Campbell PT100/3 User manual

PT100/3
1/3 DIN PRT
Probe
User Manual
Issued 14.6.10
Copyright ©1994, 2010 Campbell Scientific Ltd.
CSL146

Guarantee
This equipment is guaranteed against defects in materials and
workmanship. This guarantee applies for twelve months from date of
delivery. We will repair or replace products which prove to be defective
during the guarantee period provided they are returned to us prepaid. The
guarantee will not apply to:
xEquipment which has been modified or altered in any way without the
written permission of Campbell Scientific
xBatteries
xAny product which has been subjected to misuse, neglect, acts of God
or damage in transit.
Campbell Scientific will return guaranteed equipment by surface carrier
prepaid. Campbell Scientific will not reimburse the claimant for costs
incurred in removing and/or reinstalling equipment. This guarantee and the
Company’s obligation thereunder is in lieu of all other guarantees,
expressed or implied, including those of suitability and fitness for a
particular purpose. Campbell Scientific is not liable for consequential
damage.
Please inform us before returning equipment and obtain a Repair
Reference Number whether the repair is under guarantee or not. Please
state the faults as clearly as possible, and if the product is out of the
guarantee period it should be accompanied by a purchase order.
Quotations for repairs can be given on request.
When returning equipment, the Repair Reference Number must be clearly
marked on the outside of the package.
Note that goods sent air freight are subject to Customs clearance fees
which Campbell Scientific will charge to customers. In many cases, these
charges are greater than the cost of the repair.
Campbell Scientific Ltd,
Campbell Park, 80 Hathern Road,
Shepshed, Loughborough, LE12 9GX, UK
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.campbellsci.co.uk

PLEASE READ FIRST
About this manual
Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the
North American market. Some spellings, weights and measures may reflect this origin.
Some useful conversion factors:
Area: 1 in2(square inch) = 645 mm2
Length: 1 in. (inch) = 25.4 mm
1 ft (foot) = 304.8 mm
1 yard = 0.914 m
1 mile = 1.609 km
Mass: 1 oz. (ounce) = 28.35 g
1 lb (pound weight) = 0.454 kg
Pressure: 1 psi (lb/in2) = 68.95 mb
Volume: 1 UK pint = 568.3 ml
1 UK gallon = 4.546 litres
1 US gallon = 3.785 litres
In addition, while most of the information in the manual is correct for all countries, certain information
is specific to the North American market and so may not be applicable to European users.
Differences include the U.S standard external power supply details where some information (for
example the AC transformer input voltage) will not be applicable for British/European use. Please
note, however, that when a power supply adapter is ordered it will be suitable for use in your country.
Reference to some radio transmitters, digital cell phones and aerials may also not be applicable
according to your locality.
Some brackets, shields and enclosure options, including wiring, are not sold as standard items in the
European market; in some cases alternatives are offered. Details of the alternatives will be covered in
separate manuals.
Part numbers prefixed with a “#” symbol are special order parts for use with non-EU variants or for
special installations. Please quote the full part number with the # when ordering.
Recycling information
At the end of this product’s life it should not be put in commercial or domestic refuse
but sent for recycling. Any batteries contained within the product or used during the
products life should be removed from the product and also be sent to an appropriate
recycling facility.
Campbell Scientific Ltd can advise on the recycling of the equipment and in some cases
arrange collection and the correct disposal of it, although charges may apply for some
items or territories.
For further advice or support, please contact Campbell Scientific Ltd, or your local agent.
Campbell Scientific Ltd, Campbell Park, 80 Hathern Road, Shepshed, Loughborough, LE12 9GX, UK
Tel: [phone] Fax: [phone]
Email: [email protected]
www.campbellsci.co.uk

i
Contents
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1. Specifications..............................................................1
2. Installation....................................................................1
3. Programming...............................................................2
4. Calibration....................................................................2
Figure
1. Schematic of PT100/3 Probe......................................................................2

1
PT100/3 1/3 DIN PRT Probe
Platinum resistance thermometers are high-stability temperature measurement devices
suitable for very wide temperature ranges (-200ºC to +650ºC). The PT100/3 probe can be
used for both 3-wire half bridge and 4-wire half bridge measurements when used with the
appropriate Campbell Scientific Terminal Input Module (TIM).
1. Specifications
Element: 1/3 DIN (to IEC60751)
Typical PRT
Element Error: <±0.15ºC @ -100ºC
<±0.1ºC @ 0ºC
<±0.19ºC @ +100ºC
<±0.31ºC @ +200ºC
(excluding datalogger and bridge resistor accuracy)
Maximum temp.
of standard probe: +80ºC (see Note below)
Standard cable length: 3m
The operating temperature range for the probe is limited by the type
of cable and operating conditions. The PVC cable fitted to the
standard probe should not be used at temperatures above 80ºC. If
the cable is subject to flexing, the lower temperature limit is -20ºC.
However, if the cable is rigidly fixed, without the possibility of
flexing, the probe can be used in temperatures down to -50ºC.
Other cable types are available to special order to cover
temperatures in the range of -200ºC to +650ºC.
2. Installation
The probe can be connected in a 3-wire half bridge or a 4-wire half bridge
configuration. To accomplish this it should be used with the appropriate Campbell
Scientific Terminal Input Module (TIM) which contains the necessary completion
resistors and connects directly to the datalogger’s input terminals.
The 4-wire half bridge offers the best accuracy, and requires the 4WPB100
Terminal Input Module. This module contains both the 10kΩand the 100Ω
resistors needed. However, two differential (i.e. four single-ended) channels are
required on the datalogger for 4-wire half bridge measurements. One 4WPB100
module can be shared by several probes when used with an AM416 multiplexer.
The 3-wire half bridge only requires two single-ended channels on the datalogger,
and is used with the 3WHB10K Terminal Input Module, which contains the 10kΩ
resistor.
For more information about the installation and use of the TIMs, please refer to
the appropriate TIM manual.
NOTE

User Manual
2
Figure 1 Schematic of PT100/3 Probe
(two alternate colour schemes shown – depends on cable type)
3. Programming
Program examples for using a PRT with all types of Campbell Scientific
dataloggers are shown in the appropriate TIM manual. Additional examples are
also given in the individual datalogger manuals.
4. Calibration
The PT100/3 probe and its associated TIM can be used without any additional
calibration if that is appropriate to your field requirements. Note that the
calibration at 0ºC procedure described in the TIM manuals will remove offset
errors in the PRT element and in the 0.01% tolerance of the 10kΩcompletion
resistor. However, it will not remove any temperature coefficient error in the
bridge resistor in the 4-wire half bridge, nor any slope error inherent in the PT100
element.

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