Intelligent Test Stake Product Description:
The intelligent test stake data collection allows for adjustable wiring methods and can display battery voltage, with the default voltage shown on the controller display screen;
Monitoring Mode
a) Timed Measurement: Features a remotely configurable measurement cycle, with fast mode recording data every 1 minute and slow mode recording data every 1 day. Data upload completeness rate >95%;
Wireless Data Communication
a) Communication Method: 4G wireless communication, communication protocol TCP/IP, or NB-IoT
b) Communication Range: Areas covered by wireless networks with signal strength meeting communication requirements.
c) Communication Antenna: Built-in communication antenna with antenna gain ≥3dB.
Data Logger Power Consumption
a) Standby Mode Battery Output Current ≤20μA;
b) Communication Mode Battery Output Current ≤500mA;
Power Supply
a) Solar + Rechargeable Battery: ≥8Ah
b) Battery is easy to replace;
c) When using solar + rechargeable battery power supply, it can operate for over 5 days without sunlight when collecting data every 10 minutes. Under frequent data collection, the rechargeable battery lifespan is no less than 3 years.
Supporting Software
a) Provides functions such as map browsing, data query, alarm analysis, data statistics, historical curves, and real-time curves.
Remote Control Function
Remote control allows configuration of the data logger's installation records, collection time, collection frequency, and trigger alarm thresholds.
Alarm Function
The test stake consists of inner and outer galvanized pipes, test wires, and test connectors. Test connectors are available in three types: six, eight, or ten connectors, and can be customized according to user requirements. Test stakes are available in two full heights: 3 meters or 2 meters, with a diameter of 0.1 meters.
Cathodic protection test devices should be installed simultaneously with the cathodic protection system. Test devices should be deployed along the pipeline route, with intervals between adjacent test devices preferably not exceeding 3 km. In urban or industrial areas, intervals should not exceed 1 km; in areas affected by stray current interference, test devices may be appropriately densified. Test devices should be installed above the pipeline and marked. Intelligent test stakes should monitor the following parameters: pipe-to-soil DC potential, coupon off-potential, coupon current; AC voltage, AC current. The area of the DC potential coupon should be 6.5–10 cm2, and the area of the AC coupon should be 1.0 cm2.
For station-area cathodic protection, installing test stakes is not recommended. Instead, reference tubes should be buried at locations where pipe-to-soil potential measurements are needed to facilitate the placement of portable reference electrodes. Any above-ground metal can serve as a contact point for the red probe during measurements. Since pipelines within the entire station are interconnected and form an equipotential body, connecting to any station structure at any location will not affect potential readings.
(1) Test devices should be installed at the following locations:
① Insulating joint locations;
② Metal casing locations;
③ Coupon and drainage grounding device connection points;
④ Auxiliary anode locations, sacrificial anode installation points;
⑤ Pipeline directional drilling crossing points.
(2) Intelligent test stakes should be installed at the following locations:
① Pipeline feature discontinuities (elbows, high-voltage line phase changes, turning points);
② Locations with low soil resistivity;
③ Cathodic protection station drainage points, midpoints of cathodic protection stations;
④ Locations with DC interference.
(3) Other considerations:
① Install potential coupons along the pipeline every 5–10 km;
② When metal casings have high-quality coatings, leave 2 m of exposed sections at both ends of the casing;
③ Ensure electrical continuity between valve room instruments and the valve body, with the valve body connected to the ground grid via lightning arresters or DC decouplers;
④ Install surge protection devices at all electrical isolation points.