Description Of Functions - Bühler technologies TC-Standard+ Guía Rápida

TC-Standard (+)
The temperature signal can be read via the panel plug (S3) us-
ing the M12x1 connector. This plug is located next to the mois-
ture detector connectors at the top of the cooler.
Description of signal outputs
Function/ Description
contact type
Re- internal the following
gar changeover device
d- contact: statuses can
ing max. be indicated
S2) 250 VAC/150 via two
VDC, 2 A, switching
50 VA outputs:
Re- 4-20 mA Signalling of
gar analogue actual tem-
d- output perature
ing (R <500 Ω
Load
S3) )
Re- Digital out- Modbus RTU
gar put (RS-485)
d-
ing
S4)
14 Bühler Technologies GmbH
Contact between 3 and 2
closed (alarm)
• No mains voltage and/or
actual temperature out-
side the alarm
thresholds
Contact between 3 and 1
closed (OK)
• Mains voltage attached
+ actual temperature
within the alarm
thresholds
With moisture detector op-
tion
Contact between 3 and 2
closed (alarm)
• The moisture detector
registers residual hu-
midity in the sample gas
or cable break: Error
message
Contact between 1 and 3
closed (OK)
• no residual moisture in
measuring gas/no cable
break
With temperature signal op-
tion
T = -20 °C ≙ (-4 °F) ->
cooler
4 mA/ 2 V
T = 5 °C ≙ (41 °F) -> 9 mA/
cooler
4.5 V
T = 60 °C ≙ (140 °F) ->
cooler
20 mA/ 10 V
Interface default values
Baudrate – parity – stop bit:
19200 – Even – 1
Default ID: 10
The bus lines are not intern-
ally terminated.
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
After switching on the cooler the block temperature will be
displayed. The display will flash until the block temperature
has reached the preset target value (± adjustable alarm
range). The status contact is in the Alarm position.
Once the target temperature range has been reached, the
temperature will continuously be displayed and the status
contact switches over.
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.
-1 to - 3 K (at a min-
a
+1 to +7 K. The factory presets for
BX440017 ◦ 09/2021