Click this link to download the manual: Spiral Sensor Manual. Here are some abbreviated instructions.
1. Lower the spiral sensor to the bottom of the casing. Note the cable depth.
2. Choose Read – Record. Choose an installation, and step through the installation parameters.
3. Set Sens Type to Spiral.
4. Set Start depth to the multiple of 5 feet or 1.5 meters nearest to the cable depth that you noted in step 1. (For example, if the cable depth is 159 feet, set the start depth to 160 feet.)
5. Set End depth to 5 feet or 1.5 meters.
6. Take the first reading without moving the sensor. (In our example, the DataMate displays a start depth of 160 feet, even though the sensor is actually at 159 feet. The reading will be labelled 160 feet. This difference in depth has very little, if any, effect on the reading.)
7. The DataMake displays the next depth. This time raise the sensor to the indicated depth. (In our example, example, the DataMate prompts 155 feet. Raise the sensor to 155 feet and record the reading.
8. Continue taking readings at the prompted depths, rotate the sensor 180 degrees for the second pass. Then take readings in the B0 groove and finally in the B180 groove.