Understanding the Calibration Range of DP Flow Transmitter
Calibration is a critical aspect of ensuring the accuracy and reliability of any measuring instrument, including differential pressure (DP) flow transmitters. These devices are commonly used in industrial processes to measure the flow rate of liquids and gases. Understanding the calibration range of a DP flow transmitter is essential for ensuring that it operates within its specified limits and provides accurate measurements.
The calibration range of a DP flow transmitter refers to the range of flow rates over which the device has been calibrated to provide accurate measurements. This range is typically specified by the manufacturer and is based on the design and performance characteristics of the transmitter. It is important to note that operating the transmitter outside of its calibration range can result in inaccurate measurements and potentially lead to process inefficiencies or safety hazards.
| Model No. | CIT-8800 Inductive Conductivity / Concentration Online Controller | |
| Measurement range | Conductivity | 0.00μS/cm ~ 2000mS/cm |
| Concentration | 1.NaOH，（0-15）% or（25-50）%； | |
| 2.HNO3（note the Corrosion resistance of the sensor）（0-25）% or（36-82）%； | ||
| 3.User-defined concentration curves. | ||
| TDS | 0.00ppm~1000ppt | |
| Temp. | （0.0 ~ 120.0）℃ | |
| Resolution | Conductivity | 0.01μS/cm |
| Concentration | 0.01% | |
| TDS | 0.01ppm | |
| Temp. | 0.1℃ | |
| Accuracy | Conductivity | 0μS/cm ~1000μS/cm ±10μS/cm |
| 1 mS/cm~500 mS/cm ±1.0% | ||
| 500mS/cm~2000 mS/cm ±1.0% | ||
| TDS | 1.5 level | |
| Temp. | ±0.5℃ | |
| Temp. compensation | element | Pt1000 |
| range | （0.0~120.0）℃ linear compensation | |
| （4~20）mA Current output | channels | Double channels |
| features | Isolated, adjustable, reversible, 4-20MA output, instruments/ transmitter mode. | |
| Loop resistance | 400Ω（Max），DC 24V | |
| Resolution | ±0.1mA | |
| Control contact | Channels | Triple channels |
| Contact | Photoelectric relay output | |
| Programmable | Programmable （ temperature 、conductivity/concentration/TDS、timing）output | |
| Features | Could set temperature、conductivity/concentration/TDS、 timing NO/NC/ PID selection | |
| Resistance load | 50mA（Max），AC/DC 30V（Max） | |
| Data communication | RS485,MODBUS protocol | |
| Power supply | DC 24V±4V | |
| Consumption | ＜5.5W | |
| Working environment | Temperature：（0~50）℃ Relative Humidity：≤85%RH(non- condensing ) | |
| Storage | Temperature：(-20~60)℃ Relative Humidity：≤85%RH(non- condensing) | |
| Protection level | IP65（with rear cover） | |
| Outline dimension | 96mm×96 mm×94mm (H×W×D) | |
| Hole dimension | 91mm×91mm(H×W) | |
| Installation | Panel mounted , fast installation | |
To ensure that a DP flow transmitter operates within its calibration range, regular calibration checks and adjustments may be necessary. This can be done using a calibration standard or reference device to compare the measurements of the transmitter against known values. If any discrepancies are found, adjustments can be made to bring the transmitter back into calibration.
It is also important to consider the effects of temperature and pressure on the calibration range of a DP flow transmitter. Changes in temperature can affect the performance of the transmitter and may require adjustments to maintain accuracy. Similarly, variations in pressure can impact the calibration range of the device, especially in applications where the flow rates are subject to fluctuations.
In some cases, it may be necessary to recalibrate a DP flow transmitter to account for changes in operating conditions or to verify its performance over time. This can be done by a qualified technician using specialized equipment and procedures to ensure that the transmitter meets the required accuracy standards.
| Model | EC-510 Intelligent conductivity meter |
| Range | 0-200/2000/4000/10000uS/cm |
| 0-18.25MΩ | |
| Accuracy | 1.5%(FS) |
| Temp. Comp. | Automatic temperature compensation |
| Oper. Temp. | Normal 0～50℃; High temp 0～120℃ |
| Sensor | C=0.01/0.02/0.1/1.0/10.0cm-1 |
| Display | LCD Screen |
| Communication | 4-20mA output/2-10V/1-5V/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 | 48×96×100mm(H×W×L) |
| Hole Size | 45×92mm(H×W) |
| Installation Mode | Embedded |
In conclusion, understanding the calibration range of a DP flow transmitter is essential for ensuring accurate and reliable measurements in industrial processes. By selecting a transmitter with a suitable calibration range, monitoring its performance, and conducting regular calibration checks, operators can maintain the accuracy of flow measurements and optimize process efficiency. Calibration is a critical aspect of maintaining the performance of DP flow transmitters and should be given due consideration in any industrial application.
