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1. High-brightness, ultra-clear 4.3-inch colour LCD display: Display resolution: 480×272 pixels, capable of displaying multiple parameters simultaneously.
2. Dual display: Displays direct-read test values alongside relative deviation (△%), ABS%, sorting results, insulation resistance, and leakage current in dual display mode.
3. Multiple trigger modes: Internal trigger, external trigger, foot switch, and interface trigger.
4. Calibration function: Full-range open-circuit zeroing function.
5. Four-level comparison function: Three levels pass, one level fail.
6. Comparator (sorting) function: Built-in with three sorting data levels, capable of performing HI/LOW judgment on the tested item.
Technical Specifications：
1、Screen: High brightness, ultra-clear 4.3-inch colour LCD display: Display pixels: 480*272.
2、Display range: Four-digit display of resistance value.
3、Test parameters: insulation resistance, microcurrent；
4、Range: Seven ranges, manual or automatic mode.
5、Basic accuracy: 10K-10T (I > 10nA ±2%, I < 10nA ±5%, I < 1nA ±10%)
6、Insulation resistance measurement range:
CH2683A: 10 kΩ to 10 TΩ; resolution: 0.1 × 103 Ω to 0.1 × 1013 Ω
CH2683B: 10 kΩ to 0.5 TΩ; resolution: 0.1 × 103 Ω to 0.1 × 1013 Ω
Resistivity: 1.0×103 to 1.0×1013 Ω-m; Resolution: 0.1×103 to 0.1×1013 Ω-m
7、Test voltage range: 0.5V to 1000V
8、Test speed: Fast: 12 times/second; Slow: 5 times/second.
9、Test end: 3-end shielding and external shielding ground end.
Product Model | CH2683A | CH2683B |
| Test Parameters | insulation resistance（IR）、 microcurrent（I） | insulation resistance（IR）、microcurrent（I） |
| Measuring Range | Resistance：10KΩ-10TΩ Current：0.01nA~1mA | Resistance：10KΩ-5TΩ Current：0.01nA~1mA |
| Current Accuracy | I＞10nA: ±2%I≤10nA: ±5%I≤1nA: ±10% | I＞10nA: ±2%I≤10nA: ±5%I≤1nA: ±10% |
| Resistance Accuracy | 10K-10T Calculated based on the accuracy of the current | |
| Voltage range | 0.5-1000V | 0.5-500V |
| Voltage accuracy | Voltage≥10V ±0.25%+0.5V Voltage＜10V ±1%+0.5V | Voltage≥10V ±0.25%+0.5V Voltage＜10V ±1%+0.5V |
| Readback voltage accuracy | ±0.25%+0.25V | ±0.25%+0.25V |
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