INFICON LDS3000 Modular Leak Detector - Manual (Page 23)

Operation 23
Via interface
The output voltage can be specified via the LD protocol command 221.
Leakage rate Ma. Hys.
0.7 ... 10 V; linear; in used unit
Information Useful only if the other analog output is assigned “Leak rate exponent”.
This layout prevents the exponent from constantly jumping between two decades.
0.7 V corresponds to a leakage rate of 0.7 x 10 -x .
9.9 V corresponds to a leakage rate of 9.9 x 10
-x
.
Pressure p1 (1 V / dec.) / Pressure p2 (1 V / dec.)
1 ... 10 V; 1 V / decade; 2.5 V = 1 x 10 -3 mbar; 8.5 V = 1000 mbar
Leak rate log. H. / Leak rate exp. Inv.
This assignment ensures backward compatibility to older units.
6.2.3 Output voltages in case of error
The following voltages will be applied at the analog outputs in the event of an error:
Compatibility mode Voltage
LDS1000 0 V
LDS2010 10 V
LDS3000 10.237 V