Time Electronics 1048 Voltage-Current-Loop Calibrator - Manual (Page 9)

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V1.2 30/12/10 P a g e | 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.
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Source Mode
Receiving instrument
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Source Mode
Receiving instrument
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