Campbell Scientific HydroSense II Support Software User Guide - Manual (Page 69)

Section 7. Error Codes
Try the following steps to rectify the issue:
Make sure the HydroSense II is powered on. Check that the
display is on and responsive. NOTE
Make sure that the HydroSense II is within range of the PC. The maximum
distance that the display can be situated away from the PC depends on the class
of the Bluetooth adapter used by the PC, as shown in
TABLE 7-1. Bluetooth
Transmission Distance (p. 7-5).
TABLE 7-1. Bluetooth Transmission Distance
Bluetooth Class Maximum Distance
Class 1 5 m
Class 2 10 m
Class 3 100 m
Press the Discover button in the software again and check that a Bluetooth
symbol is shown next to the device serial number.
If a folder icon is shown instead, the software did not detect the device during
the discovery process. Restart the PC software and the HydroSense II and then
attempt another discovery.
If the device is still not discovered by the software, or if the device is being
discovered but cannot establish a connection, please report the issue to
Campbell Scientific.
7-5