In This Article

  1. The Core Difference
  2. What PCREE Testing Actually Checks
  3. What Calibration Actually Checks
  4. Why Most Facilities Need Both
  5. Scheduling Both in the Same Visit

"Is PCREE testing the same as calibration?" is one of the more common questions from administrators new to equipment compliance — understandably, since both are performed by biomedical technicians, both result in a certificate, and both show up in the same equipment maintenance conversation. They measure fundamentally different things, though, and a facility that only does one is missing part of its compliance obligation.

The Core Difference

PCREE testing checks whether a device is electrically safe. Calibration checks whether a device's measurements are accurate. A patient scale can be perfectly safe electrically — no leakage current risk, solid ground path — while reading 8 pounds off due to calibration drift. Conversely, a scale can be perfectly calibrated and accurate while having a frayed power cord that creates a genuine electrical safety hazard. Neither test substitutes for the other.

What PCREE Testing Actually Checks

PCREE (Patient Care Related Electrical Equipment) testing, required under NFPA 99 Chapter 10, measures chassis and patient leakage current, ground resistance, and polarity using a calibrated electrical safety analyzer. It answers the question: if something goes electrically wrong inside this device, is a resident or staff member protected from harm? It applies to any electrically powered device with patient care contact — beds, lifts, monitors, pumps, and scales among them.

What Calibration Actually Checks

Calibration measures whether a device's output — a weight reading, a blood pressure value, a temperature — matches a known reference standard within an acceptable tolerance. A scale is calibrated against NIST-traceable reference weights; a vital signs monitor is calibrated against a reference signal generator. Calibration doesn't touch electrical safety at all — a device can be recalibrated to perfect accuracy while its power cord ground pin is corroded and its leakage current is out of spec.

Why Most Facilities Need Both

Any electrically powered measurement device in a skilled nursing facility — patient scales being the clearest example — typically needs both PCREE electrical safety testing and calibration, on their own separate schedules, with separate documentation. CMS surveyors reviewing equipment records may ask about either, and a facility that can produce a calibration certificate but not a PCREE test record (or vice versa) has only addressed half of what a complete equipment compliance program covers for that device.

Devices that typically need only PCREE testing, not calibration: hospital beds, patient lifts, and other equipment that doesn't produce a measured clinical value. Devices that typically need both: patient scales, vital signs monitors, and any other device where both electrical safety and measurement accuracy matter.

Scheduling Both in the Same Visit

Most facilities find it efficient to schedule PCREE testing and calibration for the same devices during the same technician visit — the technician is already on-site and set up at the device, and consolidating both into one visit reduces the number of separate service calls a facility needs to coordinate throughout the year. See our related guide, How to Evaluate a PCREE Testing Vendor, for what to ask a prospective vendor about whether they offer both services.

Frequently Asked Questions

Is PCREE testing the same as calibration?
No. PCREE testing measures whether a device is electrically safe (leakage current, ground resistance, polarity). Calibration measures whether a device's readings are accurate against a reference standard. A device can pass one and fail the other — they're separate requirements that don't substitute for each other.
Which devices need both PCREE testing and calibration?
Any electrically powered device that produces a measured clinical value — patient scales and vital signs monitors are the clearest examples — typically needs both PCREE electrical safety testing and calibration, on separate schedules. Devices like hospital beds and patient lifts generally need only PCREE testing since they don't produce a measured reading.
Can PCREE testing and calibration be done in the same visit?
Yes, and most facilities find this the most efficient approach — scheduling both for applicable devices during the same technician visit reduces the number of separate service calls needed throughout the year.

About the Author

PCREE Test Editorial Team

Content reviewed by biomedical professionals with experience in patient care electrical equipment testing, NFPA 99 compliance, and CMS Life Safety survey preparation for skilled nursing facilities.