Error code Cause Recommended action
Err 110 If using one probe with the data logger:
• No probe connected at startup
• Incompatible probe detected
• Trying to switch from two probe use to
single probe use without performing a
factory reset
1. Verify that a compatible probe is
connected to the data logger.
2. Power cycle the data logger to re-
detect the probe.
3. If the error persists, it is likely that the
data logger has been set up in two
probe mode. Perform the factory
reset procedure to allow single probe
use again, then power cycle the
logger to re-detect the probe.
If using two temperature probes with the
probe splitter:
• No probes connected at startup
• Two probes connected at same time
without following proper setup or
probe swap procedure
• Data logger is in dual probe mode but
one probe is missing
• Unsupported probe combination
• At least one incompatible probe
detected
1. Verify that that probe splitter and
two supported temperature-only
probes are connected to the data
logger.
2. If you reconnected any probes, power
cycle the data logger to re-detect the
probe(s).
3. If the error persists, perform the two-
probe setup again.
Err 200 Real-time clock battery voltage is low. Replace the clock battery.
Err 202 Communication failure with at least one
probe that was detected at startup.
1. Check that the probe(s) are
connected properly.
2. If you reconnected any probes, wait
one minute for the display to update
and verify that the error is gone.
3. If the error persists, power cycle the
data logger to re-detect the probe(s).
Err 203 Probe error. Can be caused by probe
damage or a wet humidity sensor.
Inspect the probe and replace it if
necessary. If the error has been caused
by a wet humidity sensor, wait for it to
dry out.
Err 204 Real-time clock temperature
compensation problem.
If error code Err 200 is also active,
replace the clock battery. If the error
persists, contact Vaisala.
More information
‣
Probe detection (page 31)
‣
Probe replacement (page 39)
‣
Changing RFL100 clock battery (page 54)
RFL100 User Guide M211861EN-D
58
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