The TD1210 integrates a DC~1MHz wideband constant current standard source, constant voltage standard source, DC ohmmeter, impedance tester, AC voltage standard meter, and other functions. It is applied for calibrating conventional leakage current meters, contact current testers, and medical leakage current testers, providing high accuracy and wide frequency coverage. Wideband Constant Current Source Range Optimal Resolution Frequency (Hz) Annual Measurement Uncertainty (k=2, %*RD + A) Max Burden (V) 500 A 1 nA DC 0.05 + 0.25 15 500 A 1 nA 10 F 40 0.12 + 0.4 10 500 A 1 nA 40 < F 1 k 0.06 + 0.2 10 500 A 1 nA 1 k < F 10 k 0.12 + 0.4 10 500 A 1 nA 10 k < F 100 k 0.2 + 1 10 500 A 1 nA 100 k < F 300 k 0.5 + 2.5 10 500 A 1 nA 300 k < F 1 M 1 + 4 10 5 mA 10 nA DC 0.05 + 2.5 30 5 mA 10 nA 10 F 40 0.12 + 4 30 5 mA 10 nA 40 < F 1 k 0.06 + 2 30 5 mA 10 nA 1 k < F 10 k 0.12 + 4 30 5 mA 10 nA 10 k < F 100 k 0.2 + 10 30 5 mA 10 nA 100 k < F 300 k 0.5 + 25 30 5 mA 10 nA 300 k < F 1 M 1 + 40 30 50 mA 0.1 mA DC 0.05 + 25 30 50 mA 0.1 mA 10 F 40 0.12 + 40 30 50 mA 0.1 mA 40 < F 1 k 0.06 + 20 30 50 mA 0.1 mA 1 k < F 10 k 0.12 + 40 30 50 mA 0.1 mA 10 k < F 100 k 0.2 + 100 30 50 mA 0.1 mA 100 k < F 300 k 0.5 + 250 30 50 mA 0.1 mA 300 k < F 1 M 1 + 400 30 General Specifications Specification Details Power Supply AC (220 22) V, (50 2) Hz Temperature Performance Working: 0C ~ 45C; Storage: -20C ~ 70C Humidity Performance Working: < 80% @30C, <70% @40C, <40% @50C; Storage: 20%~80% RH, non-condensing Interface RS232 Key Features DC~1MHz wideband constant current standard source with high precision. Integrated constant voltage source, DC ohmmeter, impedance tester, and AC voltage standard meter. Supports conventional leakage current meters, contact current testers, and medical leakage current testers. High stability and low measurement uncertainty across wide frequency ranges. Compact and reliable design for on-site calibration and traceability work.