4. Switch the toggle switch "power" to the lower position.
5. Open the protective cover from the front panel of optical unit.
6.5.1 The Order of Measurement
After switching the toggle switch “power” three digits and two commas are
lightning The instrument is to heated during 5–15 m for stabilizing regime of
thermostat (disappearing of the second comma at lightning digit panel is the signal
of the operative regime).
The optical unit is to be positioned at operational place (move the platform with
the optical unit to the place, which is above the surface point with the desired
temperature). After 2 s the light indicators demonstrate the water surface temperature (
C).
6.5.2 Testing the IR-Radiometer
During testing the laboratory glass mercury thermometer with the least graduation
0.1
C and scale limits 0–50
C is to be used as a reference thermometer.
Environmental conditions during testing:
- the air temperature
10–25
C
- the air relative humidity
50–70%
- the atmospheric pressure
96–104 kPa
- the power voltage
200–240 V
- the power frequency
50 Hz
or direct voltage
24–36 V
It is necessary heating the radiometer during 15 m after switching. The reference
surface is the special dish with fresh water. It is possible to use the outer blackbody
radiator for testing the signal dispersion.
6.5.3 The Calibration Procedure
1. To measure and memorize the temperature of the upper 2 cm layer of water with
continuous stirring in the dish. Take in mind that the time constant of the
laboratory thermometer is about 3 m.
2. To direct the optical unit to the interested surface and to continue stirring water.
3. To record the radiometer result.
58
6 Construction and Operation of the Automated One-Channel IR-Radiometer
5. Open the protective cover from the front panel of optical unit.
6.5.1 The Order of Measurement
After switching the toggle switch “power” three digits and two commas are
lightning The instrument is to heated during 5–15 m for stabilizing regime of
thermostat (disappearing of the second comma at lightning digit panel is the signal
of the operative regime).
The optical unit is to be positioned at operational place (move the platform with
the optical unit to the place, which is above the surface point with the desired
temperature). After 2 s the light indicators demonstrate the water surface temperature (
C).
6.5.2 Testing the IR-Radiometer
During testing the laboratory glass mercury thermometer with the least graduation
0.1
C and scale limits 0–50
C is to be used as a reference thermometer.
Environmental conditions during testing:
- the air temperature
10–25
C
- the air relative humidity
50–70%
- the atmospheric pressure
96–104 kPa
- the power voltage
200–240 V
- the power frequency
50 Hz
or direct voltage
24–36 V
It is necessary heating the radiometer during 15 m after switching. The reference
surface is the special dish with fresh water. It is possible to use the outer blackbody
radiator for testing the signal dispersion.
6.5.3 The Calibration Procedure
1. To measure and memorize the temperature of the upper 2 cm layer of water with
continuous stirring in the dish. Take in mind that the time constant of the
laboratory thermometer is about 3 m.
2. To direct the optical unit to the interested surface and to continue stirring water.
3. To record the radiometer result.
58
6 Construction and Operation of the Automated One-Channel IR-Radiometer