Instrutech Busy Bee PCM301 User Manual page 22

Instruction Manual PCM301 Busy Bee
High & Low Trip Point - Both High & Low Trip Point switching characteristics are assigned to each relay.
If the pressure in the vacuum system is above the setpoint (High Trip Point threshold), the corresponding LED
(<SP1> or <SP2>) is lit solid and the corresponding relay will turn on (energize). If the pressure in the vacuum
system is below the setpoint (Low Trip Point threshold), the corresponding LED (<SP1> or <SP2>) is lit solid and
the corresponding relay will turn on (energize).
When both High Trip Point and Low Trip Point are assigned to each relay, the setpoints can only be programmed
via the diagnostic port. However after using the diagnostic port to set the High Trip Point and Low Trip Point,
only the Low Trip Point can be adjusted via the corresponding SP1 or SP2 push button on the gauge.
WARNING!
Malfunction
If processes are controlled via the analog output signal, keep in mind that by pushing an <SP> button the measurement
signal is suppressed and the corresponding threshold value is output instead. This can cause malfunctions. Push the <SP>
button only if you are sure that no malfunction will occur.
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