KROHNE ALTOSONIC III EN - Manual (Page 26)

ALTOSONIC III 26
4. Functional
checks and
service
4.1 Functional checks The signal converter has several different test functions (Function 2.01.01 to 2.01.05).
4.1.1 Display test Function 2.01.01 Display test
Select function 2.01.01 as described above.
Press right arrow to start.
All segments in the 3 lines of the display are activated sequentially. The test can be terminated by pressing ← key.
4.1.2 Current output test Function 2.02.01 Test, current output I
WARNING – This will affect the current output, and will no longer be process output!
A milliamp-meter must be connected between terminals V+ and I for this test, see the connection diagrams.
Select current value with ↑ key:
0 mA - 4 mA
12 mA - 20 mA
22 mA
The milliamp-meter indicates the current value selected. Press the ← key to terminate the test and display the actual
value again
4.1.3 Frequency output
test
Function 2.02.02 Test, frequency output F
WARNING – this will affect the pulse/frequency output, and will no longer be process output!
An electronic totalizer (EC) must be connected to terminal P. for this test.
Select function 2.02.02. Select frequency value with ← key:
1 Hz - 10 Hz
100 Hz - 1000 Hz
1500 Hz
The totalizer indicates the frequency value selected. Press the ← key to terminate the test and display the actual value
again.
4.1.4 Status output test 2.03.03 Test of the status inputs (if applicable)
Connect a voltage source to terminal I/GND.
Select Function 2.03.03.
Apply a voltage < 5 V and check if the display indicates a '0' level as value.
Apply a voltage >15 V and check if the display indicates a '1' level as value.
Press '<-' to terminate.
4.2 Device information 2.04.00 Device info
Select the 2.04 menu. The various sub-menus (2.04.01 to 2.04.09) will show:
• manufacturer
• model no.
• serial no.
• uP2 hardware no.
• uP2 Software no.
• Front Hardware no.
• DSP Hardware no.
• DSP software no.
• Time count
4.3 Measuring zero flow
value
Set zero flow in the pipeline. Make sure the flow sensor is completely filled with liquid.
Select function 1.01.02 or 3.01.02, ZERO VALUE and set this to MEASUREMENT
Select 1.01.03 or 3.01.03, ZERO CAL, zero calibration will start upon entry of this function.
the zero measurement will take approximately 15 seconds, display indicating BUSY. At the end the display shows
"STORE NO". Use the '^' to select "STORE YES" if desired use the "<-" to store and exit the zero calibration routine.
Remark: if fixed zero value is selected (1.01.02 or 3.01.02) a zero calibration routine is not possible.