M3LLC
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-2654 Rev.17 P. 6 / 8
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) DIP SW setting: Check that the switches are set to ap-
propriate positions.
3) Power input voltage: Check voltage across the terminal
11 – 12 with a multimeter.
4) Input: Check that the input signal is within 0 – 100% of
full-scale.
5) Output: Check that the load resistance meets the de-
scribed specifications.
I/O RANGING & FINE ADJUSTMENTS
After the DIP SW setting is complete, set up the precise
input and output range using the front control buttons. Be
sure that the front control button function is enabled with
the DIP switch setting.
The front LEDs’ colors and blinking patterns help you to
easily identify the transmitter’s status and confirm the set-
up actions in each step of Calibration Modes. Please read
the following explanations referring to “Calibration Flow
Chart”.
■
PREPARATION
1) Mount the DIP-SW-configured M3LLC on to a DIN rail.
2) Connect the M3LLC to a simulator and a multimeter and
to a power source as shown below.
3) Turn the power supply on and wait for 10 minutes.
1
2
7
8
11
12
M3LLC
Multimeter
Simulator
Shortcircuit
+
–
Power Source
+ –
+
–
5
■
INPUT & OUTPUT RANGING
[Example] Setting input to 0 – 10 mV, output to 1 – 5 V DC
1) Run Mode: Confirm that the green LED is blinking
(model M3LLC-x-x/A) or the green LED turns on (model
M3LLC-x-x/B).
2) Input Ranging Mode: Hold down MODE button for longer
than 5 seconds until the LD1 red LED is ON and the LD2
red LED is blinking.
3) 0% Input Ranging: Apply the desired minimum input lev-
el (e.g. 0 mV) from the simulator and hold down DOWN
button until the LD1 blinks for approx. 2 sec. and then
turns OFF. When you release the button, the LD1 is re-
turned to ON.
The blinking LD1 means that the value is stored in the
memory. If LED’s blinking frequency does not change,
the entered level may be inappropriate: too small a span,
or out of usable range (same for all steps).
4) 100% Input Ranging: Apply the desired maximum input
level (e.g. 10 mV) from the simulator and hold down UP
button until the LD1 blinks for approx. 2 sec. and then
turns OFF. When you release the button, the LD1 is re-
turned to ON.
5) Output Ranging Mode: Press MODE button and confirm
that the LD1 red LED is ON and the LD3 red LED in-
stead of LD2 is blinking.
6) 0% Output Ranging: Increase or decrease the simulated
input until the meter shows the desired minimum output
level (e.g. 1 V). Hold down DOWN button until the LD1
blinks for approx. 2 sec. and then turns OFF. When you
release the button, the LD1 is returned to ON.
7) 100% Output Ranging: Increase or decrease the simu-
lated input until the meter shows the desired maximum
output level (e.g. 5 V). Hold down UP button until the
LD1 blinks for approx. 2 sec. and then turns OFF. When
you release the button, the LD1 is returned to ON.
8) Run Mode: When calibration is completed, press MODE
button once and confirm that: the LD1 green LED is
blinking in case of M3LLC-x-x/A; and the LD1 green LED
is ON in case of M3LLC-x-x/B.
■
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 M3LLC-x-x/A) or the green LED turns on (model
M3LLC-x-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 ad-
just the output to 0%.
3) Fine Span Adjustment Mode: Press MODE button and
confirm that the LD1 red LED is ON and the LD3 green
LED instead of LD2 is blinking.
Use UP (increase) and DOWN (decrease) buttons to ad-
just 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 M3LLC-x-x/A; and the LD1 green
LED is ON in case of M3LLC-x-x/B.
Note 1: Calibration steps can be skipped when not needed by
repeating pushing MODE buttons.
Note 2: There is 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. However, for the input ranging, end
always with 100% (UP).
■
TARE ADJUSTMENT
1) Apply tare load to the sensor.
2) Close across the tare command input terminals. Tare ad-
justment value is set so that present sensor input value
equals input 0%.
3) Open the tare command input terminals.
Note: When input calibration or ranging is performed, tare
adjustment value is reset to 0% automatically. Perform
the tare adjustment again.
