YSI IQ SensorNet ViSolid Sensor 700 IQ - Manual (Page 39)

ViSolid
®
700 IQ (SW) Maintenance, cleaning, accessories
ba76040e04 05/2014 5 - 1
5 Maintenance, cleaning, accessories
5.1 General information
The ViSolid
®
700 IQ (SW) sensor does not usually require any mainte-
nance. The continuously running ultrasound system prevents the accu-
mulation of pollution right from the start.
5.2 Cleaning the sensor shaft and measurement windows
During normal operation (e.g. municipal wastewater), cleaning is rec-
ommended:

if there is any pollution (according to visual check)
 if the sensor was not in operation for a lengthy period of time but was
immersed in the measuring medium
 if the measured values are suspected of being incorrect (usually too
low)
 if the SensCheck message appears in the log book (when using
samples of matrix type 1)
 for regular cleaning (when using samples of matrix type 2)
 if there is any suspicion that the measurement window is polluted,
e.g. by dried on dirt during operation in the open air
Cleaning agents
WARNING
Chemical or biological hazard.
Contact with the sample can be harmful to the user.
Depending on the type of sample, suitable protective
measures must be taken (protective clothing, gog-
gles, etc.).
If the sensor remains in the sample for any length of time
when the system is not operating, we recommend to clean
the shaft and measurement windows.
Contamination Cleaning agents
Sludge and loosely adhering dirt
or biological films Soft cloth or soft brush, warm tap
water with detergent
Salt and / or lime deposits Acetic acid (volume percentage
= 20 %), soft cloth or soft sponge