Description Of Functions - Bühler technologies PCS.smart+ AMS Notice De Montage

PCS.smart+ AMS
Description of signal outputs
Function / Description
contact type
Regard- internal the following
ing S2) changeover device
contact: max. statuses can
250 V AC / be indicated
150 V DC, 2 A, via two
50 VA switching
outputs:
Regard- 4-20 mA ana- Signalling of
ing S3) logue output actual tem-
(R <500 Ω) perature
Load
(please use
shielded
cables)
5 Operation and control
NOTICE
PCS.smart+ AMS is a portal device which must always be op-
erated inside the original transport case. The side cover flaps
must be open during operation.
Only operate and transport the unit upright. Operating the
device with the cover flaps closed or outside the specifications
is prohibited!
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.
14 Bühler Technologies GmbH
Contact between 3 and
2 closed (alarm)
• No mains voltage
and/or actual tem-
perature outside
the alarm
thresholds
Contact between 3 and
1 closed (ok)
• Mains voltage at-
tached + actual
temperature
within the alarm
thresholds
With moisture detector
option
Contact between 3 and
2 closed (alarm)
• The moisture de-
tector registers re-
sidual humidity in
the sample gas or
cable break: Error
message
Contact between 1 and
3 closed (ok)
• no residual mois-
ture in measuring
gas / no cable break
With temperature sig-
nal option
T = -20 °C ≙ (-4 °F) ->
Cooler
4 mA/ 2 V
T = 5 °C ≙ (41 °F) ->
Cooler
9 mA/ 4,5 V
T = 60 °C ≙ (140 °F) ->
Cooler
20 mA/ 10 V
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 (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+ AMS, if the ambient temperat-
ure 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.
-1 to - 3 K (at a min-
a
BX464007 ◦ 10/2021