Page 311 - Bürkert

Operation and display (common to the various versions)
When mounted in a pipe (compact version) or connected to a flowmeter (remote version) in series with one or two valves, the 8025 batch controller makes it
possible to carry out a dosing of one or several quantities of liquids. The unit controls the opening of the valves and measures the quantity of the fluid
which flows. The unit also closes the valves when the preset quantity has been delivered.
The electronic component needs a voltage supply of 12 - 36 V DC or 115/230 V AC.
The device is equipped with 4 digital inputs (DI1 up to DI4), 2 transistor outputs (DO1 configured as a pulse output and DO4 configured as state output, by default), 2 relay
8025 Batch controller The second relay output can be used to activate another valve, to initiate alarms or to generate warnings.
outputs (DO2 always configured to control the valve and by default parameterize of 100% of the batch quantity and DO3 configured as alarm output by default), two volume or mass total-
izers and two batch totalizers.

The following dosing modes are possible:
- Locally started dosing of free quantity:
the user enters the quantity to be filled and starts the dosing from the keypad.
- Locally started dosing of preset quantity:
the user selects a quantity which has been preset and starts the dosing from the keypad.
- Locally started dosing of free/preset quantity
the user enters the quantity to be filled or selects a quantity which has been preset and starts the dosing from the keypad.
- Dosing controlled by a PLC unit
the user selects a quantity which has been preset and starts the dosing using binary inputs.
- Locally/remote selection of preset quantity and dosing controlled by a PLC unit:
the user selects a quantity which has been preset from the keypad or using binary inputs and starts the dosing using binary inputs.
- Automatic dosing controlled by variation of pulse duration:
the quantity of the dosing is directly proportional to the duration of a pulse.
- Remote dosing determined by Teach-In:
Teach-In of the dosing quantity using binary inputs.
- Local dosing determined by Teach-In:
Teach-In of the dosing quantity from the keypads.

The device is calibrated by means of the K-factor which is either entered or determined via the Teach-In functions.
User adjustments, such as measuring range, engineering units, pulse output, etc. are carried out via the device operators interface.

The operation is specified according to five levels:

Indication in operating mode/ Parameter definition Test Information History
display
• dosing amount • language • input test • Display of error, alarm • Display of the 10 latest
• dosing mode • engineering units • output test and/or warning mes- batches
• main quantity totalizer • K-factor/Teach-In function • frequency test sages
• daily quantity totalizer with reset • selection of dosing mode • warning and fault messages
function • over run correction generating
• main batch totalizer • alarm • configuration mode
• daily batch totalizer with reset • outputs configuration
function • reset both quantity/batch total-
izers (main and daily)
• Brightness of the display
(backlight)

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