Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 14
This line will output a voltage during the warmup for the following measurement
types: analog, SDI-12, and digital. It will also always turn on when an analog
measurement is made.
This line will output whatever voltage is powering X-Link on the battery terminal.
1.7.8.3.
VREF
Terminal #19 outputs a 2.5 V reference during the warmup for an analog sensor
and when an analog measurement is made.
1.8.
Wakeup Button
X-Link models manufactured in 2013 or later have a wakeup button on the top
right side of the box.
Pushing the button will have X-Link turn on its Wi-Fi chip and modem. When
visiting a field station, push the button, then use your mobile phone or tablet to
connect to X-Link via Wi-Fi.
When the button is pushed, the green LED will light up for a few seconds,
indicating that Wi-Fi is now on.
If the button is held down for 5 seconds, the red LED will come on too. Keep
holding the button until the red LED turns off in order to reboot X-Link.
