Want a Mooshimeter Multimeter?

This is Mooshimeter. A wireless multimeter and data logger that outputs results to your smartphone.

Why would you want it? It lets you test and measure stuff from a distance — very useful for cases where the device under test is not the safest thing to be in touch with. The Mooshimeter comes with a rugged construction so that it too survives the experience.

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In cases where you want to record and collect data for an extended period of time, the Mooshimeter also allows you to add a removable microSD card that can save data for up to six months!

It features true 2-channel simultaneous sampling and a 600v 10A rating that allows for detailed diagnosis of AC systems. It allows you to evaluate harmonic distortion and power factor easily.

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Specs:

Voltage

• Up to 600V, DC or peak AC
• Up to 420VAC RMS sinusoidal
• Better than 0.5% accuracy DC
• Better than 1.0% accuracy AC for harmonic content below 1kHz
• >10 Megaohm input impedance

High Precision Voltage:

• Up to 100mV with <15nV per count resolution
• Up to 1.2V with <200nV per count resolution
• >10 Megaohm input impedance

Current, Internal

• Up to 10 Amps
• 20 µV / mA burden voltage (using factory fuse)
• Less than 5 µA per count in 10 Amp scale
• Better than 1% accuracy

Resistance

• Better than 1% accuracy over 20 Ohms –  20 Megaohms

Frequency

• Better than 1% accuracy up to 1kHz

Diodes

• Up to 1V @ 100nA

Sampling

• 8kHz dual simultaneous sampling
• 4kHz analog bandwidth for most measurements
• 24-bit resolution max
• >18 Effective bits at 125 samples per second

On Board Storage – SD Card

• MicroSD Card
• Up to 32GB
  • More than a week of constant logging two channels at 8kHz
• SD or SDHC (not SDXC)

Radio:

Protocol: Bluetooth Low Energy

GATT Profile: To be released in 2014

Wireless Range

The wireless range has been tested empirically through the following media to an iPhone 5.

• 50m air, line of sight
• 5cm of refrigerator, door closed
• 1m of 2006 Honda Civic – Engine compartment to the passenger seat
• 10m air + safety shield of a Tesla Coil rock-bands testing facility

Applications

Power

Simultaneous high-speed sampling of voltage and current gives the following power measurements:

• True Power
• Reactive, Complex, Apparent Power
• Power Factor
• Total Harmonic Distortion
• Phase Lead or Lag

Impedance

Measure the supply sag under load to estimate:

• Supply or Battery equivalent resistance
• Battery State of Health

Current Measurement, External Shunt

• Measure thousands of amps with sub-milliohm shunts
• Measure precision currents with large shunts
• Use the existing wiring for “quick’n’dirty” measurements
  • Use 1′ of 10AWG for 12µA per count resolution, up to several times the wires ampacity.

Temperature

• External Thermistors
  • Steinhart-Hart or Beta parameterized
• External Thermocouples
• Internal ambient temperature sensor
• Internal temperature sensor for temperature drift compensation