The chart recorder contains eight temperature
ranges and is factory-programmed for the
freezer.
1. Press and hold button #3 for one second,
then let the pen move off the chart paper.
2. Press and hold for five seconds either
button #1 or button #2.
3. Release the button and the green LED will
begin to flash. Count the number of flashes to determine the present
program setting.
4. To change the program setting, press the left or right arrows to increase
or decrease the count.
5. When the desired program number is flashing, press button #3 to
bring the pen arm back onto the chart. Recording will begin in the
new program.
Caution
The recorder must be in service for 24 hours before performing
the following calibration procedure.
s
1. Place an accurate thermometer in the chamber next to the recorder
probe.
2. Temperature probes for the recorder are located in the left front corner
of the freezer chamber (Figure 1-4).
3. After about three minutes, compare the thermometer reading with the
chart recorder reading.
4. If an adjustment is necessary, press the #1 button to move the pen to
the left or the #2 to move the pen to the right. The button must be
held about five seconds before the pen begins to move. Release the
button when the pen position matches the thermometer.
Note
The felt-tip pen on the recorder requires periodic replacement.
Usually the ink will appear to fade before replacement becomes necessary.
Additional pen tips may be purchased from Fisher.
s
5-8
Isotemp Basic
Fisher Scientific
Section 5
Factory Options
Calibrate the Chart
Recorder
Program
From
To
1
-40
30°C
2
0
60°C
3
-100
38°C
4
-5
50°C
5
0
100°C
6
-100
200°C
7
-115
50°C
8
-10
70°C
Change the Recorder
Temperature Range
Summary of Contents for Isotemp Basic -86C
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