iET PRS-300 Series, Руководство по эксплуатации, Страница: 12 / 50

INTRODUCTION
PRS-300 Series
2
offers a wide choice of ranges, power, voltage,
and accuracies for a wide variety of design and
production applications.
The PRS-300 uses a microcontroller design
to enhance the ease of use and calibration. It
provides direct resistance substitution as well
as RTD (Resistance Temperature Detector)
simulation. It allows for higher precision and
tighter tolerances.
The PRS-300 is a precision resistance source
with excellent characteristics of accuracy, sta-
bility, temperature coef
fi cient, and power coef-
fi cient. It is direct reading without the need to
subtract “zero resistance.”
The PRS-300 offers the option of true 4-wire
Kelvin measurement for calibration applica-
tions and 2-wire mode for use in series as a
substitute resistor and for RTD applications.
The front panel display indicates the mode
selected: 2-wire or 4-wire.
There are two pre-programmed RTD resistance
tables, and others may be added by the user.
The controller allows for other convenient pro-
grammed features.
The unique design makes adjustment of the
PRS-300 for calibration semiautomatic. An
internal calibration routine guides the user to
perform measurements using
only a precision
ohmmeter and enter the measured values into
the PRS-300. No other standards are required.
IET Labs offers the PRS-DMM Self
Adjusting Software which works with the PRS-
300 and Fluke 8508A or Keysight 3458A to
automate this adjustment process and eliminate
the need for a technician to manual enter the
resistance values manually into the PRS-300