Steps to Calibrate Hach turbidity meter
Calibrating a Hach turbidity meter is an essential step in ensuring accurate and reliable measurements of water clarity. Turbidity is a key parameter in water quality monitoring, as it indicates the presence of suspended particles that can affect the overall health of aquatic ecosystems. Proper calibration of the turbidity meter is crucial to obtaining precise readings that can be used for regulatory compliance, research, and other applications.
To calibrate a Hach turbidity meter, you will need a calibration kit that includes a set of standard turbidity solutions. These solutions have known turbidity values that are used to calibrate the meter and ensure its accuracy. Before starting the calibration process, it is important to check the condition of the turbidity meter and make sure that it is clean and free of any debris or residue that could affect the readings.
The first step in calibrating a Hach turbidity meter is to prepare the standard turbidity solutions according to the manufacturer’s instructions. These solutions are typically provided in sealed vials or bottles and should be handled carefully to avoid contamination. Once the solutions are prepared, they should be allowed to come to room temperature before use to ensure accurate readings.
| pH/ORP-3500 series pH/ORP Online Meter | |||
| pH | ORP | Temp. | |
| Measurement range | 0.00～14.00 | (-2000～+2000)mV | (0.0～99.9)℃（Temp. Compensation ：NTC10K) |
| Resolution | 0.01 | 1mV | 0.1℃ |
| Accuracy | ±0.1 | ±5mV（electronic unit） | ±0.5℃ |
| Buffer Solution | 9.18；6.86；4.01；10.00；7.00；4.00 | ||
| Medium Temp. | (0～50)℃（with 25℃ as standard ）manual / automatic temp.compensation for selection | ||
| Analog Output | Isolated one Channel（4～20）mA，Instrument / Transmitter for selection | ||
| Control Output | Double relay output（ON/OFF） | ||
| Consumption | <3W | ||
| Working Environment | Working temp. (0～50)℃；Relative humidity≤85%RH（none condensation） | ||
| Storage Environment | Temp. (-20～60)℃; Relative humidity≤85%RH（none condensation） | ||
| Dimension | 48mm×96mm×80mm (H×W×D) | ||
| Hole Size | 44mm×92mm (H×W) | ||
| Installation | Panel mounted ,fast installation | ||
Next, the turbidity meter should be turned on and allowed to warm up for a few minutes to stabilize the readings. Once the meter is ready, it should be placed in calibration mode, which can usually be done by pressing a button or following the on-screen instructions. The meter will prompt you to insert the first standard turbidity solution, which should be done carefully to avoid spills or air bubbles.
After inserting the first standard solution, the meter will display the turbidity value of the solution. This value should match the known turbidity value of the standard solution within a certain range, typically ±5%. If the reading is outside of this range, the meter may need to be recalibrated or serviced by a professional.
Once the first standard solution has been calibrated, the process should be repeated with the remaining standard solutions in the calibration kit. Each solution should be inserted carefully and the readings should be checked against the known turbidity values. If any discrepancies are found, adjustments may need to be made to the meter or the calibration process may need to be repeated.
| Model | pH/ORP-810 pH/orp meter |
| Range | 0-14 pH; -2000 – +2000mV |
| Accuracy | ±0.1pH; ±2mV |
| Temp. Comp. | Automatic temperature compensation |
| Oper. Temp. | Normal 0～50℃; High temp 0～100℃ |
| Sensor | pH double/triple sensor; ORP sensor |
| Display | LCD Screen |
| Communication | 4-20mA output/RS485 |
| Output | High/Low limit dual relay control |
| Power | AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A |
| Working Environment | Ambient temperature:0～50℃ |
| Relative humidity≤85% | |
| Dimensions | 96×96×100mm(H×W×L) |
| Hole Size | 92×92mm(H×W) |
| Installation Mode | Embedded |
After calibrating all of the standard solutions, the turbidity meter should be returned to normal operating mode and checked with a clean water sample to ensure that it is reading accurately. Regular calibration of the turbidity meter is important to maintain its accuracy and reliability over time, so it is recommended to calibrate the meter at least once a month or as needed based on the manufacturer’s guidelines.
In conclusion, calibrating a Hach turbidity meter is a straightforward process that can be done with a calibration kit and standard turbidity solutions. By following the manufacturer’s instructions and taking care to handle the solutions and meter properly, you can ensure accurate and reliable measurements of water clarity for a variety of applications. Regular calibration of the turbidity meter is essential to maintaining its accuracy and should be done on a regular basis to ensure consistent results.
