OMICRON electronics

Regular service, inspection and calibration of measuring and testing devices have become an important aspect of quality assurance in general.

The Field Calibration Software cm_FCS allows OMICRON users and Calibration Laboratories to inspect and perform a calibration of the following test sets:

• CMC 256 (Standard and EP)
• CMC 156 (Standard and EP)
• CMC 151

For these test sets the Field Calibration Software cm_FCS contains a couple of ready made test templates. Once a self-test or a calibration is performed a calibration report is automatically generated. It should be noted that to perform a test the following accessories are necessary:

General

• CMLIB A including BNC-banana cable to connect low level outputs

For self test

• AC-Shunt, e.g. 200 mOhm, 21 Apk for measurement of current, other shunt values are possible (test templates have to be adopted)

For calibration

To measure the values below high-precision measurement devices and a calibrated shunt are necessary . High-precision sources are also needed for calibration of the DC measurement inputs.

• Voltage (0…300 VAC/DC measurements)
• Current (0…21 Apk AC/DC measurements)
• Phase
• THD
• Frequency
• Voltage (0...10 VDC source)
• Current (0...20 mADC source)

Reference measurement devices:

• Voltage: V, error < 200 ppm, e.g. 8.5 digits digital Multimeter Datron 1281 or HP 3458A
• Current: 200 mOhm, 21Apk, error <50 ppm, e.g. Tinsley 1682 bifilar winded oil shunt
• Phase: error<50 ppm, e.g. ClarkeHess 5500
• THD: 20 kHz bandwidth, error <50 ppm e.g. Keithley 2015
• Exact DC voltage and current source, error < 30 ppm

The voltage output of the CMC can be used as DC source (use source mode). To calibrate the 20 mA DC measurement input an external power source has to be used (error < 50 ppm).

The cm_FCS Field Calibration Software is part of the standard delivery of TU Software Version 2.0. The Software is also available as a stand-alone application for TU 1.4 to 1.6. The cm_FCS Software is available in English.