Kistler-Morse KM ultrawave - Manual (Page 64)

Current output is typically used to retransmit continuous level/flow data to a remote display or PLC/Distributed
Control System (DCS). The current output setup functions are accessed in this menu. The functions include
adding and deleting outputs, and selecting fail-safe and operating modes. Up to two sets of current outputs can
be assigned per channel.
Figure 23: Output Menu Tree
41
Report
When this menu is accessed, the display shows the current outputs assigned to the displayed channel. The
top line of the display shows an assigned output number; the bottom line shows the slot number of the Current
Output PCB and the channel number for the current output on the Current Output PCB. Pressing any key other
than Esc or Scan/Hold toggles between the assigned current output channels. A typical display looks like this:
ONLY Output Chan
Slot 03 Chan # 1
42 set
This menu is used to select the current outputs, assign values to determine the points where the transmitter
outputs the currents, and define fail-safe conditions for the current outputs. Current outputs can be established
for monitoring channels and also for math channels. Set has three submenus for level and four submenus for
flow applications.
• 4/0mA — the 4/0mA Menu sets the low current (4 mA or 0 mA) operation point. The value entered
determines the point where the transmitter outputs the minimum current. For example, if 10’ is entered
as the low current operation parameter and the Mode function is set to 4-20 mA operation, when the
displayed level is less than or equal to 10’, the current output transmits 4 milliamps.
• 20mA — the 20mA Menu sets the high current (20 mA) operation point. The value entered determines
the point where the transmitter outputs the maximum current. For example, if 50’ is entered, the current
output transmits 20 milliamps when level is greater than or equal to 50’.
• Echo Loss Mode — if the UltraWave Series detects an echo loss that lasts longer than a threshold time,
one of three fail-safe conditions can be applied to a current output: Lo, Hi, No Change. The Lo setting
forces the current output to be 0 (in 0-20 mA operating mode) or 4 mA (in 4-20 mA operating mode) in a
fail-safe condition. The Hi setting forces the output to be 20 mA. The No Change setting means no
change is made to the current output in a fail-safe condition (i.e., whatever was being transmitted before
the problem was detected will continue to be transmitted). No Change is the default. A fail-safe condition
remains in effect until the echo loss ends. Note that when the UltraWave Series is in echo loss, the echo
loss is indicated on the display with an asterisk (*).
• Truck — (Flow Only)
- Flow
- Head
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97-1163-01 Rev. D
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