4 8 4 8 R e a c t o r C o n t r o l l e r
P a r r I n s t r u m e n t C o m p a n y
2
The Parr 4843 and 4836
Controllers have been replaced
with the new 4848 Controller.
This new controller brings digital
communications to all of the
functions of these modular reac-
tor controllers.
The 4848 Controller contin-
ues to offer all of the features
previously included in the 4843
Controller; namely:
PID control
•
Ramp and soak programming
•
Separate heating and cooling
•
control loops
Motor speed control
•
Full or half power heater
•
option
Lockout relay and reset for
•
over temperature protection
Expansion modules for ta-
•
chometer, pressure, and high
temperature alarm
Auto tuning of PID param-
•
eters
In recent versions of the
4843 and 4836 Controllers, the
primary controller was equipped
with an RS232C digital commu-
nications port and software for
two-way communications with a
PC. The expansion modules for
4848 Controller with MCM, PDM and HTM expansion modules installed.
stirrer speed display,
vessel pressure read-
out, high temperature
protection, and mo-
tor current readout
could be ordered with
analog outputs that
required an analog
to digital conversion
board to log these
readings into a PC.
With the 4848
Controller, all of the
expansion modules as
well as the primary
temperature control-
ler are equipped with
bidirectional digital
communications [RS-
485] that enable the
user to not only log
all current reading to
a PC, but also to send
set points, stirrer
speeds, and alarm
values from the PC to
the 4848 Controller.
Modular Design
A total of seven different
modules are offered for the 4848
Controller. A maximum of three
expansion modules in addition to
the primary temperature control
can be installed in the 4848 Con-
troller. The user can select either
the Tachometer Display Module
or the Motor Control Module.
This either/ or option also ap-
plies to the High Temperature
Cut Off and External Tempera-
ture Limit Modules.
4848 Reactor Controller
