ASTM D1142 Dew Point For Gaseous Fuels

KN-1142 Dew Point Tester

Overview

KN-1142 Dew Point Tester conforms to ASTM D1142 Standard Test Method for Water Vapor Content of Gaseous Fuels by Measurement of Dew-Point Temperature and ASTM D5454 Standard Test Method for Water Vapor Content of Gaseous Fuels Using Electronic Moisture Analyzers. Generally, contracts governing the pipeline transmission of natural gas contain specifications limiting the maximum concentration of water vapor allowed. Excess water vapor can cause corrosive conditions, degrading pipelines and equipment. It can also condense and freeze or form methane hydrates causing blockages. Water-vapor content also affects the heating value of natural gas, thus influencing the quality of the gas.

Features

1. 220VAC or USB power supply (5V 2A)

2. The main screen interface records the maximum value MAX and minimum value MIN of each parameter measurement

3. The main screen interface has a time curve graph, which can display a variety of parameter curves in real time, and can set the data recording interval

4. The main screen interface displays three sets of parameters at the same time, and displays the maximum and minimum values of each parameter at the same time

5. The main machine has DBC mirror automatic cleaning function and automatic balance system, and has the function of forced frosting

6. The main machine and probe are designed separately to avoid the fluctuation of the temperature and humidity environment in the box affected by the pumping mode

7. The host interface is able to do calibration and correction

8. The host can be connected to the computer for communication

9. Good long-term stability and repeatability

Technical parameters

1. Dew point probe

• Measuring range: -40~+90°C

• Accuracy: ±0.15°C (calibration range -10~+20°C)

• Resolution: 0.01°C

• Reproducibility: ±0.05°C

• Sensitivity: ±0.01°C

2. Temperature probe

• Measuring range: -40~+100°C

• Accuracy: ±0.05°C (calibration range: 5~+50°C)

• Resolution: 0.01°C

• Reproducibility: ±0.02°C

• Sensitivity: ±0.01°C

3. Instrument host index

• Main working environment: -10~+50°C, 10%~90%RH

• Output: Modbus RTU communication, USB communication

• Sensor cable: 2.0 m

• Response time: maximum cooling speed 0.8°C/s + equilibration time (usually 15s)

• Sampling gas flow rate: 0.1~0.7Nl/min

• Power supply: AC 100~220V 50Hz 35W or power bank USB 5V 10W

• Display: large color touch screen, Chinese and English interface optional, friendly and convenient man-machine operation

4. Measurable display unit:

• Ambient temperature

• Dew/frost point temperature

• Relative humidity

• Parts per million concentration

• Humid air is specific to humidity in g/kg g/kg

• Absolute humidity in g/m3 g/m3

• Enthalpy of moist air in j/g joules/gram

• Water vapor pressure in current air in hPa