Konecranes CU1 - Page 35

26.03.1996 • KHH SEENXL13A
•For Authorized KCI Service Agents Only•
KCI Hoists Corporation reserves the right to alter or amend the above information without notice
Page 35
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
4.35 0
4.35
1005.50
10
110(5.50)
4.20
5.35
0
100
1.35 VDC
+ 0.15 VDC
VDC %
Add the calculated voltage difference (positive or negative) to the 'L 0
step4a
'
and 'L 100
step4a
' voltages and write those down as new 'SL 0' and 'SL100' setting
voltages.
(The aim is to keep the voltage difference between 'full-load' and 'no-load'
the same as with the old CU1 and get the new CU1 to display 'L 00' when
there is no load on the hook.)
13 Switch the power off. Disconnect the load sensor wires (CU1:2,3,4) and
connect the calibrating load sensor (CU1:2,3,4) and a voltage meter
(CU1:2,3). See Figure 1.
Continue on step 6 and setup the new CU1 again with the new
calculated 'SL 0' and 'SL100' setting voltages.
Example (see Figures 2a, 2b and 2c):
a) The 0 % and 100 % voltages measured were 4.20 and 5.35 VDC (step 4).
b) However, after replacing the CU1 the 'no load' value displayed was 10 %
(L 10). The remeasured 0 % voltage on step 11 was 4.35 VDC. Thus, the
calculated voltage difference between the 'L 0
step4a
' (4,35 VDC) and 'L 0
step11
'
(4,20 VDC) voltages was +0.15 VDC (step 12).
c) Now the new CU1 has to be recalibrated with the calculated 'full load' ('SL100'
= 5,50 VDC) and 'no load' ('SL 0' = 4,35 VDC) voltages (step 13).
a) b) c)
'L 0'- and 'L 100'-voltages and loads 'L 0'-voltage and load displayed 'L 0'-and 'L 100' voltages
displayed with the original CU1 with the new CU1 and loads displayed after
(see step 4) (see step 10) recalibration (see step 11)
Figure 2. An example on recalibration
Note:
Note:Note:
Note: If a CU1 has been replaced, the old supervisory values (SWP,
If a CU1 has been replaced, the old supervisory values (SWP,If a CU1 has been replaced, the old supervisory values (SWP,
If a CU1 has been replaced, the old supervisory values (SWP,
Runtime, Starts and Overloads) have to be entered into the new
Runtime, Starts and Overloads) have to be entered into the newRuntime, Starts and Overloads) have to be entered into the new
Runtime, Starts and Overloads) have to be entered into the new
CU1.
CU1.CU1.
CU1.
voltage
difference
between'L 0
step4a
' and
'L 0
step11
'
Full load
No load