M2LPM
P. / 6
EM-5054-A Rev.2
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
13 – 14 with a multimeter.
4) Input: Check that the input signal is within 0 – 100% of
full-scale.
If the potentiometer wires are broken, the output goes
over 100% (below 0% with downscale burnout) due to
burnout function. Confirm the status indicator LED pat-
tern and check leadwires in such a case.
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.
The front LEDs’ colors and flashing 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” in the next page.
■
PREPARATION (e.g. Input 0 – 500Ω, Output 1 – 5V)
1) Mount the DIP-SW-configured M2LPM on to a DIN rail.
2) Connect the M2LPM to a simulator and a multimeter
and to a DC power source as shown below.
3) Turn the power supply on and wait for 10 minutes.
■
INPUT & OUTPUT RANGING
[Example]
1) Run Mode: Confirm that the LD1 green light is blink-
ing.
2) Input Configuration Mode: Press MODE button for long-
er than 5 seconds until the LD1 red light is ON and the
LD2 red light is blinking.
3) 0% Input Ranging: Apply the desired minimum input
level (e.g. 0Ω) from the potentiometer and push DOWN
button until the LD1 flashes for approx. 2 sec. and then
turns OFF. When you release the button, the LD1 is re-
turned to ON.
The flashing LD1 means that the value is stored in the
memory. If the LED 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. 500Ω) from the potentiometer and push UP
button until the LD1 flashes for approx. 2 sec. and then
turns OFF. When you release the button, the LD1 is re-
turned to ON.
5) Output Configuration Mode: Push MODE button and
confirm that the LD3 red light instead of LD2 is blink-
ing.
6) 0% Output Ranging: Increase or decrease the simulated
input until the meter shows the desired minimum out-
put level (e.g. 1V). Push DOWN button until the LD1
flashes 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. 5V). Push UP button until the LD1
flashes for approx. 2 sec. and then turns OFF. When you
release the button, the LD1 is returned to ON.
8) Run Mode: Programming complete, push MODE button
and confirm that only the LD1 green light is blinking.
■
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 LD1 green light is blink-
ing.
2) Fine Zero Calibration Mode: Press MODE button for 1
or 2 seconds until the LD1 red light is ON and the LD2
green light is blinking.
3) Use UP (increase) and DOWN (decrease) buttons to ad-
just the output to 0%.
4) Fine Span Calibration Mode: Push MODE button and
confirm that the LD3 green light instead of LD2 is blink-
ing.
5) Use UP (increase) and DOWN (decrease) buttons to ad-
just the output to 100%.
6) Run Mode: Push MODE button and confirm that only the
LD1 green light is blinking.
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.
1
8
9
12
13
14
M2LPM
Multimeter
+
–
AC Power Source
5
+
–
3
2
1
POTENTIOMETER
max.
min.
