INFICON T-Guard Leak Detection Sensor - Manual (Page 54)

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Operation
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5.6 Configuring analog output
You can configure the analog output in the menu screen
Main Menu
→
Settings
→
Interfaces
in Analog Output and Analog Scale
• In the setting "LR Exponent", the exponent results from the voltage as follows:
Exponent = (voltage x 2) -14
For example: A voltage of 4.5 V results in an exponent of (4.5 x 2) - 14 = -5.
• In the setting "LR Log.", the leak rate is calculated as follows:
Leak rate = final value x (10^((U - 10)/(volts/decade)) )
For example: With a final value of 10
-1
mbar l/s and 2 V per decade, a voltage of 3.7
V results in a leak rate of 10
-1
mbar l/s x 10^((3.7-10)/2) = 10
-1
mbar l/s x 10
-3,15
=
10
-1
mbar l/s x 7,08x10
-4
= 7,08x10
-5
mbar l/s.
For "Current Log.", it is similar for current instead of leak rate.
Fig. 6-14 Configuration of analog outputs.
Fig. 6-15 Configuration of the scale of the analog outputs.