EEG machine calibration and EMG calibration for neurology departments
Amplifier gain, filters, noise, impedance measurement and stimulator output verified on EEG, EMG and nerve conduction systems using calibrated signal sources, at your hospital.
What EEG machine calibration involves
EEG and EMG systems record very small biological signals, in the microvolt to millivolt range. Small errors in gain, filter settings or channel matching change amplitude measurements and the appearance of waveforms, and rising noise can hide genuine activity.
EEG calibration feeds a calibrated signal of known amplitude and frequency into each channel through the electrode inputs. We compare the displayed amplitude and frequency with the reference, check high-pass, low-pass and 50 Hz notch filters, measure baseline noise with inputs shorted, and test the built-in impedance meter against reference resistors.
EMG calibration covers the same amplifier checks plus the electrical stimulator used for nerve conduction studies. Neurology equipment is covered within our wider medical equipment calibration service.
Why EEG calibration and EMG calibration matter
Amplitude accuracy
Reports often quote amplitudes. Correct gain on every channel keeps those numbers meaningful and comparable between studies.
Channel matching
Asymmetry between hemispheres is clinically important. Channels must match each other so that differences are real, not instrumental.
Stimulus control
In nerve conduction studies the stimulator must deliver the current and pulse width shown. Measured output confirms it.
Parameters checked in EEG machine calibration and EMG calibration
- Amplifier gain / sensitivity on every channel using a calibrated signal
- Channel-to-channel matching
- High-pass, low-pass and 50 Hz notch filter response
- Baseline noise with shorted inputs
- Electrode impedance meter accuracy against reference resistors
- Display time base and photic stimulator rate on EEG systems
- EMG / NCS stimulator current and pulse width into a test load
- Electrical safety per IEC 62353, including applied part leakage
Where we calibrate neurophysiology equipment
EMG calibration for nerve conduction and evoked potential systems
EMG and nerve conduction systems combine sensitive amplifiers with a stimulator. We check amplifier gain and filters as for EEG, then measure stimulator output current and pulse duration into a defined test load at several settings.
Where the system supports evoked potentials, averaging and trigger timing can be checked with a calibrated signal source. Results are compared with the manufacturer's specification.
Accessories such as stimulating probes, ground electrodes and cables are inspected for damage, since they are a common source of noise and inconsistent results.
How often EEG machine calibration is scheduled
Most hospitals schedule EEG machine calibration and EMG calibration once a year, alongside the manufacturer's preventive maintenance and the daily calibration routine many systems run on start-up.
Recalibrate after repairs, headbox or amplifier replacement, software upgrades, relocation, or whenever technologists notice unusual noise or asymmetry that disappears when the patient is changed. The biomedical team sets the final interval.
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.
On-site EEG machine calibration in Tamil Nadu
Neurophysiology systems are tested at your hospital, between studies, so recording schedules continue. Portable ICU EEG units can be tested in the department or on the ward.
We serve hospitals across Salem, Namakkal, Erode, Coimbatore, Dharmapuri, Krishnagiri and other districts. See our hospital calibration services and related ECG machine calibration and patient monitor calibration.
Certificates record system details, reference equipment, set and measured values per channel and measurement uncertainty, issued within the laboratory's NABL scope where applicable.
How the work is carried out
List
Share your EEG, EMG and NCS systems with make, model, channel count and location.
Measure
Calibrated signals are applied to each channel to check gain, filters, noise and impedance readings.
Stimulator
EMG stimulator current and pulse width measured into a test load, plus IEC 62353 electrical safety.
Certify
You receive a certificate per system, with channel-wise results and any service notes.
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
Book EEG machine calibration and EMG calibration
Send your neurophysiology equipment list and preferred dates, and we will plan an on-site visit around your study schedule. Call +91 99949 13872.