M2XM2
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-5093 Rev.4 P. 3 / 4
■
CONNECTION DIAGRAM
+
–
OUTPUT
9
12
U(+)
V(–)
POWER
13
14
CONFIGURATOR
JACK
1
5
4
+
–
3
2
1
POTENTIOMETER
max.
min.
WIRING INSTRUCTIONS
■
SCREW TERMINAL
Torque: 0.8 N·m
■
SOLDERLESS TERMINAL
Refer to the drawing below for recommended ring tongue
terminal size. Spade tongue type is also applicable.
Applicable wire size: 0.25 to 1.65 mm
2
(AWG 22 to 16)
Recommended manufacturer: Japan Solderless Terminal
MFG.Co.Ltd, Nichifu Co.,ltd
6 (.24) max
3.3 (.13) max
mm (inch)
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Output range selectors: Check that the switches are at
the appropriate positions according to the output range
model suffix code.
3) Power input voltage: Check voltage across the terminal
13 – 14 with a multimeter.
4) Input: Check voltage across the terminal 4(+) – 5(–) with
a voltmeter to show 0V at the minimum potentiometer
input (0Ω) and the same voltage as that across 1(+) – 5(–)
at the maximum input.
If the potentiometer wires are broken, the output goes
over 100% (below 0% with downscale) due to the burnout
function. Confirm the status indicator LED pattern and
check leadwires in such a case.
5) Output: Check that the load resistance meets the de-
scribed specifications.
6) Status indicator LED: Check that it blinks in a regular
pattern.
ZERO/SPAN ADJUSTMENTS
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, fine zero and span adjustments can
be done to ±5% by pressing UP/DOWN switches enabled
with the zero/span selector switch. Calibrated values are
stored in the non-volatile memory, which will not be lost
even when you turn off power supply to the unit.
Zero and span are respectively set to 0% and 100% at the
factory.
UP/DOWN Switches
The front cover cannot be turned open by 180 deg.
when there is no extra space between units.
Configurator Jack
■
FRONT VIEW (with cover open)
Status Indicator LED
Zero/Span Selector
Top: SPAN
Middle: OFF
Bottom: ZERO
■
LEFT SIDE VIEW
(with cover removed)
Output Range Selectors
[e.g.]
Output code V1
O
N
2
1
3
4
5
6
7
8
O N
2
1
3 4
SW2
ATT
SW3
SW6
SW4
SW7
I
V
I
V
Zero/Span Selector
ZERO
: UP/DOWN switches usable for zero adjustment.
OFF
: UP/DOWN switches unavailable.
SPAN
: UP/DOWN switches usable for span adjustment.
UP/DOWN Switches
UP
:
Pressing UP increases adjusted values.
DOWN
: Pressing DOWN decreases adjusted values.
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HOW TO CALIBRATE THE ZERO
Slide the Zero/Span Selector to the bottom position and
press UP or DOWN switch. Incrementing speed will be
doubled when you keep pressing a switch.
■
HOW TO CALIBRATE THE SPAN
Slide the Zero/Span Selector to the top position and press
UP or DOWN switch. Incrementing speed will be doubled
when you keep pressing a switch.
■
HOW TO RESET
After you calibrated manually with these switches, you
can reset them to its ex-factory state by pressing both UP/
DOWN switches at once.
■
ADJUSTMENT PROCEDURE
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 20 minutes.
1) ZERO: Apply 0% input. Slide the Zero/Span Selector to
the bottom position. Press UP or DOWN switch and ad-
just output to 0%.
2) SPAN: Apply 100% input. Slide the Zero/Span Selector
to the top position. Press UP or DOWN switch and adjust
output to 100%.
3) Check ZERO adjustment again with 0% input.
4) The ZERO and SPAN adjustments are processed in a dig-
ital processor, and therefore they do not interact. Howev-
er, if ZERO value is changed, repeat the above procedure
1) – 3).
