DY-LDY Cold Mirror Dew Point Apparatus

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[Product Introduction]

The principle of DY-LDY cold mirror dew point meter is based on the physical definition of dew point, and it is an internationally recognized standard of humidity measurement.The cold mirror dew point meter has the characteristics of high precision, no drift, long life and good repeatability.

The mirror of the cold mirror dew point meter has been gold-plated, and the photoelectric measuring chamber is made of materials with excellent corrosion resistance to ensure the accuracy of the measurement data and adapt to the harsh working conditions.

Range of application

As a standard instrument for humidity dew point detection, cold mirror dew point meter is widely used in metrology detection, scientific research, military aerospace, medicine, tobacco, industrial production and other fields.

[Technical indicators]

Technical index of dew point

Technical index of dew point

Measuring range: -20~+85℃@20℃

Refrigeration temperature difference: 45℃@20℃

Uncertainty: ±0.2℃

Separation rate: 0.01℃

Repeatability: ±0.05℃

Technical temperature index

Measuring range: -40~+90℃

Measurement: PT100 Class B 1/3 DIN B four-wire system

Uncertainty: ±0.1℃

Separation rate: 0.01℃

Repeatability: ±0.05℃

Instrument Technical Indicators

Operating environment of main machine: -25~+55℃, 0~95%RH

Display unit: T ambient temperature, DP dew point temperature, RH relative humidity, SH wet air specific humidity, AH absolute humidity, etc.

Output: Modbus RTU communication, USB communication

Sensor cable: 1.5m

Response time: Refrigeration speed ≤0.8℃/S + equalization time (usually 15s)

Sampling flow rate: 0.1~ 1NL /min

Power supply: 220ACV 50HZ

Schematic diagram of cold mirror dew point meter

Operation and Maintenance

Before starting the machine, please connect the power supply, dew point probe and temperature probe cable. After starting the machine, the initialization time will be about 5 minutes. After initialization, the measuring state will start.After use, directly turn off the power to health.

Press the up and down key to switch display parameters, short press Enter to switch display parameters above, long press Enter to Enter the DBC function, automatically clean the mirror.

Routine maintenance and precautions are as follows:

DBC (Automatic Cleaning Function) mode should be set to automatic mode (Manual mode should be set under normal conditions) in the case of more dust.

If contaminants are found in the mirror, distilled water or alcohol can be used to clean the surface of the mirror and optical lens to ensure the measurement accuracy.

Turn off the power supply before cleaning.Clean and air dry before starting the machine.

Main interface introduction

Top Left Status

The number represents the current refrigeration power percentage. When it reaches 100, it indicates that the upper refrigeration capacity has been reached

Cool: probe refrigeration,

The probe is heating

Blan: The dew point is in equilibrium

DBC: Mirror cleaning in progress

Below sidebar status

Max: Record the upper limit measurement for this parameter

MIN: Record the lower limit measurement value of this parameter

Shows the units represented by abbreviations as follows

T: Ambient temperature

Dp: Dew point temperature

Rh: Relative humidity

SH: Wet air humidity unit g/kg g/kg

AH: Absolute humidity unit g/m3 g/m3 m3

IH: Wet air enthalpy J /g joules /g

PW: Current water vapor pressure in air unit hPa