Campbell CS225 User manual

Revision: 08/2021
Copyright © 2016 – 2021
Campbell Scientific
CSL I.D - 1136

Guarantee
This equipment is guaranteed against defects in materials and workmanship.
We will repair or replace products which prove to be defective during the
guarantee period as detailed on your invoice, provided they are returned to us
prepaid. The guarantee will not apply to:

Equipment which has been modified or altered in any way without the
written permission of Campbell Scientific

Batteries

Any 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. It is the policy of Campbell Scientific to protect the health of its
employees and provide a safe working environment, in support of this policy a
“Declaration of Hazardous Material and Decontamination” form will be
issued for completion.
When returning equipment, the Repair Reference Number must be clearly
marked on the outside of the package. Complete the “Declaration of
Hazardous Material and Decontamination” form and ensure a completed copy
is returned with your goods. Please note your Repair may not be processed if
you do not include a copy of this form and Campbell Scientific Ltd reserves
the right to return goods at the customers’ expense.
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,
80 Hathern Road,
Shepshed, Loughborough, LE12 9GX, UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
www.campbellsci.co.uk

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, 80 Hathern Road, Shepshed, Loughborough, LE12 9GX,
UK Tel: [phone] Fax: [phone]
Email: [e-mail]
www.campbellsci.co.uk

Safety
DANGER —MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON
OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS,
CROSSARMS, ENCLOSURES, ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE,
INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS, TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED
WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS INJURY, PROPERTY DAMAGE, AND
PRODUCT FAILURE. TAKE ALL REASONABLE PRECAUTIONS TO AVOID THESE HAZARDS. CHECK WITH YOUR
ORGANIZATION'S SAFETY COORDINATOR (OR POLICY) FOR PROCEDURES AND REQUIRED PROTECTIVE
EQUIPMENT PRIOR TO PERFORMING ANY WORK.
Use tripods, towers, and attachments to tripods and towers only for purposes for which they are designed. Do not
exceed design limits. Be familiar and comply with all instructions provided in product manuals. Manuals are
available at www.campbellsci.eu or by telephoning [phone] (UK). You are responsible for conformance
with governing codes and regulations, including safety regulations, and the integrity and location of structures or land
to which towers, tripods, and any attachments are attached. Installation sites should be evaluated and approved by a
qualified engineer. If questions or concerns arise regarding installation, use, or maintenance of tripods, towers,
attachments, or electrical connections, consult with a licensed and qualified engineer or electrician.
General
•Prior to performing site or installation work, obtain required approvals and permits. Comply with all
governing structure-height regulations, such as those of the FAA in the USA.
•Use only qualified personnel for installation, use, and maintenance of tripods and towers, and any
attachments to tripods and towers. The use of licensed and qualified contractors is highly recommended.
•Read all applicable instructions carefully and understand procedures thoroughly before beginning work.
•Wear a hardhat and eye protection, and take other appropriate safety precautions while working on or
around tripods and towers.
•Do not climb tripods or towers at any time, and prohibit climbing by other persons. Take reasonable
precautions to secure tripod and tower sites from trespassers.
•Use only manufacturer recommended parts, materials, and tools.
Utility and Electrical
•You can be killed or sustain serious bodily injury if the tripod, tower, or attachments you are installing,
constructing, using, or maintaining, or a tool, stake, or anchor, come in contact with overhead or
underground utility lines.
•Maintain a distance of at least one-and-one-half times structure height, or 20 feet, or the distance
required by applicable law, whichever is greater, between overhead utility lines and the structure (tripod,
tower, attachments, or tools).
•Prior to performing site or installation work, inform all utility companies and have all underground utilities
marked.
•Comply with all electrical codes. Electrical equipment and related grounding devices should be installed
by a licensed and qualified electrician.
Elevated Work and Weather
•Exercise extreme caution when performing elevated work.
•Use appropriate equipment and safety practices.
•During installation and maintenance, keep tower and tripod sites clear of un-trained or non-essential
personnel. Take precautions to prevent elevated tools and objects from dropping.
•Do not perform any work in inclement weather, including wind, rain, snow, lightning, etc.
Maintenance
•Periodically (at least yearly) check for wear and damage, including corrosion, stress cracks, frayed cables,
loose cable clamps, cable tightness, etc. and take necessary corrective actions.
•Periodically (at least yearly) check electrical ground connections.
WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL
SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER
INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS
SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

Table of contents
1. Introduction 1
2. Precautions 1
3. Initial inspection 2
4. QuickStart 2
5. Overview 6
6. Specifications 7
6.1 SGB3 3-line surge protector 7
7. Installation 8
7.1 Siting 8
7.2 Mounting 8
7.3 Wiring 9
7.4 Programming 10
7.4.1 SDI12Recorder() instruction 10
7.4.2 Slow sequence program instructions 10
8. Operation 11
8.1 Sensor measurements 11
8.1.1 SDI-12 addressing 12
8.1.2 Metadata 14
8.2 Long cables 14
8.3 Power conservation 15
8. Maintenance, calibration, and troubleshooting 15
Appendix A. Importing Short Cut code into CRBasic Editor 17
Appendix B. SDI-12 sensor support 18
B.1 SDI-12 command basics 18
B.1.1 Acknowledge active command (a!) 19
B.1.2 Send identification command (al!) 19
B.1.3 Start verification command (aV!) 20
B.1.4 Address query command (?!) 20
Table of Contents - i

B.1.5 Change address command (aAb!) 20
B.1.6 Start measurement commands (aM!) 20
B.1.7 Stopping a measurement command 21
B.1.8 Send data command (aD0! … aD9!) 21
B.1.9 Continuous measurement command (aR0! … aR9!) 22
B.2 SDI-12 transparent mode 22
B.2.1 Changing an SDI-12 address 22
B.3 References 25
Table of Contents - ii

1. Introduction
The CS225 Temperature String uses SDI-12 digital technology for simple integration and
reliability. The CS225 consists of an arrangement of temperature sensors mounted in rugged
steel reinforced cable. Temperature points are over moulded to provide long-term connection
in all mediums. Each CS225 is manufactured to the client’s specific requirements and includes
the SGB3 to provide electrical surge protection.
NOTE:
This manual provides information only for CRBasic data loggers. For retired Edlog data logger
support, see an older manual at www.campbellsci.com/old-manuals .
2. Precautions
lREAD AND UNDERSTAND the Safety section at the front of this manual.
lAlthough the CS225 is designed to be a rugged and reliable device for field use, care
should be taken when handling or moving it to avoid damage.
lThere are no user-serviceable parts and disassembling the device will void the warranty.
lThe black outer jacket of the cable is Santoprene® rubber. This compound was chosen for
its resistance to temperature extremes, moisture, and UV degradation. However, this jacket
will support combustion in air. It is rated as slow burning when tested according to U.L. 94
H.B. and will pass FMVSS302. Local fire codes may preclude its use inside buildings.
lCAUTION—Do not make tight bends near the temperature sensor(s). Doing so has the
potential to damage the sensor assembly. The minimum bend radius at any sensor location
is 15cm (6in). See following image.
CS225 Temperature String 1

3. Initial inspection
lUpon receipt of the CS225, inspect the packaging and contents for damage. File damage
claims with the shipping company.
lThe model number and cable length are printed on a label at the connection end of the
cable. Check this information against the shipping documents to ensure the expected
product and cable length were received.
4. QuickStart
A video that describes data logger programming using Short Cut is available at:
www.campbellsci.eu/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.eu. It is included
in installations of LoggerNet, RTDAQ, and PC400.
The following procedure also shows using Short Cut to program the CS225.
1. Open Short Cut and click Create New Program.
2. Double-click the data logger model.
CS225 Temperature String 2

3. In the Available Sensors and Devices box, type CS225 or locate the sensor in the Sensors >
Temperature folder. Double-click CS225 SDI-12 Temperature Profiler. Type the correct
Starting SDI-12 Address for the first sensor (SDI-12 addressing (p. 12)). Type the Number of
Result Sensors.
CS225 Temperature String 3

4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after
wiring the sensor.
5. Repeat steps 3 and 4 for other sensors.
CS225 Temperature String 4

6. In Output Setup, type the scan rate, meaningful table names, and Data Output Storage
Interval.
7. Select the measurement and its associated output option.
CS225 Temperature String 5

8. Click Finish and save the program. Send the program to the data logger if the data logger
is connected to the computer.
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.
5. Overview
The CS225 Temperature String uses digital sensor technology allowing for a simple three-wire
integration. The CS225 consists of an arrangement of over moulded temperature points
mounted in a rugged steel reinforced cable. Each CS225 is manufactured to the client’s specific
requirements.
The CS225 is suited to a wide variety of applications and environments that require temperature
profiling. The completely sealed cable assembly permits the CS225 to be buried, submerged, or
integrated directly into structures. Examples of applications include temperature profiling in
boreholes, soils, water, and frost and permafrost monitoring.
The SGB3 provides surge protection for the CS225 Temperature String. The SGB3 case can be
mounted to the backplate of a Campbell Scientific enclosure.
Features:
lAccurate and stable measurements
lEach sensor is individually addressed and referenced to its depth
lLow power consumption
lDigital SDI-12 output
lCompatible with the following data loggers: CR6, CR3000, CR1000X, CR800 Series,
CR300Series, CR1000
CS225 Temperature String 6

6. Specifications
Operating range: –55 to 85°C
Accuracy
Typical: ±0.2°C over –40 to 85°C,
Worst case: ±0.4°C over –40 to 85°C;
±0.5°C over –55 to –40°C
(includes lifetime drift of sensor)
Resolution: 0.0078°C
Output protocol: SDI-12 1.3
Measurement update interval: 1 s (automatic), occurs in quiescent mode
Warm-up time: 10 s
Maximum sensors per probe: 36
Supply voltage: 9 to 28 VDC
Current Consumption
Quiescent: # sensors • 1.0 mA (max)
Active (during SDI-12 communications): 20 mA + (# sensors • 1.0 mA)
Temperature point diameter:
Maximum cable length:
Minimum sensor spacing:
EU Declaration of Conformity:
2.22 cm (0.88 in)
152 m (500 ft)
5 cm (1.97 in)
View at www.campbellsci.eu/cs225-l
6.1 SGB3 3-line surge protector
Operating range: –55 to 85 °C
Maximum voltage: ±28 VDC / 20 VAC
(L1, L2, L3 with respect to G terminals)
Maximum current: 2 A per terminal, 4 A total
(requires both ground terminals for return current)
Maximum rated surge: 1200 A (8/20 μs)
CS225 Temperature String 7

7. Installation
If you are programming your data logger with Short Cut, skip Wiring (p. 9) and Programming (p.
10). Short Cut does this work for you. See QuickStart (p. 2) for a Short Cut tutorial.
7.1 Siting
Install the CS225 directly in the medium that is to be measured. The types of medium that can be
measured are varied, including soils, roadbeds, and water. To make the most representative
measurement, it is important that consistent contact be made between the temperature profiler
and the medium.
The CS225 consists of the lead cable and the sensor array. The lead cable length is the length
between the data logger and sensor array. The sensor array length is the length of cable that
incorporates all temperature sensors in their specified configuration. The installation position of
the string and its measurement points are referenced from the first sensor position at the end of
the sensor array. This information is needed for the sensor configuration process.
7.2 Mounting
Orient and secure the CS225 in the measurement medium. Keep materials removed during
installation and use that material as backfill.
If a burial depth is required for each temperature sensor, you need to know the length of the
sensor array, the “measurement from end” metadata of each sensor in the array, and any offset
used during installation of the string. You will also need to calculate the depth of each
temperature sensor.
NOTE:
The furthest temperature point from the data logger (or the temperature point at the end of
the string) is addressed starting at ‘1’. Each temperature point going up the string towards the
data logger changes by one address number/letter.
Orient the lead cable of the CS225 towards the data logger to avoid loops or strain on the cable.
Also use a suitable trench or conduit to protect the signal and power cable from damage.
CS225 Temperature String 8

The SGB3 is required to protect against electrical surges (FIGURE 7-1 (p. 9)). The CS225 is shipped
with the SGB3, a 2-ft cable for connecting the SGB3 to the data logger, and two pan Phillips
screws and two grommets for mounting the SGB3 to an enclosure backplate.
FIGURE 7-1. SGB3 3-line surge protector
7.3 Wiring
Table 7-1 (p. 9) provides the connections for the SGB3 surge protector, CS225, and Campbell
Scientific data loggers.
Table 7-1: Wire colour, function, and connections to the SGB3 and data logger
CS225 wire colour Function SGB3 connection
terminal
Data logger connection
terminal1
Red Power L1 12V
Green SDI-12 Signal L2 Cor U2terminal
configured for SDI-12
Black Power Ground G G
Clear Shield G G
1The SGB3 connects to the data logger using the 2 ft cable shipped with the CS225.
2Uterminals are automatically configured by the measurement instruction.
If multiple SDI-12 sensors are connected to a data logger, Campbell Scientific recommends using
separate terminals when possible. For the CR6 and CR1000X, triggering conflicts may occur when
a companion terminal is used for a triggering instruction such as TimerInput(),PulseCount(),
or WaitDigTrig(). For example, if the CS225 is connected to C3 on a CR1000X, C4 cannot be
used in the TimerInput(),PulseCount(), or WaitDigTrig() instructions.
CS225 Temperature String 9

7.4 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.
A Short Cut tutorial is available in QuickStart (p. 2). 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. 17). Programming basics for CRBasic data loggers are
provided in the following section. Downloadable example programs are available at
www.campbellsci.eu/downloads/cs225-example-programs.
7.4.1 SDI12Recorder()instruction
The SDI12Recorder()instruction is used to measure the temperature sensors in the CS225.
This instruction sends a request to the sensor to make a measurement and then retrieves the
measurement from the sensor. See Sensor measurements (p. 11) for more information.
For most data loggers, the SDI12Recorder()instruction has the following syntax:
SDI12Recorder(Destination, SDIPort, SDIAddress, “SDICommand”, Multiplier, Offset,
FillNAN, WaitonTimeout)
Each temperature sensor in the CS225 needs a unique SDI-12 address. For the SDIAddress,
alphabetical characters need to be enclosed in quotes (for example, “A”). Also enclose the
SDICommand in quotes as shown. The Destination parameter must be an array. The required
number of values in the array depends on the command (Table 8-1 (p. 11)).
FillNAN and WaitonTimeout are optional parameters (refer to CRBasic Help for more
information).
7.4.2 Slow sequence program instructions
Use the slow sequence program instructions when the CS225 measurements will exceed the
program scan interval of the additional instruments included in the station. For example, if a
CS225 consists of 17 or more temperature sensors, the time required to poll all sensors and
receive data can be greater than 5 seconds based on the 300ms execution time for the aR0!
command. For more details on the use of the slow sequence program instructions, reference the
CS225 Temperature String 10

related LoggerNet Help, data logger manual, or the slow sequence program at
www.campbellsci.eu/downloads/cs225-example-programs.
8. Operation
8.1 Sensor measurements
The CS225 responds to the SDI-12 commands shown in Table 8-1 (p. 11). When power is supplied
to the CS225, the internal electronics continuously measure temperature at a rate of
approximately once per second. Every output measurement (aR0! or aM0!) obtained from the
sensor is a running average of 10 consecutive readings. The accuracy specification is based on an
average of 10 consecutive readings. Therefore, after initial power up, a delay of 10s is
recommended to obtain the best accuracy.
As the sensor is obtaining a measurement every second, Campbell Scientific recommends using
the continuous measurement command (aR0!) to obtain the temperature readings. Using the
aR0! commands reduces the time taken in comparison to the aM0! to obtain a reading via the
SDI-12 protocol.
Outputs of both lifetime and user resettable minimum and maximum temperatures are also
available during powered operation from each temperature point in the CS225. The user-
resettable minimum and maximum temperatures can be used to monitor specific seasons or
periods of measure, without having to review the entire data set. The lifetime minimum and
maximum temperatures are used for maintenance and warranty records. The lifetime and user-
resettable minimum and maximum temperature values are single 1-second readings.
Table 8-1: SDI-12 commands
SDI-12
command Variable name Description
aR0! Temperature value Temperature – floating point (°C)
aR1! Serial number, location number, depth
value (in cm)
Serial number, location number, depth
value (in cm)
aR2! Read user resettable min temperature Min. temperature – floating point (°C)
aR3! Read user resettable max temperature Max. temperature – floating point (°C)
aR4! Read lifetime min temperature Min. temperature – floating point (°C)
CS225 Temperature String 11

Table 8-1: SDI-12 commands
SDI-12
command Variable name Description
aR5! Read lifetime max temperature Max. temperature – floating point (°C)
aR6! Read and reset user resettable min
temperature
Min. temperature – floating point (°C).
This value constitutes the minimum of all
1-second measurements taken since the
previous aR6! command.
aR7! Read and reset user resettable max
temperature
Max. temperature – floating point (°C).
This value constitutes the maximum of all
1-second measurements taken since the
previous aR7! command.
aV! Verification command S1 = BootRom Signature
S2 = Firmware Signature
aAb! Change Address command
Valid addresses in sequence are:
1–9 / A–Z / a–z (no Address 0)
Sending a broadcast message with the
address change “{” can correct units that
have conflicting addresses.
aI! SDI-12 Identification command X13CAMPBELLCS225 1.0 SN:XXXXX
8.1.1 SDI-12 addressing
Each temperature sensor has a different default SDI-12 address. The starting addresses is 1 and
coincides with the top temperature point. The last address coincides with the bottom sensor.
If multiple SDI-12 sensors are connected to the data logger, Campbell Scientific recommends
using separate terminals when possible. However, multiple SDI-12 sensors or multiple CS225
sensors can connect to the same data logger control or Uterminal if they have different SDI-12
addresses. If changing the SDI-12 addresses, Campbell Scientific recommends starting the
readdressing process with the largest temperature sensor address to avoid duplicate addresses.
Table 8-2 (p. 13) provides the SDI-12 addresses and positions.
CS225 Temperature String 12

NOTE:
Use the default SDI-12 addresses when possible. Inadvertently giving multiple sensors the
same SDI-12 address will prevent the sensors from communicating. Use the aA{! command,
where ais the affected address to reset the affected sensors to their factory configured
address value.
Table 8-2: SDI-12 addresses and positions
Numeric set Uppercase set Lowercase set
1 / 1 A / 10 a / 36
2 / 2 B / 11 b / 37
3 / 3 C / 12 c / 38
4 / 4 D / 13 d / 39
5 / 5 E / 14 e / 40
6 / 6 F / 15 f / 41
7 / 7 G / 16 g / 42
8 / 8 H / 17 h / 43
9 / 9 I / 18 i / 44
J / 19 j / 45
K / 20 k / 46
L / 21 l / 47
M / 22 m / 48
N / 23 n / 49
O / 24 o / 50
P / 25 p / 51
Q / 26 q / 52
R / 27 r / 53
S / 28 s / 54
T / 29 t / 55
U / 30 u / 56
V / 31 v / 57
CS225 Temperature String 13

Table 8-2: SDI-12 addresses and positions
Numeric set Uppercase set Lowercase set
W / 32 w / 58
X / 33 x / 59
Y / 34 y / 60
Z / 35 a / 61
{ – reset to factory address
8.1.2 Metadata
Every temperature point in a probe includes the following metadata, which can be retrieved
using the aR1! SDI-12 command. This information can be used to identify details of the
temperature probe and its individual temperature points.
Table 8-3: Metadata details
Name Value range Description
Serial
Number 0to65534 The serial number that is unique to each probe unit.
Location
Number 1 to 255
Each temperature sensor within a probe is assigned its own unique
location number which by default is in relation to the SDI-12 address
(see Table 8-1 (p. 11)).
Depth
Value 0to65535cm
The distance values in centimetres (cm). These are intended to reflect
the profile distances. Typically, the top most temperature point
would be designated as 0 cm and if the next temperature point
below was 10 cm away, then its distance value would be 10 cm. Users
may designate other starting values. These can be configured at the
time of ordering.
8.2 Long cables
As the measurement data is transferred between the temperature profiler and data logger
digitally, there are no offset errors incurred with increasing cable length as seen with analogue
sensors. However, with long enough cable lengths, the digital communications will break down,
resulting in either no response from the sensor or corrupted readings. The original SDI-12
standard specifies the maximum total cable length for the cable as being 61m (200ft), but we are
able to exceed this limit by:
CS225 Temperature String 14