User Manual
Table Of Contents
output August 19, 2019 8:28 Page 22
TROUBLESHOOTING
Problem:
The SulfiLogger App does not recognize the SulfiLog-
ger™ sensor when it is connected (version 1010 only).
Solution:
Try charging the battery of the PowerCom Box, or try
disconnecting the wire from the PowerCom Box to the sensor and
reconnect it subsequently.
Problem:
The SulfiLogger
™
sensor is showing values close to zero
all the time even though grab sample analysis of the medium
shows significant sulfide concentrations.
Solution:
The inlet of the SulfiLogger
™
sensor my be blocked by
fouling. Try rinsing the sensor and gently wiping the front with a
wet cloth, taking care not to apply force around the inlets of the
sensing elements. If the measurements are performed in liquid
phase (e.g. in wastewater), check the
pH
-value of the liquid. If the
medium is alkaline (above
pH
-8) then the dissolved sulfide is pri-
marily on the
HS
−
-form, which is not detected by the SulfiLogger
™
sensor. For slightly alkaline
pH
-values (
pH
-7-8), the
pH
-effect
can be corrected for, but for higher
pH
-values, we recommend
using the SulfiLogger
™
sensor in a low-volume sidestream reac-
tor, where the wastewater is acidified to ensure that all dissolved
sulfide is on the H
2
S-form.
Problem:
The SulfiLogger
™
sensor does not measure correct val-
ues according to our standard tests.
Solution:
When judging the accuracy of the SulfiLogger
™
sen-
sor we always recommend to apply a gas phase measurement
with gas from a pre-mixed gas bottle containing a known H
2
S con-
centration. Please note that the accuracy (grade) of gas bottle
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