A multitude of functions allow for
use of the highly flexible instrument in process engineering
applications, the equipping of control rooms, device manufacturing,
general measuring technology
and a wide variety of other areas. As an integral element of a
calibration system, it serves to calibrate measuring transducers,
instrument transformers, insulation amplifiers, transmitters,
temperature
meters, recorders, controllers, signalling devices and display
instruments.
With a BD232 or USB-HIT plug-in interface adapter calibration
sequences and complete, measuring
point specific calibration cycles can be uploaded to a PC, and can
be stored and queried via the keyboard. This substantially shortens
set-up at the calibrator and prevents the selection of
incorrect settings.
METRAwin90 software, (included with the CP1 package, check
Order Information) simplifies programming, controls the transmission
of data to the calibrator, logs measurement data provided by
a multimeter (if used) from the output of a measuring transducer or
an instrument transformer, and compares set points and actual
values. The recorded values can be printed out from a PC as a
calibration report.
Universal Calibration Source
Integrated electronics generate mV, V and mA signals. Beyond this,
the electronics are capable of simulating thermovoltages for various
types of thermocouples for predefined
temperatures (°C
or °F), as well as for Pt and Ni temperature sensors.
Frequency and Pulse Generator
Continuous frequency signals can be generated by the METRAHIT28C
Light for testing PLCs, energy metering devices, flow rates and
more. Amplitude is adjustable for the generated square wave
pulses, which are used to simulate sensor pulses. Predefined pulse
runs are also generated at a chosen frequency.
Calibration and Simulation
Measuring transducers with a wide variety of input signals (voltage,
thermovoltage, RTD and 2-wire resistance sensors etc.) can be
directly connected and calibrated. If a multimeter is used
(e.g.METRAHIT 26S), respective values can be measured at the
measuring transducer’s output,
transmitted to a PC via an adapter if desired, displayed with the
help of METRAwin90 software and
compared with the appropriate calibration specifications. Setpoint
values and actual values are displayed, or printed as a certificate.
When operated in the “mA sink” mode, the METRAHIT 28C Light
simulates a 2-wire transmitter and pulls the selected current value
from the device under test.
