tekmar 072 User Manual

- Data Brochure

10k Slab Sensor 072

072_D

11/12

Slab Sensor 072

The tekmar Slab Sensor 072 has a black high density
polyethylene head and is ideal for use in soil or concrete.

Sensor Wiring

Caution: Do not run sensor wires parallel to telephone or

power cables. If sensor wires are located in an area with
strong sources of electromagnetic interference, shielded
cable or twisted pair should be used. Alternately, the
wires can be run in a metal conduit that is grounded to
the common sensor terminal on the control and not to
earth ground.

Sensor wiring can extended up to 500’ using 18

•
AWG wire.

Wire splices should be properly soldered and

•
protected in an accessible, waterproof junction box.

Replaces: 06/10

The 072 is supplied with 20’ (6 m) of 2-conductor cable.

Slab Sensor 072 placed 1/2 way between the pipes
or cables inside the conduit

1”

(25 mm)

Installation

Installing the Sensors

Note: Proper placement of sensors is critical for correct

control operation.

Though sensors are designed for direct embedding in
slab material, it is recommended to install them in a metal
or plastic sleeve. This allows for easy replacement if the

Sensor Testing Instructions

A good quality test meter capable of measuring up to 5,000
k (1 k = 1000) is required to measure the sensor
resistance. In addition to this, the actual temperature must
be measured with either a good quality digital thermometer,
or if a thermometer is not available, a second sensor can
be placed alongside the one to be tested and the readings
compared.

First measure the temperature using the thermometer and
then measure the resistance of the sensor at the control.
The wires from the sensor must not be connected to the
control while the test is performed. Using the chart on the

sensor should ever fail or have to be relocated. The sensor
should be placed 1” (25 mm) below the slab surface and
1/2 way between the pipes or electric cables.

following page, estimate the temperature measured by
the sensor. The sensor and thermometer readings should
be close. If the test meter reads a very high resistance,
there may be a broken wire, a poor wiring connection or
a defective sensor. If the resistance is very low, the wiring
may be shorted, there may be moisture in the sensor or
the sensor may be defective. To test for a defective sensor,
measure the resistance directly at the sensor location.

Do not apply voltage to a sensor at any time as damage
to the sensor may result.

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Temperature vs. Resistance Table

TemperatureResistanceTemperatureResistanceTemperatureResistanceTemperatureResistance

°F °C

°F °C

Ω

°F °C °F °C

-50 -46 490,813 20 -7 46,218 90 32 7,334 160 71 1,689

-45 -43 405,710 25 -4 39,913 95 35 6,532 165 74 1,538

-40 -40 336,606 30 -1 34,558 100 38 5,828 170 77 1,403

-35 -37 280, 279 35 2 29,996 105 41 5,210 175 79 1,281

-30 -34 234,196 40 4 26,099 110 43 4,665 180 82 1,172

-25 -32 196,358 45 7 22,763 115 46 4,184 185 85 1,073

-20 -29 165,180 50 10 19,900 120 49 3,760 190 88 983

-15 -26 139,402 55 13 17,436 125 52 3,383 195 91 903

-10 -23 118,018 60 16 15,311 130 54 3,050 200 93 829

-5 -21 10 0,221 65 18 13,474 135 57 2,754 20 5 96 763
0 -18 85,362 70 21 11,883 140 60 2,490 210 99 703
5-15 72,918 7524 10,501 14563 2,255 215102 648

10 -12 62,465 8 0 27 9,299 150 6 6 2,04 5 220 104 598
15 -9 53,658 85 29 8,250 155 68 1,857 225 107 553

Technical Data

Slab Sensor 072

Approvals CSA C US

Operating Range -60 to 140°F (-51 to 60°C)

Dimensions 3/8” OD x 1.5” (10 OD x 38 mm), 20’ (6 m) 18 AWG wire.

Sensor NTC thermistor, 10 kΩ @ 77°F (25 °C ± 0.2°C), β = 3892

Materials

Packaged Weight

Black High Density Polyethylene (HDPE) sleeve and jacket, solid PVC insulated wire

0.37 lb. (170 g)

Limited Warranty and Product Return Procedure

Limited Warranty The liability of tekmar under this warranty is limited. The

Purchaser, by taking rec eipt of any tekmar product (“Product”), acknowl­edges the terms of the Limited Warranty in effect at the time of such Product
sale and acknowledges that it has read and understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder
is a manufacturer’s pass-through warranty which the Purchaser is authorized
to pass through to its customers. Under the Limited Warranty, each tekmar
Product is warranted against defects in workmanship and materials if the Prod­uct is installed and used in compliance with tekmar’s instructions, ordinary
wear and tear excepted. The pass-through warranty period is for a period of
twenty-four (24) months from the production date if the Product is not installed
during that period, or twelve (12) months from the documented date of installa­tion if installed within twenty-four (24) months from the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s
sole discretion: the cost of parts and labor provide d by tekmar to repair defects in
materials and/or workmanship of the defective product; or to the exchange of the
defective product for a warranty replacement produc t; or to the granting of credit
limited to the original cost of the defective product, and such repair, exchange or
credit shall be the sole remedy available from tekmar, and, without limiting the
foregoing in any way, tekmar is not responsible, in contract, tort or strict prod­uct liabilit y, for any other losses, costs, expenses, inconveniences, or damages,
whether direct, indirect, special, secondar y, incidental or consequential, arising
fro m ownership o r use of the p ro duct, o r from de fe ct s in wo rk manshi p or ma te ri al s,
including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products
returned to tekmar during the warranty period. This Limited Warrant y does not
cover the cost of the parts or labor to remove or transport the defective Product, or
to reinstall the repaired or replacement Product, all such costs and expenses being
subject to Purchaser’s agreement and warranty with its c ustomers.

Any representations or warranties about the Products made by Purchaser to its
customers which are different from or in excess of the tekmar Limited Warranty are

the Purchaser’s sole responsibility and obligation. Purchaser shall indemnify and
hold tekmar harmless from and against any and all claims, liabilities and damages
of any kind or nature which arise out of or are related to any such representations
or warranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the returned Product has
been damaged by negligence by persons other than tekmar, accident, fire, Act
of God, abuse or misuse; or has been damaged by modifications, alterations or
attachments made subsequent to purchase which have not been authorized by
tekmar; or if the Product was not installed in compliance with tekmar’s instructions
and/or the local codes and ordinances; or if due to defective installation of the
Product; or if the Product was not used in compliance with tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, WHICH THE GOVERNING LAW ALLOWS PARTIES TO CONTRACTU­ALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABIL­ITY OR DESCRIPTION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY
RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR NON­VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY LEG­ISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRAC­TUALLY EXCLUDED IS LIMITED SUCH THAT IT SHALL NOT EXTEND BEYOND
TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION DATE, TO THE EXTENT
THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW.

Product Warranty Return Procedure All Products that are believed to have
defects in workmanship or materials must be returned, together with a written
description of the defect, to the tekmar Representative assigned to the territor y in
which such Product is located. If tekmar receives an inquiry from someone other
than a tekmar Representative, including an inquiry from Purchaser (if not a tekmar
Representative) or Purchaser’s customers, regarding a potential warranty claim,
tekmar’s sole obligation shall be to provide the address and other contact informa­tion regarding the appropriate Representative.

tekmar Control Systems Ltd., A Watts Water Technologies Company.

Vernon, B.C. Canada V1B 3K4, 250-545 -7749, Fax. [phone] Web Site: www.tekmarControls.com

Product design, software and literature are Copyright ©2012 by
tekmar Control Systems Ltd.,

A Watts Water Technologies Company

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Head Offi ce: 5100 Silver Star Road,

All specifications are subject to change without notice.

Printed in Canada. 072_D - 11/12.