Field Service and Maintenance Instrumenation. The hourly rate is valid for working hours Mo-Fr (without public holidays) 7am-7pm. Waiting time will be charged like working time. For different times surcharges will be added in accordance with current valid price list. Billing of hours takes place according to proof in Service report. ****************************** When ordering, please specify: Contact, Telephone number, Location of service, Device type and number. ******************************