Instruction Manual CVM201 Super Bee
InstruTech, Inc. Page 21
7.3 Log-Linear Analog Output - Torr
Log-Linear analog output for selected gases - Engineering units in Torr
N
2
Ar He
O
2
CO
2
Kr Freon12 Freon22
D
2
Ne
CH
4
0.0001 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
0.0002 1.301 1.301 1.301 1.301 1.301 1.301 1.301 1.301 1.301 1.301 1.301
0.0005 1.699 1.699 1.699 1.699 1.699 1.477 1.699 1.699 1.699 1.699 1.699
0.0010 2.000 1.845 1.903 2.000 2.041 1.602 2.176 2.176 2.114 1.845 2.230
0.0020 2.301 2.146 2.204 2.301 2.362 2.000 2.491 2.491 2.380 2.176 2.519
0.0050 2.699 2.519 2.602 2.699 2.643 2.362 2.881 2.845 2.778 2.544 2.886
0.0100 3.000 2.820 2.908 2.987 3.041 2.681 3.167 3.130 3.083 2.851 3.185
0.0200 3.301 3.117 3.207 3.297 3.346 2.978 3.476 3.435 3.386 3.149 3.483
0.0500 3.699 3.511 3.607 3.692 3.740 3.371 3.860 3.839 3.778 3.542 3.888
0.1000 4.000 3.808 3.914 3.988 4.029 3.670 4.155 4.134 4.083 3.845 4.201
0.2000 4.301 4.100 4.217 4.288 4.322 3.960 4.439 4.418 4.398 4.149 4.498
0.5000 4.699 4.494 4.638 4.687 4.689 4.336 4.786 4.774 4.837 4.555 4.893
1.0000 5.000 4.778 4.973 4.987 4.978 4.602 5.021 5.017 5.190 4.872 5.204
2.0000 5.301 5.057 5.346 5.288 5.233 4.845 5.210 5.220 5.616 5.201 5.522
5.0000 5.699 5.389 6.130 5.697 5.524 5.107 5.389 5.418 7.391 5.719 5.877
10.0000 6.000 5.602 8.041 6.013 5.696 5.250 5.471 5.530 8.041 6.332 6.446
20.0000 6.301 5.763 8.041 6.348 5.819 5.360 5.521 5.571 8.041 7.766 7.550
50.0000 6.699 5.895 8.041 6.890 5.915 5.410 5.579 5.617 8.041 8.041 7.925
100.0000 7.000 5.946 8.041 7.320 5.966 5.438 5.670 5.691 8.041 8.041 8.041
200.0000 7.301 5.991 8.041 7.470 6.090 5.521 5.777 5.808 8.041 8.041 8.041
300.0000 7.477 6.053 8.041 7.580 6.228 5.555 5.838 5.876 8.041 8.041 8.041
400.0000 7.602 6.130 8.041 7.686 6.350 5.595 5.883 5.925 8.041 8.041 8.041
500.0000 7.699 6.207 8.041 7.781 6.458 5.624 5.918 5.964 8.041 8.041 8.041
600.0000 7.778 6.274 8.041 7.863 6.561 5.647 5.947 5.998 8.041 8.041 8.041
700.0000 7.845 6.338 8.041 7.934 6.664 5.667 5.974 6.029 8.041 8.041 8.041
760.0000 7.881 6.375 8.041 7.974 6.732 5.677 5.989 6.045 8.041 8.041 8.041
800.0000 7.903 6.400 8.041 7.999 6.774 5.685 5.998 6.057 8.041 8.041 8.041
900.0000 7.954 6.455 8.041 8.041 6.900 5.698 6.021 6.079 8.041 8.041 8.041
1000.0000 8.000 6.512 8.041 8.041 7.045 5.706 6.045 6.104 8.041 8.041 8.041
Values listed under each gas type are in volts.
The log-linear output signal and pressure are related by the following formulas:
P = 10
(V - 5)
V = log
10
(P) + 5
where P is the pressure in Torr, and V is the output signal in volts.
An analog output of less than 0.01 volts to near 0 volt indicates a damaged or faulty sensor.
The chart on the following page shows the graphical results of the table and formulas given above for nitrogen.
True pressure (N
2
) is plotted on the X-axis with a log scale. The output signal is plotted on the Y-axis on a linear
scale.
To Next Page
Loading...
Need help?
General
