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10 

Specifications 

 
 

Cat. No.   

7435-00   

Model 

SK-5RAD-SP 

Elements

 

Dry Bulb 

Temperature 

Wet Bulb 

Temperature 

Relative 

Humidity 

Dew Point 

Temperature 

Absolute 
Humidity 

Display 

7 segment red LED 3 digits 

7 segment 

red LED 

2 digits 

Measuring Range 

0 to 50.0°C 

--- 

Operation Range 

--- 

0 to 99.9%rh 

-40 to 50.0°C 

0 to 83g/m³ 

Resolution 

0.1°C 

0.1%rh 

-40 to -10°C 

 

: 1°C 

-9.9 to 50°C 

 

: 0.1°C 

1g/m³ 

Measurement 

Accuracy 

within ±0.2% F.S. 

--- 

Operation Accuracy 

--- 

within ±0.01% 

Indication Accuracy 

0.2% F.S. ±1 digit 

1% ±1 digit 

0.1°C ±1 digit 

within 1% 

Sampling Time 

about 3 seconds 

Detective Sensors 

Pt100 

--- 

Output 

0 to 50°C /   

0 to 1VDC 

--- 

0 to 100% /   

0 to 1VDC 

--- 

Output Impedance 

500

Ω 

--- 

500

Ω 

--- 

Air-flow Speed 

more than 3m/s at an outlet 

or air-flow 

--- 

Operating Ambient 

Temperature 

: 0 to 50°C (no freezing of wet bulb)   

Humidity 

: less than 85% (no condensing) 

Power Requirements 

100VAC ±10% 50/60Hz 

Power Consumption 

100mA 

Outer Dimensions 

Display unit 

: 311 (W) × 192.5(H) × 144 (D) mm 

Sensor unit 

: 80 (W) × 264 (H) × 110 (D) mm 

Weight 

Display unit: about 4.5kg 

Sensor unit: about 1.5kg (including the cable) 

Standard Accessories 

Power cable (2 m), wicks (20 pcs.), water supply bottle, exclusive stand, test 
result 

Summary of Contents for 7435-00

Page 1: ...Instruction Manual for No 7435 00 Multiple Measuring System Model SK 5RAD SP No 3 Nishi Fukudacho Kanda Chiyodaku Tokyo 101 0037 Japan URL http www sksato co jp english 02 07 ...

Page 2: ...ed 2 Easy to read bright digital display The large display makes the values easy to read and the data values can be checked even from a distance 3 No deterioration with time The instrument will not deteriorate with time since it is not influenced by ambient gases for measurement 4 Provides outputs Data for dry bulb temperature and relative humidity can be taken in analog voltage 0 to 1VDC Its appl...

Page 3: ...1 Display Unit Front view Rear view 2 Sensor Unit 1 Display section 6 Fuse 2A 2 Case 7 Power switch 3 Control knob 8 Terminal for analog output temperature 4 Stand handle 9 Terminal for analog output R H 5 Connector for AC line 10 Receptacle for the sensor cable 11 Hanging ring 17 Air intake tube for dry bulb 12 Connection cable 18 Air intake tube for wet bulb upper part 13 PT sensor inside of int...

Page 4: ...s check the respective output terminals Never apply a voltage to the output terminals 4 Fastening of the sensor unit Mount the unit by using either the stand or the hanging ring on the top The unit may also be suspended from a tripod option NB Do not hold the unit in your hands while measuring 5 Placing the display unit The display unit is designed to be installed anywhere It can be carried hung f...

Page 5: ...gainst the change of circumstances However there may be delay in time against the sudden change of circumstances e Sampling time is three seconds Each value on the display will change every 3 seconds f Be sure to place power switch in OFF position when measurement is suspended or over 8 Connecting analog outputs with other instruments a Connection Analog outputs for temperature and humidity can be...

Page 6: ...5 c Application of data output Continuous measurement of recording is possible in connecting with the recorder Recorder 10m humidity 0 to 1VDC temperature 0 to 1VDC Connection cable ...

Page 7: ... housing and air intake tube between the clamp and air intake tube or in the grooves Join the upper and lower sections of the air intake tube and lock with the clamp N B Carefully connect the clamp tabs with the groove on the upper part of the air intake tube f Reattach the water reservoir to the reservoir holder and place the string into the reservoir Air intake tube upper part Groove for clamp A...

Page 8: ... bulb and wind the gauze around the sensing part without making wrinkles d Use cotton thread to tie the gauze firmly around the sensing part e Tie of the end of the gauze with another piece of tread The knot should be snug f Cut off the gauze about 2 or 3 mm beyond the end of the sensing part g Carefully pull out and remove the horizontal threads woofs of gauze above the hollow of the sensing part...

Page 9: ...bnormal Turn off power switch and turn on again There will be something wrong with the instrument if it is not restored Consult us Operation result of relative humidity has become more than 100 R H Wet bulb temperature is higher than dry bulb temperature Check with water level of feed water tank and check if wet bulb paper string contains water or not There is a possibility that this may occur in ...

Page 10: ...ent heat of evaporation of water at this time has a definite relation with vapor pressure and therefore relative humidity etc can be calculated by formula The instruments uses platinum resistance temperature detector which has stable accuracy for a long period of time for the temperature measurement of dry bulb and wet bulb and uses the latest CPU in its operation section to operate with high prec...

Page 11: ... 0 2 F S 1 digit 1 1 digit 0 1 C 1 digit within 1 Sampling Time about 3 seconds Detective Sensors Pt100 Output 0 to 50 C 0 to 1VDC 0 to 100 0 to 1VDC Output Impedance 500Ω 500Ω Air flow Speed more than 3m s at an outlet or air flow Operating Ambient Temperature 0 to 50 C no freezing of wet bulb Humidity less than 85 no condensing Power Requirements 100VAC 10 50 60Hz Power Consumption 100mA Outer D...

Page 12: ...No 3 Nishi Fukudacho Kanda Chiyodaku Tokyo 101 0037 Japan URL http www sksato co jp english ...

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