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Psychrometer M-34

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M-34 psychrometer Aspiration (M34, M 34, m-34, m34, m 34)

Psychrometers M-34 are designed to determine the relative humidity and air temperature.
Designation L82.044.000-01
Name and type of aspiration psychrometer M-34
OKP code 43 1116 9908 09
Technical data psychrometer M-34
Measuring range of relative humidity at a temperature of 5 ° C to 40 ° C, 10% to 100%
The range of temperature measurement from -25 ° C to 50 ° C.
Power must be supplied from an AC voltage (220 +22 -33) V at (50 ± 1) Hz.
Power, W, not more than 30.
Psychrometers error when measuring the relative humidity must be less than indicated in the table. 1.
 
Table 1
Air temperature, ° C
Relative humidity in%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Error,%
5 ° C
± 6%
±5,5%
±5,5%
± 4%
± 4%
±3,5%
±3,5%
± 2,5
±2,5%
±2,5%
10 ° C
± 5%
± 5%
± 4%
± 3%
± 3%
± 3%
± 3%
± 2%
± 2%
± 2%
20 ° C
± 4%
± 4%
± 3%
± 3%
± 3%
± 3%
± 2%
± 2%
± 2%
± 2%
30 ° C
± 3%
± 3%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
40 ° C
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
± 2%
 
The air flow rate (aspiration), m / s, for the aspiration psychrometer M-34 is 1.8.
Average life psychrometers must be at least 6 years.
The contents of non-ferrous metals M-34, r
Aluminum
D16 5.5
Brass
L63 469
LS59-1 81.97
Bronze
Br0F6 ,5-0, 15 1.44
Zinc
TSAM4-1 66.5
Dimensions and weight of M-34
Diameter, 105 mm
Length, 400 mm
Weight, kg, not more than 1.2
The principle of operation and the device psychrometers M-34
The work is based on the dependence of psychrometers temperature difference of dry and wet bulb temperature of the ambient humidity. Psychrometer consists of two identical mercury thermometers (GOST 112 - 78) contained in a special frame and aspiration head. Socket is oboe tube bifurcates down and cover strips. The lower part of the bifurcated tube with plastic sleeves attached two pipes that are radiation protection tanks thermometers. The upper end of the tube is connected to an aspirator. Aspiration head consists of a winding mechanism and the fan, closed cap. Spring winding mechanism psychrometer M-34 starts the motor.
When rotating the fan aspiration psychrometers M-34 draws in air, which flows around the tank thermometers vozduhoprovodnoy passes through the pipe to the fan and the air out through the slits in the aspiration head. Dry bulb thermometer will indicate the temperature of the air, and the wet bulb will be lower due to the cooling caused by the evaporation of water from the surface of the lawn, form-fitting tank thermometer. To determine the moisture content on the testimony of the dry and wet bulb M-34 use psychrometric table.

Photos Psychrometer M-34

M-34 device image.
M-34 device image.


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