Amada WELD CHECKER MM-400A User manual

AA04OM1192558-15
OPERATION MANUAL
Original instructions
WELD CHECKER®
MM-400A

MM-400A
Contents
1
Thank you for your purchase of our Weld Checker MM-400A.
Please read this manual carefully to ensure correct use. Keep the manual handy after
reading for future reference.
Contents
1. Special Precautions ........................................................................................................ 1-1
(1) Safety Precautions....................................................................................................... 1-1
(2) Precautions for Handling ............................................................................................. 1-4
(3) Model-Specific Function .............................................................................................. 1-4
(4) Use of Printer............................................................................................................... 1-4
(5) On Disposal ................................................................................................................. 1-4
(6) Warning Labels............................................................................................................ 1-5
2. Features ........................................................................................................................... 2-1
3. Packaging ........................................................................................................................ 3-1
(1) Accessories ................................................................................................................. 3-1
(2) Options ........................................................................................................................ 3-1
a. For MM-400A-00-00/00-01.............................................................................................................3-1
b. Exclusively for MM-400A-00-00 .......................................................................................................3-2
c. Exclusively for MM-400A-00-01 .......................................................................................................3-2
4. Name and Functions of Each Section ............................................................................. 4-1
(1) Front ............................................................................................................................ 4-1
(2) Rear............................................................................................................................. 4-2
5. Operation Flow ................................................................................................................ 5-1
6. Installation and Connections ......................................................................................... 6-1
(1) Installing the MM-400A ................................................................................................ 6-1
(2) Preparations for Measurement – Connection between the MM-400A and
Measurement Devices ...................................................................................................... 6-2
a. Connecting the Toroidal Coil and the Voltage Detection Cable ...........................................................6-2
b. Connecting the Displacement Sensor (Force/displacement-equipped specification)...........................6-5
c. Connecting the Force Sensor (Force/displacement-equipped specification) .......................................6-8
d. When Using an External ±10 V Voltage Input (Force/displacement-equipped specification).............6-11
e. When Using an External 4 to 20 mA Current Input (Force/displacement- equipped specification) ....6-12
f. When Using a Shunt Resistor (Force/displacement- equipped specification)....................................6-13
7. Basic Operation............................................................................................................... 7-1
(1) Startup ......................................................................................................................... 7-1
(2) Changing the Display Language.................................................................................. 7-2
(3) Basic Usage of the MM-400A ...................................................................................... 7-2
(4) Shutdown..................................................................................................................... 7-7
8. Operation Screens .......................................................................................................... 8-1
(1) Operation Screen Organization ................................................................................... 8-1
(2) Description of the Operation Screens.......................................................................... 8-4
a. MENU Screen......................................................................................................................................8-4
b. MEASUREMENT Screen.....................................................................................................................8-6
c. VIEW Screen .......................................................................................................................................8-9
d. WAVEFORM Screen .........................................................................................................................8-14

MM-400A
Contents
2
e. COMPARATOR Screen.....................................................................................................................8-18
f. ENVELOPE Screen ...........................................................................................................................8-21
g. HISTORY Screen ..............................................................................................................................8-37
h. PRINT Screen....................................................................................................................................8-41
i. USB Screen .......................................................................................................................................8-45
j. ALL CYCLE Screen ...........................................................................................................................8-56
k. FORCE TIMING Screen ....................................................................................................................8-61
l. BASIC SETUP Screen.......................................................................................................................8-64
m.EXTEND SETUP Screen ...................................................................................................................8-84
n. SYSTEM SETUP Screen.................................................................................................................8-103
o. EXT INPUT/OUTPUT Screen ..........................................................................................................8-113
p. COMMUNICATION Screen .............................................................................................................8-123
q. INTERNAL MEMORY Screen..........................................................................................................8-130
r. SEAM WAVEFORM Screen ............................................................................................................8-135
s. SEAM SETUP Screen .....................................................................................................................8-137
9. Measurement ................................................................................................................... 9-1
(1) Measuring Current (Current Flow Time)/Voltage......................................................... 9-1
(2) Measuring Displacement (Force/displacement-equipped specification function) ........ 9-7
(3) Measuring Force (Force/displacement-equipped specification function)................... 9-12
(4) Measuring Current/Voltage after FORCE INITIAL..................................................... 9-16
(5) Continuously Measuring Displacement, Force and External Input
(Force/displacement-equipped specification function) .................................................... 9-22
10. Interface ......................................................................................................................... 10-1
(1) Connection Diagram of the External I/O Signals ....................................................... 10-1
a. Input Connector .................................................................................................................................10-1
b. Output Connector (D-Sub, 37-pin, female) ........................................................................................10-2
(2) Description of the External I/O Signals...................................................................... 10-3
a. Input Connector (D-Sub, 25-pin, female) ...........................................................................................10-3
b. Output Connector (D-Sub, 37-pin, female) ........................................................................................10-5
(3) Connection of Input Signals....................................................................................... 10-7
a. Connection with device having a contact input (when using internal power supply) ..........................10-7
b. Connection with device featuring NPN open collector output (when using internal power supply) ....10-7
c. Connection with device featuring PNP current output (when using external power supply)...............10-8
d. Connection with device featuring NPN open collector output (when using external power supply) ...10-8
(4) Interface of Other Connectors ................................................................................... 10-9
a. Displacement sensor connector.........................................................................................................10-9
b. Displacement connector (Mitutoyo, Ono Sokki, KEYENCE, HEIDENHAIN, 10-pin) ..........................10-9
c. Force sensor connector .....................................................................................................................10-9
d. Multiconnector .................................................................................................................................10-10
e. Communication connector (RS-232C/485) ......................................................................................10-10
11. Timing Chart .................................................................................................................. 11-1
(1) Schedule Number Selection ...................................................................................... 11-1
(2) NO CURR Operation ................................................................................................. 11-2
(3) Internal Processing Time ........................................................................................... 11-4
(4) Judgment Output ....................................................................................................... 11-5
(5) Single-Directional Communication, Single-Directional Communication Time of
Measured Value.............................................................................................................. 11-6
(6) Bi-Directional Communication after Measurement .................................................... 11-7
12. Data Communication .................................................................................................... 12-1
(1) Data Transfer............................................................................................................. 12-1
(2) Configuration ............................................................................................................. 12-2
a. RS-232C ............................................................................................................................................12-2
b. RS-485...............................................................................................................................................12-2
c. Ethernet .............................................................................................................................................12-3
(3) Communication Protocol (Single-Directional Communication) .................................. 12-7
(4) Communication Protocol (Bi-Directional Communication)....................................... 12-22
(5) Code Table of Communication and USB Data ........................................................ 12-67

MM-400A
Contents
3
13. Error List and Maintenance .......................................................................................... 13-1
(1) Troubleshooting......................................................................................................... 13-1
(2) Replacing the Battery ................................................................................................ 13-7
a. Necessary items ................................................................................................................................13-7
b. Maintenance parts .............................................................................................................................13-7
c. Replacement procedure.....................................................................................................................13-7
(3) Replacing the Fuse.................................................................................................. 13-10
a. Maintenance parts ...........................................................................................................................13-10
b. Replacement procedure...................................................................................................................13-10
14. Specifications ................................................................................................................ 14-1
(1) Measurement Specification ....................................................................................... 14-1
(2) Specification of the MM-400A.................................................................................... 14-6
15. Calibration...................................................................................................................... 15-1
16. Outline Drawing............................................................................................................. 16-1
(1) MM-400A ................................................................................................................... 16-1
(2) Displacement Sensor................................................................................................. 16-2
a. LG200-110 Type, Mitutoyo ................................................................................................................16-2
b. LGK-110 Type, Mitutoyo (Discontinued)............................................................................................16-3
c. LG100-125 Type, Mitutoyo ................................................................................................................16-4
d. GT2-P12 Type, KEYENCE ................................................................................................................16-5
e. ST1278 Type, HEIDENHAIN .............................................................................................................16-6
17. Schedule Data Table ..................................................................................................... 17-1
Index ..........................................................................................................................................1
EU Declaration of Conformity

MM-400A
1. Special Precautions
1-1
1. Special Precautions
(1) Safety Precautions
Before using the weld checker, please read through the Safety Precautions carefully to
ensure proper use.
The precautions listed here are designed to ensure safe use and proactively prevent
risks and damage to the user and other people. All precautions are critical for safety.
Please read them all.
The hazard signs have the following meanings:
Mishandling may cause imminent risk of death or serious
injury.
Mishandling may cause risk of death or serious injury.
Mishandling may cause risk of injury and physical
damage.
These signs represent “DON’Ts.” They warn of actions not
covered by the product warranty” in the previous
document.
These signs represent “DOs" which must be observed by
the product user.
A sign within a triangular border indicates that a hazard
(danger, warning or caution) is present.
DANGER
WARNING
CAUTION

MM-400A
1. Special Precautions
1-2
NEVER ATTEMPT to disassemble, repair or modify the instrument.
Do not touch any parts inside the instrument. Failure to observe this may result
in an electric shock or fire.
For battery replacement, inspection or repair, please contact your dealer or us.
NEVER burn, destroy, cut, crush or chemically decompose the
instrument.
This product incorporates parts containing gallium arsenide (GaAs).
DO NOT place your hands between the electrodes.
When welding, be extremely careful not to get your fingers or hand caught in the
electrodes.
During or immediately after welding, DO NOT touch the welded areas or
electrode.
The welded areas of the workpiece, the electrodes and the welding machine’s
arm are extremely hot. To prevent burns, do not touch these areas.
Ground the instrument.
If the Power Supply is not grounded, you may receive an electric shock in the
event of malfunction or current leak. Be sure to perform grounding work.
ALWAYS use the specified power supply.
Failure to use the power supply specified in the Instruction Manual may result in
a fire or electric shock.
Use the specified cables and connect them securely.
Failure to do so or improper connection may result in a fire or electric shock.
Keep the power and connection cables free of damage.
Do not walk on, twist or tug the cables.
Damaged cable may result in an electric shock, short circuit, or fire.
For repair or replacement, contact your dealer or us.
In the event of an anomaly, STOP the operation.
Continuing the operation with anomalies such as a generation of fumes, a
burning odor, strange noise, or overheating unattended may result in an electric
shock or fire. In the event of the above or other anomaly, immediately contact
your dealer or us.
STAY AWAY from the instrument if you have a pace maker.
If you have a pacemaker, do not approach a welding machine in operation or
the immediate area unless your doctor has given consent.
Welding machines generate a magnetic field which interferes with the operation
of a pacemaker.
ALWAYS wear appropriate work clothing.
Wear protective gear such as gloves, a long-sleeved top and leather apron.
Surface flash and expulsion can cause burns if it contacts the skin.
DANGER
WARNING

MM-400A
1. Special Precautions
1-3
ALWAYS wear protective goggles.
Directly looking at surface flash and expulsion during welding can temporary
impair vision. Welding spatter can cause permanent eye damage, including
blindness.
DO NOT splash water.
Electrical parts may cause an electric shock or short circuit if they become wet.
Keep the area clear of flammable objects.
Surface flash and expulsion generated during welding may ignite flammable
objects, resulting in a fire. If work involves use of flammable items, place a
non-flammable cover over such items.
DO NOT cover the instrument with a blanket or cloth.
During operation, do not cover the instrument with a blanket or cloth. This may
lead to the instrument overheating and catching fire.
Wipe off dust from the power plug and securely insert it all the way.
Dust or improper insertion may lead to the plug heat up and catch fire.
Install the instrument on a firm and level surface.
Injury may result if the equipment falls or is dropped.
Do not sit on or place objects on the instrument.
Failure to observe this precaution may lead to malfunction.
Hold the power plug when removing or inserting it.
Removing the power plug by pulling on the cable may damage the power cable,
resulting in an electric shock or causing the cable to catch fire.
If you do not use the instrument for extended periods, remove the power
plug from the outlet.
Failure to do so may deteriorate the insulation, resulting in an electric shock,
current leakage or fire.
Provide fire extinguishers.
Provide fire extinguishers at the welding site as a precautionary measure.
Perform maintenance and inspection on a regular basis.
Perform maintenance and inspection regularly and repair damaged areas and
parts before using the instrument.
Wear soundproof earmuffs.
Loud noise may impair hearing.
CAUTION

MM-400A
1. Special Precautions
1-4
(2) Precautions for Handling
■Avoid the following locations when installing the instrument:
•Humid (above 90%) locations
•Extremely hot (above 45°C) or cold (below 0°C) locations
•Near a high noise source
•Location where chemical substances, etc. are handled
•Location where condensation occurs
•Dusty location
•Location exposed to direct sunlight
•Location that is inclined, insecure, unstable, or weak
■Check the voltage and power frequency before installation.
■Keep the exterior clean with a soft cloth or cloth lightly dampened with water.
For stains, clean them off using a diluted neutral detergent or alcohol. Do not
use thinner or benzene as they may cause discoloration or deformation.
■To prevent malfunction, do not allow any foreign objects such as screws or
coins to enter the instrument.
■Operate the instrument according to the procedure described in the Operation
Manual.
■Operate the switches and buttons with care. Rough operation or the use of a
tool or pen tip may result in damage or malfunction.
(3) Model-Specific Function
The functionality given for “force/displacement-equipped specification” in the
operation manual is available only with the corresponding model. Other functions
available are the same as those of the standard model.
Product model MM-400A-00-00 MM-400A-00-01
Standard (no force/displacement) 
Force/displacement-equipped 
(4) Use of Printer
A tape is adhered to the printer on the MM-400A so that the lid does not open
during transportation. Peel the tape before using.
(5) On Disposal
This product incorporates parts containing gallium arsenide (GaAs). At the time
of disposal, separate it from general industrial waste or domestic waste and carry
out the disposal in accordance with applicable laws and regulations.

MM-400A
1. Special Precautions
1-5
(6) Warning Labels
A warning label is pasted on the instrument for safe use. The pasting place and
meaning of each label are as shown below.
注 意
CAUTION
CONNECT GROUNDING WIRE.
アース線を接続する事
注 意
DO NOT OPEN COVER.
TOUCHING THE INSIDE
MAY CAUSE AN ELECTRIC SHOCK.
CAUTION
感電の恐れあり
カバーを開けるな
Pasting place: Top cover
Meaning: Caution for
grounding wire
connection
Pasting place: Top cover
Meaning: Danger of
electric shock

MM-400A
2. Features
2-1
2. Features
The Weld Checker MM-400A is a measuring instrument designed for stationary resistance
welding machines.
The instrument can measure the current, voltage, current flow time, force*1, displacement*1,
external voltage input (max. ±10 V)*1 and external current input (4 to 20 mA)*1 and display
their waveforms.
(*1: Force/displacement-equipped specification function. You can select to measure external
voltage input or external input current by setting.)
The LCD screen ensures clear viewing of the welding current and force waveforms for
optimal welding quality control. Further, it is equipped with a printer, allowing to print
measured values and waveforms without having to attach an external printer.
The MM-400A offers the following features:
•Easy to use with a touch panel
Easy setting through the menu selection system on the 5.7-inch color touch panel.
•ISO17657-compliant measurement
In addition to the arithmetic mean RMS which is a conventional calculation system, the
RMS in a whole current flow time which is the ISO17657-compliant calculation system can
be selected. For the ISO17657-compliant measurement, the dedicated ISO-compliant
toroidal coil is required.
•Extensive waveform display capabilities
Incorporates a zoom display function, which permits the user to change the spacings of
the X-axis (time) and Y-axis (force/current) freely, and a cursor measurement function, a
function for measuring values between parts of the waveforms by moving the horizontal
cursor.
•Optimal waveform redisplay (FIT) capability
If the waveform is moved or zoomed off the screen, the instrument can resize the
waveform to its optimal size and redisplay it on screen.
•Simultaneous measurement of force and welding current during current flow
(Force/displacement-equipped specification function)
You can measure the force and other measurement items during current flow
simultaneously using the welding head which incorporates a force sensor in the pressure
follow-up mechanism. You can also measure the force and welding current during current
flow simultaneously using the optional current/force sensor (MA-770A/771A), as
conventionally.
•Storing measured values and waveforms
You can store measured values and waveforms in USB or built-in flash memory.
•Managing measurement data with PC
You can transmit measurement data to your PC through the RS-232C, RS-485 or
Ethernet communication.
•Supports a wide range of welding machines
The instrument supports single-phase AC, DC inverter, AC inverter, and transistor welding
machines.
•Supports multiple languages
Languages available are Japanese, English, Chinese, Korean, German, French, and
Spanish.

MM-400A
2. Features
2-2
•Envelope function
The envelope function (making the OK/NG judgment by comparing a waveform within an
allowable range and a monitored waveform) enables management with waveforms in
addition to conventional measured values.
•Measurement with seam current
Measures current/voltage in AC welding or voltage in DC welding with a max. 5-minute
moving measurement.

MM-400A
3. Packaging
3-1
3. Packaging
Check the contents of the package. In the case of damaged or missing items, please contact
us.
(1) Accessories
The model numbers of accessories are subject to change without notice. Depending on
the part to be changed, the mounting screw shape may change and a necessary tool
may be different. For the latest parts information, contact a nearest sales office.
Item
Model
Q’ty
Voltage detection cable SK-1193301 (cable length of 3 m) 1
Thermal paper NPIT5838 1
Connector
(D-Sub, 25-pin,
male)
Case HDB-CTH(10) 1
Plug HDBB-25P(05) 1
Connector
(D-Sub, 37-pin,
male)
Case HDC-CTH(10) 1
Plug HDCB-37P(05) 1
Operation manual AS1192560(OM1192557,OM1192558) 1
(2) Options
a. For MM-400A-00-00/00-01
Item
Model
Power cable*1
KP-35 KS-16A SVT#18×3 B-TYPE
(3-pin plug, for 100–120 V AC) (cable length 3 m)
KP244 VCTF3*1.25 KS16D 3m Gray
(Japan, for 200 V AC) (cable length of 3 m)
CEE3P-W-1.8
(round plug, for 200–240 V AC) (cable length of 1.8 m)
3-pin/2-pin conversion
adapter for power
cable
KPR-24(SB)-B (for 100–120 V AC)
ISO toroidal coil
MB-800M-00 (approx. 250 mm in dia.)
1x sensitivity coil (with 800 mm bracket) (cable length 3
m)
MB-400M-00 (approx. 120 mm in dia.)
1x sensitivity coil (with 400 mm bracket) (cable length
of 3 m)
ISO toroidal coil
extension cable*2
SK-1194039 (cable length of 2 m)
SK-1194040 (cable length of 5 m)
SK-1194041 (cable length of 10 m)
SK-1194042 (cable length of 20 m)

MM-400A
3. Packaging
3-2
Item Model
Toroidal coil*3
MB-800K-00 (approx. 250 mm in dia.)
1x sensitivity coil (with 800 mm bracket) (cable length
of 3 m)
MB-400K-00 (approx. 120 mm in dia.)
1x sensitivity coil (with 400 mm bracket) (cable length
of 3 m)
MB-45F-00 (45 mm in inner dia.)
10x sensitivity coil (mold type) (cable length of 3 m)
Toroidal coil
conversion cable*3 SK-1193305 (cable length of 0.5 m)
Voltage detection
conversion cable*4 SK-1193599 (cable length of 0.1 m)
RS-232C
communication cable
C06N-09MS-09FS-CROSS-WS15
(cable length of 1.5 m, 9-pin, male/female)
RS-485 connector L-04742-001 (Connector (D-Sub 9-pin, male))
LAN cable KB-FL6A-03BL (cable length of 3 m)
Communication software MA-725A-00-00
*1: Exclusively for the MM-400A. Do not use for other devices.
*2: For extending the MB-400M/800M.
*3: Toroidal coil conversion cable SK-1193305 is required for connecting to the
MM-400A.
*4: The conversion cable is required for connecting an old type voltage detection
cable (42265).
b. Exclusively for MM-400A-00-00
Item Model
I/O conversion cable
(used for conversion of
external I/O signals when
replacing the MM-370
series with MM-400A)
SK-1201954 (cable length of 0.15 m)
c. Exclusively for MM-400A-00-01
Item
Model
Shunt resistor DS 500A/100MV (range between 25 A and 500 A)
DS 1000A/100MV (range between 50 A and 1000 A)
Current/force sensor
(put between electrodes for
measurement)
MA-770A-01 (4903 N (500 kgf) max.)
MA-771A-01 (9806 N (1,000 kgf) max.)
Replacement plate*1 Z-04715-002 (with groove)
Z-04715-003 (flat)
Force sensor
(put between electrodes for
measurement)
MA-520B-00 (98.06 N (10 kgf) max.)
MA-521B-00 (980.6 N (100 kgf) max.)
MA-522B-00 (9806 N (1,000 kgf) max.)

MM-400A
3. Packaging
3-3
Item Model
Force sensor connecting
cable*2 SK1200686
Load cell (force sensor)
*3
(can be built in a head)
LS-20NB (Rating: 20 N) *9
LS-50NB (Rating: 50 N) *9
LS-200NB (Rating: 200 N) *9
LS-500NB (Rating: 500 N) *9
LS-2000NB (Rating: 2000 N) *9
LS-5000NB (Rating: 5000 N) *9
Load cell conversion
cable*3
SK-1200820 (cable length of 2 m)
SK-1200821 (cable length of 3 m)
SK-1200822 (cable length of 4 m)
Load cell (force sensor)
*4 (Kyowa Electronic
Instruments)
(can be built in a head)
LMA-A-100N-P (Rating: 100 N) *9
LMA-A-200N-P (Rating: 200 N) *9
LMA-A-500N-P (Rating: 500 N) *9
LMA-A-1KN-P (Rating: 1000 N) *9
Load cell conversion
cable*3 SK-1201977 (cable length of 0.15 m)
Multiconnector (for
external ±10 V voltage/ 4
to 20 mA current)
SRCN6A21-16P
Displacement sensor
(Mitutoyo) LGK-110 (10 mm) (cable length of 2 m) *9 *13
Displacement sensor
extension cable*5 902434 (cable length of 5 m)
Displacement sensor *10
(Mitutoyo)
LG200-110 (10 mm) (cable length of 2.5 m) *9
LG100-125 (25 mm) (cable length of 2 m)
LG100-150 (30 mm) (cable length of 2 m) *11
Displacement sensor
conversion cable*10 SK-1211379 (cable length of 0.15 m)
Displacement sensor
extension cable*12 No.21HZA197 (cable length of 5 m)
Displacement sensor
(KEYENCE)
Contact type sensor
head*6
GT2-P12 (12 mm)
Sensor head cable*6 GT2-CH2M (cable length of 2 m) *9
Mounting amplifier
unit*6 GT2-71D
Displacement sensor
relay connector*6 SRCN6A16-10P
Displacement sensor*7
(HEIDENHAIN)
77066186 *9
ST1278 (12 mm) (cable length of 1.6 m)
Displacement sensor
conversion cable*7 SK-1179208 (cable length of 0.15 m)

MM-400A
3. Packaging
3-4
Item Model
Displacement sensor*8
(Ono Sokki)
GS-1830A (30 mm) (cable length of 1.9 m)
GS-1813A (13 mm) (cable length of 1.9 m)
Displacement sensor
relay cable*8 SK-1194374 (cable length of 0.15 m)
I/O conversion cable
(used for conversion of
external I/O signals when
replacing the MM-370
series with MM-400A)
SK-1201953 (cable length of 0.15 m)
*1: Used with the current/force sensor.
*2: Connecting cable when using MA-520-01, MA-521-01 and MA-522-01. Not
required when using MA-520B-00, MA-521B-00 and MA-522B-00.
*3: Load cell conversion cable SK-1200820, SK-1200821 or SK-1200822 is
required.
*4: Load cell conversion cable SK-1201977 is required.
*5: Extension cable for LGK-110. Use as needed.
*6: A combination of the sensor head, sensor head cable, mounting amplifier unit,
and relay connector is required.
*7: Displacement sensor conversion cable SK-1179208 is required.
*8: Displacement sensor relay cable SK-1194374 is required.
*9: Load cell and displacement sensor corresponding to our follow-up mechanism
element. (Some are special order items.)
*10: Displacement sensor conversion cable SK-1211379 is required.
*11: The measurement range of LG-100-150 is 50 mm, but it will be 30 mm when
connected to the MM-400A.
*12: Extension cable for LG200-110, LG100-125 and LG100-150. Use as needed.
*13: LGK-110 has been discontinued. LG200-110 is an alternative.

MM-400A
4. Name and Functions of Each Section
4-1
4. Name and Functions of Each Section
(1) Front
[RESET] button:
Resets an error that has occurred.
[POWER] lamp:
Lit when the power is ON.
[TRIGGER] lamp:
Lit during the measurement operation.
Printer:
Prints measured values, waveforms and other information.
(Note) Be sure to turn OFF the power when replacing paper in the printer.
Touch panel:
Shows measured values, waveforms and operation screens. Refer to Chapter
8, “Operation Screens” for details of the operation screens.
USB memory connector:
Plug the USB memory into this connector.







MM-400A
4. Name and Functions of Each Section
4-2
(2) Rear
External I/O connector (1):
A connector to input signals from peripheral devices.
External I/O connector (2):
A connector to output signals to peripheral devices.
RS-232C/RS-485 connector:
Plug the instrument and host computer with an optional RS-232C
communication cable. Used to transfer measured values and waveform data to
the host computer.
Toroidal coil connector:
Plug a toroidal coil into this connector.
Voltage detection cable connector:
Plug the voltage detection cable into this connector.
Displacement sensor connector 1*1:
Plug a discontinued displacement (LGK-110/LGF-125L-B/LGF-550L-B)
into this connector.
Displacement sensor connector 2*1:
Plug an optional displacement sensor*2 into this connector.
Force sensor connector*1:
Plug an optional force sensor (MA-520B/521B/522B) into this connector.
Multiconnector*1:
Plug an optional current/force sensor (MA-770A/771A) into this connector.
Also used to plug an external voltage/current input and shunt resistor.










⑪
⑫

MM-400A
4. Name and Functions of Each Section
4-3
Main power switch:
Switch for the main power. Set this to the ON position (– side) to start the
MM-400A.
○
11 Power cable connector:
Plug the power cable into this connector.
○
12 LAN cable connector:
Plug the LAN cable for Ethernet into this connector. The orange LED is lit
when it can be connected and is blinked when the data is being sent or
received. The green LED is not lit when operated at 10 MB/s and is lit when
operated at 100 MB/s.
*1: to are force/displacement-equipped specification function connectors.
*2: In addition to the displacement sensor, the dedicated connector and cable are
required. Refer to “(2) b in Chapter 3” for details.

MM-400A
5. Operation Flow
5-1
5. Operation Flow
The operation flow is shown below.
Device connection
......: Option
(Refer to (1) in Chapter 6)
Install the MM-400A
Startup the MM-400A
(Refer to (1) in Chapter 7)
Print measurement results
(Refer to (2) in Chapter 8)
Shut down the MM-400A
Using recorded data
Perform measurement
Current (current
flow time)
measurement
(Refer to (1) in
Chapter 9)
Voltage
measurement
(Refer to (1) in
Chapter 9)
Displacement
measurement *1
(Refer to (2) in
Chapter 9)
Force
measurement *1
(Refer to (3) in
Chapter 9)
(Refer to (3) in Chapter 7)
(Refer to Chapter 12)
Connect measurement devices to the MM-400A
Displacement
sensor
(Refer to (2) b,
Chapter 6)
Displacement
measurement *1
Toroidal coil
Current
measurement
(Refer to (2) a,
Chapter 6)
Voltage
measurement
Voltage
detection
cable
(Refer to (2) a,
Chapter 6)
Force
sensor
or
Force
measurement *1
Current/force
sensor
(Refer to (2) c,
Chapter 6)
(Refer to (2) c,
Chapter 6)
Connect with other
devices
Sequencer
PC
etc.
Setup the system and conditions
(Refer to (2) j, k, l, m, r, s, t, Chapter 8)
*1: Force/displacement-equipped
specification function

MM-400A
6. Installation and Connections
6-1
6. Installation and Connections
(1) Installing the MM-400A
1) Place the MM-400A on a stable surface.
Avoid locations where vibration is generated or the MM-400Arotates or
moves.
2) Connect the power cable to the power cable connector [INPUT POWER] on
the rear panel.
Ground the grounding terminal of the power cable. If not, measurement of the
MM-400A may be affected. Perform class D grounding work (Ministry of
Economy, Trade and Industry "Technical Standards for Electric Equipment").
When using the power cable (3 pin), connect it to the outlet which is the
grounding terminal is grounded (Fig. a). When using the 3-pin/2-pin conversion
adapter, ground the green/yellow-green grounding wire (Fig. b).
a
b