ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 289)

Maintenance and Troubleshooting 8-5
EMUs do not support this diagnostic functionality.
However, IETG does provide an LED window on the
EMUX for monitoring activities occurring through the
ports on the EMUX, such as communications and data
transfer. Refer to Appendix D, Modbus/EMUX
Configuration and Diagnostics, for more information.
Viewing Monitor Activity Codes
Monitor activities, such as reading sensors or transmitting/receiving
messages, display on the LED automatically in the form of
individual characters. Each character represents a specific activity.
Appendix C provides a list of these characters and the activities to
which they correspond. The presence of a flashing light at the
lower right corner of the LED indicates whether the monitor is
involved in active communication. During active communication,
this light flashes slowly (approximately once every 1.5 seconds).
When the monitor is not engaged in active communication, the light
neither illuminates nor flashes.
Activating and Reading the Diagnostic Codes
The diagnostic information available through the LED corresponds
to power and wireless communication, such as signal strength,
battery voltage, and IP address. These codes are particularly useful
during site investigation and system installation to ensure an
adequate and consistent signal strength, test communications, and
verify the monitor IP address.
Accessing and activating the diagnostic codes require you to prompt
the GSM module with a small magnet (p/n 8000-0140). Activate
the diagnostic code sequence by holding the magnet against the
GSM module just to the left of the antenna jack (with LEDs
properly oriented) for 1 to 2 seconds and then removing the magnet
from the module. The sequence cannot begin until the magnet is
removed.