Installation and Maintenance
3
NOTE:
Load cell adjustment nut has both right
and left hand threads.
9. Lift load cell so that the threaded adapter in
top of load cell lines up with load cell
coupling nut. Turn load cell coupling nut
counterclockwise (looking down from top)
u n t i l t o p o f l o a d c e l l c o u p l i n g n u t i s
approximately 1/4 inch from jam nut.
10. Wi t h s c a l e o n a l eve l s u r fa c e , r e m ove
weighing platter from bottom scale assembly.
Place a level across standoffs on levers and
adjust load cell coupling nut until level reads
plumb. Tighten jam nut-to-load cell coupling
nut. Remove level and replace weighing
platter on scale.
11. Install load cell cable up through hole in
indicator stand/base plate assembly.
Do not twist, bend or kink
load cell cable.
12. Wrap excess cable around cable hooks on
handle.
13. Connect cable from the load cell through the
load cell cable cord grip to connector J1 as
shown in Table 2-1.
14. If using 6-wire load cell cable (with sense
wires), remove jumpers JP1 and JP2 before
reinstalling connector J1 (see Figure 2-3). For
4-wire installation, leave jumpers JP1 and JP2
on.
15. When connections are complete, reinstall
connector J1 on the board and reinstall
indicator back cover.
16. Install cable tie on wrapped up load cell cable
allowing sufficient cable to be able to tilt
indicator head.
The scale is now ready for final adjustment and
calibration.
2.3
Final Adjustment, Calibration and
Troubleshooting
Final adjustment, calibration, and troubleshooting of
the IQ plus 390 indicator can be found in the
IQ plus
390-DC Installation Manual
.
Figure 2-3. IQ plus 390-DC Indicator Board
!
Caution
J1 Pin
Function
1
+SIG
2
–SIG
3
+SENSE
4
–SENSE
5
SHIELD
6
+EXC
7
–EXC
For 6-wire load cell connections, remove
jumpers JP1 and JP2.
Table 2-1. J1 Pin Assignments
1
J3
VR2
XT2
VR3
U12
XT1
U2
JP3
U5
U10
JP1
U1
JP2
C27
C26
C28
C29
C30
C31
J1
U14
R1
C4
C3
C7
R6
U7
C19
C18
R7
C16
R8
R9
C20
C21
D2
R29
R26
R25
C45
C46
C47
R23
C48
C49
U13
C42
DR1
R16
L1
L2
1
1
J4
J5
U8
U3
FLASH RAM
U6
U11
C25
VR1
C15
C22
R10
C9
C10
C11
C14
U9
R11
R13
R12
C24
C58
C65
C64
R44
R45
C63
R42
R43
R41
R40
C62
C61
R38
R39
R28
C56
C60
R36
R37
R35
R34
C59
R30
R31
EMI1
F1
J6
C13
C12
C8
R4
C23
C57
C5A
C44
C41
C43
C53
C52
C17
R24
C51
C6
C5
R3
U4
C2
C1
R2
–EXC
+EXC
SHIELD
–SENSE
+SENSE
–SIG
+SIG
7
6
5
4
3
2
1
LOAD CELL
CONNECTOR
R14
R15
DR2
C34
C35
C36
C37
R19
R20
C33
C38
C39
C40
C32
R17
R18
R21
R22
Keypad Connector
Battery
Input
AC Adapter
Input
To Setup
Switch
250 mA
TR5 Fuse
Microcontroller
+
R5
R10A
R10B
Q1
C50
+
C54
+
C54A
+
D1
C58A
R26B
Q2
R26A
C55
C55A
R27
VR4
