Ecotech Serinus 44 - 3.4.14 Digital Pots Menu

Serinus 44 User Manual 3.0
Page 52
3.4.14 Digital Pots Menu
Main Menu  Service Menu  Diagnostics Menu  Digital Pots Menu
Digital pots are electronically controlled digital potentiometers used for adjustments to operations of
the instrument. Each of the digital pots can go from 0-255. This menu should be accessed only during
diagnostics.
Unless the Control Loop is Disabled (refer to Section 3.4.13), changes to the pots may be modified by
the instrument. This is intentional; some diagnostics are best done with instrument feedback and
some are best done without.
High Volt Tuning
Disabled
When the instrument first starts it will tune the high voltage
supply by automatically setting the High Volt Adj Pot. After a
stable value is reached the instrument will Disable the High Volt
Tuning. You can force the instrument to re-tune the high voltage
supply by setting this field to Enabled and rebooting the
instrument.
High Volt Adj Pot
130-150
Allows manual adjustment of the PMT high voltage supply.
High Voltage
640-670
The voltage applied to the PMT.
PGA Gain
1-128
Displays the gain of the PGA.
Input Pot
104
Reduces the raw signal to measurable level.
Conc Voltage (RAW)
0-3.1
The concentration voltage measured by the analog to digital
converter.
Conc Voltage
0-3.1
The concentration voltage after adjustment for the PGA gain
factor.
Diagnostic Mode
Operate
 Operate (default): Puts the instrument in normal operation
mode.
 Electrical: Injects an artificial test signal into the electronic
processing circuitry on the main controller PCA to verify that
the circuitry is operating correctly. When in this Diagnostic
Mode, adjust the Diagnostic Test Pot from 0 to 255. This will
produce a change in the concentration voltage as well as the
indicated gas concentration.
 Preamp: Injects an artificial test signal into the Preamplifier
module mounted in the optical bench to verify that the
Preamplifier, cabling and electronic circuitry on the main
controller PCA is operating correctly. When in this Diagnostic
Mode, adjust the Diagnostic Test Pot from 0 to 255. This will
produce a change in the concentration voltage as well as the
indicated gas concentration.
 Optic [Optional]: Emits artificial light into the Reaction Cell to
simulate a real chemiluminescence reaction. This will verify that
the PMT, Preamp and electronic circuitry on the main controller
PCA is operating correctly. When in this Diagnostic Mode,
adjust the Diagnostic Test Pot from 0 to 255. This will produce a
change in the concentration voltage as well as the indicated gas
concentration. This menu item is only available if you have
installed the optical test lamp (refer to Section 3.4.30).
Diagnostic Test Pot
0
This Digital Pot is used for diagnostics only. When in the Electrical,