Xylem YSI VARiON Plus 700 IQ H, Operating Manual, Page: 39 / 62

VARiON
® Plus
700 IQ H Maintenance and electrode exchange
39
ba76207e02 12/2020
6 Maintenance and electrode exchange
6.1 General maintenance instructions
Maintenance condition We recommend to switch on the maintenance condition each time the
sensor is taken out of the measuring position. This avoids unwanted
reactions of linked outputs. More detailed information on the mainte-
nance condition is given in the respective IQ
S
ENSOR
N
ET
system oper-
ating manual.
VARiON
®
/Epack The VARiON
®
/Epack set with usual replacement parts is available for
maintenance (see chapter 7 R
EPLACEMENT PARTS AND ACCESSORIES
).
6.2 Exterior cleaning
With normal operation (e.g. municipal wastewater) we strongly recom-
mend to clean the outside of the sensor:
 when it is strongly contaminated (after visual check)
 if erroneous measured values are suspected
 each time before removing or exchanging an electrode
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.).
To keep the electrodes clean, we recommend to use the
CH cleaning head (see chapter 7 R
EPLACEMENT PARTS AND
ACCESSORIES
).
NOTICE
Do not use any detergent or deionized water for clean-
ing. Heed the notes in section 3.2.1 E
FFECTS TO BE
GENERALLY AVOIDED
.