Chart Recorders
Thermo Fisher Scientific
Laboratory and Plasma Freezers
17
Figure 3.
Pressure Sensitive Chart Buttons
10.2 Changing Chart
Paper
To change the chart paper, complete the following steps:
1.
Locate the pressure sensitive buttons at the front, upper left of the
recorder panel.
2.
Press and hold the change chart button (#3 on the upper left of the
panel) for one second. The pen will move off the scale.
3.
Unscrew the center nut, remove the old chart paper, and install new
chart paper. Carefully align the day and time with the reference mark on
the recorder panel (a small groove on the left side of the panel, shown in
Figure 2).
4.
Replace the center nut and hand tighten. Press the change chart button
again (#3) to resume temperature recording.
10.3 Power Supply
The recorder normally uses AC power when the system is operating. If AC
power fails, the LED indicator on the recorder flashes to alert you to a power
failure. The recorder continues sensing cabinet temperature and the chart
continues turning for approximately 24 hours with back-up power provided
by the nine-volt battery.
The LED indicator glows continuously when main power is functioning
and the battery is charged.
When the battery is low, the LED flashes to indicate that the battery needs
to be changed.
1
2
3
CHANGE CHART
