The Woter ET99718 COD Analyzer manual provides setup, operation, calibration, and technical specifications for measuring chemical oxygen demand in water…
The Woter ET99718 is a COD analyzer that employs the potassium dichromate method with micro‑computer control, data storage, and multiple measurement ranges for water‑sample testing. It is designed for laboratory, environmental monitoring, and wastewater analysis applications.
The manual explains instrument setup, sample preparation, digestion procedures, zero‑calibration steps, and normal operation. It also lists technical specifications such as measurement range, accuracy, optical system, power requirements, and safety features. This manual is written in Chinese.
| Measurement range | 0 to 150 mg/L COD, 0 to 1500 mg/L COD, 0 to 15000 mg/L COD |
|---|---|
| Measurement accuracy | ±3% of reading |
| Optical system | LED, dual‑band wavelengths λ1=430nm, λ2=605nm |
| Data storage capacity | 16 groups of data |
| Power supply (handheld mode) | 1×9V battery with auto‑shutdown |
| Operating temperature range | 0 °C to 40 °C |
| Relative humidity range | 30 % to 90 % (no condensation) |
| Physical dimensions and weight | 190 × 110 × 55 mm, 400 g |
| Digestion capacity | Up to 25 samples simultaneously |
| Digestion temperature options | 70 °C, 100 °C, 120 °C, 150 °C |
| Digestion time options | 30 min, 60 min, 120 min, continuous heating |
| Heating power | 400 W |
| Power input | AC 230 V, 50‑60 Hz |
Open the photometer, perform zero calibration, then insert a reagent tube filled with deionized water; the COD value will be displayed.
The device can digest up to 25 samples simultaneously.
Four digestion temperature settings are available: 70 °C, 100 °C, 120 °C, and 150 °C.