Tongfang
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| Brand | Tongfang |
|---|---|
| Model | ZFS100 |
| Origin | Hebei, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Category | Domestic |
| Instrument Type | Water Bath Constant-Temperature Shaker |
| Timer Range | 0–120 min |
| Oscillation Frequency | 3000 cycles/min |
| Oscillation Amplitude | 6 mm |
| Temperature Control Range | 0–100 °C (with refrigeration) |
| Shelf Quantity | 1 |
| Measurement Principle | Potentiometric and Colorimetric Endpoint Detection via Acid Extraction + Neutralization Titration |
| Standards Compliance | GB/T 264–1983, GB/T 7599–1987, GB/T 258–1977 |
| Measurement Range | 0.001–1.000 mg KOH/g |
| Resolution | 0.0001 mg KOH/g |
| Accuracy | ±0.002 mg KOH/g (for acid number 0.001–0.100 mg KOH/g) |
| Data Storage | 500 test records |
| Interface | RS-232 |
| Power Supply | AC 220 V ±20%, 50 Hz ±10% |
| Operating Environment | 5–40 °C, ≤80% RH |
| Dimensions | 420 × 270 × 260 mm |
| Weight | ~9 kg |