Temperature Indicator/transmitter reading is affected by weather changes or not
Temperature Indicator/transmitter reading is affected by weather changes or not
(OP)
Hi,
Could you please, help me to understand that, if the temperature transmitter reading can be affected by the weather changes or not?
Ex: Just imagine the temperature indicator/transmitter is exposed to sun light in summer. Will it cause the reading to be high than real temperature of fluid or there is some kind of protection/isolation to prevent this error?
Could you please, help me to understand that, if the temperature transmitter reading can be affected by the weather changes or not?
Ex: Just imagine the temperature indicator/transmitter is exposed to sun light in summer. Will it cause the reading to be high than real temperature of fluid or there is some kind of protection/isolation to prevent this error?
RE: Temperature Indicator/transmitter reading is affected by weather changes or not
Brad Waybright
It's all okay as long as it's okay.
RE: Temperature Indicator/transmitter reading is affected by weather changes or not
The transmitter will give accurate readings as long as the transmitter temperature is within the limits of the internal compensation circuit.
We had an issue of an application of a temperature transmitter which would be used in an ambient temperature that at times would be below the compensation range.
We conducted some tests by cooling the transmitter and checking the indicated temperature against the actual temperature.
We found that the error matched the amount that the temperature was below the compensation limit.
The intended use was a safety shutdown of a stack. We reasoned that if conditions caused to stack temperature to rise to a dangerous level on a cold day that it would not be a problem and may actually be advantageous if the process shut down at a lower stack temperature.
The transmitter was used and worked well.
Measure the temperature of your transmitter on a day when the sunlight is shining brightly on the transmitter. Reconcile this with the listed limits of the internal compensation.
Bill
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"Why not the best?"
Jimmy Carter
RE: Temperature Indicator/transmitter reading is affected by weather changes or not
TTFN (ta ta for now)
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RE: Temperature Indicator/transmitter reading is affected by weather changes or not
Dumb, cheap transmitters might very well have no temperature compensation. You get what you pay for.
The device's spec sheet will tell you over what (ambient) temperature range it can be used, but "ambient" means the temperature of the transmitter housing (and the transmitter inside), not the air around it. Housing can be hotter than ambient air.
RE: Temperature Indicator/transmitter reading is affected by weather changes or not