M3LU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
EM-2652-A Rev.2 P. 7 / 9
■ CALIBRATION FLOW CHART
POWER ON
Amber LED
Green LED
Control
Buttons
Red LED
OFF
ON
Blink
RUN MODE
LD2
LD3
A
G
RUN MODE
LD2
LD3
G
R
LD1
LD2
LD3
LD1
LD2
LD3
0% INPUT
CONFIGURED
100% INPUT
CONFIGURED
INPUT
RANGING
MODE
LD1
OUTPUT
RANGING
MODE
LD2
LD3
LD1
LD2
LD3
0% OUTPUT
CONFIGURED
100% OUTPUT
CONFIGURED
G
G R
R
R
R
G
R
R
G
Fine Adjustments ? I/O Ranging ?
HOLD DOWN
MODE
1 – 2 s HOLD DOWN
MODE
> 5s
PRESS
MODE
PRESS
MODE
PRESS
MODE
PRESS
MODE
HOLD DOWN
DOWN
HOLD DOWN
UP
DOWN
UP
MODE
HOLD DOWN
DOWN
HOLD DOWN
UP
When you set 0% or 100% input/output ranges,
keep pressing UP or DOWN button until the
LD1 blinks for approx. 2 seconds and turns off,
which indicates the setup is complete.
If the LED does not change, the entered level may
be inappropriate: e.g. out of usable range, burnout
(wire breakdown).
*For the model M3LU-x/A, the green LED is blinking.
For the model M3LU-x/B, the green LED turns on.
FINE ZERO
ADJUSTMENT MODE
UP or DOWN
FINE SPAN
ADJUSTMENT MODE
UP or DOWN
Apply simulated 0% input signal.
Apply simulated 100% input signal.
Adjust simulated input until the output meter
shows desired 0% output.
Adjust simulated input until the output meter
shows desired 100% output.
LD1*
LD1*
■ ZERO & SPAN ADJUSTMENTS
After the transmitter is installed and operational, fine zero and span tuning can be performed as explained below.
Both zero and span are adjustable within ±15%.
1) Run Mode: Confirm that the green LED is blinking
(model M3LU-x/A) or the green LED turns on (model
M3LU-x/B).
2) Fine Zero Adjustment Mode: Hold down MODE button
for 1 or 2 seconds until the LD1 red LED is ON and the
LD2 green LED is blinking.
Use UP (increase) and DOWN (decrease) buttons to
adjust the output to 0%.
3) Fine Span Adjustment Mode: Press MODE button and
confirm that the LD3 green LED instead of LD2 is
blinking.
Use UP (increase) and DOWN (decrease) buttons to
adjust the output to 100%.
4) Run Mode: When fine adjustment is completed, press
MODE button once and confirm that: the LD1 green LED
is blinking in case of M3LU-x/A; and the LD1 green LED
is ON in case of M3LU-x/B.
Note 1: Calibration steps can be skipped when not needed by
repeating pushing MODE buttons.
Note 2: There is no stated order of setting 0% and 100% levels
or no limitation of entering values for multiple times
within one step of Calibration Mode. Signal level is
stored each time the respective UP or DOWN button is
pressed.
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