Servomex DF-310E, Operator'S Manual

Page: 64 / 130

60 DF-310E User Interface
Below the Data Line is a display of the Analog Output Range settings. The analog outputs are
scaled over the range displayed in this area. Factory standard analog outputs are 0-10 VDC and
Isolated 4-20 mA. Setting the analog voltage output is described on page 70. If the Analyzer is
equipped with the Expanded Range Scale option the Analog Output Range value will change
from OUT: x-xxxx to XPOUT: x-xxxx, and will appear in reverse video, when the expanded
range scale is active.
* Menu indicates that if is pressed, the Main Menu display, Figure 33, will appear.
GSF indicates the present Gas Scale Factor. The Gas Scale Factor is described on page 74. If
the Analyzer is not equipped with the GSF option, or if N
2
is selected from the GSF table, then
no GSF is displayed.
The legend " OVER RANGE " will overwrite the Oxygen display if the instrument analog to
digital converter reads a value which is over its full scale range. During an over range condition
the oxygen information is not valid. The analog output will be at maximum (pegged). An
“OVER RANGE” condition will result in a continuous alarm tone, which may be silenced by
pressing ESC.
The legend “ SENSOR OFF! ” will overwrite the Oxygen display if the sensor polarization
voltage is turned off by using the Sensor selection in the Controls menu. The polarization
voltage will automatically turn off if the Analyzer is OVER RANGE for more than 30 minutes.
When the sensor is off the analog output falls to zero volts and the 4-20 mA output falls to 4 mA.
An optional relay may be configured to indicate that the sensor is off. A “SENSOR OFF !”
condition will result in an intermittent alarm tone, which may be silenced by pressing ESC.
NOTE: The automatic sensor off function is disabled if the display is not in the main O2 readout
mode.
A reverse video overlay will appear over the center of the display for the following alarms:
Oxygen (1,2,3,4), Temperature (T), Flow (F), and Electrolyte Condition (E). The overlay
appears and disappears at intervals so that the Oxygen reading is still visible. If there are several
alarms in progress all of the alarm overlays will be displayed in sequence.
The overlay also indicates the set point value and whether the alarm condition is a high or low
alarm. If the alarm is a Flow or Electrolyte Condition alarm the set point is not displayed
because these alarms do not have set point values. Audible annunciation can be activated for
each of the alarms. If annunciation is activated, a continuous tone will occur when the overlay is
displayed. Pressing ESC while the overlay is displayed will silence the tone and cause the
overlay to disappear. Once an alarm has been acknowledged (by pressing ESC) its number will
be continuously displayed in the Data Display Window on the Annunciator Line. The numbers
are assigned as follows:
The alarm number will clear only after the alarm condition is over.
In the case of simultaneous alarms, each will alternately overwrite the display. Successive
presses of ESC (as the overwrite is displayed) are necessary to clear the overwrite and