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**Technical support / Perplexed by puzzling parentheses pecualiarity**

« **on:**February 18, 2019, 11:26:21 PM »

I'm not sure if this is a bug or a feature, but I'll throw it out there for your consideration....

In my FMD88-10 I have a Custom Function that takes an incoming analog voltage, scales it and converts the voltage to a temperature. The last step in my CF is to convert the temperature from degrees C to degrees F using the commonly known equation:

F = (C * (9/5)) +32

Great, right? WRONG! The unnecessary pair of parentheses around the "9/5" causes the TBasic to yield an incorrect answer.

At room temperature (25C), the above equation yields and answer that's 17F degrees low. At a temperature of 200C, the answer is over 150F too low.

What I know is...

In my FMD88-10 I have a Custom Function that takes an incoming analog voltage, scales it and converts the voltage to a temperature. The last step in my CF is to convert the temperature from degrees C to degrees F using the commonly known equation:

F = (C * (9/5)) +32

Great, right? WRONG! The unnecessary pair of parentheses around the "9/5" causes the TBasic to yield an incorrect answer.

At room temperature (25C), the above equation yields and answer that's 17F degrees low. At a temperature of 200C, the answer is over 150F too low.

What I know is...

- That the "()" around the "9/5" is unnecessary.
- That "F = (C * (9/5)) +32" is mathematically identical to "F = (C * 9/5) +32".
- That with or without the "()", the above equations will yield the identical answers when calculated in a spreadsheet, with a hand calculator or using simple pencil and paper.