3.4  Final Display Mode
After the relative humidity and temperature codes appear, the LCD displays the
current relative humidity in %RH or temperature in °F or °C, depending on the
position of the display selection switch (refer to Figure 3-8).
Figure 3-8.  Display Selector Switch
At the same time, the temperature pen and humidity pen, one at a time, move to
the right a short distance and then move to the left to the zero position.  Then,
both pens, one at a time, move to the positions which correspond to the current
relative humidity and temperature.
At this point, the recorder is ready to use.