Labconco RapidVap Vacuum, N2 and N2/48 Evaporation Systems 7910015 - Manual (Page 45)

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Chapter 4: Using Your RapidVap
Product Service Domestic 1-800-522-7658, International 816-333-8811
secure the latches and press RUN. The RapidVap will
resume operation at the same set point parameters and
the timer will continue to count down from the time at
which the RapidVap was stopped.
End Alarms
The RapidVap has two means to signal the completion
of a run. The first method is determined by the operator
when the run time is set as described in the previous
paragraph, Time Setting Guidelines. In the second
method the RapidVap will automatically sense when an
evaporation process is nearly complete by comparing
temperatures in the unit. When the RapidVap detects
end point, it will sound an alarm and the LED next to
the “PREHEAT/ END ALARM” button will flash.
This alerts the operator to closely monitor the run’s
completion. This method performs best when large
samples are processed at high temperatures. When
small samples or low temperatures are used, the alarm
may signal prior to the end of evaporation. The audible
alarm may be canceled by pressing the “PREHEAT/
END ALARM” button. The LED will continue to flash
until the “STOP” button is pressed. If the button is
pressed again, the audible alarm will become active
again.
RS-232 Communications
Some RapidVaps are equipped with RS-232
communications capabilities. This hardware and
software allows a user to perform all the front panel
functions from a standard RS-232 link.
Communications will be at 4800 baud, no parity, 8 bit
word, 1 stop bit, and a 3-wire interface (TXD, RXD and
circuit common). The RS-232 link will be duplex or
two-way, that is, it will allow the RapidVap Basic and
N
2
models to be controlled externally (incoming
commands) as well as provide status information
coming out of the RapidVap (outgoing status). All
communications will be done in standard ASCII format
using the programming syntax below.