Campbell TempVue 10 User manual

Revision: 05/2023
Copyright ©2023
Campbell Scientific, Inc.
TempVue™10
PT-100 RTD Class A Precision Air
Temperature Sensor
PRODUCT MANUAL

Table of contents
1. Introduction 1
2. Precautions 1
3. Initial inspection 2
4. QuickStart 4
5. Overview 7
6. Specifications 8
7. Installation 9
7.1 Wiring 9
7.1.1 4-wire configuration 9
7.1.2 2-wire configuration 10
7.2 Programming 11
7.2.1 CRBasic programming 11
7.2.1.1 BrHalf4W() 12
7.2.1.2 BrHalf() 12
7.2.1.3 PRTCalc() 13
7.3 Siting 13
7.4 Installation in a radiation shield 15
7.5 Mount the shield 16
8. Operations 17
8.1 Sensor schematic 17
8.2 Reducing measurement noise 18
9. Maintenance, troubleshooting, and calibration 18
9.1 Maintenance 18
9.2 Troubleshooting 19
9.3 Calibration 19
10. References 20
Appendix A. Importing Short Cut code into CRBasic Editor 21
Appendix B. Example programs 22
Table of Contents - i

1. Introduction
The TempVue™10 represents the next generation of air-temperature measurement sensors,
meeting all relevant World Meteorological Organization (WMO1) temperature
recommendations.
Designed with the customer in mind, the TempVue10 easily interfaces with Campbell Scientific or
third-party data loggers and fits a wide range of passive solar radiation shields. The sensor comes
with a short, attached cable and terminates with an M12 connector, which provides exceptional
convenience, environmental protection, and data integrity for use in a variety of applications.
TempVue10 can be wired as a 2- or 4-wire PT-100 sensor, allowing full flexibility and
compatibility with your systems.
2. Precautions
lREAD AND UNDERSTAND the Safety section at the back of this manual.
lWhen opening the shipping package, do not damage or cut the cable jacket. If damage to
the cable is suspected, consult with a Campbell Scientific support engineer.
lAlthough rugged, the TempVue10 should be handled as a precision scientific instrument.
lDo not bend or damage the measurement tip of the TempVue10 because this can affect
the measurement quality and potentially damage the sensor.
lDo not modify or attempt to repair the TempVue10 unit without consulting Campbell
Scientific.
lThis temperature probe meets UKCA and EU declarations of conformity, citing
international standards applicable to the product.
lThe TempVue10 should not be buried in soil or submerged in water. Refer to
www.campbellsci.com/soil-temperature or www.campbellsci.com/water-temperature for a
list of sensors that are appropriate for soil, road surface, or water temperature applications.
1WMO, 2008. See References (p. 20).
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 1

3. Initial inspection
lUpon receipt of the TempVue10, inspect the packaging and contents for damage. File
damage claims with the shipping company.
lImmediately check package contents against the shipping documentation. Contact
Campbell Scientific about any discrepancies.
lThe calibration certificate shipped with each TempVue10 includes the device under test
(DUT) calibration offset (see Figure 3-1 [p. 2]). This value is unique for each sensor. Cross
check this serial number on the certificate against the serial number on your sensor to
ensure the given DUT offset corresponds to your sensor.
Figure 3-1. Example calibration certificate
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 2

lTable 3-1 (p. 3) shows the components typically shipped with the TempVue10.
Table 3-1: TempVue10 components
Component Quantity Description Image
TempVue10 1 Measures air temperature
Extension cable
(ordered as an
option)
1Connects the sensor to the
data logger
Quick deploy
guide 1Provides siting, mounting, and wiring information
Shield extender 1
Allows sensor to be housed
in a 10-plate or 14-plate
radiation shield.
Calibration
certificate 1Provides the DUT offset needed for programming.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 3

lFigure 3-2 (p. 4) shows the TempVue10 and shield extender in the shipping box.
Figure 3-2. Box containing the TempVue10 and shield extender.
lRefer to Installation in a radiation shield (p. 15) for instructions about attaching the extender
tube to the TempVue10 for use in longer radiation shields.
lAccessories and replacement parts are listed on the web site product page (see
https://www.campbellsci.com/tempvue10).
4. QuickStart
A video that describes data logger programming using Short Cut is available at:
www.campbellsci.com/videos/cr1000x-data logger-getting-started-program-part-3 .Short
Cut is an easy way to program your data logger to measure the sensor and assign data logger
wiring terminals. Short Cut is available as a download on www.campbellsci.com . It is included
in installations of LoggerNet,RTDAQ, and PC400.
The following procedure shows using Short Cut to program the TempVue10.
1. Open Short Cut and click Create New Program.
2. Double-click the data logger model.
3. In the Available Sensors and Devices box, type TempVue10. You can also locate the sensor
in the Sensors >Temperature folder. Double click the sensor model. Type the DUT offset
values provided in the calibration certificate that was shipped with the sensor. The
temperature defaults to degree C. This can be changed by clicking the Temperature box
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 4

and selecting one of the other options.
4. Click on the Wiring tab, wire the sensor, then click OK.
5. Repeat steps three and four for other sensors you want to measure. Click Next.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 5

6. In Output Setup, type the scan rate, a meaningful table name, and the Data Output Storage
Interval.
7. Select the measurement and its associated output option.
8. Click Finish and save the program. If the data logger is connected to the computer, send
the program just created to the data logger.
9. If the sensor is connected to the data logger, check the output of the sensor in the data
display in LoggerNet,RTDAQ, or PC400 to make sure it is making reasonable
measurements.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 6

5. Overview
The sensor consists of a wire-wrapped, four-wire Pt100 Resistance Temperature Detector (RTD)
element encapsulated in an epoxy-filled, stainless-steel housing. The thin yet robust housing,
combined with the Pt100 sensing element, provide the first true WMO-compliant sensor to meet
the 20-second step response time with an ambient wind speed of only 1 m/s (3.3 ft/s).
The TempVue10 has a maximum measurement uncertainty of only 0.3 °K over the entire
measurement range of -80 to +60 °C, with only 0.1 °K over the most common temperature range
of -40 to +40 °C.
When exposed to environments with high wind, sun, or precipitation levels, the TempVue10
must be housed in a radiation shield, such as the RAD06 6-plate shield.
Figure 5-1. TempVue10 with the cable attached
Features:
lMeets WMO step change response time at 1 m/s (3.28 ft/s)
lMaintains high measurement stability over both time and temperature
lIncredibly easy to install or remove for calibration checks
lHighly durable, providing sensor element protection in even the harshest environmental
conditions
lCan be wired with a 2-wire or 4-wire platinum resistance thermometer (PRT) configuration
lAllows for cable length adjustments without the need for calibration changes
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 7

lCompatible data loggers: GRANITE-series, CR6, CR1000X, CR800 series, CR350-series,
CR300-series. CR3000, CR1000
6. Specifications
Sensor description: 100 ohm Class A platinum (PT100)1
Measurement uncertainty2:±0.1 °K over –40 to +40 °C (-40 to +104 °F) range
±0.3 °K over –80 to +60 °C (-112° to +140 °F) range
Temperature measurement range: –80 to 60°C (-112 ° to +140 °F)
Time constant in air: 20 seconds to 63% of step change in 1m/s wind
Resolution: Three decimal places (0.001 °C)
Connector type: M12 (to extend beyond 1 m [3 ft] standard cable length)
Signal type/output: Analog
Probe diameter: 1.9 cm (0.75 in) maximum
Probe length: 12.1 cm (4.75 in) tip to end of cable gland
Extended probe length: 18.1 cm (7.125 in) tip to end of shield extender
Weight: 70 g (0.15 lb) for probe with shield extender, including
standard 1 m (3 ft) cable with M12 connector
Compliance: View documents at:
www.campbellsci.com/tempvue10
1Class A refers to ISO 60751:2008 class A standards and the corresponding ASTM E1137 Class A
standards.
2Kelvin is the SI unit (International System of Units) for temperature, and used for uncertainty
measurements, whereas the range of the product is in Celsius and therefore both are used in
these specifications. The WMO guide to Instruments and Observations, Guide no.8, also uses
both Kelvin and Celsius in their recommendation. Regarding resolution of the unit, 1 Kelvin = 1
°Celsius.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 8

7. Installation
If you are programming your data logger with Short Cut, skip Wiring (p. 9) and Programming (p.
11). Short Cut does this work for you. See QuickStart (p. 4), for a Short Cut tutorial.
This section discusses the following.
7.1 Wiring 9
7.2 Programming 11
7.3 Siting 13
7.4 Installation in a radiation shield 15
7.5 Mount the shield 16
7.1 Wiring
The TempVue10 includes a completion resistor integrated in the sensor housing, allowing the
sensor to directly connect to the data logger without using a bridge module, such as the
4WPB100 or 3WHB10K. Campbell Scientific offers extension cables in lengths up to 10 m, which
connect to the TempVue10 M12 connector. Contact Campbell Scientific if a longer cable is
required.
The TempVue10 can be wired as a 2- or 4-wire configuration. The 4-wire PRT measurement is
the preferred wiring choice, as this provides the highest measurement accuracy and ensures the
best quality signal. All TempVue10 sensors have been calibrated using a 4-wire configuration.
Where possible, Campbell Scientific strongly recommends using the 4-wire set up. The
specifications are all based on 4-wire operation and the TempVue10 will meet or exceed WMO
recommendations in this configuration. The 2-wire configuration requires fewer terminals, but
reduces the measurement quality and increases error.
Data logger connections for these configurations are provided in the following sections.
7.1.1 4-wire configuration
For this configuration, the TempVue10 probe requires two consecutive differential terminals and
one voltage excitation terminal (one excitation terminal can be used for two probes). If the yellow
and blue wires connect to Diff 1H and 1L, respectively, then the orange and purple wires should
connect to Diff 2H and 2L, respectively.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 9

Connections to Campbell Scientific data loggers are provided in Table 7-1 (p. 10). When Short Cut
software is used to create the data logger program, wire the sensor to the terminals shown on
the wiring diagram created by Short Cut.
Table 7-1: Wire color, function, and data logger connection for 4-wire configuration
Color Wire function Data logger connection
Yellow RTD signal/–
RTD
DIFF H (differential high, analog-voltage input) or CR6 U
terminal configured for differential high analog input1
Blue RTD signal ref DIFF L (differential low, analog-voltage input) or CR6 Uterminal
configured for differential low analog input1
Orange Sense signal DIFF H (differential high, analog-voltage input) or CR6 U
terminal configured for differential high analog input1
Purple Sense signal
ref
DIFF L (differential low, analog-voltage input) or CR6 Uterminal
configured for differential low analog input1
Brown Volt excite/+
RTD
VX (voltage excitation), EX (voltage excitation), or CR6 U
terminal configured for voltage excitation1
Black Excitation
reference ⏚(analog ground)
Clear Shield G ⏚(earth ground)
1Uterminals are automatically configured by the measurement instruction.
The white and gray wires are not used.
7.1.2 2-wire configuration
For this configuration, the TempVue10 probe requires one single-ended terminal and one
voltage excitation terminal (one excitation terminal can be used for two probes). The 2-wire PRT
measurement is a secondary wiring option, with decreased measurement quality. This setup
reduces the number of terminals needed on the data logger; however, for best measurement
practice use the 4-wire set up.
The calibration supplied by Campbell Scientific is valid only for the 4-wire set up. It is
recommended to obtain a new TempVue10 calibration offset from a third-party accredited
laboratory to use in the data logger program. Additionally, it is important to use the correct AC
noise rejection or signal integration frequency in the CRBasic program measurement parameter.
Connections to Campbell Scientific data loggers are given in Table 7-2 (p. 11).
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 10

Table 7-2: Wire color, function, and data logger connection for 2-wire configuration
Color Wire function Data logger connection
Orange RTD signal/–
RTD
SE (single-ended, analog-voltage input) or CR6 Uterminal
configured for single-ended analog input1
Brown Volt excite/+
RTD
VX (voltage excitation), EX (voltage excitation), or CR6 U
terminal configured for voltage excitation1
Black Excitation
reference ⏚(analog ground)
Clear Shield G ⏚(analog ground)
1Uterminals are automatically configured by the measurement instruction.
The yellow, purple, blue, white, and gray wires are not used.
7.2 Programming
Short Cut is the best source for up-to-date programming code for Campbell Scientific data
loggers. If your data acquisition requirements are simple, you can probably create and maintain a
data logger program exclusively with Short Cut. If your data acquisition needs are more complex,
the files that Short Cut creates are a great source for programming code to start a new program
or add to an existing custom program.
NOTE:
Short Cut cannot edit programs after they are imported and edited in CRBasic Editor.
AShort Cut tutorial is available in QuickStart (p. 4). If you wish to import Short Cut code into
CRBasic Editor to create or add to a customized program, follow the procedure in Importing
Short Cut code into CRBasic Editor (p. 21). Programming basics for CRBasic data loggers are
provided in the following sections.
7.2.1 CRBasic programming
The CRBasic program needs to measure the resistance and then convert the resistance
measurement to a temperature measurement. The CRBasic instruction used to measure the
resistance depends on whether it is a 4-wire or 2-wire configuration. The PRTCalc() instruction
is used to convert the resistance to a temperature measurement. The CRBasic instructions are
described in the following sections. Complete program examples can be found in Example
programs (p. 22).
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 11

7.2.1.1 BrHalf4W()
The BrHalf4W() CRBasic instruction is used to measure the TempVue10 in a 4-wire
configuration. It applies an excitation voltage and makes two differential voltage measurements.
The first measurement is made across the fixed resistor (Rf), the second is made across the RTD
(Rs). The result is the ratio of the two resistances (Rs/Rf), which is not affected by cable length.
The BrHalf4W() instruction has the following form:
BrHalf4W(Dest, Reps, Range1, Range2, DiffChan, ExChan, MeasPEx, ExmV, RevEx,
RevDiff, SettlingTime, fN1, Mult, Offset)
Use the DUT value for the Offset. The DUT value is included on the calibration sheet and is
unique to each sensor. Campbell Scientific recommends using a 50000 µsec SettlingTime.
Refer to Reducing measurement noise (p. 18) if in electrically noisy environments.
7.2.1.2 BrHalf()
The BrHalf() CRBasic instruction is used to measure the 2-wire configuration. It applies an
excitation voltage, delays a specified amount of time, and then makes a single ended voltage
measurement.
The BrHalf() instruction has the following form:
BrHalf(Dest, Reps, Range, SEChan, ExChan, MeasPEx, EXmV, RevEx, SettlingTime, fN1,
Mult, Offset)
Campbell Scientific recommends using a 50000 µsec SettlingTime. For the Offset, use a
TempVue10 calibration from a third party accredited laboratory.
For the 2-wire configuration, before the resistance value is converted to temperature, the
CRBasic program needs to calculate the Rs/R0 ratio. To do this, include the following:
'Calculate the value of Rs
Rs = Rf*X/(1-X)
'Calculate the ratio of Rs/R0
TempVue10RsR0 = Rs/R0
Where,
Rf = 10100 (the resistance of Rf)
R0 = 100 (the resistance of the PRT at 0 °C)
X= the Dest variable that stores the BrHalf() measurement. Refer to CRBasic Example 2
(p. 24) for more information.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 12

7.2.1.3 PRTCalc()
The PRTCalc() instruction converts the Rs/R0 ratio to a temperature measurement. The
PRTCalc() instruction has the following form:
PRTCalc(Dest, Reps, Source, PRTType, Mult, Offset)
Use option 1 (IEC 60751:2008) for the PRTType.
Source is the Rs/R0 ratio. When using the BrHalf4W() instruction, this is the variable that
stores the BrHalf4W() measurement. When using the BrHalf() instruction, the CRBasic
program needs to calculate the Rs/R0 ratio (see BrHalf() [p. 12] and Example programs [p. 22] for
more information).
7.3 Siting
The TempVue10 is intended for air temperature measurements only. The general EPA guidance
for standard meteorological stations is to locate the sensor over an open, level area at least 9 m
(29.5 ft) in diameter. The surface should be covered by short grass or the natural earth surface
where grass does not grow. Sensors should be located at a distance of at least ten times the
height of any nearby obstruction and at least 30 m (98.4 ft) from large, paved areas. Sensors
should be protected from thermal radiation and adequately ventilated. Protect the filter at the
top of the sensor from exposure to liquid water.
Figure 7-1. Clearances
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 13

The sensor should be installed at a standard measurement height which varies depending on the
guides being used:
l1.5 m (4.92 ft) (AASC)
l1.25 to 2.0 m (4.1 to 6.5 ft) (WMO)
l2.0 m (6.5 ft) (EPA)
See References (p. 20) for a list of references that discuss temperature sensors.
When used in the field, the TempVue10 must be housed in a radiation shield. Compatible
radiation shields include the RAD06, RAD10E, and RAD14 unventilated radiation shields and the
TS100SS fan-aspirated radiation shield. The white color of these shields reflects solar radiation.
The unventilated radiation shields have a louvered construction that allows air to pass freely
though, thereby keeping the sensor at or near ambient temperature. The RAD06, RAD10E, and
RAD14 have a double-louvered design that offers improved sensor protection from insect
intrusion and driving rain and snow. In addition, compared to shields of a similar appearance, the
RAD shields have lower self-heating in bright sunlight combined with low wind speeds giving a
better measurement. The RAD shields attach to a crossarm, mast, or user-supplied pipe with a 2.5
to 5.3 cm (1.0 to 2.1 inch) outer diameter.
The Apogee Instruments aspirated TS100SS shield can also be used where minimal solar errors
and a fast speed of response is desired. It mounts on a crossarm or horizontal pipe (1-1/4 inch to
2 inch IPS).
Tools required for installing a radiation shield to a tripod or tower include:
ladjustable wrench (to suit 12 mm (1/2 in) nuts)
lsmall screwdriver provided with data logger
lsmall Phillips screwdriver
lUV-resistant cable ties
lsmall pair of diagonal-cutting pliers
ladjustable wrench with a minimum 50 mm (2 in) jaw size.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 14

7.4 Installation in a radiation shield
1. If using a 10- or 14-plate shield, attach the shield extender.
2. If using a RAD06, RAD10E, or RAD14 shield, loosen the nut on the entry gland at the bottom
of the shield.
3. Insert the sensor into the gland.
4. If using an unventilated shield, first tighten, by hand, the nut on the radiation shield gland
until the sensor is held firmly in place. Then use the large adjustable wrench to further
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 15

tighten the gland by 1/2 to 1 turn. Do not overtighten the nut as you risk damaging the
sensor body and also making service of the sensor more difficult in the future.
Figure 7-2. Cut away view shows TempVue10 insertion in a RAD shield
7.5 Mount the shield
1. Attach the radiation shield to the tripod mast, crossarm, or tower leg using the supplied
U-bolt or band clamp. See Figure 7-2 (p. 16).
2. Connect the cable to the sensor.
3. Route the cable to the data logger, and secure the cable to the mounting structure using
cable ties.
CAUTION:
Failure to secure the cable can lead to breakage of the wires due to fatigue caused by
blowing back and forth in the wind.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 16

8. Operations
8.1 Sensor schematic
Figure 8-1. TempVue10 4-wire schematic
Figure 8-2. TempVue10 2-wire schematic
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 17

8.2 Reducing measurement noise
Excess cable lengths may be prone to electrical noise. The cable should be long enough to form a
drip loop, which helps prevent water ingress into the data logger enclosure. However, excess
cable coiled in the enclosure should be avoided.
AC power lines, pumps, and motors can be the source of electrical noise. If the TempVue10
probe or data logger is located in an electrically noisy environment, the measurement should be
made with the 60 or 50Hz rejection options.
Offsets in the measurement circuitry may be reduced by reversing the differential analog inputs
(RevDiff).
9. Maintenance,
troubleshooting, and calibration
NOTE:
All factory repairs and recalibrations require a returned material authorization (RMA) and
completion of the “Statement of Product Cleanliness and Decontamination” form. Refer to
the Assistance page at the end of this manual for more information.
9.1 Maintenance
The TempVue10 requires minimal maintenance. Periodically check cabling for proper
connections, signs of damage, and possible moisture intrusion.
Check the radiation shield monthly to make sure it is free from dust and debris. To clean the
shield, first remove the sensor. Dismount the shield. Brush all loose dirt off. If more effort is
needed, use warm, soapy water and a soft cloth or brush to thoroughly clean the shield. Allow
the shield to dry before remounting.
Ensure the TempVue10 probe is clean and free of dirt or any soiling by wiping carefully with a lint
free cloth and warm soapy water.
TempVue10 PT-100 Class A, Precision Air Temperature Sensor 18