Tekmar 079 Slab Sensor Manual de usuario descargar pdf (Pagina 3)

Resistance TableSensor Testing Instructions

A good quality test meter capable of measuring up to 5,000 kΩ (1 kΩ = 1000Ω) 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 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.

Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance

°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 -21 100,221 65 18 13,474 135 57 2,754 205 96 763

0 -18 85,362 70 21 11,883 140 60 2,490 210 99 703

5 -15 72,918 75 24 10,501 145 63 2,255 215 102 648

10 -12 62,465 80 27 9,299 150 66 2,045 220 104 598

15 -9 53,658 85 29 8,250 155 68 1,857 225 107 553

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Tekmar 079 Slab Sensor Manual de usuario Pagina 3