141Section 11 Warranty, liability and complaintsThe manufacturer warrants that the product supplied is free ofmaterial and manufacturing defects and undertakes the obligationto repair or replace any defective parts at zero cost.The warranty period for instruments is 24 months. If a servicecontract is taken out within 6 months of purchase, the warrantyperiod is extended to 60 months.With the exclusion of further claims, the supplier is liable fordefects including the lack of assured properties as follows: Allthose parts that, within the warranty period calculated from theday of the transfer of risk, can be demonstrated to have becomeunusable or that can only be used with significant limitations dueto a situation present prior to the transfer of risk, in particular dueto incorrect design, poor materials or inadequate finish will beimproved or replaced, at the supplier's discretion. At thediscretion of the supplier, these deficiencies will be corrected orthe instrument replaced. The identification of such defects mustbe notified to the supplier in writing without delay, however at thelatest seven days after the identification of the fault. If thecustomer fails to notify the supplier, the product is consideredapproved despite the defect. Further liability for any direct orindirect damages is not accepted.If equipment-specific maintenance and servicing work defined bythe supplier is to be performed within the warranty period by thecustomer (maintenance) or by the supplier (servicing) and theserequirements are not carried out, claims for damages arerendered void due to the failure to comply with the requirements.Any further claims, in particular claims for consequentialdamages, cannot be made.Consumables and damage caused by imcorrect handling, unsafeassembly or by incorrect use are excluded from this provision.The instruments of the manufacturer are of proven reliability inmany applications and are therefore often used in automaticcontrol loops to provide the most economical possible operationof the related process.To avoid or limit consequential damage, it is thereforerecommended to design the control loop such that a malfunctionin an instrument results in an automatic change over to thebackup control system, which is the most secure operatingcondition for the environment and for the process.