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M3LM OPERATING MANUAL EM-2663-B Rev.4
10. CALIBRATION
‘Calibration’ means I/O ranging or output fine adjustments using the front control buttons. M-System’s ‘One-Step-Cal’ cali-
bration technique realizes automatic I/O ranging and adjustment.
This chapter describes flow and operation procedure of the calibration.
You can also carry out the calibration using the PC Configurator Software (model: M3LMCFG). For detailed information,
refer to the M3LMCFG users manual.
10.1 CALIBRATION FLOW
The calibration includes I/O Ranging Mode and Fine Adjustment Mode. Hold down the MODE button to shift each mode
from the RUN Mode. The mode to shift depends on the time to hold down the button.
The following chart shows the calibration flow.
RUN MODE
*
1
Fine Adjustment ?
1 – 2 s
I/O Ranging ?
≥ 5s
FINE ZERO
ADJUSTMENT MODE
or
Press
FINE SPAN
ADJUSTMENT MODE
or
RUN MODE
*
1
OUTPUT
RANGING
MODE
INPUT
RANGING
MODE
Amber LED
Green LED
Red LED
OFF
ON
Blink
MODE button
UP button
DOWN button
Apply simulated
0% input signal.
Hold down
*
2
0% INPUT
CONFIGURED
100% INPUT
CONFIGURED
Hold down
*
2
Hold down
*
2
Apply simulated
100% input signal.
Hold down
*
2
0% OUTPUT
CONFIGURED
100% OUTPUT
CONFIGURED
Hold down
Press
Press
Press
Hold down
Adjust potentiometer
until the output
meter shows
desired 0% output.
Adjust potentiometer
until the output
meter shows
desired 100% output.
*
1 In the RUN Mode, the green LD1 blinks (PC configuration), or turns on (DIP SW configuration).
*
2 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. When you release the button, the LD1 is returned to ON. Therefore hold down the
button until the LD1 turns OFF.
