Campbell Scientific TX320 Transmitter - Manual (Page 47)

TX320 Transmitter
Error code 18 (0x12), message abort due to power supply, indicates the
transmitter power supply did not provide enough voltage. Check system
battery. If the system battery is low, the RF power supply will not be able to
operate properly. Device Configuration Utility displays the supply voltage in
Settings Editor | Status (see FIGURE 8-1). The loaded battery voltage must
not drop below 10.8 volts.
Error code 19 (0x13), software error, indicates the transmitter was not able to
run its internal software.
Error code 20 (0x14) is the fail-safe error. The fail-safe is an internal hardware
circuit that will shut down the TX320 if it transmits too frequently or for too
long. The fail-safe error code is not logged until the transmitter tries to
transmit after the fail-safe has been tripped. The transmitter only trips the fail-
safe when a serious hardware failure has occurred. Fail-safe limits are different
for different baud rates. At 1200 bps, transmission cannot exceed 105 seconds
or repeat more often than every 30 seconds. At 300 baud, transmission cannot
exceed 270 seconds or repeat more often than every 30 seconds. The fail-safe
can be reset by pressing and holding the reset switch for 10 seconds.
Error code 21 (0x15) indicates the transmitter missed a GPS fix, but does not
guarantee a missed a transmission. Go to Settings Editor | GPS in Device
Configuration Utility and ensure that the GPS Fix Interval setting does not
coincide with the self-timed transmission interval. The GPS fix event must
occur at least two minutes on either side of a self-timed transmission. Click the
Apply button after making changes to the setting. See Section 7.4, GPS
Antenna, for additional GPS antenna information.
Error code 22 (0x16) indicates a Standing Wave Ratio (SWR) Fault. The SWR
fault can be triggered by several different conditions. High reflected power
will trigger the SWR fault. Reflected power is caused by poor transmission
antenna and/or antenna cable condition or wrong type of antenna or antenna
cable. See Section 7, Installation, for transmission antenna information. Ice
buildup on an antenna can change the antenna properties, which can cause
excessive reflected power. Corrosion in connectors, water in antenna cables,
metal in close proximity to the antenna, and a damaged antenna can also cause
excessive reflected power.
The SWR fault can also be triggered by a low battery. If the transmitter cannot
generate enough transmission power, the SWR fault will trip. Always check
the system battery if there has been an SWR fault. This condition is indicated
by low reflected power.
To determine if the reflected power is too high or low, read the last message
status information. When the reflected power number is divided by the
forward power number, the result should be 0.5, with limits of 0.4 to 0.6. See
Section 7.5.2.3, GoesStatus Read Last Message Status, for details on the Last
Message Status command.
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