Automated Data Capture for Digital Multimeters Without Remote Interfaces
Domini Technologies develops automation solutions that allow calibration laboratories to capture measurement data from instruments that do not support remote communication interfaces.
Many older or legacy digital multimeters used in calibration laboratories do not provide GPIB, LAN, or USB interfaces for automated data acquisition. As a result, technicians must manually record measurement values from the instrument display during verification procedures.
This process can slow verification workflows and introduce opportunities for transcription errors.
Automation using machine vision and USB camera capture provides an alternative method for collecting measurement results directly from the instrument display.
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Automation Approach
The system uses a USB camera positioned to view the digital multimeter display during testing.
Custom software processes the captured image to identify and extract the displayed measurement value. The value can then be recorded automatically as part of the verification workflow.
This allows the measurement to be incorporated into an automated test sequence even when the instrument itself does not provide a remote interface.
Typical workflow:
- Measurement stimulus is applied to the device under test.
- The digital multimeter measures the resulting signal.
- A USB camera captures the instrument display.
- Image processing software extracts the displayed value.
- The measurement result is recorded automatically.
Advantages of Display Capture Automation
This approach allows laboratories to automate verification procedures using instruments that would otherwise require manual data recording.
Benefits may include:
- elimination of manual data entry
- reduced transcription errors
- faster verification procedures
- automation of legacy instruments without remote interfaces
- integration with automated test workflows
Applications in Calibration Laboratories
Display capture automation can be useful in environments where older or specialized instruments are still used in calibration procedures.
Typical applications include:
- digital multimeter verification workflows
- legacy instrument automation
- calibration procedures requiring manual measurement recording
- automated test systems integrating mixed instrument capabilities
Integration With Test Automation
Display capture systems can be integrated with broader test automation software that controls other programmable instruments.
For example, a verification workflow may combine:
- a programmable signal source
- an automated switching system
- a digital multimeter monitored through camera capture
This approach allows laboratories to automate complex test procedures even when some instruments lack remote communication capability.
Custom Automation Development
Domini Technologies develops automation solutions tailored to the instruments and workflows used in calibration laboratories and engineering test environments.
Projects may include:
- automated calibration verification workflows
- adjustment procedure automation
- RF and microwave measurement automation
- machine vision data capture for legacy instruments
Automation systems are designed to integrate with existing laboratory equipment while improving measurement workflow efficiency.
Integration with PayPerCal Automation Platform
The Digital Multimeter Display Capture module is available as part of the PayPerCal automation platform.
PayPerCal provides automated verification procedures for many commonly used calibration instruments. The display capture module expands automation capability by allowing measurement data to be captured from instruments that do not support remote communication.
This enables PayPerCal procedures to incorporate legacy instruments into automated verification workflows.
For more information about this automation solution, including supported procedures and system requirements, see the product page:
Digital Multimeter Automation Software →
Discuss an Automation Project
If your laboratory performs repetitive verification procedures that require manual measurement recording, automation may help reduce technician workload and improve consistency.
Domini Technologies works with calibration laboratories and engineering teams to develop automation solutions tailored to their equipment and procedures.