TMJ-I Area Measuring Instrument User Manual Source: Hangzhou Top Instrument
1. Startup:
Turn on the power switch, and the initial screen in scan mode will appear, displaying information such as "GPS Area Measuring Instrument," "Top Instrument," and "Searching Satellite..." At the same time, the numbers in the upper left corner will gradually increase from 01 to 99, indicating that the device is searching for satellite signals. This process may take a few minutes.
2. Measurement Interface:
Once the satellite signal is successfully acquired (this may take several minutes), you will see the measurement interface with the following details:
"Ready" – indicates the instrument is ready for use;
"000" – number of recorded data points;
"12:18" – current time;
"ZD" – automatic mode, "08" – 8 visible satellites;
"Longitude 12011.500158" – the longitude of the location is 120 degrees 11.500158 minutes;
"Latitude 3016.208038" – the latitude of the location is 30 degrees 16.208038 minutes.
3. Automatic Area Measurement:
After entering the measurement interface, press the “Start†key to begin. The default mode is “Auto,†and the LCD will show “ZD.â€
Hold the measuring instrument flat, align the red “hawk icon†on the left with the edge of the area being measured, then press the “Start†button to start. The display will show:
Measuring 001
Longitude 12011.500158
Latitude 3016.208038
12:18
ZD08
Walk around the area, and the device will automatically record the data. When you return to the starting point, press the “Area†button to view the results:
01 average 22.18 acres
22.18 acres
14786 m²
If you press the “Back†button and then the “Start†button again, you can repeat the process. Upon returning to the starting point, pressing “Area†will show the average of the two measurements:
02 times average 22.18 acres
22.18 acres
14786 m²
To clear previous records, press the “SET†button when the result is displayed. Note that historical data affects the average. Press “Back†to return to the measurement screen for the next use.
4. Manual Area Measurement:
If there are obstacles like buildings, bridges, tunnels, or large trees that block satellite signals, manual measurement is required. In this case, place measurement points along the boundary of the area. The more points you collect, the more accurate the result.
In the “Ready†state, press the “Set†key to switch to manual mode. The “ZD†in the top right will change to “SD.†Press “Start†to begin, then press “Save†to store each point. Repeat until all points are saved, then press “Area†to calculate the total area.
5. Distance Measurement:
After turning on the device and entering the measurement interface, press “Start†at the beginning point, move to the end point, and press “Distance†to get the distance between the two points. Press “Back†to return to the main screen for further measurements.
6. Notes:
1) For larger farmlands, if more than 5 satellites are detected, the accuracy improves.
2) Avoid direct sunlight on the LCD screen to prevent unclear display.
3) If there are sections without satellite signal while walking along the edge, automatic measurement cannot be used. In such cases, switch to manual mode.
7. Technical Specifications:
1) Area Measurement Range: 0–9,999,999 m² or 0–999,999.9 mu
2) Area Measurement Accuracy: 5% (<2 mu), 3% (<10 mu), 2% (<50 mu), 1% (>100 mu)
3) Distance Measurement Range: 0–999,999.9 meters
4) Distance Measurement Accuracy: ±2.5 meters
5) Operating Conditions: Temperature -10°C to 50°C, Humidity 5% to 95%
6) Power Supply: 6V, 4 x 5# Alkaline Batteries
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