Question

In the case of a second-order instrument, indicate the effect of different degrees of damping on the time response. 2.9. State briefly how the dynamic characteristics of an instrument affect its usage. 2.10. A tungsten resistance thermometer with a range of -270 to +1100°C has a quoted inaccuracy of ±1.5% of full-scale reading. What is the likely measurement error when it is reading a temperature of 950°C? 2.11. A batch of steel rods is manufactured to a nominal length of 5 meters with a quoted tolerance of ±2%, What is the longest and shortest length of rod to be expected in the batch? 2.12. What is the measurement range for a micrometer designed to measure diameters between 5.0 and 7.5 cm? 2.13. A tungsten/5% rhenium-tungsten/26% rhenium thermocouple has an output e.m.f. as shown in the following table when its hot (measuring) junction is at the temperatures shown. Determine the sensitivity of measurement for the thermocouple in mV/°C. mV °C 4.37 8.74 13.11 17.48 250 500 750 1000 2.14. Define sensitivity drift and zero drift. What factors can cause sensitivity drift and zero drift in instrument characteristics?

          In the case of a second-order instrument, indicate the effect of different degrees of
damping on the time response.
2.9. State briefly how the dynamic characteristics of an instrument affect its usage.
2.10. A tungsten resistance thermometer with a range of -270 to +1100°C has a quoted
inaccuracy of ±1.5% of full-scale reading. What is the likely measurement error when
it is reading a temperature of 950°C?
2.11. A batch of steel rods is manufactured to a nominal length of 5 meters with a quoted
tolerance of ±2%, What is the longest and shortest length of rod to be expected in the
batch?
2.12. What is the measurement range for a micrometer designed to measure diameters
between 5.0 and 7.5 cm?
2.13. A tungsten/5% rhenium-tungsten/26% rhenium thermocouple has an output e.m.f.
as shown in the following table when its hot (measuring) junction is at the temperatures
shown. Determine the sensitivity of measurement for the thermocouple in mV/°C.
mV
°C
4.37
8.74
13.11
17.48
250
500
750
1000
2.14. Define sensitivity drift and zero drift. What factors can cause sensitivity drift and zero
drift in instrument characteristics?

In the case of a second-order instrument, indicate the effect of different degrees of
damping on the time response.
2.9. State briefly how the dynamic characteristics of an instrument affect its usage.
2.10. A tungsten resistance thermometer with a range of -270 to +1100°C has a quoted
inaccuracy of ±1.5% of full-scale reading. What is the likely measurement error when
it is reading a temperature of 950°C?
2.11. A batch of steel rods is manufactured to a nominal length of 5 meters with a quoted
tolerance of ±2%, What is the longest and shortest length of rod to be expected in the
batch?
2.12. What is the measurement range for a micrometer designed to measure diameters
between 5.0 and 7.5 cm?
2.13. A tungsten/5% rhenium-tungsten/26% rhenium thermocouple has an output e.m.f.
as shown in the following table when its hot (measuring) junction is at the temperatures
shown. Determine the sensitivity of measurement for the thermocouple in mV/°C.
mV
°C
4.37
8.74
13.11
17.48
250
500
750
1000
2.14. Define sensitivity drift and zero drift. What factors can cause sensitivity drift and zero
drift in instrument characteristics?

Added by Wendy C.

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