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Once a day, the MONITOR will write an event to the log indicating that it has GPS
problems.
The MONITOR reporting
“No GPS Detected”
can indicate that the connector between
the GPS and MONITOR is bad (please refer to the section on the connector on page 66)
or that the MONITOR does not have its jumpers set properly (please see the section on
page 66 about Jumpers)
If the
GPS cannot get a time fix
, please see the section on GPS Positioning on page 65.
If the MONITOR reports “
GPS Comm Failure”,
it means the MONITOR is detecting
data on the RS232 line, but that the data is incomprehensible. It could indicate that the
GPS has been improperly configured. If possible, try using a different GPS module.
If a faulty GPS is connect to the MONITOR, of it the GSP is not connected to the
MONITOR, the MONITOR will take a full minute before deciding it cannot talk to the
GPS. Ensure that the MONITOR is given enough time to talk to the GPS before leaving
the station.
Jumpers
There is a jumper inside the MONITOR that ensures that the MONITOR provides 12
Volts on RS232 which the Garmin GPS requires in order to function.
If the MONITOR
is reporting “No GPS Detected”
, it may be the case that the jumper is not properly
setup.
To setup the jumper, the case must be opened. Once the case is open, the jumper is easily
accessible. The Jumper in question is J19, and is located next to the RS232 connector.
Place a connector on jumper J19 so that it connects 12v to the middle pin (pins 1 and 2)
In addition to J19, there is another jumper needs to be properly configured in order for
the unit to provide power to the GPS. However, this jumper is properly setup at the
factory and it is unlikely to be the cause of the problem. The jumper in question is J16
(located next to J19). It should have a connector across pins 2 and 3 or have no
connector at all.
RJ45 to RS232 Connector
A custom connector is required to get the Sutron and the Garmin GPS together. The
connector bridges the RJ45 on the Garmin GPS to the RS232 on the Sutron unit. The
table below provides the wiring diagram for the connector.
Note: The colors on the Garmin GPS RJ45
do not match
the colors of the RJ45 to
RS232 converter.
Rj45 pin RJ45 to Rs232
RS232 on
Function
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