Rice Lake Condec 3030 - Manual (Page 11)

2.2 Using the Backlight
The backlight is controlled by the dedicated backlight key. It toggles
on and off when the key is pressed; this is one of the few functions
that cannot be controlled by the serial interface. There are no user
configuration settings for the backlight.
2.3 Using the Zero Function
When the ZERO KEY is pressed, the calibrator will zero the current
display if a pressure mode is selected, and the pressure is within the
zero limit. The zero limits are within 5% of the full scale range of the
selected sensor. If the display indicates "OL," the zero function will
not operate."
2.3.1 Internal Sensor and Pressure Module (non-absolute)
When a sensor or module is selected on the current display and the
ZERO KEY is pressed the calibrator subtracts the current reading
from the output. The zero limits are within 5% of the full scale range
of the selected sensor. If the display indicates "OL," the zero function
will not operate.
2.3.2 Absolute Internal Sensor or Absolute Pressure Module
When an absolute pressure module is selected on the current
display and the ZERO KEY is pressed the calibrator prompts the user
to enter the barometric reference pressure. This is done using the
arrow keys (F2 and F3 Keys). The sensor port should be open
(vented) to atmosphere while performing this procedure.
2.4 Other Menu Controlled Functions
There are eight 'sub-main' menus that can be accessed through the
MORE option of the Main Menu. A 'sub-main' menu contains three
options. The first option is unique to the function. The second and
third options of a 'sub-main' menu are always the same. The NEXT
option leads to the next 'sub-main' menu and the DONE option
returns home . For the last 'sub-main' menu the NEXT option wraps
around to home. See Figure 4 for a detailed mapping of the menu
structure.
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