Brochure/Catalogue

K.16 2729490000

Accessories

Calibrators

Portacal 275

Hand-held signal source and loop calibrator

The Portacal 275 is a precise hand-held signal source for

current and voltage signals. It can be used in four modes

which allows the calibration of standard current/voltage

transmitters.

The operating mode “voltage source“ simulates auxiliary-

powered transmitters with proportional voltage outputs.

The mode “current source“ allows emulation of transmitters

with proportional current outputs. The “mv source“ mode

simulates a variety of other analogue signals from many

different applications. The “current sink“ mode simulates the

outputs of a two-wire (loop powered) transmitter.

The Portacal 275 is equipped with a scalable potentiometer

(0 to 100 %) that can be adjusted in steps to an accuracy

of 0.1 %. Together with the output-range switch, the

potentiometer allows for a quick and precise adjustment

of the signal value. A typical accuracy of ± 0.25 % is

possible. An integrated test point, for connecting external

measurement devices, allows for a higher accuracy

of ± 0.1 %.

Technical features:

• Light and portable device

• Simulates loop-powered transmitter operation

• LED for indication of source/sink operating mode

• Current ranges: 0 to 20 mA / 4 to 20 mA / Voltage

ranges: 0 to 5 V / 1 to 5 V / 0 to 200 mV

• 0.1 % accurate current source

• Test points for current output monitoring

• Switch select 0 %, 100 % or variable output

• Signal outputs can be adjusted with spindle

potentiometer for high accuracy

• Powered from two 9 V block batteries