Buhler SCS 104, Инструкция по установке и эксплуатации

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SCS 104
1.2.4 Manual control
Manual control is exercised using the rotary (mode) switch (28). The selectable system modes are: "Blow-back", “Zero Air”,
“Sample (external control)”, "Span 1", "Span 2", "Span 3", "Span 4", "Span 5", and "Span 6". The selected mode is indicated by the
system mode LEDs (29). Rotating the mode switch to any position other than sample (external control), will direct the selected
calibration gas or air to the corresponding outlet.
The valves are switched with a short time delay, so the correct mode can be selected before any change in gas flow takes effect.
1.2.5 External control and monitoring
The SCS can be externally controlled only if the mode switch (28) is in the exernal control (sample) position. Each mode is selec-
ted using the corresponding dry contacts at the external control terminal block (40) located on the rear panel. When no external
contact is closed the SCS is in the sample mode. The externally selected mode is shown by the system mode display LEDs on the
front panel (29) and can be monitored at the mode output terminal board (41) on the rear panel. LED and status output for ex-
ternal control (sample) position are also active.
Alarms for moisture, flow and temperature can be monitored at the status output terminal block (42) on the rear panel. An open
contact indicates status OK. A closed contact indicates an alarm. The normal status of the contacts may be changed on the con-
troller module from normally open to normally closed.
1.3 Scope of delivery
– SCS analysis gas conditioning system
– Product Documentation
4 Bühler Technologies GmbH BECS0031 ◦ 02/2020