User manual

The world of flow
Seite 5
3. Function Description
This instrument can be used as a rate meter and as a
pulse counter.
The instrument has been pre-programmed in the factory
and must be adapted to your process for both the rate
meter function and pulse counting (see Section 5 –
Programming).
The instrument is ready for operation when the
programming input is not wired. You can switch
between Rate meter and Pulse Counter displays
using the S/E key during operation at any time.
The instrument has two counter inputs. Use counter
input A (“High” active) for rate meter with pulse
sequences up to 10 kHz; use input B (“Low” active
or “High” active) for pulse counter with pulse sequences
up to 30 Hz or 10 kHz.
The backlighting is activated and load on the internal
battery is reduced by applying an external supply
voltage of 24 VDC.
The world of flow
Seite 6
All stored data is lost when the battery is replaced.
The message “260_ xx” (xx for software
version number)
appears after the new battery is installed.
The instrument
is ready to operate after the S/E key is depressed,
which activates the factory programming.
Rate meter
The rate meter operates by the principle of period
length measurement with ARS (Auto Range System).
You can adapt the display to your operation using
the programming sequence:
1. Input the physical unit of the rate meter
(time basis)
2. Select accuracy
3. Set sensor pulse constant, and
4. If necessary, program a suitable scaling
factor.
ARS helps minimize display process-related fluctuations
depending on the selected accuracy, rounds off the
displayed value, and sets the decimal point automatically.