Buhler SCS 104, Installation And Operation Instructions Manual

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SCS 104
Factory settings
Display → toP → rst
This setting restores the factory settings.
Parameter range: Yes : factory settings restored.
No : Exit menu without making changes.
Factory setting: No
Note: This menu will be hidden if the menu is locked.
Exit submenu 1
Display → Submenu → E
Selecting this will return you to the main menu.
5.3 Manual operation of the SCS (front panel module CM0191)
The active gas path is selected with the mode switch (28). Calibration gas flow is selected by rotating the mode switch to the de-
sired span position as indicated by the system mode LED (29). The condition "Sample" starts active after start of the system.
To enter device menu push mode switch (28) for some seconds until dispay (30) shows “ SCS ”.
5.4 Monitoring system operation on the controller module (front panel module
CM0191)
The controller module (24) contains the display (30) for the current cooler temperature. The temperature shown in the display is
that of the cooling block which is nearly identical to the cooler gas outlet temperature and therefore, the outlet dew point. If the
cooler temperature rises above 8 °C (46 °F), the sample gas pump will stop.
On the left side of the CM0191 panel are the alarm LEDs for temperature moisture and flow.
If moisture is detected by the moisture sensor (4), the moisture alarm LED is illuminated, and the sample gas pump is turned off.
The Flow LED turns red, if the flow at flowmeter 8a is below the alarm level. For correct monitoring the flow has to cross the level
once.
5.5 External control
To enable external control of the SCS the mode switch must be in the sample (external control) position. If the mode switch is in
any other position, external control is disabled.
To activate external selection of any of the modes the corresponding terminals on the external control terminal block (40) must
be wired to an external contact. When an external contact is closed, that operational mode is engaged. If the mode switch is in
the sample (external control) position and NO external contacts are closed, the SCS is in the sample mode.
Multiple modes can be selected at the same time.
5.6 External monitoring
The mode and status of the SCS can be monitored by external devices. All outputs are dry contact and are available during both
manual and sample (external control).
The system mode contacts are available at the mode output terminal block (41). A closed contact indicates the corresponding
mode is activated. If no contacts are closed and the mode switch is in the sample (external control) position, the SCS is in the
sample mode.
The status output contacts are available at the status output terminal block (42). The sample gas path activity is defined by the
status of the cooler, flow and moisture detector. In normal operation the alarm status contacts for the cooler and moisture de-
tector are open. Contact closure indicates moisture has been detected, or the cooler has failed.
16 Bühler Technologies GmbH BECS0031 ◦ 02/2020