Identify the delivery assembly
Send the model, serial number, volume range and whether the setting is fixed or adjustable. Include the dispensing tube, filling tube and adapters normally fitted. For a digital burette, identify the display unit and the delivery mode used by the laboratory. A photograph of the complete assembly helps distinguish similar model variants.
List the volumes required by the approved procedure and the acceptance limits for the instrument. If an earlier service changed the piston, valve or delivery tube, include that record. State whether the work should retain results before adjustment as well as the final measurements.
Make the volume result traceable to the setup
A gravimetric volume comparison uses repeated deliveries and the relevant measurement conditions to evaluate the delivered volume. Ask for the report to identify the settings checked, repeated results or their agreed summary, and the criteria used for any conformity statement. A single successful delivery does not describe the variation between successive operations.
A burette’s accumulated volume record and a dispenser’s selected dose require the appropriate procedure for that instrument. RTS will review the model, test-liquid requirement and requested points before accepting the job. The calibration enquiry concerns delivered volume; it does not establish the concentration of a titrant or the result of an analytical method.
Agree preparation before dispatch
Disclose the liquids previously handled and follow the maker’s cleaning and decontamination instructions. Do not send reagent bottles or process liquid without an agreed receiving arrangement. Ask which dry, prepared components should travel and keep the serial number visible on the packing list, with the laboratory’s return contact.