Description
ISA Cap-Cal Calibrator Repair Services
The ISA is a critical instrument used by transformer maintenance crews, utility asset managers, transformer manufacturers, and substation commissioning teams. When this equipment fails or drifts out of specification, June Company delivers expert repair and NIST-traceable calibration to restore full operational accuracy.
About the ISA
As a ttr tester instrument, the ISA is designed for demanding applications. Specifically, TTR (transformer turns ratio) testers measure the turns ratio, excitation current, and polarity of power and distribution transformers to verify winding integrity. Accurate and reliable performance is essential — measurement drift or component failure can cause costly errors, compliance issues, and project delays.
Common TTR Tester Issues We Repair
Our repair process addresses the root cause of every issue:
- Battery degradation: resolved through targeted diagnostics and precision repair techniques
- Ratio measurement accuracy drift: diagnosed through systematic testing and resolved with component-level repair
- Excitation current source degradation: identified during our multi-point inspection and corrected to restore specification performance
- Test lead interface wear: addressed with OEM-grade components and verified against traceable standards
- Display module failure: repaired by technicians experienced with ISA instrumentation
Calibration and Performance Verification
Every ISA repair includes NIST-traceable calibration covering key parameters such as turns ratio, excitation current, and polarity. We issue detailed calibration certificates documenting measured performance against manufacturer specifications.
Why Choose June Company for ISA Repair?
Customers choose June Company for our depth of technical expertise:
- Traceable Calibration: NIST-traceable calibration certificates included with every repair
- 90-Day Warranty: All repairs backed by our parts and labor warranty
- Fast Turnaround: Most repairs completed in 5–10 business days
- Transparent Pricing: Detailed quotes before work begins — no surprises
- Nationwide Service: Secure shipping and service for customers across the United States
- OEM-Grade Parts: Genuine or equivalent components for lasting reliability
How Our Repair Process Works
- Free Evaluation: Ship your ISA to our facility. We provide a detailed assessment and firm quote at no cost.
- Expert Repair: Certified technicians perform ratio measurement recalibration, excitation source repair, test lead connector replacement, and traceable ratio accuracy verification.
- Calibration: Full NIST-traceable calibration with documented results across all critical parameters.
- Quality Verification: Final functional testing confirms your instrument meets or exceeds original specifications.
- Return Shipment: Securely packaged and shipped with calibration certificate and repair documentation.
Industries We Serve
The ISA is used by transformer maintenance crews, utility asset managers, transformer manufacturers, and substation commissioning teams. June Company understands the operational demands of these fields and the importance of keeping critical test equipment in service.
Request a Repair Quote
Contact June Company for professional ISA repair and calibration. Our team is ready to evaluate your instrument and provide a no-obligation quote.
Email: info@juneusa.com






