INFICON Guardian EIES Controller User Manual
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Guardian Co-Deposition Controller Operating Manual
7.3.4.7 G
Description: Get PMT readings.
Readings are returned as a comma delimited string of average A to D counts (Cts)
and number of A to D conversions (Cnv) use to calculate the average Cts. The
readings for each PMT module are separated by a semi colon. Readings are only
returned for modules with a new reading available. The format of the returned
string when a new reading is available for PMT modules 1, 2, and 8 is:
OnCtsPMT1,OnCnvPMT1,OffCtsPMT1,OffCnvPMT1,GasCtsPMT1,GasCnvPMT1;
OnCtsPMT2,OnCnvPMT2,OffCtsPMT2,OffCnvPMT2,GasCtsPMT2,GasCnvPMT2;
;;;;;OnCtsPMT8,OnCnvPMT8,OffCtsPMT8,OffCnvPMT8,GasCtsPMT8,GasCnvPMT8
Use the Slope and Intercept values calculated using the C command to calculate
the current for a PMT module:
OnCurrentPMT# = 2000nA - (Slope(PMT#) * OnCtsPMT#) + Intercept(PMT#)
OffCurrentPMT# = 2000nA - (SlopePMT# * OffCtsPMT#) + InterceptPMT#
GasCurrentPMT# = 2000nA - (SlopePMT# * GasCtsPMT#) + InterceptPMT#
Finally, the measured PMT current is calculated by:
CurrentPMT# = (OnCurrentPMT# - OffCurrentPMT#) -
(GasCurrentPMT# - OffCurrentPMT#)
Parameters: None
Example: G
Returns: G;992445,99,992492,99,992462,100;
992445,99,992492,99,992462,100;;;;; 992445,9
7.3.4.8 H
Description: Sets PMT bias voltage. Values from 0 V to 1250 V are possible.
See Note in
re "safe mode" timeout.
Parameters: PMT#,Voltage
Example: H1, 750 (set PMT1 bias voltage to 750 V)
Returns: H