amplitude becomes limited. Prolonged leakage current values near to and exceeding |±4.2 nA|
are likely due to insulator contamination, requiring removal of the stator and cleaning.
Status codes 12 through 16 all cause the measured electric field to be set to NAN to prevent the
use of possible erroneous measurements. The priority of codes 11 through 16 increases with
increasing values, although codes 8, 9, and 10 are higher priority.
8.2 Changing desiccant
The CS110 contains desiccant inside the sealed case to reduce humidity for the sensitive
electronics enclosed. A relative humidity sensor is included inside the CS110 case to provide
information on when case desiccant should be changed. The relative humidity measurement is
reported in the EFM_internal_RH_percent variable in the Public table.
For best operation, change CS110 desiccant when the average internal relative humidity values
are >20%.
How to change the desiccant in the CS110:
1. Remove the CS110 case lid by unscrewing the captive screws that attach the lid to the main
body of the CS110.
2. Inspect the gasket on the CS110 lid to make sure that a good seal is possible when the lid is
replaced.
3. Remove the old desiccant pack and replace with a new 4 unit desiccant pack, making sure
the new pack is placed into the bracket that prevents the desiccant from sliding into the
motor assembly.
If the sealed CS110 case requires replacing desiccant at intervals less than once every six months,
it indicates a problem with the CS110 case seal or with the desiccant packs being used.
Status code 17 indicates that humidity inside the CS110 has reached a critical level and desiccant
needs to be changed. For best operation, the desiccant should be changed when RH exceeds
20%, while status code 17 warns that RH has exceeded 3 times that value.
CS110 Electric Field Meter 28
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