The resistance of a RTD, RT, at a given temperature T is given by the following equation
(a) The resistance of a RTD, RT, at a given temperature T is given by the following equation:
RT = R0 (1 + αT)
where R0 is the resistance of the RTD at the reference temperature 0°C, α is the temperature coefficient at 0 °C.
It is found that the resistance of the RTD are 130 Ω and 150 Ω at 10°C and at 50°C respectively. Calculate:
(i) the temperature coefficient a, and
(ii) the resistance of the RTD at 0°C, R0.
(b) The RTD in part (a) is used in the bridge circuit as shown in Fig. 210. Determine:
(i) at which temperature the bridge will balance,
(ii) the output voltage V0. at 100°C, and
(iii) the type of instrument most suitable for the measurement of V0.
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