Vaisala PTU200 Series Podręcznik Użytkownika Pobierz pdf (Strona 44)

USER'S GUIDE_______________________________________________________________________

40 ___________________________________________________________________ M210195EN-A

Example: T

ref

= 23.15°C

meas

= 23.28°C

Offset = -0.13°C

Gain

The gain correction can be calculated with the equation 6-2. It is

reasonable to use the low (T

) and the high (T

) end of needed

temperature range.

(

)

(

)

measmeas

measrefmeasref

TTTT

Gain

−

−−−

(6-2)

where:

ref1

= measured with a reference thermometer at temperature T

ref2

= measured with a reference thermometer at temperature T

meas1

= measured with PTU200 at temperature T

meas2

= measured with PTU200 at temperature T

Example:

ref1

= -14.97°C and T

meas1

= -14.90°C

ref2

= +30.12°C and T

meas2

=+30.29°C

Gain = 0.99779

Offset = T

ref2

-Gain*T

meas2

= -0.10

T = 0.99779 * 30.29°C - 0.10 = 30.12°C

TXCI Entering corrections for HMP45D and PT100

temperature measurement

TXCI x

where:

x = 2 if there is one pressure transducer installed

3 if there is two pressure transducers installed

The TXCI command is used to enter new offset and offset/gain

corrections for temperature measurement of HMP45D and PT100.

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