7
Instrument Maintenance
Sample collection,preservation and storage.
The residual chlorine in the water sample is extremely unstable.It should be measured immediately after
sampling,and strong light vibration and warmth should be avoided from beginning to end.
Standard solution configuration:Refer to HJ586-2010 of China National Environment Protection Standard.
Interface factors
Oxidant:amine,iodine,bromine,amine,iodoamine,hydrogen peroxide,chromate,ytterbium oxide,ozone
etc.
Reducing agent:nitrite etc.
If the alkalinity of the water exceeds 250mg/L or the acidity exceeds 150mg/L,the measured value will
be unstable,and it can be adjusted by adding dilute hydrochloric acid or sodium hydroxide solution.
Battery replacement
1.Use a Phillips screwdriver to remove the battery cover at the bottom of the instrument.
2.Take out the battery,don’t place it randomly,and recycle it in an environmentally friendly way.
3.Put 2 new AA batteries into the battery slot,paying attention to the direction of the batteries.
4.Reassemble the battery cover with the removed screws.
5.If the battery is not used for a long time,the battery must be taken out to prevent battery leakage.
