METER GROUP ATMOS 14 GEN 2, Manual

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17
ATMOS 14 GEN 2
Table 2 Salt solutions
Equilibrium RH
(% saturation)
Salt
Molality
(mol salt/kg water)
25 LiCl 13.41
50 LiCl 8.57
76 NaCl 6.00
If the ATMOS 14 sensor has lost accuracy due to exposure to solvents or other chemicals, the
following conditioning procedure may bring the sensor back to the original calibration state:
1. Remove the sensor module from the ATMOS 14 sensor body as described in
Section 4.2 .
2. Bake the sensor module in dry heat at 100 to 105 °C for 10 h.
3. Rehydrate the sensor modules by exposing them to a ~75% RH environment at 20 to
30 °C for 12 h.
A 75% RH environment can be conveniently established by sealing the sensor module in
a headspace over prepared saturated NaCl.
4.4 TROUBLESHOOTING
Table 3 lists common problems and their solutions. Most issues with the ATMOS 14 sensor
may manifest themselves in the form of no reading from communication problems,
catastrophic sensor failure, or highly inaccurate measurements due to sensor poisoning
by volatile chemicals. If the problem is not listed or these solutions do not solve the issue,
contact
Customer Support .
Table 3 Troubleshooting the ATMOS 14
Problem Possible Solutions
Data logger not
receiving readings
Check that the connections to the data logger are correct and secure.
Ensure that data logger batteries are not dead or weakened.
Check sensor cables for nicks or cuts that could prevent communication.
Check the configuration of the data logger in ZENTRA Utility to make sure
the ATMOS 14 is selected.
Check that the sensor module is properly connected to the sensor body
(follow instructions in Section 4.2 ).
Sensor not reading
barometric pressure
accurately
Check the filter for contamination or obstructions. Airflow must not be
restricted through the filter. Seal and pressurize the sensor (e.g., with
mouth or hand) and check for a corresponding change in measured
barometric pressure to see if adequate airflow is present.