Xylem YSI Storm 3, Руководство по началу работы

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Getting To Know Storm 3
Digital I/O
The Digital I/O connections can be configured independently as inputs or outputs. In input mode,
the signal has an internal pull up resistor of 47K Ohms. This allows a switch closure to ground to
activate the input. It can also be driven using normal 5 volt logic levels. Each port can also be set
up as a counter input for applications such as a tipping bucket rain gauge. As an output, a100-Ohm
protection resistor limits the drive capability. The output will still be about 4.0 volts with a load of
10.0mA or less.
SDI-12
The SDI-12 port operates as a “Master”, is V1.3 compliant and compatible with standard SDI-12
sensors. SDI-12 sensors have a minimum of three wires, which are +12V, Data, and Ground. If
connecting several SDI-12 sensors to the system, then an external bussed terminal strip may be
helpful. The +12Vout excitation grouped with the SDI-12 connections is active any time power is
applied to the unit. It cannot be turned off. There are two internally connected ground connections
for convenience, as some sensors have both a ground and a shield wire. In some cases, the shield
wire from the sensor should be connected to the case shield connection point provided.
Power Connection
The Power input uses a separate 2 position connector so the power can be disconnected
individually.
USB
Two USB-A connectors and one mini-B are provided, allowing direct connection to an external
device such as a Wi-Fi adaptor, laptop, tablet, or USB flash drive. USB flash drives can be used to
download data, save or load configuration files, and load firmware updates.
Ground Lug
Proper shield or earth grounding should be used to protect the equipment from exposure to ESD
and other induced interference.
Wi-Fi Button
The Wi-Fi button can be gently pressed to activate the Wi-Fi signal (this is a capacitive button and
therefore may not work if using gloves). The USB Wi-Fi adaptor must be plugged into one of the
USB Host ports for the Wi-Fi button to work properly. The Active LED will turn on for a couple of
seconds when the button is successfully pressed. Wi-Fi adaptors power off automatically after three
minutes of inactivity.
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