Centrifuge calibration for speed, timer and temperature
Centrifuge RPM calibration, timer verification and chamber temperature checks for laboratory and blood bank centrifuges, done on-site with traceable instruments.
What centrifuge calibration involves
Separation quality depends on the relative centrifugal force (RCF) applied for the right time. If the rotor runs slower than displayed or the timer runs short, serum and plasma may be poorly separated, cells may not pellet and results can shift. Centrifuge calibration catches these errors.
Our engineers carry out centrifuge calibration on-site, so heavy floor-standing and refrigerated units do not need to be moved. Speed is checked at several set points across the working range with a calibrated optical tachometer, using a reflective marker on the rotor or through the inspection window where the design permits.
Centrifuges are usually calibrated together with other laboratory equipment such as micropipettes and incubators, under our onsite calibration services.
Why centrifuge RPM calibration matters
Correct separation
Running at the intended RCF and time gives consistent serum, plasma and pellet separation.
Sample integrity
Refrigerated centrifuges must hold temperature to protect heat-sensitive samples and blood components.
Audit readiness
ISO 15189, ISO/IEC 17025 and GMP auditors expect calibrated centrifuges with traceable records.
What we check in centrifuge calibration
- Rotor speed (RPM) at multiple set points
- Calculated RCF for the rotor radius
- Timer accuracy against a calibrated stopwatch
- Chamber temperature for refrigerated centrifuges
- Acceleration and braking behaviour (observed)
- Lid lock and imbalance detection (functional)
- Display and set point agreement
- Visual condition of rotor, buckets and seals
Centrifuges we calibrate
Centrifuge speed and timer calibration method
For centrifuge speed and timer calibration, the engineer sets each test speed, allows the rotor to stabilise and records several tachometer readings. The average is compared with the set speed and the error is reported along with measurement uncertainty.
The timer is checked by running a set duration and timing it with a calibrated stopwatch from start to the beginning of deceleration, or as defined by the instrument. For refrigerated units, a calibrated temperature probe records chamber temperature at the set point after stabilisation.
Rotor radius and RCF are calculated from manufacturer data so the report links displayed RPM with the force your SOPs actually specify.
How often is centrifuge calibration needed?
Many laboratories schedule centrifuge calibration annually, with more frequent checks for blood bank and high-use units or where the quality system requires it. Recalibrate after motor, speed sensor or control board repairs, or after a rotor change.
Daily or weekly user checks such as visual inspection, imbalance alarms and cleaning do not replace calibration but help keep the unit in good condition between visits.
Keep an equipment list with each centrifuge's serial number, rotor types and due date. Planning centrifuge calibration in one visit with incubators, water baths and pipettes reduces downtime and keeps all laboratory records on the same cycle.
Keep each certificate with the equipment record, enter the next due date in your maintenance schedule and show both to auditors when asked. We keep a record of due dates for every client and can send a reminder before the next visit is needed, so nothing slips out of calibration between audits.
Centrifuge calibration certificates
Each certificate lists the instrument identity, test points, measured values, errors, uncertainty and the traceability of the tachometer, stopwatch and temperature probe used. Work is carried out within the laboratory's NABL scope where applicable; ask for the scope document for the ranges you need.
Results can be reported against your own tolerance or the manufacturer's specification, with a clear statement where a unit is outside limits and needs service. See also our NABL calibration certificate guide.
How the work is carried out
Scheduling
Share the centrifuge list with make, model, rotor types and set points used.
Pre-checks
Rotor, buckets, lid lock and balance are inspected before the run.
Measurement
Speed, time and temperature are measured at agreed set points.
Reporting
Traceable certificates with errors and uncertainty are issued for each unit.
One accountable team, documented results
NABL-Accredited
Calibration and testing carried out under NABL accreditation and ISO/IEC 17025:2017-compliant procedures.
On-Site & Laboratory Capability
Work carried out at your facility or in our laboratory, by one accountable team.
Serving Since 2022
Serving hospitals, laboratories, pharmaceutical and industrial clients across Tamil Nadu since 2022.
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Frequently asked questions
Schedule centrifuge calibration
Tell us how many centrifuges you have and where they are located, and we will plan an on-site visit.