User Manual SERVOPRO Plasma Trace N
2
Analyzer
7.0 OPERATION
3. Analog output mode: by pressing the "F2" key, the analog 4 - 20 mA output will be in either
"track" or "hold" mode.
Hold mode: "hold" will maintain analog output at last "on run" gas value when exiting run
mode.
Track mode:"track" will cause analog output to track input gas value during all modes.
Pressing the"F3" key will bring you to the second page of the CONFIGURATION MENU.
FIGURE 3 : CONFIGURATION MENU - Page 2
4. mA Failure mode F1 : in the case of an “Underscale”, "Over scale", “Low Flow” or "Plasma
off", this option will set the 4-20 mA output : Off (always remain between 0 and 20 mA, even
if an error occurs), Low (below 4 mA), or High (higher than 20 mA).
If you have any options, you will find them described in the appropriate appendix of this manual.
You exit the configuration section by pressing F4. The analyzer will display the first page of the
CONFIGURATION MENU. Pressing F4 again brings up the MAIN MENU.
This is the standard configuration. Other menus may appear if your analyzer has other optional
features (serial port, fully automatic calibration, digital I/O, etc.).
NOTE: When you select the automatic ranging feature, the scale selection is based on analog to
digital count value or ppm value, based on which one reaches the maximum value for the scale
in use.
7.2 Calibration
The calibration menu is shown in Fig. 4. In this section, you have to enter the value in ppm of
your zero calibration gas and your span calibration gas. The recommended values are between 0
and 20% of the full scale for the zero value, and between 80 and 95% of the full scale for the
span value.
For example, a zero gas of 2.0 ppm and a span gas of 8.0 ppm are excellent values for X10 range.
Once the span value is entered, the analyzer will automatically select the proper operating scale.
For this reason, you must wait for signal stabilization before sampling the value for calibration.
<<CONFIGURATION MENU>> Page 2
F1:mA failure mode (high/low/off):HIGH
No other options available
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