ThermoForma 3033, Руководство по эксплуатации и техническому обслуживанию, Страница: 16 / 47

3.3 Temperature Alarm/Monitor
The Temperature
Alarm/Monitor contains a liquid
crystal display (LCD), red
Overtemp and red UnderTemp
lights, a Normal/Standby alarm
switch, Set Hi and Set Lo adjust-
ment screws and a three-position
selector switch.
a. LED Temp Display
The LCD display will show
actual chamber temperature, high
alarm limit or low alarm limit,
depending upon the position of
the three position switch.
b. High and Low Temp
Limit Switch
The High and Low tempera-
ture limits are set by placing the
three position switch to Set Hi or
Set Lo and turning the proper
adjustment screw until the desired
temperature appears in the LCD
window. When the switch is
returned to Actual the LCD dis-
plays the actual chamber tempera-
ture.
c. Temp Alarm Lights,
Audible Alarm and
Normal/Standby Switch
If the chamber temperature
exceeds the programmed high or
low limits, the appropriate red
LED lights and an audible alarm
will sound.
The audible alarm is silenced by turning the Normal/
Standby switch to the Standby position. The red LED will
remain lit until the alarm condition has been corrected.
Note: The alarm will ring back when the alarm condition has
been corrected as a reminder to turn the Normal/Standby switch
to the Normal position.
3.4 CO
2
Control Panel
The CO
2
Control Panel contains an amber LED inject light,
a red alarm light, an LCD readout and three “Sensi-Touch”
touch pad buttons.
a. CO
2
LCD Display
The LCD readout displays either the actual chamber CO
2
content or the CO
2
setpoint. Touching the inverted Y button
selects the mode of the display.
When the unit is in the Set mode the word SET appears on
the left side of the display. With the key switch turned to
Program, the CO
2
setpoint is set by pressing the up arrow or
down arrow buttons. Touching the inverted Y button again will
change the display to read the actual chamber CO
2
.
b. CO
2
Inject Light
When CO
2
is being injected, the amber Inject light will be
lit.
c. CO
2
Alarm Light and Audible Alarm
If the incubator CO
2
concentration deviates from the set-
point by +/- 1% (nominal) for more than 30 minutes, the red
LED alarm light will be activated and a pulsing audible alarm
will sound.
Pressing any of the nine Sensi-Touch buttons on the control
panel will silence the alarm and turn off the red alarm light.
If the alarm is not silenced, and the actual CO
2
concentra-
tion returns to /- 1% of the setpoint, the audible alarm
will turn off, but the alarm light will stay lit until a touch pad
button is pressed.
A CO
2
setpoint of 00.0 will disable the deviation alarm.
3.5 Auto Zero Function
The CO
2
Auto Zero Function compensates for any drift in
the CO
2
sensing system.
The Auto Zero solenoid activates approximately every four
hours to allow room air supplied by the air pump to enter the
CO
2
sensor cell. (The reading from the room air is considered
to be 0% CO
2
.) The calibration value is automatically adjusted
to make the actual reading 0%.
Note: The “%” indicator in the %CO2 display is turned off dur-
ing the Auto Zero cycle, which takes 3-4 minutes.
Model 3033 and 3860 Series _______________________________________________________________Operation
3 - 2
Figure 3-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com