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Campbell CS500 Instruction Manual

Temperature and relative humidity probe
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CS500 Temperature and
Relative Humidity Probe
Revision: 7/04
C o p y r i g h t
( c )
1 9 9 5 - 2 0 0 4
C a m p b e l l
S c i e n t i f i c ,
I n c .

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Summary of Contents for Campbell CS500

  • Page 1 CS500 Temperature and Relative Humidity Probe Revision: 7/04 C o p y r i g h t ( c ) 1 9 9 5 - 2 0 0 4 C a m p b e l l S c i e n t i f i c ,...
  • Page 2 Warranty and Assistance The CS500 TEMPERATURE AND RELATIVE HUMIDITY PROBE is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty.

  • Page 3: Table Of Contents

    8. Maintenance ..............11 9. References ..............11 Figures 1. CS500 and 41301 Radiation Shield on a CM6/CM10 Tripod Mast ...3 2. CS500 and 41303 Radiation Shield ............4 3. CS500 and 41003 Radiation Shield on a CM6/CM10 Tripod Mast ...4 4. Radiation Shield, CS500, and 41381 Adapter ..........5 5.
  • Page 4 This is a blank page.

  • Page 5: General

    Resistance Temperature detector (PRT) and a Vaisala INTERCAP® capacitive relative humidity sensor. The -L option on the model CS500 Temperature and Relative Humidity probe (CS500-L) indicates that the cable length is user specified. This manual refers to the sensor as the CS500.

  • Page 6: Relative Humidity Sensor

    15 seconds with membrane filter 3. Installation The CS500 must be housed inside a solar radiation shield when used in the field. The 41303 6-Plate Radiation Shield (Figure 1) mounts to a CM6/CM10 tripod or UT10 tower. The CS500 is held within the 41301 by a mounting clamp (Figure 2).
  • Page 7 CS500 Temperature and Relative Humidity Probe The CS500 is held in place, within the 41003 or UT12VA Radiation Shield, via an adapter, Model 41381. The 41381 adapter is threaded onto the bottom of the CS500 (Figure 4). The 41004 12-Plate Radiation Shield, used with 207 probes, can be converted to a 41002 with P/N 6638.
  • Page 8 CS500 Temperature and Relative Humidity Probe Mounting Clamp FIGURE 2. CS500 and 41303 Radiation Shield FIGURE 3. CS500 and 41003 Radiation Shield on a CM6/CM10 Tripod Mast...

  • Page 9: Radiation Shield, Cs500, And 41381 Adapter

    Tripod Mast 41003 10-Plate Radiation Shield Lock nut tightens against adapter CS500 Internal threads secure the CS500 to adapter 41381 Adapter FIGURE 4. Radiation Shield, CS500, and 41381 Adapter Black Temperature Signal Brown Relative Humidity Signal Green Signal & Power Reference...

  • Page 10: Wiring

    Scientific’s Short Cut Program Builder Software. You do not need to read this section to use Short Cut. The temperature and relative humidity signals from the CS500 are measured using two single-ended analog measurements (Instruction 1). The probe output scale is 0 to 1000 millivolts for the temperature range of - 40°C to +60°C and for the relative humidity range of 0 to 100%.

  • Page 11: Example For Cr1000

    Public AirTC Public RH DataTable(Table1,True,-1) DataInterval(0,60,Min,0) Average(1,AirTC,IEEE4,0) Sample(1,RH,IEEE4) EndTable BeginProg Scan(5,Sec,1,0) 'CS500 Temperature & Relative Humidity Sensor measurements AirTC and RH: VoltSE(AirTC,1,mV2500,1,0,0,_60Hz,0.1,-40.0) VoltSE(RH,1,mV2500,2,0,0,_60Hz,0.1,0) If (RH>100) And (RH<108) Then RH=100 CallTable(Table1) NextScan EndProg 5.2 Example for CR10X ;Measure the CS500 temperature.

  • Page 12: Long Lead Lengths

    Understanding the following details are not required for the general operation of the CS500 with Campbell Scientific’s dataloggers. The signal reference and the power ground (black) are the same lead in the CS500. When the CS500 temperature and relative humidity are measured, both the signal reference and power ground are connected to ground at the datalogger.

  • Page 13: Absolute Humidity

    0.35 ° C and 0.35% per 100 feet of cable length, respectively. 7. Absolute Humidity The CS500 measures the relative humidity. Relative humidity is defined by the equation below: ∗ where RH is the relative humidity, e is the vapor pressure in kPa , and e is the saturation vapor pressure in kPa.
  • Page 14 CS500 Temperature and Relative Humidity Probe Example 1. Sample CR10(X) Program that Computes Vapor Pressure and Saturation Vapor Pressure ;Measure the CS500 temperature. 01: Volt (SE) (P1) 1: 1 Reps 2: 5 2500 mV Slow Range ;CR500 (2500 mV); CR23X (1000 mV); 21X,...
  • Page 15 The filter can be rinsed gently in distilled water. If necessary, the chip can be removed and rinsed as well. Do not scratch the chip while cleaning. The offset and gain on the CS500 electronics can not be adjusted as part of a recalibration. Replace the RH chip as needed.
  • Page 16 CS500 Temperature and Relative Humidity Probe This is a blank page.
  • Page 17 This is a blank page.
  • Page 18 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za sales@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

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