• Steady-state electric energy measurement accuracy class 0.01; dynamic electric energy measurement accuracy class 0.02
• DC output 100 V ~ 1150 V, 0.1 A ~ 300 A; AC output 220 V ± 20%, 10 mA ~ 80 A
• Dynamic waveforms with customizable rise time, fall time, duration, and power, in constant voltage, constant current, or combined variation mode
• Power accumulation register update rate: 10 ms per update (DC), 20 ms per update (AC)
• Energy measurement point at the charging gun head with compensation of charging cable resistance
• Supplied with China national standard DC and AC charging gun cables for direct connection to the testers under calibration
• Simultaneous calibration of a DC and an AC portable tester
• DC current channel switching between DC+ and DC- sampling
• Conventional standard meter terminals for calibrating AC and DC standard energy meters
• Large LCD touch screen and automatic test software

• Laboratory calibration of portable DC EV charger testers
• Laboratory calibration of portable AC EV charger testers
• Dynamic accuracy evaluation of testers under simulated charging profiles
• Calibration of conventional AC and DC standard energy meters

• DC voltage ranges 300 V, 750 V, 1000 V; DC current ranges 1 A, 2 A, 5 A, 10 A, 20 A, 50 A, 100 A, 250 A
• DC voltage/current measurement uncertainty (k=2): 30 + 20 (ppm*RD + ppm*RG); temperature coefficient @ (15~30) °C: 0.25 + 0.25 (ppm*RD + ppm*RG) /°C
• DC voltage output/measurement range: 100 V ～ 1150 V; current: 0.1 A ～ 300 A; 7 digit display
• DC power/energy (100 V ～ 1150 V), measurement uncertainty (k=2): 10 A ≤ I ≤ 300 A: 0.01%*RD steady-state, 0.02%*RD dynamic; 1 A ≤ I < 10 A: 0.01%*RD steady-state, 0.05%*RD dynamic
• Output power stability: 0.01% / 2 min
• Three-phase voltage: 220 V range, uncertainty 30 + 20; output/measurement range 220 V ± 20% (phase voltage)
• Three-phase current: 100 mA and 200 mA ranges 60 + 40; 500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, 60 A ranges 30 + 20 (ppm*RD + ppm*RG); output/measurement range 10 mA ～ 80 A
• AC power/energy (220 V ± 20%, power factor 1), measurement uncertainty (k=2): 1 A ≤ I ≤ 78 A: 0.01%*RD steady-state, 0.02%*RD dynamic; 10 mA ≤ I < 1 A: 0.01%*RD steady-state, 0.05%*RD dynamic
• Frequency: 45.00000 Hz ～ 65.00000 Hz, uncertainty 50 ppm*RD; phase: 0.0000° ～ 359.9999°, uncertainty 0.003°
• Standard energy pulse output: high-frequency full scale 60 kHz, low-frequency full scale 6 Hz; pulse input 5 V TTL, ≤ 150 kHz
• Electric energy error display: resolution 0.0001%
• Power supply: AC (220 ± 22) V, (50 ± 2) Hz; preheat time 30 minutes
• Operating temperature: 15 °C~35 °C; storage temperature: -10 °C~55 °C; altitude < 3000 m
• Communication interface: RS232, LAN

A portable EV charger tester is itself a measuring standard in the field, so its own accuracy has to be traceable. Calibrating it only at constant voltage and current says little about how it behaves while a vehicle is actually charging and the load keeps changing.

The TK4800 supports both steady-state measurement, by pulse method or accumulated energy at constant voltage and current, and dynamic measurement with adjustable trapezoidal and staircase waveforms. Its accumulation registers update every 10 ms for DC and 20 ms for AC, and the measurement point sits at the charging gun head with cable resistance compensated, so it matches where the tester and the charger measure.

It is supplied with China national standard (GB/T) DC and AC charging gun cables and can calibrate testers such as the Tunkia TD1320 and Tunkia TD1330. The same platform calibrates conventional AC and DC standard energy meters through standard terminals.

AV-TEK helps laboratories plan traceability for EV test equipment. Browse EV charger testers and loads and all Tunkia instruments.