TOWA LCM1010, Руководство по эксплуатации

Страница: 385 / 552

11 ADJUSTMENT METHODS
LCM 1010 Instruction Manual
A CAUTION
A
DANGER
- The following adjustments must be carried out in a no-load
condition. Furthermore, do not operate Hold Frames while
adjustments are underway.
- The following adjustments must be carried out for both the right and
left amplifiers at the same time.
Zero Adjustment of Strain Gauge Amplifiers
& *
- Before starting operation, reconfirm the safety items indicated in the
section 2 “SAFETY”.
- Incorrect adjustments, connections and the like lead to machine
malfunctions and damage. Have a sufficient understanding of the
adjustment methods before carrying out adjustments on the
machine.
(5 )
( 6 )
(7 )
(
8
)
(9 )
i—м
Z E R O
L - F
SP AN
M E A S Q J + C A L
bal
Q
+
©
MONI
- ©
(1) Prepare a digital m ulti-m eter and connect the plugs
D SA -101A
to the (+) and (-) M ONI term inals on the front o f the
strain gauge amplifier.
* Test range DC voltage value [mV]
(2) Turn on the power, and the LED lam p (yellow) will
light up. Carry out preheating fo r approximately 10
minutes.
(3) Put the CAL switch in the “M EAS” position.
(4) With a strain gauge-type converter in a no-load “0”
condition, adjust the output voltage at "OV” A djust
with a zero coarse-adjuststent trim m er (M) so that
О- ’
both o f the balance-display LED lamps (green) go
out. The lamps will-gb out w hen the trimmer is set
to near the m iddle o f the"adjustment range.
Balance adjustm ent is carried out via the -auto-balance switch o r an external
contact (BAL command). In order to prevent operation by m istake, this
adjustm ent is executed by pressing continuously for at least 1.5 seconds.
W hen fine OV adjustm ent is needed, can y out with a zero fine-adjustment
trim m er (F).
Execute auto-balancing once m ore, and m ake sure that the zero-point does not
change.
Carry out adjustm ent in the same w ay for the other amplifiers as well.
Zero-balance w ill be retained even if pow er is turned off.
NOTE When adjustment is complete, be sure to return the CAL
switch to the "MEAS" position.
11-14 TCWA