2 mounting in an enclosure, 3 grounding, 4 wiring – Campbell Scientific AL200 ALERT2 Encoder, Modulator, and Sensor Interface User Manual
Page 20: Operation, Mounting in an enclosure, Grounding, Wiring
AL200 ALERT2 Encoder, Modulator, and Sensor Interface
•
Set the
GPS Power On Interval – (30) – This is how often the GPS
receiver will be powered on and an attempt to get a GPS fix will be
made. Value is expressed in minutes.
•
Set the
GPS On Max – (5) – This is the maximum amount of time, in
minutes, that the GPS receiver will be powered on without a GPS fix
being obtained.
Sensor Input Settings
These settings have no effect in datalogger peripheral mode.
Sensor Data Monitoring
These values are not updated when the AL200 is configured as a datalogger
peripheral.
After configuring the AL200 settings, click the
Apply button at the bottom of
the screen to send the changes to the device. It is a good idea to save the
configuration file for later reference.
7.2 Mounting in an Enclosure
When used in outdoor applications, the AL200 should be installed in a
desiccated, weatherproof enclosure. The AL200 can either be flat- or edge-
mounted to a panel using the supplied plastic grommets and 6-32 screws.
7.3 Grounding
The ground lug should be connected to a good earth ground using 12 AWG
stranded wire. This will help protect the AL200 from electrical surges and
provide a good reference for analog measurements.
7.4 Wiring
Connect the transmit, power, and ground lines (Push to Talk and Frequency
Select lines are optional) from your analog radio to the SW12V, Tx and G
terminals of the radio connector. The AL200 should be mounted as close as
possible to the radio in order to avoid long cable runs between the two devices.
Connect the sensor leads to the appropriate sensor inputs. Depending on site
conditions, additional surge protection for the sensor cables may be required.
If using the AL200 as a datalogger peripheral, connect either the CS I/O or RS-
232 port to the datalogger using the supplied SC12 cable.
8. Operation
The AL200 uses the ALERT2 protocol as developed by the ALERT2
Technical Working Group (TWG) and is designed for use as an ALERT2
transmitter or ALERT to ALERT2 concentrator and repeater. For more
information on the ALERT2 protocol, visit the National Hydrologic Warning
Council’s website:
14