Hach-Lange DR 3900 User Manual - Manual (Page 141)

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Section 11 Warranty, liability and complaints
The manufacturer warrants that the product supplied is free of
material and manufacturing defects and undertakes the obligation
to repair or replace any defective parts at zero cost.
The warranty period for instruments is 24 months. If a service
contract is taken out within 6 months of purchase, the warranty
period is extended to 60 months.
With the exclusion of further claims, the supplier is liable for
defects including the lack of assured properties as follows: All
those parts that, within the warranty period calculated from the
day of the transfer of risk, can be demonstrated to have become
unusable or that can only be used with significant limitations due
to a situation present prior to the transfer of risk, in particular due
to incorrect design, poor materials or inadequate finish will be
improved or replaced, at the supplier's discretion. At the
discretion of the supplier, these deficiencies will be corrected or
the instrument replaced. The identification of such defects must
be notified to the supplier in writing without delay, however at the
latest seven days after the identification of the fault. If the
customer fails to notify the supplier, the product is considered
approved despite the defect. Further liability for any direct or
indirect damages is not accepted.
If equipment-specific maintenance and servicing work defined by
the supplier is to be performed within the warranty period by the
customer (maintenance) or by the supplier (servicing) and these
requirements are not carried out, claims for damages are
rendered void due to the failure to comply with the requirements.
Any further claims, in particular claims for consequential
damages, cannot be made.
Consumables and damage caused by imcorrect handling, unsafe
assembly or by incorrect use are excluded from this provision.
The instruments of the manufacturer are of proven reliability in
many applications and are therefore often used in automatic
control loops to provide the most economical possible operation
of the related process.
To avoid or limit consequential damage, it is therefore
recommended to design the control loop such that a malfunction
in an instrument results in an automatic change over to the
backup control system, which is the most secure operating
condition for the environment and for the process.