Instruments used in Calibration
Temperature Calibrator Milli Volt Source
This is a Milli-Volt and Milli-Amp Source for
Calibration of Temperature Measurement and Control
Instruments using Thermocouples. There is also a
Passive Variable Resistance Source for Simulating a
PT-100 RTD Sensor.
Building a mV Milli-Volt Calibrator Source
This calibrator was a simple solution i built.
This instrument itself was calibrated by
Instruments like the Calibrators from Omega which
are the best you can get. Most instruments
calibration drifts or changes over a year or two.
It is important to recalibrate it and also keep it
in a clean, dust free lab. Things like sunlight
and high humidity can affect measurements. Power
tools and machines nearby can cause EMI-RFI
Points and Pilot Production
Millivolt Source with Digital Potentiometer
Here is a Millivolt Source i built for Calibration
in the early days. It uses only CMOS Digital and
Mixed Chips from Intersil and CD40xx Series.
Simple Millivolt Source for Calibration
Later i tried a unit with 8748 part of the code in
my uC section. This is with Ramp-up and Ramp-down
using only two buttons. This works even now, The
support below is an HRC Fuse Holder made of Phenolic
or Epoxy Resin. The mV Terminations are on Top.
Milliamp Source - Field Calibration Current Loop
You will learn more if you make your own tools
and instruments and use it alongside the
professional tools you buy. Some Jigs and Fixtures
are custom developed even today for testing and
troubleshooting. Building your own equipment will
keep your skills updated and lubricated.