Horiba Scientific LAQUAtwin B-74 Series Manual page 52

 Store the response membrane of the flat sensor in dry conditions.
If the response membrane gets wet for a long time, it may become
deformed.
 Do not measure samples such as the following, since they may
damage the sensor or shorten its life: Organic solvents, oils, adhesives,
cement, alcohols, concentrated acid (0 pH to 2 pH), concentrated
alkaline (12 pH to 14 pH) or surfactants.
 When using this product for the first time or after several weeks of
disuse, the sensor may be slow to respond. In this case, add some
drops of high-concentration standard solution to the sensor and wait 10
minutes to an hour before use (there is no need to turn the power ON).
 For some sample types (such as highly oily samples), the measured
value may be unstable.
 A small amount of liquid or white powder may appear on the liquid
junction of the flat sensor. The appearance of this powder or solution is
normal. Simply rinse it off with water before use.
 Battery
 Keep batteries out of reach of children. If someone accidentally
swallows a battery, call a doctor immediately.
 Do not throw batteries in fire.
 Do not attempt to recharge batteries.
 The provided batteries are intended for use in operation checking,
therefore their service life may be short.
 The battery alarm icon lights up when the battery voltage is low.
Replace the batteries when the battery alarm icon lights up. The meter
power may not be turned ON/OFF when the battery voltage is low.
 Replace the 2 batteries at the same time.
 Others
 Only use the product including accessories for their intended purpose.
 Wash off any calibration fluid that comes into contact with hands or
other exposed skin. If fluid gets in eyes, rinse them immediately and
see a doctor.
 Do not drink a sample after measurement. The response membrane of
the flat sensor is made of PVC, and the plasticizer in PVC may seep
into the sample used for measurement.
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