KROHNE UFM 500 EN - Manual (Page 34)

34
7. Functional checks
7.1 Test functions of UFC 500... signal converter fct.
2.1 to 2.5
7.1.1 Display test, fct. 2.1
•
Select function 2.1 as described in sect. 4.2 and 4.3.
•
Press
↵
key to start display test, duration approx. 30
seconds.
•
All segments in the 3 lines of the display are
activated sequentially.
•
The test can be terminated by pressing the
↵
key.
7.1.2 Test, current output I, fct. 2.2
•
A milliamp-meter must be connected to terminals
I/I+ for this test, see sect. 2.3.2 and 2.3.5, connections
diagram
c.
•
Select fct. 2.2 as described in sect. 4.2 and 4.3.
•
Select current value with
↑
key:
Š 0 mA
Š 2 mA
Š 4 mA
Š 10 mA
Š 20 mA
Š 22 mA
The milliamp-meter indicates the current value selected.
•
Press the
↵
key to terminate the test and display the
actual value again.
7.1.3 Test, frequency output F, fct. 2.3
•
An electronic totalizer (EC) must be connected to;
terminals B1 and B
⊥
for this test, see sect. 2.3.3 and
2.3.5, connections diagram
d.
•
Select function 2.3 as described in sect. 4.2 and 4.3.
•
Select frequency value with
↑
key:
Š
1 Hz
Š 10 Hz
Š 100 Hz
Š1,000 Hz
The totalizer indicates the frequency value selected.
•
Press the
↵
key to terminate the test and display the
actual value again.
7.1.4 Test, status output S, fct. 2.4
An electronic indicator must be connected to terminals
B2 and B
⊥
for this test; see sect. 2.3.4 and 2.3.5,
connection diagram
d. Select fct. 2.4 as described in
sect. 4.2 and 4.3. Select the status with
↑
key:
•
STATUS OFF or
•
STATUS ON.
The indicator indicates the selected status. Press the
↵
-
key to terminate the test and display the actual value
again.
7.1.5 Test, microprocessor, fct. 2.5
•
Select function 2.5 as described in sect. 4.2 and 4.3.
•
Press the
→
key, displayed: TESTING.
•
Approx. 2 seconds test duration, display:
either NO ERROR = signal converter in order
or
ERROR = signal converter possibly defective.
Corrective action: Switch power source briefly off and
repeat test. If error message is still
shown, replace electronic unit, see
sect. 8.1.
7.2 Zero check with UFC 500 ... signal converter
7.2.1 Measure zero value
Set “zero” flow in the pipeline, but make sure that the
primary head is completely filled with fluid.
Key D i s p l a y Description
→
1.0 OPERATION If Entry Code 1 is selected
see fct. 3.6.2, set 9-keystroke
Code 1 now.
→
1.1.0 BASIS.PARAM
.
→
1.1.1 FULL SCALE
3 (2)
∗ →
1.1.4 ZERO SET.
→
VALUE.
MEASU If FIXED.VALUE appears
here, set VALUE. MEASU
(measured value) with
↑
key.
↵
CALIB. NO
↑
CALIB. YES
↵
0.0 PERCENT Zero measurement in
progress (approx. 20 seconds
duration).
Display: actual flowrate in
percent of full-scale range,
max. deviation
±
0.2%; if
greater, check whether
flowrate is actually “zero”.
STORE NO If new value is not accepted,
press
↵
key 5 times = return
to measuring mode.
↑
STORE YES
↵
1.1.4 ZERO SET. Zero set to new value.
4
∗ ↵
........ .................. Measuring mode with new
zero value.
7.2.2 Fixed zero value
If “zero” flow in the pipeline is not adjustable, zero can
be set to a specified fixed value (factory setting).
NOTE: Additional measuring error possible in this case,
to avoid it, see sect. 7.2.1 “measure zero value”.
Key Display Description
→
1.0 OPERATION
If Entry Code 1 is selected see
fct. 3.6.2; set 9-keystroke Code
1 now.
→
1.1.0 BASISPARAM.
→
1.1.1 FULL SCALE
3 (2)
∗ ↑
1.1.4 ZERO SET.
→
FIXED.VALUE If VALUE. MEASU
(measured value) appears
here, set
FIXED.VALUE with
↑
key.
↵
1.1.4 ZERO SET. Zero set to fixed value.
4
∗ ↵
......... ...................... Measuring mode with fixed
zero value.