Oldham WX16, User Manual

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WX16 User Manual | 18
if a channel’s input is 4-20mA from a transmitter monitoring 0 to 10ppm chlorine, then
the
Zero value should equal 0.000 and the Span value equal 10.00. The six ASCII
engineering units previously entered are automatically displayed at the top of each
menu as a reminder. Four digits must appear in this entry, so trailing 0’s may appear
here that are not displayed on other data screens.
2.2.6c Decimal Point Resolution
Resolution of displayed channel values is configured in this menu by setting the
number digits trailing the decimal point. Values are limited to a maximum of four digits,
and a polarity sign. An auto-ranging feature displays the highest resolution allowed by
this menu’s decimal point entry. For example, if three decimal points are entered, and
the range is 0 to 100ppm, the reading will be
0.000 at 0ppm and 100.0 at 100ppm.
However, this may be undesirable due to the high resolution at zero unless the
sensor’s output is extremely stable. If decimal points are limited to one, the 0ppm
reading becomes
0.0 and the 100ppm reading remains 100.0 . Resolution may be
limited further by setting decimal points to 0. In the above example, this would cause
0ppm to display
0 and 100ppm to display 100 .
2.2.6d Turning Off Unused Channels
The Channel On? entry determines if this channel is to be utilized. Turning it off will
cause the controller to never process inputs applied to this channel and no alarms will
be tripped or data displayed. Inactive channels have a line drawn through them on the
Setup screen as indicated by channels 15 & 16 in Figure 2.0. If less than 9 channels
are to be activated, the WX16 may be set for 8 channel mode, deactivating channels 9-
16. This is done in the System Setup menu described in section 2.3. The WX16 will
only allow 15 channels to be turned off. At least one channel must remain on
2.2.6e Copy Data To?
This menu simplifies the Setup procedure by allowing similar channels to be copied
from one to another. For example, if all channels are identical except for the
Measurement Name entry, channel 1 could be configured and copied to channels 2 –
16. Only Measurement Name then must be configured on channels 2 – 16. Use EDIT
to increment channel numbers and UP/DN to point to Copy Now? Press EDIT once
more to copy.
2.2.7 Cal Mode
IMPORTANT! Each channel’s CALIBRATION menu is inactive unless its Input Data
From: menu, described in section 2.2.4, is set for Analog with Local Cal or Sensor
Direct . WX16 CAL MODE features allow pushbutton calibration of zero and span
values. This feature should be utilized only when there are no other zero/span controls
within the monitoring system, since it is inappropriate to calibrate a signal at more than
one point. Therefore, if calibration is to be performed at another transmitter or
monitoring device, the WX16 CAL MODE feature should not be used.