VWR VWRC0386A, Instruction Manual

Page: 53 / 94

1. Open the plastic door of the recorder and press button #3 until the
pen begins to move outward.
2. Unscrew the knob at the center of the chart and remove the paper.
3. Install the new chart paper, position the paper to the correct time line
and replace the knob.
4. Remove the cap from the felt pen and press button #3.
The chart recorder contains eight temperature ranges and is factory-
programmed for the freezer. To change the recorder range:
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.
The recorder must be in service for 24 hours before performing the
following calibration procedure.
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 2-4).
3. After about three minutes, compare the thermometer reading with the
chart recorder reading.
VWR Collection 7-9 VWR International
Section 7
Specifications
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 Program
Calibrate Chart Recorder
Install Chart Paper
Table 7-3. Recorder Temp
Change