Bronkhorst Mini CORI-FLOW - Manual (Page 27)

BRONKHORST CORI-TECH B.V.
0V common
-
Current output signals
Sourcing
instrument
output I
+
mA
3.5 Operating conditions
Each instrument has been adjusted for customer process conditions, if possible.
Controllers or valves may not operate correctly, if process conditions vary too much, because of the restriction
of the orifice in the valve. Please change supply- or backpressure to improve control behaviour.
If this does not help, contact your local sales representative to assist you.
3.6 Manual operation
By means of manual operation of the push-button switch (#) some important actions for the instrument can be
selected/started. These options are available in both analog and BUS/digital operation modes.
(See also manual operation in document number 9.17.023)
These functions are:
- Reset (instrument firmware-program reset)
- Reset in case of an alarm
- Zeroing
- Restore factory settings (in case of unintentionally change of the settings)
for FLOW-BUS only:
- Automatic installation to FLOW-BUS (installs instrument to free address)
- Remote installation to FLOW-BUS (instruments will be installed by E-7000 or PC-software)
3.7 Analog operation
Digital instruments can be operated with analog signals through the 8-pin circular connector. The instruments
are compatible in use with analog instruments on this point.
Analog operated instruments, can be hooked up using an 8-wire shielded cable, connected according to the
Bronkhorst Cori-Tech standard.
Each electronic PC-board is set for one of the following output (and corresponding input) signals:
Signal output (sensor) input (setpoint)
code signal signal
A 0…5 Vdc 0…5 Vdc
B 0…10 Vdc 0…10 Vdc
F 0…20 mA (sourcing) 0…20 mA (sinking)
G 4…20 mA (sourcing) 4…20 mA (sinking)
For meters only the output signal is available.
At analog operation the following parameters are available:
- measured value
- setpoint (controllers only)
- valve voltage (controllers only)
Note:
When operating the instrument through the analog interface it is possible to connect the instrument to any
supported fieldbus system (or RS232-interface with special cable) for reading/changing parameters (e.g.
controller response or other fluid selection).
For FLOW-BUS versions of the instruments a readout/control module for digital instruments can be temporarily
connected to the M12 fieldbus connector.
9.17.050 page 27