Give the lowest pressure you need checked
Keep the units and sign used by the instrument and identify an absolute or gauge reading where marked. Include the normal operating pressure, the lowest requested point and any switching threshold. For a compound dial, say if the positive-pressure portion is also required.
Identify what connects to the chamber
List the sensing head, cable and controller if these are separate items. Give the flange or thread type and the gas or vapour present during operation. Tell us about oil or process residue before shipment. RTS will review compatibility and achievable pressure against the requested points before agreeing the work.
Keep the gas setting with the pressure result
Some electronic vacuum gauges infer pressure from a gas-dependent property. A Pirani head, for example, responds to gas thermal conductivity. State the gas setting selected in the controller and the process gas used at the plant. These details help the reviewing laboratory decide which reference gas and configuration belong on the quotation.
For a combined gauge head, identify any changeover between sensing elements within the requested pressure interval. Supply the points your process uses around that region instead of only the two range endpoints. If a relay or controller threshold releases a process step, list its setpoint and request the switching assessment separately. Agree whether initial readings and stored settings must be retained before cleaning or adjustment. The completed report should identify the head and controller pairing used for the measurement.
Plan the maintenance handover
Give the maintenance window and the contact who can arrange isolation and removal by the plant team. If the controller and gauge head come from separate stores, put both asset numbers on the request. Confirm the condition of the process connection and agreed receiving instructions before dispatch.
Capacitance diaphragm gauges
For a capacitance diaphragm gauge, identify the sensing head, controller, range and any temperature-controlled head setting. Give the absolute-pressure points and process connection needed in the report. Keep zeroing history and prior contamination information with the instrument record. RTS must match the requested pressure range and method to an available reference; the name vacuum gauge alone does not establish that a particular low-pressure interval is covered.
Extractor gauges
An extractor gauge is a specialist ionisation gauge rather than a conventional dial vacuum gauge. Identify the head, controller, cable and gas for which readings are required. Supply the manufacturer's operating and verification information, including the requested pressure interval. RTS will review the facility and reference method before acceptance. Any existing rough-vacuum scope entry should not be assumed to cover the much lower pressures associated with this instrument.
Hot cathode gauges
A hot cathode gauge enquiry should identify the sensor and controller as a pair, with the gas and selected operating conditions. Include filament history where it affects the current configuration and record any previous sensitivity factors. The required pressure interval and gas correction need specific technical review. RTS cannot infer full ionisation-gauge coverage from a general pressure entry, so send the manufacturer procedure with the enquiry.
Spinning rotor gauges
A spinning rotor gauge used as a transfer reference should retain the sensor-head and controller identities, orientation and prior calibration factors. State the gas, requested pressure points and the reference role it serves in your laboratory. Keep transport and installation instructions with the kit. RTS must review a suitable specialist comparison before accepting the enquiry; a reference instrument's name does not make its full range part of the published scope.
Vacuum pumps in a calibration setup
A vacuum pump is normally part of the apparatus that establishes a pressure, while a separate gauge provides the measurement. Record the pump type, connections and intended use. If the requirement concerns ultimate pressure, pumping behaviour or another performance quantity, provide the method and conditions for review. RTS should agree that work separately from gauge calibration; a pump's presence in the kit does not make it an indicating instrument.
Pirani gauges
A Pirani gauge response depends on the gas as well as the sensor condition. State the gas or correction setting, controller identity and pressure interval required. If the instrument changes automatically between sensing principles, identify the range to be evaluated. RTS must review the applicable reference and method before accepting the gauge. Keep the selected gas and any adjustment history with the result rather than reporting an unqualified vacuum value.
Vacuum probes with separate controllers
For a vacuum probe, identify its sensing principle, head serial number, cable and controller. A probe and controller that can be interchanged still need their measurement pairing recorded. Give the required pressure points and gas conditions, including any correction stored in the controller. RTS can review whether the head alone or the complete indication chain can be accepted and state the appropriate measurement boundary in the quotation.
Cold traps in vacuum systems
A cold trap is part of a vacuum or condensation system and may have separate temperature and pressure instrumentation. Identify what needs to be measured: a sensor indication, temperature at a named position or another performance quantity. Include the coolant and configuration from the operating procedure. RTS can review those defined requirements, while the trap itself remains an apparatus enquiry rather than an assumed standalone pressure-calibration service.