AQ M-Tech AB Ultrasound Controller Manual 15
Select SET mA output to set the assignment of the mA-outputs. There are two mA-outputs: A and
B. They can be assigned to output Normal Measurement Data or All Sensitivities for air sensor 1 or 2.
Normal Measurement Data This is a combination of the analog Ndata (during the time liquid is
indicated) and 6mA whenever air is indicated. Note that Ndata is filtered with very long (1s) time
constant and is too slow to be used for detecting bubbles. The reaction time for the air indication
is 40ms and detection is always minimum 500ms.
8mA – 20mA = Ndata = 0% – 150% (but only during the time Liquid is indicated)
6mA = when Air is indicated
4mA = error
All Sensitivities This is a combination of all sensitivities so that different bubble sizes can be output
to the mA output. The reaction time is 40ms but the bubble indication time is always minimum
500ms regardless of how long the bubble is being detected.
16mA = Liquid (no bubble) 14mA = small bubble
12mA = medium bubble 10mA = big bubble
8mA = very big bubble 6mA = very very big bubble
4mA = error.
Air Sensor start-screen
When power is applied, the Air Sensor start-screen is displayed
showing something like this. On the first line to the right is written AirSens meaning this is Air
Sensor-mode. The first digit to the left indicates Air Sensor 1 and Air Sensor 2. Following the digit
is diagnostic information about each Air Sensor:
--- No Air Sensor is connected and Air Sensor TYPE or DIAMETER is set to no Air Sensor
set Settings are missing
cal Waiting for calibration to be done
CalAir Calibration of air is perhaps good to do (after calibration of liquid)
CalLiq Calibration of liquid is perhaps good to do (after calibration of air)
err 1 Error, no Air Sensor is detected
err 2 Error, NAir too high, see troubleshooting
err 3 Error, VLthld too low, see troubleshooting
err 4 Error, NLiq too low, see troubleshooting
SetErr Error, wrong settings, see troubleshooting
AIR Air or bubble is detected
LIQUID Liquid without bubble is detected.
(LIQUID is blinking if measurement data is higher than 200% suggesting a new calibration may be
advisable). On the second line to the right is written 1234 which shows the state of each of the
four relays. A light digit on dark signifies a closed relay.
ADVANCED SETTINGS
Select Set sensor MODE to set either Air Sensor mode, Level Switch mode, Level Sensor mode or Gel
Sensor mode mode. It determines which sensor can be connected.
Select SIMULATE to simulate detection of air or liquid. Press SELECT button to toggle between
simulation of AIR and LIQ. Press MENU button to change between Air Sensor 1 and 2.
Select RESTORE settings and calibrations to restore all settings and calibrations to factory-settings.
Select PROFIBUS SETTINGS see page 42 (for DP72).
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