• Wideband AC/DC direct current comparator for DC measurement with very low thermoelectric potential influence
• DC energy measurement in class 0.05 or class 0.1; DC ripple measurement below 1 kHz
• Real-time charging curves U(t), I(t), P(t), E(t) displayed and recorded
• Built-in charge control guidance circuit, battery voltage simulator, BMS simulator, and CAN message acquisition
• 8-channel high-speed data acquisition synchronized with CAN messages
• R4 resistance simulation 420 Ω ~ 6800 Ω in 1 Ω steps; on-off switching of DC+, DC-, PE, S+, S-, CC1, CC2, A+, A- lines
• Insulation resistance simulation: input 0 V ~ 800 V, resistance 10 kΩ ~ 1 MΩ in 1 kΩ steps
• Battery simulator output 0 V ~ 1000 V
• No mechanical contacts in the current loop; overload at 2 times rated current for 5 s
• Calibration terminals; optional TK4960 DC charging electrical energy calibration adapter

• On-site metrology testing of DC fast chargers
• Interoperability and communication protocol conformance testing with BMS simulation
• Insulation fault simulation on the charger output
• Ripple and waveform analysis during charging
• Acceptance testing of new DC charging installations

• DCV ranges: 300 V, 750 V, 1000 V; accuracy ±(ppm of reading + ppm of range) 400 + 50 (Class 0.1), 200 + 25 (Class 0.05)
• DCV measurement range: 30 V~1150 V; ripple uncertainty (k = 2): 0.05%*RG, RMS; bandwidth ≤ 1 kHz
• DCI 5 A range (resolution 1 μA): accuracy ±(ppm of reading + ppm of range) 200 + 300 (Class 0.1), 100 + 150 (Class 0.05)
• DCI 10 A, 20 A, 50 A, 100 A, 250 A ranges: accuracy ±(ppm of reading + ppm of range) 400 + 100 (Class 0.1), 200 + 50 (Class 0.05)
• DCI measurement range: 0.5 A ~ 300 A; ripple uncertainty (k = 2): 0.05%*RG, RMS; bandwidth ≤ 1 kHz
• Power/electrical energy: ±0.1%*RD (Class 0.1), ±0.05%*RD (Class 0.05)
• Standard electrical energy pulse output: maximum frequency 60 kHz; pulse input: maximum frequency 100 kHz, level 0 ~ 5 V
• Temperature: -30 °C ~ 60 °C, accuracy 0.3 °C; clock: GPS clock timing, accuracy 1 s/d
• Power supply: EV charger, built-in lithium battery, 220 V commercial power; AC (220 ± 22) V, (50 ± 2) Hz; max. power 100 VA
• Communication: USB, LAN, WIFI with the computer; CAN-BUS with the charger and load
• Operating temperature: -25 °C~55 °C; storage temperature: -30 °C~70 °C; altitude < 3000 m
• Weight: about 21 kg; dimensions: 540 mm (W) × 410 mm (D) × 270 mm (H)

A DC fast charger can meter energy correctly and still fail in service because of a handshake problem, an insulation fault, or excessive ripple. Testing only the energy reading leaves those risks unchecked.

The TD1320 measures DC voltage and current through a wideband direct current comparator rather than a shunt, which keeps thermoelectric effects to a minimum. Alongside energy and ripple, it simulates the vehicle battery and BMS, records CAN messages on the same time base as voltage and current, and reproduces insulation and contact faults on the charging interface.

For load testing it pairs with the Tunkia TK4710 DC adjustable resistance load, and in the laboratory it is verified through the Tunkia TK4960 calibration adapter. For AC chargers, the companion model is the Tunkia TD1330.

The datasheet specifies a 220 V, 50 Hz supply and a dedicated charging connector, so AV-TEK reviews connector and power configuration with you for each site. See all EV charger testers and loads and Tunkia instruments.