INSTRUCTION MANUAL
CS500 Temperature and
Relative Humidity Probe
Revision: 7/04
Copyright (c) 1995-2004
Campbell Scientific, Inc.
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. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is
limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option)
defective products. The customer shall assume all costs of removing,
reinstalling, and shipping defective products to CAMPBELL SCIENTIFIC,
INC. CAMPBELL SCIENTIFIC, INC. will return such products by surface
carrier prepaid. This warranty shall not apply to any CAMPBELL
SCIENTIFIC, INC. products which have been subjected to modification,
misuse, neglect, accidents of nature, or shipping damage. This warranty is in
lieu of all other warranties, expressed or implied, including warranties of
merchantability or fitness for a particular purpose. CAMPBELL SCIENTIFIC,
INC. is not liable for special, indirect, incidental, or consequential damages.
Products may not be returned without prior authorization. The following
contact information is for US and International customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs
for customers withi n their territories. Please visit www.campbe llsci.com to
determine which Campbell Scientific company serves your country. To obtain
a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone (435) 753-2342. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container.
CAMPBELL SCIENTIFIC's shipping address is:
CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784
CAMPBELL SCIENTIFIC, INC. does not accept collect calls.
CS500 Table of Contents
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1. General........................................................................1
2. Specifications .............................................................1
2.1 Temperature Sensor..................................................................................1
2.2 Relative Humidity Sensor.........................................................................2
3. Installation...................................................................2
4. Wiring ..........................................................................6
5. Example Programs .....................................................6
5.1 Example for CR1000................................................................................7
5.2 Example for CR10X.................................................................................7
6. Long Lead Lengths.....................................................8
7. Absolute Humidity......................................................9
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. CS500 Wiring.............................................................................................5
Tables
1. Datalogger Connections..............................................................................6
2. Calibration for Temperature.......................................................................6
3. Calibration for Relative Humidity...............................................................6
4. Wiring for CR1000 and CR10X Examples................................................. 7
5. CR10(X) Wiring for Example 1..................................................................9
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CS500 Temperature and Relative Humidity Probe
1. General
The CS500 Temperature and Relative Humidity probe contains a Platinum
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.
2. Specifications
Operating Temperature: -40°C to +60°C
Storage Temperature: -40°C to +80°C
Probe Length: 6.8 cm (2.66 in.)
Probe Body Diameter: 1.2 cm (0.47 in.)
Filter: 0.2 µm Teflon membran e
Filter Diameter: 1.2 cm (0.47 in.)
Housing Material: ABS Plastic
Power Consumption: < 2 mA
Supply Voltage: 7 to 28 VDC
Settling Time after power is switched on: 1 second
2.1 Temperature Sensor
Sensor: 1000 Ω PRT, DIN 43760B
Temperature Measurement Range: -40°C to +60°C
Temperature Output Signal range : 0 to 1.0 VDC
1
CS500 Temperature and Relative Humidity Probe
Temperature Accuracy:
1.6
1.2
0.8
0.4
o
( C)
0
-0.4
Error
-0.8
-1.2
-1.6
-20-40 0
2.2 Relative Humidity Sensor
Sensor: INTERCAP
Relative Humidity Measurement Range: 0 to 100% non-condensing
RH Output Signal Range: 0 to 1.0 VDC
Accuracy at 20°C
unspecified (0 to 10% Relative Humidity)
±3% RH (10 to 90% Relative Humidity)
±6% RH (90 to 100% Relative Humidity)
20 40 60
Temperature( C)
®
o
3. Installation
Temperature Dependence of Relative Humidity Measurement:
1.5
1.0
o
0.5
C
0
-0.5
( %RH/ )
-1.0
-1.5
Temperature Dependence
10 20 30 40 50 60 70 80 90 100
60 C
-40 C
RH (%)
o
o
Typical Long Term Stability: Better than 1% RH per year
Response Time (at 20°C, 90% response to a steep change in humidity):
15 seconds with membrane filter
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).
The 41003 10-Plate Radiation Shield (Figure 3) mounts to a CM6/CM10
tripod. The UT12VA 12-Plate Radiation Shield mounts to a UT10 or UT30
tower with the UT018 horizontal mounting arm.
2
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