Bronkhorst Mini CORI-FLOW - Manual (Page 24)

BRONKHORST CORI-TECH B.V.
2.15 Electro static discharge
This instrument contains electronic components that are susceptible to damage by static electric discharges.
Proper handling procedures must be taken during installation, removing and connecting the electronics.
3 OPERATION
3.1 General
The Bronkhorst Cori-Tech B.V. instruments are designed in such a way that they will meet user process
requirements in the best possible way.
The mini CORI-FLOW meters/controllers can be powered from +15 Vdc to +24 Vdc.
When providing your own power supply be sure that voltage and current rating are according to the
specifications of the instrument(s) and furthermore that the source is capable of delivering enough power to the
instrument(s).
Cable wire diameters should be sufficient to carry the supply current and voltage losses must be kept as low as
possible. When in doubt: consult factory.
Mini CORI-FLOW instruments can be operated by means of:
1. Analog interface (0...5Vdc/0...10Vdc/0...20mA/4...20mA)
2. RS232 interface (connected to COM-port by means of special cable on 38400 Baud)
3. FLOW-BUS
4. PROFIBUS-DP
5. DeviceNet
6. Modbus
7. other fieldbus interfaces on request
Option 1 and 2 are always present on multibus instruments. An interface to any available fieldbus is optional.
Operation via analog interface, RS232 interface and an optional fieldbus can be performed at the same time.
A special parameter called “control mode” indicates to which setpoint the controller should respond: analog or
digital (via fieldbus or RS232). The RS232 interface behaves like a FLOW-BUS interface.
When using more interfaces at the same time, reading and operation can be done simultaneously without
problems. When changing a parameter value, the last value send by an interface will be valid.
Also the push-button switch and the LED’s on the left side of the instrument can be used for manual operation
of some options.
The green LED will indicate in what mode the instrument is active.
The red LED will indicate error/warning situations.
3.2 Power and warm-up
Before switching on power, check if all connections have been made according to the hook-up diagram which
belongs to the instrument.
Check fluid connections and make sure there is no leakage. If needed, purge the system with a proper fluid.
For a gas instrument only purging with gases is allowed. Liquid instruments may be purged with either a gas or
a liquid, whatever is needed for the purpose.
Turn on power and allow at least 30 minutes to warm up and stabilise. In cases where no electronics are
involved (valves only) warming up is not needed.
During warm-up period, fluid pressure may either be on or off.
3.3 Start-up
Turn on fluid supply gently. Avoid pressure shocks, and bring the instrument gradually up to the level of the
actual operating conditions. Also switch off fluid supply gently when shutting down.
page 24 9.17.050