Table 8-1: Status codes
Status code Meaning
12
Failed charge-amplifier self check. Return NAN instead of measured E
field
value.
13
Large closed shutter offset voltage. V
os
> |1.00 V|. Return NAN instead of
measured E
field
value.
14
Motor move error. Incorrect number of motor steps to close shutter.
Return NAN instead of measured Efield value.
15
Motor move error. Encoder UPCNTs < 24 or > 26. Encoder DNCNTs < 24
or > 26, or don’t find come when closing. Return NAN instead of
measured E
field
value.
16
Can’t properly position shutter. Return NAN instead of measured E
field
value.
17
CS110 internal RH reading is > 60%. Desiccant change is needed. Refer to
Changing desiccant (p. 28)
No priority issues exist with status codes 1 through 3 since only one of these codes can occur per
measurement.
Status codes 4 through 6 indicate the shutter was not properly positioned when the
measurement started, and the problem was recognized, corrected, and a valid measurement
made. Status codes 4 through 6 are common upon power up or if the shutter has been touched
or bumped since the last measurement of E
field
. Persisting status codes 4 through 6 indicate a
problem with parking the shutter that should be investigated.
Status codes 7 through 10 increase in priority with 7 being the lowest priority and 10 being the
highest priority. Status code 7 is a low priority error message, because low +5 V
ext
does not
corrupt electric field measurements. Status code 7 is overwritten by other warning and error
codes (status code >7).
Status codes 8 through 10 are the highest priority error messages returned by the CS110 and will
overwrite lesser errors that occur simultaneously during the E
field
measurement. Since only one
status value can be returned for each measurement, status 10 is given the highest priority, status
9 the second highest, and 8 the third highest priority. Next in priority are codes 16, 15, 14, 13, 12,
and 11, followed by 7, 6, 5, 4, 3, 2, and 1.
Status code 11 returns the measured E
field
value because the electric field computation algorithm
compensates for leakage current, even if it exceeds ±4.2 nA, although maximum signal
CS110 Electric Field Meter 27
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