Meter test set

Data records

• The meter testing function compares the energy measured by the reference meter with the energy registered by the meter under test, counting the test meter's impulses with a sensor or by hand, and reports the deviation as a percentage together with whether it lies within the error limits. Source: ZERA category page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.error-computation
• Field equipment also verifies instrument transformer ratio and polarity at the site and measures the burden on the current transformer secondary; a burden tester instead applies a known extra burden and watches how much the secondary current falls, a large fall pointing to a transformer that under-registers at the meter. Source: Radian Research category page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.instrument-transformer-checks
• A portable test system combines the reference meter with an integrated current and voltage source, so that one device simulates loads where the site load is insufficient, measures harmonics, and shows actual values, vectors and curves on its display, with results stored for documentation software. Source: ZERA category page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.integrated-source
• A phantom current source synthesizes the test current while the voltage is taken from the service at the site, so the result does not depend on the load the customer happens to be drawing at the time. Source: Radian Research product page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.phantom-load
• A meter test set tests a revenue electricity meter by comparing the energy the meter registers with the energy measured by a built-in reference standard watthour meter of a higher accuracy class, under either a controlled test load or the actual load at the site. Source: ZERA category page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.purpose
• The reference standard built into the set is its measurement engine; its accuracy is checked in the field by a standards comparison against an external reference standard, and traceable calibration of the complete unit is done by a calibration service. Source: Radian Research product page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.reference-standard
• A meter site analyzer tests an installed meter in service under the customer's actual load through direct leads or clamp-on current probes, and verifies the current and voltage transformers and the wiring of the whole metering installation at the same time, showing the voltages and currents on a vector diagram. Source: Radian Research product page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.site-analyzer
• Tests are run at defined load points such as light load, full load and a lagging power factor, with optional demand and creep tests, and each result is stored with a time stamp, user and meter identity and a weighted average for upload to meter data management software. Source: Radian Research product page, web page edition. Verified 2026-10-27. Record instr.meter-test-set.test-points-and-records