ERT-A2 ALERT2 Configuration Manual
Revision 1.0
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consumption, so is best to keep the value large. Default value
and maximum value is 600 seconds (10 minutes).
e) ALERT2 Quick Setup
For flood warning applications this is a quick setup for rain,
river and battery sensors to match with Bureau of
Meteorology guidelines.
f) ALERT (version 1) I/O
Quick Setup
Quick setup for legacy ALERT protocol systems. Note: Also
select ALERT protocol in communications menu.
g) Restore Default
Configuration
Reset unit back to default configuration. Restore default
configuration can also be performed by brief press of reset
and then holding down the internal test button for 5 seconds.
Quick setup ALERT2
This will setup the basic sensors required for a simple flood application gauging site based on using
4-20mA analog input 1 for river level or stage, rain gauge input on DIO 3, Battery voltage and radio
received signal strength. Each of these sensors will use the default ALERT2 sensor ID (refer to Inputs
Configuration section for sensor ID table).
It is often quicker to always start from this this quick setup for ALERT2 applications and then use I/O
setup menu option to tailor sensor setting for the installation.
Quick Setup ALERT (Version 1)
If ALERT (Version1) or ALERT1 legacy protocol is used in the application, then select this menu item
to setup the normal default sensor required for a standard gauging site.
ALERT quick setup will configure the following sensors:
Sensor
Input
ID
Tipping bucket rain gauge
DIO 3
0
River Height
AI 1
1
Battery
Internal/External Battery Vdc
2
When ALERT1 mode is selected in the communications menu the ERTA2 will use the station address
plus the sensor ID to form the ALERT sensor ID. See communications configuration for more detail.
Communications Configuration
The ERTA2 unit has two communications channels that can be configured for the transport of sensor
data messages, designated: primary and secondary communications. In most applications only the
primary communications channel is used and secondary communications can be used as a
redundant backup channel in the advent of a primary communications failure or unavailability.
Integrated Radio Communications Configuration
ERTA2 units that shipped with either VHF (148-174MHz) or UHF (340
–
960MHz) radio will use this
configuration option to setup the primary communications channel.
VHF radios also can have the option of a 25W power booster which is fitted to the enclosure door
and when fitted excludes the use of internal secondary communications. The secondary
communications for 25W VHF units does require the use of a second outdoor enclosure kit. See
your supplier for details.
Configuration of frequency and radio RF power should be done as per your licence conditions with
step sizes to 1Hz. The ERTA2 unit only supports channel spacing of 12.5kHz.
