LabTower EDI
Ultrapure water system
51
18. Maintenance record
(Please note that correct keeping of this record is a condition for the validity of the guarantee)
Customer address:
Location:
System type:
Serial no.:
Year made:
Date
Conductivity
Permeate
[µS/cm]
Conductivity
EDI
[µS/cm]
Conductivity
Ultrapure
water
[µS/cm]
Product
EDI
[L/h]
Concentrate
EDI
[L/h]
Operating
hours RO
[h]
Change of
prefilter
yes/no
Change of
hardness
stabilizer
yes/no
Change of
sterile filter or
fine filter
yes/no
Change of
ultrapure
water module
yes/no
Remarks
Signature
Any false entry is considered to be a falsification of documents.
The following points are to be observed to ensure the quality of the system:
1
each week, record measured values
Every
3 - 6
months* - change the hardness stabilizer
Every
3 - 6
months* - change the prefilter
*According to the quality of the feedwater
