KROHNE Altosonic III, Installation And Operating Instructions Manual

Page: 23 / 43

Installation and operating instructions
23 ALTOSONIC III
Submenu 3.03.00 Display
Function 3.03.01 Display of flow
To display the flow, three options are available
Rate; flow is shown with the unit as set in function 3.01.01
Percentage; flow is shown as a percentage of the full scale as set in 3.01.01
No display; no flow is shown.
Function 3.03.06 Unit for velocity of sound
The display of the velocity of sound, as described in Function 3.01.11 through 3.02.12.
The following units can be applied:
NO DISPLAY no display of velocity of sound
m/s meter per second
feet/s feet per second
Function 3.03.07 Cyclic display of measured values
Whenever more than one measured value is to be displayed (e.g. flow rate and totalizer), each value can be selected
manually by pressing the
↑

key, or the values can be alternately displayed each 5 seconds by turning the cyclic display
function on. This also includes the display of various readings as described in Function 3.03.08 through 3.03.11.
Function 3.03.08 Display error messages
Enable/disable the display of error messages as described in section 5.1. When enabled, the converter display will
FLASH when an error occurs, and the error code will be displayed. It will continue to flash until the alarm is
acknowledged or cleared. An unacknowledged alarm will be displayed with 3 horizontal lines in front of the error
message. Acknowledging the alarm will remove the lines. If the alarm is acknowledged but the cause is not removed
the error will stay in the error list. To remove the error from the list the cause must be removed and the error must be
reset. When it is turned off, the compass display indicates errors are present, but the display will not flash.
Function 3.03.11 Display gain
Enable/disable the display of the signal level from the sensors. For each measuring path this level is displayed as a
gain value 0 dBV through 80 dBV at the input amplifier.
Submenu 3.04.00 Current output
Function 3.04.01 Function of current output
The current output can be programmed for the following functions:
•
OFF switched off, current output steady at current value for 0 % scale, see Function 3.04.03 ACT FLOW
proportional with the actual volume flow, see Function 3.01.0.1 FULL SCALE.
•
F/R IND forward/reverse flow indication, see Function 3.01.10, 100 pct mA value for forward flow, 0 pct mA value
for reverse flow, see Function 3.04.03 through 3.04.05.
•
VOS proportional with the velocity of sound, see Function 3.01.11 through 3.01.12.
•
SIGN LEVEL proportional with the signal level, see Function 3.03.11.
Function 3.04.02 Direction of current output
Only available when ACT FLOW is selected in Function 3.04.01. When FORWARD is selected, the current output will
only be active when the flow is in the forward flow direction as defined in Function 3.01.10 FLOW DIR, while when
BOTH is selected, the current output will be active forward and reverse flow direction. Use F/R SPEC to indicate the
reverse flow in the range from 0 mA through 0 pct mA (see Function 3.04.04 0 pct). I.e. when the flow goes from the
forward direction to the negative direction, the current output will pass the "0 pct" mA value down to 0 mA, where it
stops.