User manual for the Optfull TM-7S online turbidity meter, covering installation, operation, calibration and maintenance.
The Optfull TM-7S is an online turbidity meter that uses surface‑scattering optics and an LED laser source to continuously monitor water quality without needing probe cleaning. It is suitable for drinking water, industrial process water and similar applications.
The manual provides safety warnings, detailed installation steps for the controller and sensor housing, operation instructions, calibration procedures (zero and standard), and routine maintenance guidelines such as cleaning intervals and component checks. This manual is written in Chinese.
| Measurement range | 0.000 NTU ~ 100.0 NTU; 0.0 NTU ~ 9999 NTU |
|---|---|
| Light source | 620‑630 nm LED laser |
| Accuracy | ±5 % of reading (0.0‑2000 NTU) or ±0.1 NTU, whichever is greater |
| Resolution | 0.1 NTU (0‑999.9 NTU), 1 NTU (1000‑9999 NTU) |
| Repeatability | ≤ ±1 % of reading |
| Initial response time | 20 seconds |
| Analog output | 4‑20 mA (adjustable within range) |
| Digital communication | RS‑485 Modbus (configurable address, baud rate, parity) |
| Power supply | 85‑264 VAC or 12 VDC or 24 VDC |
| Operating temperature / humidity | 0 °C ~ 50 °C, 5 % ~ 95 % RH (no condensation) |
| Sensor dimensions | 530 × 630 × 185 mm |
The instrument can be powered from 85‑264 VAC, or from 12 VDC or 24 VDC.
It measures from 0.000 NTU up to 100.0 NTU, and also from 0.0 NTU up to 9999 NTU with different resolutions.
The measurement cell should be cleaned every three months, or more frequently if required by operating conditions.