PG LifeLink delivers retrofits, LIM replacements, and service with unmatched speed and support.
Isolated Power Panel & Line Isolation Monitor Testing
PG LifeLink offers Isolated Power Panel Testing for all facilities using Isolated Power. PG LifeLink’s qualified Field Service Technicians are specifically trained on all brands and models of Isolated Power Panels. PG LifeLink provides annual testing services to thousands of facilities across the country and offers convenient evening and weekend service scheduling. Facilities are provided with a comprehensive test report noting any observations or issues on the room's electrical system.
PG LifeLink provides NFPA-aligned annual Line Isolation Monitor (LIM) testing and isolated power system field service for all brands and models, with flexible scheduling including evenings and weekends. Facilities receive a comprehensive test report noting observations, measured data, and recommended next steps to support inspection readiness.
NFPA-99 Line Isolation Monitor Testing (LIM) is vital to ensuring that Isolated Power Systems reliably perform their patient protection and fault monitoring role. NFPA 99, paragraph 6.3.4.1.4 requires that all Line Isolation Monitors (LIMs) be tested and documented at least every 12 months (every 1 month for older analog designs). LIMs must also be tested after any “repair or renovation” to the system using external fault loads (paragraph 6.3.4.1.5).
What's included in PG LifeLink Annual Testing
Our field service technicians verify key performance and compliance checks, including:
- Line Isolation Monitor function and alarm operation (audible/visual)
- Hazard current indication and system isolation checks
- Applied fault simulation where required after modifications (per NFPA guidance)
- Verification of grounding and a sample of receptacle checks
- Documentation for audit and inspection records
- On-site training support for facility teams
Testing Details
- Measurement of system voltages
- LIM test function operation (NFPA 99 6.3.4.1.4)
- Verification of LIM alarm point calibration (NFPA 99 6.3.2.6.3.2)
- Simulated 5 mA fault tests (L1-to-ground and L2-to-ground)
- Remote annunciator operation (if present)
- Measurement of Total Hazard Current (THC) and calculation of line-to-ground impedance
- Touch voltage measurement in the patient care vicinity
- Grounding impedance measurement between the room reference and the IPS receptacles
- Written report including test data and recommendations (repairs/upgrades if appropriate)
Want the full test scope? View our Annual Testing Service Scope
Service Capabilities
- Annual LIM Testing
- Commissioning
- Post-renovation testing
- Multi-year contracts
- Retrofits & upgrades
- Training & documentation
Schedule Annual LIM Testing
- Flexible scheduling: Evenings and weekends available
- Multi-year testing contracts available
NFPA Minimum vs Comprehensive Annual Testing
NFPA minimum testing can be performed internally but typically provides limited insight into overall system health. PG LifeLink’s annual testing is designed to deliver measurable data and documentation that support reliability planning and inspection readiness.
Line Isolation Monitor Testing
Testing to cover the NFPA requirements can be performed internally by facility personnel. This type of testing provides minimal information about the health of the system. However, these basic tests do not provide the type of data necessary to spot trends and ensure that system reliability is not compromised in the future.
PG LifeLink offers one year or multi-year Isolated Power Panel & Line Isolation Monitor Testing Contracts. The testing completed by our Field Service Technicians far surpasses the minimal requirements to remain compliant for NFPA and Joint Commission audits. Our Field Service Technicians are factory trained to thoroughly test the entire Isolated Power Panel and associated electrical components in operating rooms and other wet procedure locations.
Nationwide Coverage With a Travel Guarantee
PG LifeLink supports facilities nationwide with one of the industry’s largest networks of factory-certified technicians. If a local technician is not available in your area, we will dispatch a technician to your facility, helping ensure testing can be completed even in remote locations.
Flexible scheduling is available—including evenings and weekends—based on technician availability.
Line Isolation Maintenance and Training
While on-site, Technicians also offer training for clinical and facility maintenance staff on the proper use and maintenance of Isolated Power Systems. After completion of testing, PG LifeLink provides the facility owner a comprehensive report with critical information about the health of the systems and recommendations on any required repairs.
- Eligible PG LifeLink equipment may qualify for a free yearly extension of the standard product warranty, provided an active Testing Contract is maintained.
- Typically, a facility experiencing difficulties with a LIM is responsible not only for replacement of that LIM but also the labor and re-testing of the panel if it is not covered under warranty.
- Annual testing reduces the risk of operating room downtime.
Scheduling & Documentation Timeline
- Schedule in advance: Services should be scheduled at least 20 business days in advance, subject to technician availability.
- Expedited requests: Short-notice requests may be possible based on technician availability; an expedite fee (minimum 20%) may apply
- Service hours: Our standard service hours are 7:00 AM to 6:00 PM local time. If you need work done outside these hours, we can arrange it; just note that additional fees may apply.
- Documentation: You’ll receive a written report after testing is completed. If expedited reporting is needed, please request it before service is performed.
- Before we arrive: A valid purchase order, credit card, or payment arrangement must be complete before services are performed.
- Changes & cancellations: If your plans change, just give us at least 48 hours’ notice to avoid cancellation fees.
Service timing is subject to technician availability and may be affected by travel delays outside PG LifeLink’s control. For full details, see our Field Service Terms & Conditions.
Schedule Annual LIM Testing
- Flexible scheduling: Evenings and weekends available
- Multi-year testing contracts available
Why Choose PG LifeLink: One partner for isolated power systems across commissioning, annual testing, and upgrades backed by nationwide technician coverage and inspection ready documentation.
Lifecycle Support Beyond Annual Testing
Annual testing is one part of maintaining an isolated power system over the long term. PG LifeLink supports the full lifecycle so facility teams don’t have to coordinate multiple vendors for commissioning, testing, upgrades, and ongoing maintenance.
What this means for your facility:
- Single service partner: system engineering support, commissioning, annual LIM testing, recertification, and retrofit planning
- Consistent approach across brands: testing and documentation for all brands and models, including legacy systems installed in the 1970s and beyond
- Nationwide technician coverage: factory-certified technician network with a travel guarantee when local resources aren’t available
- Inspection-ready documentation: measured data, clear reporting, and recommended next steps when issues are identified
- Predictable planning: multi-year annual testing contracts to standardize schedules and reduce administrative effort
For facilities managing aging infrastructure, renovations, or procedure room expansions, this approach helps keep testing consistent and documentation ready.
FAQ
NFPA 99 requires testing at least every 12 months for digital systems and monthly for older analog designs.
Yes. PG LifeLink technicians are trained to test isolated power systems across all major brands and models, and provide consistent documentation regardless of manufacturer. Including legacy and obsolete systems installed decades ago.
During annual testing, PG LifeLink Field Service Technicians inspect and test isolated power equipment in accordance with the most recent edition of NFPA 99 and NFPA 70 (NEC Article 517), as well as manufacturer preventative maintenance guidelines. Standard service includes measurement of system voltages, LIM test function and alarm calibration verification, simulated 5 mA faults (L1-to-ground and L2-to-ground), remote annunciator testing (if present), measurement of Total Hazard Current (THC), and measurements related to touch voltage and grounding impedance. Facilities receive a written report with test data and recommendations for repairs or upgrades if appropriate. Standard service includes:
- Measurement of system voltages
- Operation of the LIM test function (NFPA 99 6.3.4.1.4)
- Verification of LIM alarm point calibration (NFPA 99 6.3.2.6.3.2)
- Simulated 5 mA fault on L1-to-ground and L2-to-ground (NFPA 99 6.3.3.3.2.1)
- Remote annunciator operation (if present) (NFPA 99 6.3.2.6.3.4)
- Measurement of Total Hazard Current (THC) and calculation of line-to-ground impedance
- Measurement of touch voltage in the patient care vicinity (NFPA 99 6.3.3.1.3)
- Measurement of grounding impedance between room reference and IPS receptacles (NFPA 99 6.3.3.1.4)
Services should be scheduled a minimum of 20 business days in advance, subject to technician availability. If service is requested with less than 20 business days’ notice, an expedite fee may apply.
Yes. Evening, weekend, and holiday scheduling may be available to reduce disruption, though additional fees may apply for service outside standard hours (7:00 AM–6:00 PM local time), on weekends, or on holidays.
Facilities receive a written report that includes test data, observations, and recommendations for repairs or upgrades if appropriate. This documentation is designed to support internal maintenance planning and inspection readiness. View a sample report here.
If issues are identified, findings are documented in the written report along with recommended next steps. Depending on the finding, PG LifeLink can provide guidance and quotes for repairs, replacements, or upgrades where appropriate.
Yes. PG LifeLink offers one-year and multi-year annual testing contracts to help facilities maintain consistent schedules and documentation year over year.
Eligible PG LifeLink equipment may qualify for a free extension of the standard warranty as long as an active Testing Contract is maintained. Warranty eligibility depends on the specific equipment and contract status.
Yes. NFPA 99 requires LIM testing after repairs, renovations, or modifications using external fault loads.
Learn more: Isolated Power Panel Testing Requirements
Product Downloads
- Annual Testing Service Scope
- Field Service Terms and Conditions
- Isolated Power Catalog
- Portsmouth Regional Hospital Case Study
- Sample Annual Testing Report