• Power/electric energy accuracy: DC class 0.01, AC class 0.02
• Voltage/current accuracy: DC class 0.005, AC class 0.01
• DC voltage measurement: 10 mV ~ 1150 V
• Direct DC current measurement: 10 μA ~ 120 A; transducer extends the current range to 500 A or more
• Small signal voltage measurement: 0.1 mV ~ 12 V
• Full automatic range switching for all quantities
• DC ripple and AC 2nd~63rd harmonic measurement
• Statistics and analysis of the measured quantities; standard electric energy pulse input and output
• Communication interface: USB, RS232, LAN

• Assessment of AC and DC energy meter verification devices, standard energy meters, and EV charger testers
• Verification or calibration of AC/DC voltage, current, and power sources
• Calibration of voltmeters, ammeters, ohmmeters, power meters, power factor meters, frequency meters, phase meters, transmitters, and sensors with a test power supply
• Shunt and I/V transformer calibration with a precision current transducer

• DC voltage measurement range: ± (10 mV～1150 V); AC measurement range: 10 mV～800 V (valid value); manual/automatic range switching
• DC voltage accuracy (k=2), 1 V to 1000 V ranges: 30 + 20 ppm*RD + ppm*RG
• Input bandwidth: 50 kHz; minimum resolution: 10 nV, 8-bit display; input impedance: 1 MΩ; input protection: 1200 Vpk
• Direct current measurement: 10 μA ~ 120 A (DC); 10 μA ~ 80 A (AC)
• Small signal voltage: 0.1 mV ~ 12 V (DC), 2 mV ~ 10.2 V (AC); overload up to 150 Vpk
• AC fundamental frequency: 40 Hz ~ 1 kHz; DC ripple range 1 Hz ~ 5 kHz; harmonics 2nd ~ 63rd
• Frequency: 40.00000 Hz～1000.000 Hz, accuracy 20 ppm; phase: 0.0000°～359.9999°, accuracy 0.02° (40 Hz ≤ F ≤ 200 Hz), 0.05° (200 Hz < F ≤ 1 kHz)
• Electric energy error display: resolution 0.001%
• Working temperature: 15 °C~35 °C; storage temperature: -10 °C~50 °C
• Working humidity: < 80% @ 30 °C, < 70% @ 40 °C, < 40% @ 50 °C; storage humidity: (20%~80%) RH, no condensation
• Interface: USB, RS232, RJ45

The test benches that verify energy meters drift like any other instrument. If they are not checked against a higher-level reference, every meter they pass carries that drift into the field.

The TD1310 measures AC and DC voltage, current, power, and energy as a reference meter, with DC voltage and current accuracy of class 0.005. It handles DC, AC, and DC+AC signals, analyzing ripple from 1 Hz to 5 kHz and harmonics up to the 63rd. Small-signal inputs from 0.1 mV let it assess verification devices for indirect connected DC energy meters, and a power calculation function scales readings through dividers, shunts, and transducers.

For DC-only work with ripple bandwidth up to 10 kHz, see the Tunkia TD1300; for the highest DC energy accuracy, the Tunkia TH3000. Compare models in DC power and energy standards.

AV-TEK helps you choose the reference level for your calibration chain. Explore more Tunkia instruments.