Digital Resistance Meter

Features

No need to select ranges or adjust dials – the Miller 400D provides a direct read-out of resistance with the push of a button
Bluetooth interface allows optional data-logging via a Bluetooth-enabled PC (or PDA)**
Rugged, hard plastic case - safe to use on wet ground – IP67 rating for dust and water intrusion
High resolution digital display
Resistance measurements are unaffected by any stray interference signals that may be present in the earth during readings, due to the use of narrow band-pass filters centered at 82.2Hz (the unit’s operating frequency)
Runs on a set of replaceable D-cell alkaline batteries...no need to periodically recharge the unit or to plug it into a power source
Performs 10,000 single readings on a fresh set of batteries
In accordance with the ASTM G57-06 Standard test method.

Specifications

Resistance measurement range from 0.01Ω to 10MΩ (auto-ranging)
Accuracy:
0.01Ω to 1MΩ range: ±1.6% ±1LS Display Digit ±0.01Ω
1MΩ to 10MΩ range*: ±5% ±1LS Display Digit
Storage temperature range (with batteries installed): -40°C to 50°C (-40°F to 122°F)
Operating temperature range: -20°C to 54°C (-4°F to 129°F)
Dimensions: 12 W x 10.5 L x 5.75 H (30.5cm x 26.7cm x 14.6cm)
Weight: 8.6 lbs (3.9kg)

Software Features and Benefits

Errors associated with writing down resistance meter readings and subsequently calculating soil resistivity values based on pin spacings are eliminated using the ProCP Soil Resistivity program in conjunction with the Miller 400D Resistance Meter.
M. C. Miller’s ProCP Soil Resistivity application can be run on “off-the-shelf” PocketPC hardware (Windows Mobile 5.0 or higher) or on a laptop PC. Hardware must be Bluetooth-enabled.
Reading locations are represented by user-entered station numbers and readings are automatically position and data/time stamped in cases where a GPS receiver is integrated with the user’s handheld unit.
Data can be stored for up to 4 electrode (pin) spacings per reading location.Pin spacing values are user-entered in “feet” or in “meters”.
Resistance data directly acquired from the Miller 400D are converted to soil resistivity values (expressed in ohm.cm units) for each selected pin spacing value. Measured resistance and calculated resistivity values are both stored per reading.
Survey data are stored in XML files for easy reading by other applications, including ProActive, M. C. Miller’s Pipeline Integrity Data Management application. ProActive users are able to easily integrate soil resistivity survey data with other “over-the-pipe” survey data for enhanced data analysis. A conversion to XLS file format (Excel Spreadsheet) option is also included.

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