Power Supply; Changing Chart Paper - Thermo Scientific Revco Installation And Operation Manual

13.2 Power Supply

13.3 Changing Chart
26 Installation and Operation
Figure 6. Chart Buttons
The recorder normally uses AC power when the system is operating. If AC
power fails, the LED indicator 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.
To change the chart paper, complete the following steps:
Paper
1. Locate the pressure sensitive buttons at the front, upper left of the
recorder panel.
2. Press and hold the change chart button 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 5).
4. Replace the center nut and hand tighten. Press the change chart
button again to resume temperature recording.
Thermo Scientific Recvo Blood Bank Refrigerators
Chart Recorders