26
Magtrol Load Monitoring Units LMU 212 & 217
Chapter 3 – Calibration
1 2 3
4 5 6
7 8
OFF
ON
9 10
SWB
micro-switches
REL1
REL2
REL2 LED
REL1 LED
Fig. 3–3 Location of the relays REL1 and REL2 on the load monitoring unit board
note :
Record the values U
O/P level1
and F
level1
on the configuration and
calibration form (see
Appendix A
).
3.1.5.2
Adjustment of the detection threshold U
level2
1. Connect a digital millivoltmeter between terminals 15 (U
O/P
) and 9 (0 V) of the load
monitoring unit.
2. Adjust the potentiometer P9 to obtain a reading of U
O/P level2
with an accuracy of ±20 mV.
Figure 3–1
indicates where the potentiometers P1 to P10 are located.
3. Turn the potentiometer P5 until the LED on REL2 goes on.
Figure 3–3
indicates the location
of this LED.
4. Turn the potentiometer P5 slowly until the LED of REL2 goes off: the detection level will
then be switched off.
note :
Record the values U
O/P level2
and F
level2
on the configuration and
calibration form (see
Appendix A
).
w
arning
:
•
a
fter
having
adjusted
the
deteCtion
thresholds
plaCe
the
miCro
-
switCh
swb9
on
off.
•
t
he
load
monitoring
unit
will
only
be
operational
when
the
miCro
-
switCh
swa10
is
on.
Содержание LMU 212
Страница 48: ...41 Appendix B CE Conformity Declaration...
