Test equipment repair · Electrical

Electrical Test Equipment Repair

Techmaster repairs electrical test equipment: multimeters, oscilloscopes, DC power supplies, electronic loads, AC power sources, hipot and insulation testers, clamp meters and current probes. After repair, each instrument is calibrated before it is returned, and DC and low-frequency electrical calibration is on our ANAB ISO/IEC 17025 scope at all four accredited labs.
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Which electrical equipment do you repair?

InstrumentDetails
MultimetersRepair guide
OscilloscopesRepair guide
DC power suppliesAsk about repair
Electronic loadsAsk about repair
AC power sourcesAsk about repair
Hipot testersAsk about repair
Insulation testersRepair guide
Clamp metersAsk about repair
Current probesRepair guide

We repair instruments from many manufacturers, including older and discontinued models where parts are available. Techmaster is an independent laboratory, not a manufacturer-authorized service center.

Electrical manufacturers we know best

Techmaster has completed 56,750 electrical calibrations in the last ten years across 7,039 instrument lines. These are the manufacturers whose instruments we calibrate most often:

ManufacturerUnits calibrated (10 years)
Fluke11,015
Agilent6,112
Tektronix4,481
Chroma3,509
Keysight2,532
Kikusui2,117
BK Precision1,824

Common electrical faults we see

  • Blown input fuses and damaged current shunts on multimeters after a measurement on the wrong range.
  • Power supply failures from aged electrolytic capacitors, failed fans or damaged output transistors, seen as high ripple, unstable output or shutdown under load.
  • Electronic load failures in the power MOSFETs or fans, usually after long running near the power limit.
  • Oscilloscope input channel damage from overvoltage, seen as a dead channel or a self-test failure.
  • Hipot tester high-voltage relay and transformer wear, seen as output that will not reach the set voltage or false trips.

How does a repair work?

Send the make, model and serial number with a description of the fault and any error codes. We diagnose the fault and send a quote with the expected timeline and warranty terms for your approval. After repair, the instrument is calibrated and returned with its certificate.

What calibration comes after the repair?

DC and low-frequency electrical calibration (DC voltage to 1.1 kV, current to 1,000 A via shunts, clamp-on current to 1,025 A) is on the ANAB scope at all four accredited labs. High voltage is accredited to 100 kV at Vista and 150 kV at San Antonio, high resistance to 10 PΩ at San Antonio only, and AC high current to 1,500 A at Orlando and San Antonio. Exact ranges and uncertainties are on our published accreditation scope.

Need to keep testing while your instrument is away? You can rent electrical test equipment for the repair period.

Frequently asked questions

Which electrical instruments can you repair?
Multimeters, oscilloscopes, DC power supplies, electronic loads, AC power sources, hipot and insulation testers, clamp meters and current probes. Send the make, model and fault description for a quote.
Is the instrument calibrated after repair?
Yes. It is calibrated before it is returned, with an ISO/IEC 17025 accredited certificate for the parameters on our ANAB scope and a NIST-traceable certificate otherwise.
Why does my power supply shut down under load?
Common causes are a failed fan or blocked airflow tripping over-temperature protection, aged output capacitors, or a damaged output stage. Send the model, the voltage and current where it shuts down and any error code, and we quote the diagnosis and repair.
Do you repair Chroma and Kikusui electronic loads?
We repair electronic loads from many manufacturers where parts are available. Chroma and Kikusui are among the electrical brands we calibrate most often. Send the model, the fault and the operating point where it appears for a quote, timeline and warranty terms.
Is Techmaster an authorized service center?
No. Techmaster is an independent repair and calibration laboratory, not a manufacturer-authorized service center. It repairs instruments from many manufacturers, including older models, where parts are available.
How long does a repair take, and is there a warranty?
It depends on the fault and on parts availability. We include the expected timeline and the warranty terms with the quote.

Need electrical equipment repaired?

Send the make, model and a description of the fault. We reply with a quote, the expected timeline and the warranty terms.

Request a repair quote