
Fine mesh filters can also be used, which in turn can be in-
stalled in optional moisture detectors.
The glass dome allows the dirt level of the filter element to
easily be determined.
The moisture detector is easy to remove. This may be required
if a condensate enters the cooler due to a malfunction and the
peristaltic pump or the automatic condensate drain is unable
to remove it.
5.2 Delta T control option
Not all applications require an outlet dew point of 5 °C (41 °F).
In some applications a higher dew point is sufficient. In other
applications a stable outlet dew point doesn't matter, it's
enough for the gas to be dry, so if the outlet dew point has an
adequate difference in temperature below the ambient tem-
perature.
Here the electronics measure the ambient temperature and
regulate the outlet dew point to an adjustable value below it.
This extends the potential cooling capacity to the limits of the
heat exchanger. Here it's important to note the outlet dew
point fluctuates along with the ambient temperature and a
stable dew point cannot be a prerequisite for the measure-
ment.
16 Bühler Technologies GmbH
-1 to - 3 K (at a min-
a
+1 to +7 K. The factory presets for
The target temperature range is defined by the ambient tem-
perature, the adjustable temperature difference and the
alarm limits. If the block temperature is not within the target
range with active Delta T-control, the status message "dt" will
flash in the display.
Example: At a difference of 30 °C (30 K/54 °F), at a set outlet
dew point of 5 °C (41 °F) this means the dew point remains
stable up to an ambient temperature of approx. 35 °C (95 °F),
and the safe drop is only preferred over the ambient temper-
ature with ambient temperature peaks over 35 °C (95 °F). The
cooling capacity specified in the cooling capacity graphs at
35 °C (95 °F) is then available at above 35 °C (95 °F).
5.3 Use of menu functions
Brief description of the operating principle:
The unit is operated using 5 keys. Their functions are:
Button Section
Display • Switches from the measurement dis-
play to the main menu
or
Menu • Selects the menu item displayed
OK
Enter • Applies an edited value or a selection
Display • temporarily switches to the alternative
measurement display (if option in-
stalled)
Menu • Back
Enter • Increase value or browse selection
• Note:
▪ Press button 1 x = changes para-
meter / value by one;
▪ Hold button = fast mode (numerical
values only)
▪ Display flashes: modified para-
meter/value
▪ Steady display: original display/
value
Display • temporarily switches to the alternative
measurement display (if option in-
stalled)
Menu • Next
Enter • Reduce value or browse selection
Menu • Move one level up
ESC
Enter • Return to menu
Changes will not be saved!
• Sets a menu to favourite.
F
(Note: The favourite menu will also be
or
activated with the menu locked!)
Func
Functions
BX440017 ◦ 03/2024