YSI IFL 700 IQ - Manual (Page 27)

IFL 70x IQ Maintenance, cleaning, accessories
5 - 1 ba76129e01 10/2012
5 Maintenance, cleaning, accessories
5.1 General information
WARNING
Contact with the sample can be dangerous for the user!
Depending on the type of sample, suitable protective measures
must be taken (protective clothing, protective goggles, etc.).
5.2 Cleaning of the sensor shaft and ultrasonic trans-
ducer surface
NOTE
Sharp objects can damage the ultrasonic transducer. Please be care-
ful, especially when handling sharp tools, when cleaning and during
transport.
NOTE (only IFL 700 IQ)
If the sensor is connected to the IQ S
ENSOR N ET , the mechanical wiper
may start moving unexpectedly. Prior to cleaning the sensor, activate
the maintenance condition. Thus the wiper is switched off.
With normal operation (e.g. municipal wastewater) we recommend
cleaning the sensor in the following cases:

if there is any pollution (according to visual check)
 if the sensor was in the measuring medium but not in operation for
a longer period of time
 if you suspect the echo intensity to be too low
Cleaning agents
We recommend to clean the shaft and ultrasonic trans-
ducer surface of the sensor if the sensor has been in the
measuring solution without operating for a lengthy period of
time.
Contamination Cleaning agents
For sludge and loosely adhering
dirt, or biological deposits 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