RHEONIK Messgeräte GmbH REV. I, Apr. 2004
.
Operation Manual RHE 07, 08, 11
Page
15
Before starting zero calibration, make sure that the sensor RHM is installed and wired correctly ac-
cording to the wiring section of your installation manual. Observe as well the following steps to cali-
brate meter zero point:
• The remote unit RHE should be installed and connected to the power supply at least half an
hour prior to zeroing.
• If possible run the fluid through the sensor RHM for about 15 minutes at 100% flow speed to
establish normal operating conditions.
• Stop the fluid flow through the sensor with a downstream valve. Meter tubes must remain full
of fluid and contain no air or entrapped gas. Even small amounts of flow will cause an inaccu-
rate zero point calibration.
• Step through the measurement data display by pressing key #3 until you can enter the zero-
ing menu.
• Start the zero calibration process by pressing the zero key. While the unit is zeroing for about
20 seconds ZEROING active will be displayed. After the zeroing, Exit is displayed.
Note:
If you want to recover the prior zero point before activating the new zero calibration (for example
wrong zeroing) you just have to activate the Undo key before leaving the zero calibration menu. Only
then can you leave the zeroing setup menu. After this, the old zero point will be valid again.
2.1.3.2 Reset totalizer
This menu point is entered similarly to zero calibration. By pressing the Reset key the current totalizer
is set to zero. Activating the Undo function before leaving the Reset menu will give back the old
totalizer value before Reset.
2.1.3.3. Display units
You can choose between SI -units (European standard) or ANSI units (US-standard).
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