Instrument Operation
4-3
Setting
Options
Description
Chargers
Off/On
Use this option to turn both chargers on or
off. When Off is selected, the status bar
displays “Chargers Turned OFF.”
Column Heater
Off/On
Turns the column heater on or off. Turn the
heater on when the instrument is in a cool
(i.e., air conditioned) environment and
sampling from a warm, humid environment
to prevent condensation that could cause
the electrometers to become noisy.
Normally, it should be turned off unless
needed.
Display
Brightness
0-100
Use this option to change the panel
brightness and improve display visibility.
Note
: On recently built units this
adjustment will have no effect
.
Zero
Electrometer
None
Use this option to calibrate the electrometer
offset (see “
Troubleshooting, Baseline
Noise
” in Chapter 6)
The diagnostics information (Table 4-2) is read-only, and is available to let
you quickly see if any of the important values are out of range.
Table 4-2
Diagnostics Information
Parameter
Nominal Value(s)
Description
Sheath, Sample
Flow
39.4 L/min,
8 L/min
Sheath flow through column and sample
flow (note that sample flow plus
extraction flow equals the flow into the
instrument inlet).
Extraction,
Charger Flow
2 L/min, 0.6 L/min
Extraction pump flow and charger sheath
flow.
Temperature,
Pressure
25.0 C,
700 to 1034 mBar
Temperature of the sheath air flow, in
degree Celsius and absolute pressure
inside the sizing column.
Negative
Charger
35 nA -1000 to
-4200 V
Current of the negative charger, in nano
ampere. Voltage level of the negative
charger electrode, in volts.
Positive
Charger
27 nA 1000 V to
4200 V
Current of the positive charger, in nano
ampere. Voltage level of the positive
charger electrode, in volts.
Column
Voltages
85V, 470V, 1200V
Voltage on center electrode sections, top
to bottom, in volts.
Analog Input Ch
1, Ch 2
0 to 10.0 V,
0 to 10.0 V
Voltage level on the analog input channel
1 and 2, in volts.
MCU Firmware
Version
2.xx
Version of micro controller firmware.
DSP Firmware
Version
2.xx
Version of digital signal processor
firmware.
Error Message
None
Select with cursor to see a list with all
error messages.
Содержание SIZER EEPS 3090
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Страница 149: ...Serial Commands D 3 3 Enter the communications COM port 4 Enter the port settings described below and click OK...
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