Using The Backlighting; Using The "Zero" Function; Internal Relative Pressure Sensor; Internal Absolute Pressure Sensor - WIKA Obsolete CPH65I0 Betriebsanleitung

6 Commissioning, operation
GB
6.3

Using the backlighting

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.
6.4

Using the "ZERO" function

When the "ZERO" key is pressed, the calibrator will zero the active 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.

6.4.1 Internal relative pressure sensor

When a sensor is selected on the active 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.

6.4.2 Internal absolute pressure sensor

When an absolute sensor is selected on the active display and the "ZERO" key is pressed, the
calibrator prompts the user to either set or default the pressure reference.
If the set option is selected, 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.
20 WIKA Operating Instruction, Model CPH65I0