Time-electronics 1048 Voltage-Current-Loop Calibrator Manual do Utilizador descarregar pdf (Página 10)

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

3.7. Sink - transmitter simulator (TX SIM)

In the Sink function, the unit simulates a process field transmitter as part of a loop testing

and calibration operation. The unit takes its excitation power from the loop and acts as a

variable resistance to adjust the loop current to the value shown on the units display. The

excitation voltage must be in the range 3 to 50 volts dc.

The NORM/OFF/REV switch in not functional in the SINK mode.

• Set function switch to TX SIM

• Set OFF/V/mA switch to mA

• Set range switch to the 22 position

• Set output switch to NORM

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

Connect the unit in the loop

observing correct polarity. Set the

current in the loop by adjusting the

multi-turn control (coarse) and the

INC/DEC buttons (fine)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 22 23

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Time-electronics 1048 Voltage-Current-Loop Calibrator Manual do Utilizador Página 10