Description Of Functions; Sample Gas Pump Cold Start; Optional Heated Line; Use Of Menu Functions - Bühler technologies PCS.smart Guía Rápida

PCS.smart (+)
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 (factory pre-
set 5 °C).
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 cooling block temperature), for the excess temper-
ature the range is τ +1 to +7 K. The factory presets for both val-
a
ues 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 is drained via connected peristaltic
pump.
It further has a fine mesh filter. 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 neces-
sary if condensate enters the cooler due to a malfunction and
the peristaltic pump can no longer remove it.

5.2 Sample gas pump cold start

During normal operation the sample gas pump will only be
activated once the block temperature reaches the target tem-
perature range.
In the case of the PCS.Smart, if the ambient temperature is
around freezing, the system may need to be heated with
warmer gas. The pump can be started manually for this pur-
pose.
The sample gas pump can be activated for 30 seconds from
the 6AS.P menu, the sample gas pump and status will switch
over. This process may be repeated any number of times until
the minimum block temperature of 2 °C has been reached.
During this period the status text "Manu" will flash in the dis-
play.
WARNING
Operate the sample gas pump manually at your own
risk.
Only use dry air.
14 Bühler Technologies GmbH
-1 to - 3 K (at a min-
a

5.3 Optional heated line

Both a self-regulating as well as a non-self regulating line can
be connected to units with the "heated line" option. With non-
self regulating lines the temperature is regulated by the built-
in regulator on the PCS.smart.
The built-in regulator can be (de)activated via the menu. The
regulator is factory deactivated.
With the built-in regulator activated the Pt100 for the heated
line will be monitored. If a sensor error occurs or no line is
connected, the display will show an error message.
Without a heated line requiring regulation connected, deac-
tivate the built-in regulator via the menu and the error mes-
sage will automatically be cleared.
The message MAdd in the display indicates if a heated line
with Pt100 is connected and the regulator is deactivated. The
regulator must be reactivated in the menu.
So long as the heated line is heating up, the display will show
the status init. This condition will persist for a few minutes
after the target temperature has been reached until the heat
has spread evenly throughout the heated line.
On the Smartline the heat-up period varies by ambient tem-
perature and initial temperature. At an ambient temperature
of 25 °C the heat-up phase should not be much more than 30
minutes.
During the heat-up phase the status contact will be in alarm
position.

5.4 Use of menu functions

Fig. 1: Display unit
BX464004 ◦ 08/2018