Weidmuller Portacal 275 - Signal source and loop calibrator Manuale Utente Pagina 11

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Current source mode
1. Select source mode with the ‘source/sink mode’ lockable switch.
2. S
elect 0-20 mA or 4-20 mA range.
3. Set the ‘voltage/millivolt select’ switch to the 0-200 mV position.
4. Connect the instrument up as shown above.
To monitor the output, connect a multimeter across V+ and V-. The
v
oltage terminals will output 0-200 mV for 0-20 mA.
Voltage source mode
1. Select source mode with the ‘source/sink mode’ lockable switch.
2.
Select 0-20 mA (for 0-5 V output) or 4-20 mA range (for 1-5 V output).
3. Set the ‘voltage/millivolt select’ switch to the 0-5 V position.
4. Connect up the instrument as shown above.
Millivolt source mode
1. Select source mode with the ‘source/sink mode’ lockable switch.
2.
Select 0-20 mA (for 0-200 mV output)
o
r 4-20 mA range (for 40-200 mV output).
3. Set the ‘voltage/millivolt selectswitch to the 0-200 mV position.
4. Connect up the instrument as shown above.
You can use the Portacal 275 in this mode to accurately calibrate a
millivolt or thermocouple transmitter provided you measure the output
with a suitably accurate multimeter.
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