MS3500L Remote LPR Data Logger
The MS3500L is a battery-powered, intrinsically safe, remote data-logger capable of measuring and storing data from all types of linear polarization resistance (LPR) corrosion probes. The instrument is microprocessor-based and features a simple, menu-driven interface using a 2-key keypad and a 2-line LCD display.
Corrosion rate measurements are made using the linear polarization resistance technique. The instrument measures the current required to polarize the electrodes of a probe to a known potential. From the polarization potential and the measured current, polarization resistance can be calculated. Then, using Faradays law, the instantaneous corrosion rate can be calculated from polarization resistance.
The MS3500L incorporates a high-precision zero-resistance ammeter (ZRA) for measuring galvanic current between electrodes. It also offers a high-precision voltmeter for measuring the open-circuit potential between electrodes.
The MS3500L takes probe readings on a user-programmable logging interval. Readings are time and date stamped as they are taken, then stored to memory. Between readings, the instrument remains in a "sleep" mode to conserve main battery power. The instruments memory is capable of storing 3,000 readings and is protected by a lithium back-up battery.
Stored data can be uploaded to any IBM compatible PC as a comma-delimited ASCII text file. Because the data is in ASCII text format, it can be imported into any standard data analysis program such as Microsoft Excel, Lotus 123, or Corel Quattro Pro. Data can also be reviewed on the instruments LCD display for quick reference.
Stored data can also be uploaded to a Metal Samples model MS1500L Handheld ER Data Logger for transfer to a PC. This handy feature eliminates the need to remove the MS3500L from its site, or to bring a laptop PC to the site. This can be particularly useful when collecting data from multiple MS3500L Data Loggers. And since both the MS3500L and the MS1500L are intrinsically safe, data can be uploaded from the MS3500L to the MS1500L even in hazardous locations.
The MS3500L also offers an optional 4-20mA current loop output (model MS3510L). This feature allows data from the instrument to be fed directly to any industrial process computer that accepts analog inputs.
The instrument is housed in a NEMA-4 enclosure, and all external connections are weather-proof. This makes the MS3500L suitable for use in almost any indoor or outdoor environment.