Electronics and Software
Engineering Innovation

BMeasure-125i - Accessories

BNC Amplifier Input bmio-bnc

Front end amplifier

The BMeasure-125i has been developed to interface to a wide range of sensors. In some cases some form of preconditioning or amplification may be desired. The schematic show an amplification front end. This has been implemented as a small PCB that plugs into a BMeasure-125i input channel. The user can populate the PCB with component values to provide the gain and filtering required for a particular application.

Schematic of Front end amplifier

BNC Passive Input bmio-opamp

Front end amplifier

This accessory enables a user to connect via a BNC style connector and configure AC/DC coupling and attenuation by fitting the appropraite components to the PCB supplied. As well as a passiveconnection, the board supports a constant current source for the connection of IEPE style sensors.

Schematic of Front end amplifier

BNC Passive Input bmio-attentuator

bmio-calibrate

This accessory proves a 5x input attenuation to allow the BMeasure-125i to measure in a +-60 Volt range.

Schematic of Front end amplifier

Calibration module bmio-calibrate

bmio-calibrate

This accessory enables a user to accurately calibrate a BMeasure-125i. The unit provides a 2.5 Volt accurate reference voltage for this purpose. The exact voltage is printed on the unit.

Main voltage input module bmio-mainsvoltage

bmio-calibrate

This accessory is designed for use in energy monitoring applications. It provides an isolated interface to a 240V 50/60 Hz line phase. This allows the line voltage to be accurately measured, both amplitude and phase, for accurate power measurements in conjunction with current transformers connected to other BMeasure inputs.