WIKA CPH7600 - Handbuch (Seite 20)

20 WIKA operating instructions, model CPH7600
14051628.01 11/2012 GB/D
GB
6. Commissioning, operation
6.2 Using the backlighting
The backlight is controlled by the "LIGHT" option on the main menu. The light is toggled
on and off when the F3 key is pressed.
6.3 Using the "ZERO" function
When the ZERO key is pressed, the calibrator will zero the {active display}, as long as
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.
The ZERO key is only used for pressure.
6.3.1 External pressure module (not absolute)
When a pressure module is selected in the {active display} and the ZERO key is
pressed, the calibrator subtracts the current displayed reading from the output value.
The zero limits are within 10 % of the full scale range of the selected sensor. If the
display indicates "OL" the zero function will not operate.
6.3.2 External pressure module (absolute)
When an external absolute pressure module is selected in the {active display} and the
ZERO key is pressed, the calibrator prompts the user to enter the barometric reference
pressure. For this the arrow keys can be used. The sensor port should be opened
(vented) to atmosphere while performing this procedure.
6.4 Other menu controlled functions
There are 10 sub-menus that can be accessed through the "MORE" option of the main
menu. A sub-menu contains three options. The first option is unique to this function. The
second and third options of a sub-menu are always the same. The "NEXT" option leads
to the next sub-menu and the "DONE" option returns to home.