Temperature Compensation温度补偿
<p><strong>2. If the temperature has big change, then density will change as well, then the fuel height data need to calibrate depends on different temperature.</strong>
<img src="https://www.showdoc.cc/server/api/attachment/visitfile/sign/88f18d9c8bd7afa5b3064ddfac6b61de?showdoc=.jpg" alt="" /></p>
<p><img src="https://www.showdoc.cc/server/api/attachment/visitfile/sign/972ae4076a153fb6469e5d0efe65f8ae?showdoc=.jpg" alt="" /></p>
<p><strong>3. If you're using normal 0# Diesel, you can use the setting in Point 1 to do Temperature Compensation .
</strong></p>
<p><strong>4. How to get correct Sound speed in 5, 55℃ if we're not using standard Diesel or other liquid?
</strong>
a. Prepare the liquid, for example diesel in a small bottle/cup. Height around 200mm.
Put one Thermometer inside.</p>
<p>b. Put the cup in Fridge for 10 minutes, which temprature to be around 4~6 ℃
c. Then bring out the cup, put the Ultrasonic Sensor under the cup/bottle, and read the height data.
d. Pu the cup in a pot with hot 100℃ water.
e. Fo example,
Record the Ultrasonic Fuel Level Sensor Reading, Xmm @31.2℃， Y mm @ 54.5 ℃.
Then We can use the two data to calculate the height at 5， 55 ℃：
5℃： A mm
(|X-A|)/(31.2-5)=(X-Y)/(|31.2-54.5|)
A must be smaller than X</p>
<p>55℃： B mm
(|X-B|)/(|31.2-55|)=(X-Y)/(|31.2-54.5|)
B must be bigger than X</p>
<p>If you think X mm is correct value should show in your platform, which speed is 1345
Then sound speed in 5 ℃ V5, in 55℃ V55 will be
A/X=1345/V5
X/B=V55/1345</p>
<p>For example,
31.2℃，88.4mm=x, speed =1345
54.5℃， 97.4mm=Y</p>
<p>Then A=78.15mm, B=97.55mm
Then
V5= 1345<em>88.4/78.15=1221
V55= 1345</em>88.4/97.55=1522</p>