CONTROL NAME FUNCTION
Note:
Pressing a keypad whose LED’s is already illuminat-
ed, will cause the computer to exit from that mode with the
exception of the “RUN” mode.
(IDLE Mode) This action will return the controller
to the IDLE mode (no displays in
Mode Select section are illuminated).
The term IDLE MODE will be used
during installation and troubleshoot-
ing of the unit.
c. System Status
Six LED modules display the system
status of the unit during a program cycle.
INDICATOR NAME FUNCTION
COOL
Indicator illuminates to indicate
when the COOL solenoid valve is
open, injecting liquid nitrogen into
the freezing chamber.
COOL +
Indicator illuminates to indicate
when the COOL + solenoid valve is
open, injecting additional liquid
nitrogen into the freezing chamber.
HEAT
Illuminates when heating circuit is
energized.
WAIT
Illuminates when the program is
being run, indexing through, or being
edited contains a WAIT section.
ERROR
Illuminates when the controller
senses the presence of an error
condition.
END
Illuminates when the program is
being run, indexing through, or being
edited contains a END section.
d. TC Scanner
Three keys control thermocouple
scanner operation for sample only, cham-
ber only, or sample and chamber alter-
nately. This temperature information is
then relayed to the strip chart recorder.
CONTROL NAME FUNCTION
SAMP
Selects the Sample thermocouple as
the temperature to be sent to the
recorder. The red LED illuminates
when the controller is sending out
Sample temperature to recorder.
CHAM
Selects the Chamber thermocouple
as the temperature to be sent out to
the recorder. The red LED illumi-
nates when the controller sending out
chamber temperature to the recorder.
SCAN
Tells computer to scan both thermo-
couples at fixed rate (two seconds
for the chamber thermocouple,
followed by ten seconds for the
sample thermocouple) and outputs
the information to the recorder.
Note:
The SAMP and CHAM LEDs will alternately illumi-
nate during scanning to indicate the thermocouple being
scanned at that moment.
Note:
The SCAN keypad does not have a LED indicator.
e. Program Display
The digital LED display of
the selected program, section
number, rate, hold time, elapse
time, and setpoint temperatures.
f. Display
Four indicators permit the operator to toggle the
display of the programmed/actual chamber or cham-
ber/sample temperature.
CONTROL NAME FUNCTION
PROG/ACT
Manually toggles the display section
between the programmed, or actual
temperature value.
Note:
When in PROG mode, automatically toggles
between programmed temperature and target temperature
for that programmed section.
CHAM/SAMP
Must be in ACT, manually switches
the display section between the CHAM and SAMP value.
Models 1010 and 1011__________________________________________________________________________Operation
4 - 2
Figure 4-3
Figure 4-4
Figure 4-5
Figure 4-6
