Sensor Error Codes

Occasionally, a data table will contain error codes instead of a measurement value. These error codes can indicate when there is a problem with the sensor or the measurement value that is returned by the sensor to the data logger.

CODE	DEFINITION	ISSUE
65528	Sensor calibration problem	The sensor is reporting a problem with its calibration values or a critical setting. This could be from a broken sensor or corrupted firmware.
65529	Excitation under-voltage error	The sensor is reporting that the excitation voltage is too low to reliably make a measurement. This could be because the data logger is low on power. Install new batteries and check the PCB board for corrosion.
65530	Sensor is reporting a temporary lack of data	The sensor is reporting that it temporarily cannot make the measurement; the measurement value will return when the state returns to normal *(e.g., the ATMOS 41 detects an error when the sonic transducers are covered by water. The measurement value will return when the water covering the transducer clears).* The sensor (or sub-sensor) is reporting a temporary lack of data with a -9990 value. Logger doesn’t increment the port error counter but excludes this data when calculating the average. Use case example: the ATMOS 41 uses this error when it detects that there is water clogging the sonic transducer screens. The user's data will drop out, but the application won't be alerted that their sensor is broken.
65531	Sensor type not supported	The sensor type is not supported/recognized by the data logger; this could be because the logger firmware version is older/out of date. Update the logger firmware to the latest version. Check your Firmware version to see if you have the most up-to-date available.
65532	Sensor communication error	There is communication between the sensor and the data logger, but this communication appears to be corrupted. This could be from a broken sensor or a sensor with corrupted firmware. This could indicate the sensor is unplugged from the port or the cable has been damaged. A field visit would be required. Check for damage to the cable. Using the "SCAN" function on your ZENTRA Utility (via laptop or phone), check if you receive any response from the sensor. If you do not, try plugging the sensor into another port. If no response, contact support.environment@metergroup.com with the Sensor specifics, Logger ID number, and any data showing the error.
65533	Sensor is reporting an error	There is no communication between the sensor and the data logger; this could be from an unplugged or broken sensor. This could indicate the sensor is unplugged from the port or the cable has been damaged. A field visit would be required. Check for damage to the cable.
65534	No response from sensor	The sensor and data logger are not communicating with each other; this could be due to an unplugged or broken sensor. This could indicate the sensor is unplugged from the port or the cable has been damaged. A field visit would be required. Check for damage to the cable. Using the "SCAN" function on your ZENTRA Utility (via laptop or phone), check if you receive any response from the sensor. If you do not, try plugging the sensor into another port. If no response, contact support.environment@metergroup.com with the Sensor specifics, Logger ID number, and any data showing the error.
65535	Erased flash memory	Contact Support Please contact support.environemnt@metergroup.com with your logger ID number.
65536	Sensor value outside the expected range	The values are unexpected; this could be from a misconfigured port, corrupted firmware, or broken sensor. Check your sensors' valid range in the sensor specifications. If your sensor is Analog ( ex, TEROS 10, VP4), make sure the port configuration is correct for your sensor Check the sensor physically and make sure it is properly plugged in, has no nicks or cramps on the cable (rodent damage) Use Case: Water potentials below -2,000 kPa exceed the detection limits of the TEROS 21 Gen1. When water potential is below -2,000 kPa, the TEROS 21 will report an error code (-9990), and an error message will appear (Sensor value is temporarily out of range).
65537	Invalid Value	The sensor is reporting that a processed value became NaN (not a number) or infinite.
65538	Alpha value too low	The sensor is reporting that alpha for NDVI is < 0.79 or > 2.0; for PRI < 0.02
65539	Radiance value(s) too low	The sensor is reporting that the measured value is too low to calculate the index. This could be because the radiance values are freq_1 < 0.0001 and freq_2 < 0.001.
65540	Calculation exceeds limits	An input value to the computation exceeds the acceptable limit of the model. Example 1: NDVI or PRI exceeds the limit (e.g., < -1 or > 1; Example 2: VPD is < 0 or > 10000.
65541	Calculation error	The sensor is reporting an unexpected process error for the calculated value.
65542	Value exceeds limits of the model	The values are unexpected, the values are too extreme to be considered reasonable; this could be from a misconfigured port, corrupted firmware, or broken sensor. This error code only appears on Em50 data loggers.

Contact