The Chaparral Physics CP Data Logger/Interrupter is a versatile instrument designed to perform a variety of corrosion protection measurements and functions. These include instant off measurements with sacrificial anodes, operating as a full waveform GPS synchronized data logger for monitoring and correcting interference generated by stray and telluric currents, verifying rectifier interruption and synchronization, and providing GPS synchronized interruption for external relays and rectifiers.
It is configured using a simple GUI interface on a PC and the configuration data is saved to a USB thumb drive. That drive is then inserted into the data logger. When the logger is turned on, it reads the thumb drive and configures itself according to the saved file. This allows one corrosion engineer to insure that all data loggers on a project are properly configured and synchronized, eliminating measurement errors and reducing training costs.
| Data Acquisition | |
|---|---|
| Number of Inputs: | 3 inputs |
| Input Impedance: | 250 MΩ |
| Input Types: | Differential, Single Ended |
| Input Range: | Programmable range ±20 V or ±40 V |
| Resolution: | 0.6 mV |
| Common Mode Range: | 60V |
| Accuracy: | 0.5 % |
| Digitizer: | 16-bit SAR Architecture |
| Bandwidth: | 7.5 Hz |
| Dynamic Range: | 96 dB |
| Sample Rates: | 1000 samples per second |
| Acquisition Mode | |
|---|---|
| Manual: | Controller with start/stop switch |
| Auto: | Programmable Start and End Time |
| Data Storage | |
|---|---|
| Type: | Standard USB thumb drive (FAT16 or FAT32) |
| Recording Format | Binary data format exportable to three different file formats: comma-separated value (.CSV), native Microsoft Excel file (.XLS) or native Matlab data file (.MAT). |
| Timing | |
|---|---|
| Resolution: | 1 millisecond resolution time stamped data |
| Stability: | GPS locked |
| Interface | |
|---|---|
| Display: | 2.5x0.6 inches backlit and protected LCD with navigation buttons |
| LED status indicators for Power, GPS, Interrupt, and Errors |
| Power | |
|---|---|
| Internal Rechargeable Battery: | 18-hour life time |
| External power: | 12 VDC (10 to 15 VDC) capable of supplying at least 250 mA |
| Power Consumption: | <2.25 W |
| Physical | |
|---|---|
| Construction: | Weather tight enclosure |
| Size: | 7.5 x 8.8 x 3.9 in (190.5 x 223.5 x 99 mm) |
| Weight: | 3.3 lbs. (1.5 kg) |
| Ambient Operating Temperature: | 0 to 60˚C with 0 amp switching |
| External Relay Drive | |
|---|---|
| Drive Voltage | 12V open collector output |
| Maximum drive current: | 0.4 Amp |
| Minimum relay drive coil resistance: | 30Ω |
| Interrupt | |
|---|---|
| Bidirectional solid state switch | |
| Maximum switching current: | 10 amperes |
| Maximum on resistance: | .025Ω |
| Duty cycle: | 0% to 100% |
