Handling Commissioning - VOLTCRAFT CC-421 Notice D'emploi

Handling Commissioning

The current calibrator can be operated by only three sliding switches
and a helipot. By using the switches, the current range is adapted,
the function set and the device is switched on and off. Via the poten-
tiometer the current value of the current source is adjusted or the
voltage value of the voltage source.
A "FUNCTION"
- If the switch is set to "mA MEASURE", the current calibrator is
applied as mA meter. DC currents up to 20 (19.99) mA with two
decimal positions and up to 24 (24.0) mA with one decimal positi-
on can be measured and indicated.
- If the switch is set to "Power/mA MEASURE", loop current mea-
surements of two-conductor loops with their own supply can be
performed. Here, the current calibrator supplies a DC voltage of
12 V and determines the current in the loop up to 24.0 mA max.
- If the switch is set to "CURRENT SOURCE", the current calibrator
serves as current source in order to calibrate other measuring
devices connected in the mA test range.
- If the switch is set to "VOLTAGE SOURCE", the current calibrator
is used as voltage source. The device supplies then an adjustable
DC current in the range of –199.9 mV up to +199.9 mV. Thus it
enables the calibration of mV ranges (see panel meter).
B "RANGE"
This switch changes the current range of the current source or the
test range for DC current measurements. Two ranges are available:
up to 19.99 mA (two decimal positions) and up to 24 mA (one deci-
mal position).
C "POWER"
This switch turns the current calibrator on and off. After a short
initialization period, the device is ready for use.
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