Time-electronics 1048 Voltage-Current-Loop Calibrator Manual de usuario descargar pdf (Pagina 9)

V1.2 30/12/10 Page | 9 1048 Technical Manual

3.5. Source – Voltage

The unit outputs voltage from 0 to 22V in three ranges, 0 to 0.22V (displayed in mV); 0 to

2.2V and, 0 to 22V.

Set function switch to SRC

Set OFF/V/mA switch to V

Set range switch to the desired range

Set output switch to NORM

Set multi-turn output control to minimum (anticlockwise)

Connect the unit to the process instrument

observing correct polarity and adjust the

multi-turn output control for coarse control and

INC and DEC buttons for fine control.

NOTE:

1) The maximum output current is limited to approx 50mA.

2) The units output resistance is approx 2.5 ohms. Therefore the user should be aware of the loading

implications - a load of 2.5K ohms will produce a 0.1% error in the output voltage. To maintain full

accuracy the maximum load should be restricted to 1.1K ohms.

3.6. Source – Current

The unit outputs current from 0-22mA in three selectable ranges, 0 to 0.22mA (displayed in

uA), 0 to 2.2mA and 0 to 22mA.

• Set function switch to SRC

• Set OFF/V/mA switch to mA

• Set range switch to the desired range

• Set output switch to NORM

• Set multi-turn output control to minimum (anticlockwise)

Connect the unit to the process instrument

observing correct polarity and adjust the

multi-turn output control for coarse control and

INC and DEC buttons for fine control.

Source Mode

Receiving instrument

Source Mode

Receiving instrument

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Time-electronics 1048 Voltage-Current-Loop Calibrator Manual de usuario Pagina 9