Labconco FreeZone Triad Freeze Dry System 74000 Series - Manual (Page 23)

Chapter 4: Operating Instructions
Product Service 816-333-8811 or 1-800-522-7658 19
The segment numbers will always show “M” while operating in
the manual mode. Segment numbers are used only in the
automatic mode to identify portions of the programmed cycle.
Temperatures and vacuum are displayed in the units selected
during the set up procedure. Above 5.0 mBar the display will
show “HIGH” vacuum.
SHLF Shelf temperature
SAMP Sample probe (if probe is not installed, the display shows “ -”)
C °C
F °F
COL Collector Temperature
SEG Shows what segment is active and ramping or holding.
M Manual mode
VAC System vacuum level
m mBar
P Pascal
T Torr
(10)
To stop, push RUN/STOP button, which will turn off the
refrigeration system and the heater. To turn off the entire system,
turn the Power Switch OFF.
Automatic Control Operation
The Triad Freeze Dry System is equipped with a microprocessor-based
controller that permits temperature to be programmed using as many as six
different segments. The first segment is Pre-freeze with automatic “Max
Cold” setting and an adjustable time setting of 0, 3 hours to 99.9 hours or
indefinite. The additional five segments consist of a temperature ramp
function and a temperature hold function. There are five programs of six
segments each that can store settings. One of the five may be selected by
pressing the DISPLAY button until the AUTO indicator lights. Press the
UP/DOWN buttons to select the desired program, and then press ENTER.
The display will change to show the parameters for this program. The ramp
allows the temperature of the sample to be increased or decreased at any
desired rate within the capacity of the heating and cooling systems of the
Triad Freeze Dry System.
The Triad Freeze Dry System without samples on shelves is capable of
cooling at a rate of approximately .5°C/minute from 50°C to 0°C,
.25°C/minute from 0°C to –55°C. and can heat at approximately 3°C/minute.
Hold temperatures may be set anywhere from +50°C to –55°C in 1°C
increments. Hold times are set in hours.
SHLF=XXX SAMP=XXX °C
COL= XXX SEG =M VAC = HIGH m