YOKOGAWA MT210 User manual

IM 767361-01E
4th Edition
Digital Manometer

Product Registration
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YOKOGAWA provides registered users with a variety of information and services.
Please allow us to serve you best by completing the product registration form
accessible from our website.
http://tmi.yokogawa.com/
PIM 103-04E

1
IM 767361-01E
Foreword
Thank you for purchasing the YOKOGAWA MT200 Series* Digital Manometer.
This user’s manual contains useful information about the instrument’s functions
and operating procedures MT210, MT210F, and MT220, as well as precautions
that should be observed during use. To ensure proper use of the instrument,
please read this manual thoroughly before beginning operation.
After reading the manual, keep it in a convenient location for quick reference
whenever a question arises during operation of the instrument.
*MT200 series: MT210 (pressure measurement only)
MT210F (pressure measurement only, includes a
measurement mode switching function)
MT220 (includes DMM and 24 VDC output functions)
Notes
• The contents of this manual are subject to change without prior notice as a
result of improvements in the instrument’s performance and functions.
• Everye󰀨orthasbeenmadeinthepreparationofthismanualtoensurethe
accuracyofitscontents.However,shouldyouhaveanyquestionsorndany
errors, please contact your nearest YOKOGAWA representative as listed on
the back cover of this manual.
• Copying or reproducing any or all parts of the contents of this manual without
the permission of YOKOGAWA is strictly prohibited.
Trademarks
• The PC-9800 Series is a product line of NEC Corporation.
• Adobe and Adobe Acrobat are trademarks of Adobe Systems Incorporated.
• VCO is a registered trademark of SWAGELOK in the United States.
Revisions
January 2001 1st Edition
March 2001 2nd Edition
October 2017 3rd Edition
September 2018 4th Edition
4th Edition : September 2018 (YMI)
All Rights Reserved, Copyright © 2001 Yokogawa Electric Corporation
All Rights Reserved, Copyright © 2018 Yokogawa Test & Measurement Corporation

2IM 767361-01E
Safety Precautions
This product is designed to be used by a person with specialized knowledge.
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. If this instrument is used in a
mannernotspeciedinthismanual,theprotectionprovidedbythisinstrumentmay
be impaired. Also, YOKOGAWA assumes no liability for the customer’s failure to
comply with these requirements.
This manual is part of the product and contains important information. Store
this manual in a safe place close to the instrument so that you can refer to it
immediately. Keep this manual until you dispose of the instrument.
Generaldenitionsofsafetysymbolsusedontheinstrumentandinthemanuals
Handle with Care (To avoid injury, death of personnel, or damage
to the instrument, the user must refer to an explanation in the user’s
manual or service manual.)
Alternating current
Direct current
ON (power) In-position of a bistable push control
OFF (power) Out-position of a bistable push control
French
À manipuler délicatement. Toujours se reporter aux manuels
d’utilisation et d’entretien. Ce symbole a été apposé aux endroits
dangereux de l’instrument pour lesquels des consignes spéciales
d’utilisation ou de manipulation ont été émises.
Courant alternatif
Courant direct
Marche (alimentation) Marche
Arrêt (alimentation) Arrêt
WARNING
• Use the Instrument Only for Its Intended Purpose
This instrument is designed to measure the pressure. Use this instrument
only as a pressure measurement.
• Check the Physical Appearance
Do not use the instrument if there is a problem with its physical appearance.
• Use the Correct Power Supply
Before connecting the power cord, ensure that the source voltage matches
the rated supply voltage of the instrument and that it is within the maximum
rated voltage of the provided power cord.

3
IM 767361-01E
Safety Precautions
• Use the Correct Power Cord and Plug
 Topreventanelectricshockorre,besuretousethepowersupplycord
supplied by YOKOGAWA. The main power plug can only be plugged
into an outlet with a protective grounding terminal. Do not invalidate this
protection by using an extension cord without protective earth grounding.
Additionally, do not use the power cord supplied with this instrument with
another instrument.
• Connect the Protective Grounding Terminal
Make sure to connect the protective earth to prevent electric shock
before turning on the power. The power cord for this instrument is a
three-prong type power cord. Connect the power cord to a properly
grounded three-prong outlet.
• Do Not Impair the Protective Grounding
 Nevercuto󰀨theinternalorexternalprotectiveearthwireordisconnect
the wiring of the protective earth terminal. Doing so may result in electric
shock or damage to the instrument.
• Do Not Use When the Protection Functions Are Defective
Before using this instrument, check that the protection functions, such as
the protective grounding and fuse, are working properly. If you suspect a
defect, do not use the instrument.
• External Connection
Securely connect the protective grounding before connecting to the item
under measurement or control unit.
• Fuse
 Topreventre,besuretouseafusewiththespeciedratings(current,
voltage, and type). Before replacing the fuse, turn both the POWER
switch and the MAIN POWER switch OFF and unplug the power cord.
Donotuseanyfuseotherthanthespeciedone.Alsodonotshort-
circuit the fuse holder.
• Do Not Operate in an Explosive Atmosphere
 Donotoperatetheinstrumentinthepresenceofammablegassesor
vapors. Doing so is extremely dangerous.
• Do Not Remove the Covers or Disassemble or Alter the Instrument
 OnlyqualiedYOKOGAWApersonnelmayremovethecoversand
disassemble or alter the instrument. The inside of the instrument is
dangerous because parts of it have high voltages.
• Measuring High-Pressure Gases
• Use piping and pressure connectors that can withstand the pressure
to be measured.
• Make sure that there are no leaks from the piping, connectors, and
jointsandthatthejointsarenotloose.Iftheuidundermeasurement
leaks or if a joint comes loose, the pressure can endanger the user or
the surrounding instruments. Note that higher the pressure, greater
the danger.
• Donotmeasureammable,explosive,toxic,orcorrosiveuids.
• Limitation of Pressure
Applying a pressure exceeding the prescribed allowable input can
damage the instrument. In addition, the applied pressure may be passed
on to the device that is connected to the output connector, and cause
secondary accidents.

4IM 767361-01E
Safety Precautions
CAUTION
• Do not use the instrument to measure gas or liquids that can corrode the
piping material, high temperature liquids (50°C or higher) or gas-liquid
mixtures. If you are measuring gas, make sure the gas is dry and clean.
Do not measure air with high moisture or high oil content.
• For safety and sanitary reasons, do not use the instrument to measure
liquids for drinking.
• This instrument has been designed to withstand physical shock, but to
maintain high accuracy, handle the instrument with care (protect the
instrument from physical shock).
• Do not use the instrument where the ambient temperature drastically
uctuates.Suchenvironmentcancausemeasurementerrors.
• Do not overcharge the batteries.
• Do not operate the instrument in a place where wind or air blows
noticeably, otherwise the measurement accuracy will decrease.
• This is an overvoltage category CAT II (EN61010-1) instrument.
French
AVERTISSEMENT
• Utiliserl’instrumentauxseulesnspourlesquellesilestprévu
Cet instrument est conçu pour mesurer la pression. Utilisez cet
instrument uniquement pour la mesure de pression.
• Inspecterl’apparencephysique
Ne pas utiliser l’instrument si son intégrité physique semble être
compromise.
• Vérierl’alimentation
 Avantdebrancherlecordond’alimentation,vérierquelatensionsource
correspond à la tension d’alimentation nominale du cet instrument et
qu’elle est compatible avec la tension nominale maximale du cordon
d’alimentation.
• Utiliserlecordond’alimentationetlacheadaptés
Pour éviter les risques de choc électrique ou d’incendie, utilisez le cordon
d’alimentationfourniparYOKOGAWA.Lachedoitêtrebranchéesur
une prise secteur raccordée à la terre. En cas d’utilisation d’une rallonge,
celle-ci doit être impérativement reliée à la terre. Par ailleurs, n’utilisez
pas le cordon d’alimentation fourni pour cet instrument avec un autre
appareil.
• Brancher la prise de terre
Avant de mettre l’instrument sous tension, penser à brancher la prise de
terre pour éviter tout choc électrique. Le cordon d’alimentation livré avec
l’instrument est doté de trois broches. Brancher le cordon d’alimentation
sur une prise de courant à trois plots et mise à la terre.
• Ne pas entraver la mise à la terre de protection
 Nejamaisneutraliserleldeterreinterneouexterne,nidébrancherla
borne de mise à la terre. Cela pourrait entraîner un choc électrique ou
endommager l’instrument.
• Nepasutiliserlorsquelesfonctionsdeprotectionsont
défectueuses
 Avantd’utiliserl’instrument,vérierquelesfonctionsdeprotection,telles
que le raccordement à la terre et le fusible, fonctionnent correctement.
En cas de dysfonctionnement possible, ne pas utiliser l’instrument.

5
IM 767361-01E
Safety Precautions
• Connexion externe
Branchez correctement la mise à la terre protectrice avant de brancher
l’élément à mesurer ou l’unité de commande.
• Fusible
Pour éviter un incendie, veillez à utiliser un fusible avec les valeurs
nominalesspéciées(courant,tensionettype).Avantderemplacer
le fusible, tournez le commutateur POWER et le commutateur MAIN
POWER sur OFF et débranchez le cordon d’alimentation. N’utilisez pas
defusibleautrequeceluispécié.Necourt-circuitezpasnonplusle
porte-fusible.
• Ne pas utiliser dans un environnement explosif
 Cetinstrumentn’estpasantidéagrant.Nepasutiliserl’instrument
enprésencedegazoudevapeursinammables.Celapourraitêtre
extrêmement dangereux.
• Nepasretirerlecapot,nidémonteroumodierl’instrument
 SeullepersonnelYOKOGAWAqualiéesthabilitéàretirerlecapotet
àdémonteroumodierl’instrument.Certainscomposantsàl’intérieur
de l’instrument sont à haute tension et par conséquent, représentent un
danger.
• Mesureduuidehautepression
• Utiliser une tuyauterie et des connecteurs pression pouvant résister à
la pression à mesurer.
• S’assurer de l’absence de fuites au niveau de la tuyauterie, des
connecteursetdesjoints,etvérierquelesjointsnesontpas
desserrés.Encasdefuiteduuidemesuréoudedesserraged’un
joint, la pression risque de mettre en danger l’utilisateur ou les
instruments environnants. Il est à noter que plus la pression est
élevée, plus le danger est important.
• Nepasmesurerdesliquidesinammables,toxiquesoucorrosifs.
Une telle action peut s’avérer dangereuse pour l’utilisateur.
• Limite de pression
Appliquer une pression dépassant l’entrée autorisée préconisée peut
endommager l’instrument. En outre, la pression appliquée peut être
transmise à l’appareil branché au connecteur de sortie, et provoquer des
accidents secondaires.
ATTENTION
• Ne pas utiliser l’instrument pour mesurer des gaz ou des liquides
susceptibles de corroder le matériau de la tuyauterie, des liquides haute
température (50 °C ou plus) ni des mélanges gaz-liquides. En cas de
mesure de gaz, s’assurer que le gaz est propre et sec. Ne pas mesurer
de l’air très humide ni de l’air à haute teneur en huile.
• Pour des raisons sécuritaires et sanitaires, ne pas utiliser l’instrument
pour mesurer des liquides destinés à être ingérés.
• Cet instrument a été conçu de façon à résister à des chocs physiques.
Cependant, pour maintenir son haut niveau de précision, manipuler
l’instrument avec précaution (protéger l’instrument contre les chocs
physiques).
• Nepasutiliserl’instrumentdansunlieuexposéàdefortesuctuations
de la température ambiante. Un tel environnement peut provoquer des
erreurs de mesure.
• Ne surchargez pas les batteries.
• L’utilisation de l’instrument dans un lieu exposé au vent ou aux courants
d’airrisqued’a󰀨ecterlaprécisiondelamesure.
• Il s’agit d’un instrument de catégorie de surtension CAT II (EN61010-1)

6IM 767361-01E
Safety Precautions
Symbols Used in this Manual
Type Symbol Meaning
Note  A󰀩xedtothemainunit,thisindicatesthatto
avoid injury, death, or damage to the instrument,
the operator must refer to the corresponding
explanation in the manual.
WARNING Describes precautions that should be observed to
prevent injury or death to the user.
CAUTION Describes precautions that should be observed to
prevent damage to the instrument.
Note Provides information that is important for proper
operation of the instrument.
Key HOLD Indicates a key on the front panel.
Checking the Contents of the Package
If you have received the wrong instrument or accessories, or if some
accessories are missing or appear abnormal, contact the dealer from which
youpurchasedthem.Tellthedealerthemodelname,su󰀩xcode,and
instrument number given on the name plate on the side panel.
MODEL (Type Name)
ModelCode BasicSpecications
(Series Name)
767351 (MT220) Gauge pressure ( 10 kPa) (includes DMM and 24 VDC output
functions)
767353 (MT220) Gauge pressure ( 130 kPa) (includes DMM and 24 VDC output
functions)
767355 (MT220) Gauge pressure ( 700 kPa)
(includes DMM and 24 VDC output
functions)
767356 (MT220) Gauge pressure ( 3000 kPa) (includes DMM and 24 VDC output
functions)
767357 (MT220) Absolute pressure (130 kPa abs) (includes DMM and 24 VDC output
functions)
767361 (MT210) Gauge pressure ( 10 kPa)
767363 (MT210) Gauge pressure ( 130 kPa)
767365 (MT210) Gauge pressure ( 700 kPa)
767366 (MT210) Gauge pressure ( 3000 kPa)
767367 (MT210) Absolute pressure (130 kPa abs)
767370(MT210) Di󰀨erentialpressure ( 1kPa)
767371(MT210) Di󰀨erentialpressure ( 10kPa)
767372(MT210) Di󰀨erentialpressure ( 130kPa)
767373(MT210) Di󰀨erentialpressure ( 700kPa)
767381 (MT210F) Gauge pressure ( 10 kPa) includes measurement mode switching
function
767383 (MT210F) Gauge pressure ( 130 kPa) includes measurement mode switching
function
767385 (MT210F) Gauge pressure ( 700 kPa) includes measurement mode switching
function
767386 (MT210F) Gauge pressure ( 3000 kPa) includes measurement mode switching
function
767387 (MT210F) Absolute pressure ( 130 kPa abs) includes measurement mode switching
function

7
IM 767361-01E
Safety Precautions
SUFFIX (Su󰀩xCode)
Name Su󰀩xCode Description
Units of pressure -U1 kPa only
-U2 kPa, switchable to kgf/cm2, mmH2O, and mmHg
-U3 kPa, switchable to kgf/cm2, mmH2O, mmHg, inH2O, inHg, and psi
Communication -C1 GP-IB Interface
interface -C2 RS-232 Interface
Input connection -P1 Rc 1/4
-P2 1/4 NPT female-threaded
-P3 VCO 1/4*1
Power cord*2 -D UL Standard
-F VDE Standard
-R AS Standard
-Q BS Standard
-H GB Standard
Options /DA D/A output, comparator output, and external trigger input
*1: VCO is a registerd trademark of SWAGELOK Company.
*2: The power cord must be changed if a 200-V power line is used. Consult the manufacture.
Standard Accessories
The following standard accessories are supplied with the instrument. Make sure
that all items are present and undamaged.
Power fuse (2 pieces)
(a spare, attached to
the fuse holder)
A1113EF
Current fuse (2 pieces)
(a spare, attached to
the fuse holder)
A1341EF (MT220 only)
Rubber feet
(2 pieces)
A9088ZM
UL/CSA standard
A1006WD
VDE standard
A1009WD
BS standard
A1054WD
AS standard
A1024WD
DFR
Q
Power cord (one of the following power cords
is supplied according to the instrument’s suffix codes)
Connector for
external DC power
A1036JC
Seal for measuring
object
B9320NB
H
GB standard
A1064WD
Measurement lead
(MT220 only)
B9280TZ
VCO body
1 piece (for -P3), 2 pieces
(for the 76737 -P3)
B9320GU
Remote connector for the
output terminal (When the
/DA option is installed)
A1003JD
User’s Manual
(this manual) (1)
Standard accessories are not covered by warranty of this instrument.

8IM 767361-01E
Safety Precautions
Optional Accessories
The following optional accessories are also available. Upon receipt of any
optional accessories, make sure that no items are missing or damaged.
Part Name Model/Part No. Minimum Purchase Quantity
Battery pack
Seal, screws (M5 × 40 mm × 4) 269913 1
Ni-Cd batteries 269914 1 (3 Ni-Cd batteries as a set)
Carrying case B9320ND 1
ConnectorassemblyforRc(forφ4×φ6vinyltube) B9984BY 1
(For I/O connection section code -P1)
ConnectorassemblyforRc(forφ4×φ6vinyltube) B9984BW 1
(For I/O connection section code -P2)
Conversion connector (JIS, R1/4-Rc1/8) G9612BG 1
Conversion connector (ANSI, R1/4-1/4NPT female) G9612BJ 1
Conversion connector G9612BW 1
(ANSI, R1/4-1/8NPT female)
Connector assembly for Rc
for the Φ4×Φ6 vinyl tube
For I/O connection section code -P1:B9984BY
For I/O connection section code -P2:B9984BW
Simple connector assebly
B9310ZH
Conversion connector
(JIS) G9612BG
Conversion connector
(ANSI) G9612BJ
Conversion connector
(ANSI) G9612BW
Optional accesories(sold separately) are not covered by warranty of this
instrument.
If you have any questions regarding optional accessories, or if you wish to place
an order, contact the dealer from whom you purchased the instrument.

9
IM 767361-01E
Safety Precautions
Compliance with the Radio Waves Act (Republic of Korea)
This product complies with the Radio Waves Act Act (Republic of Korea).
Note the following when using the product in Republic of Korea.
이 기기는 업무용 (A 급 ) 전자파적합기기로서 판매자 또는 사용자는 이 점을
주의하시기 바라며 , 가정외의 지역에서 사용하는 것을 목적으 로 합니다 .
(The product is for business use (Class A) and meets the electromagnetic
compatibility requirements. The seller and the user must note the above point
and use the product in a place except for home.)
Registration No: KCC-REM-IMY-ERA010
Equipment Name: DIGITAL MANOMETER
Trade Name: Yokogawa Test & Measurement Corporation
Manufacturer: Yokogawa Test & Measurement Corporation
Emission This is a Class A product.
Operation of this product in a residential area may cause radio interference in which case the user is
required to correct the interference.
Test conditions CHARGE START: ON, 24V DC: ON, LIGHT: ON, AC mode/DC mode(BATTERY PACK)
All other settings at factory default.
Cable conditions • AC POWER Connector Connect the power cord A1009WD.
• DC POWER SUPPLY connector Connect the DC power supply cable (length: 2.8 m).
• OUTPUT connector Connect the DA output cable (length: 3.0 m) .
• DA OUTPUT connecto Connect the banana-alligator cable(366961, length: 2.5 m).
• GP-IB (IEEE488) connector Connect the GP-IB cables (IEEE488, length: 3.0 m).
• INPUT A/COM (MT220) Connect the measurement lead (758933*1, length: 1.0 m).
• 24 V OUTPUT Connect the banana-alligator cable(366961*2, length: 1.3 m).
• INPUT Unconnect.
Immunity
 Immunityinuence Withintherangespeciedbymeasuredvalue±15%ofrange
EN61326-1 Table 2 (for industrial environment)
Test conditions CHARGE START: ON, 24V DC: ON, LIGHT: ON, AC mode/DC mode(BATTERY PACK)
All other settings at factory default.
*1 The point of banana-alligator cable 366961 is shorted.
*2Bringregistanceof800Ω(470Ω,330Ω)inthepointofthecable

10 IM 767361-01E
Contents
Foreword..........................................................................................................................1
Safety Precautions
Symbols Used in this Manual...........................................................................................6
Checking the Contents of the Package............................................................................6
Compliance with the Radio Waves Act (Republic of Korea) ............................................9
Name and Functions of Each Part
System Block Diagram...................................................................................................12
Functions .......................................................................................................................14
Front Panel ....................................................................................................................16
Rear Panel.....................................................................................................................18
Side View .......................................................................................................................19
Before Starting Measurement
Precautions During Use.................................................................................................20
Operating Conditions .....................................................................................................21
Supplying AC Power ......................................................................................................22
Supplying DC Power......................................................................................................23
Turning the Power Switch ON/OFF................................................................................24
Opening Messages........................................................................................................26
Default Settings (On Shipment from the Factory)..........................................................27
Initializing Settings .........................................................................................................27
Pressure Measurement
Zero Calibration .............................................................................................................28
Input Function ................................................................................................................29
Selecting the Units.........................................................................................................32
Selecting the Number of Display Digits..........................................................................32
Relative Display .............................................................................................................32
Turning the Back Lighting ON/OFF................................................................................33
Turning the ata Hold Function ON/OFF .........................................................................33
Trigger............................................................................................................................33
D/A Output (/DA Option).................................................................................................34
Comparator Function (/DA Option) ................................................................................36
Setting the Beep Sound.................................................................................................36
Keylock Function............................................................................................................36
Setting the Measurement Mode.....................................................................................37
Output Connector (/DA Option)......................................................................................38
AdjustingandCalibratingtheDi󰀨erentialPressureTransmitterusingtheMT220
ConnectingtheDi󰀨erentialPressureTransmittertotheMT220 ....................................39
24 VDC Ouput................................................................................................................40
DMM Function................................................................................................................41
%Display .......................................................................................................................41
Error Display ..................................................................................................................42
Storing and Recalling Data (MT220 Only)
Storing Data...................................................................................................................43
Manual Store..................................................................................................................44
Data Recall ....................................................................................................................44
Deleting Data .................................................................................................................45
Displaying the Number of Data Items Which Can Be Stored.........................................45
Battery Pack (Optional)
Connecting the Battery Pack to the Main Unit ...............................................................46
Charging the Ni-Cd Batteries.........................................................................................47
Replacing the Ni-Cd Batteries........................................................................................49
Overview of the GP-IB Interface
GP-IB Interface Function ...............................................................................................51
GP-IBInterfaceSpecications .......................................................................................51

11
IM 767361-01E
Contents
Turning GP-IB ON/OFF..................................................................................................51
Interface Messages Supported by the Instrument .........................................................52
Switching between Remote and Local Mode.................................................................52
Setting the Mode and Address.......................................................................................52
Setting the GP-IB Interface............................................................................................53
Overview of the RS-232 Interface
RS-232 Interface Functions ...........................................................................................54
RS-232InterfaceSpecications.....................................................................................54
Connecting the RS-232 Interface Cable ........................................................................54
Connector and Signal Names........................................................................................55
Signal Direction..............................................................................................................55
Table of RS-232 Standard Signals and Their JIS and CCITT Abbreviations .................56
Handshaking..................................................................................................................56
Description of Each Handshaking Method.....................................................................57
Precautions Regarding Data Receiving Control ............................................................58
Setting the Data Format.................................................................................................58
RS-232 Communications Settings.................................................................................59
Selecting Normal or Talk-Only Mode .............................................................................59
Setting the Handshaking Mode, Data Format, and Baud Rate......................................60
RS-232SpecicCommands..........................................................................................60
Before Programming
Basic Programming Format ...........................................................................................61
Precautions when Programming....................................................................................61
How to Use the Appendix...............................................................................................61
Troubleshooting, Maintenance, and Inspection
Items to be Checked in Case of an Abnormality............................................................62
Error Codes and Corrective Actions...............................................................................62
Self-Test Error When the Power is Turned ON. .............................................................63
Calibrating the Pressure Measurement Function...........................................................64
Calibrating the DMM Function (MT220 Only) ................................................................64
Recommended Replacement Parts...............................................................................66
Replacing the Fuse........................................................................................................66
Fuse Position and Replacement Method.......................................................................67
Specications
Pressure Measurement Section (767351/767361/767381/767353/767363/767383/
767355/767365/767385)................................................................................................68
Pressure Measurement Section (767356/767366/767386/767357/767367/767387) ....69
Pressure Measurement Section (767370/767371) ........................................................70
Pressure Measurement Section (767372/767373) ........................................................70
Pressure Measurement Section (Common to All Models) .............................................71
DCV and DCA Measurement Section, MT220 Only ......................................................71
24 V Supply Section, MT220 Only.................................................................................71
Data memory function, MT220 Only ..............................................................................71
Communication Function (install either one)..................................................................72
Option /DA.....................................................................................................................72
CommonSpecications .................................................................................................73
External Dimensions......................................................................................................74
Appendix
Command List.......................................................................................................... App-1
Communications Command List.............................................................................. App-2
Status Byte Format ................................................................................................ App-12
Data Output Format ............................................................................................... App-13
Header Section ...................................................................................................... App-13
Output Format for Recalled Data (Response to the “ORD” Command, MT220 Only).......
App-15
Output Format of Setup Information (Response to the “OS” Command)............... App-15
Sample Program.................................................................................................... App-16
Index

12 IM 767361-01E
Name and Functions of Each Part
System Block Diagram
Theuidpressuretobemeasuredissenttotheresonantsensorsection.
The resonant sensor section consists of a resonant sensor (developed by
YOKOGAWA)andanexcitationcircuittoconverttheuidpressuretoa
frequency signal. The frequency signal is then sampled in the pressure sensor
section at the rate corresponding to the current measurement mode and
converted into a pressure value. As necessary, the converted pressure value
undergoes processing such as averaging, and is then sent to the main CPU and
displayed.
The /DA option section is made up of a D/A output section with comparator
output as well as an I/O section that controls the external trigger input. The D/
A output section outputs the D/A signal corresponding to the pressure value
received from the pressure calculation section at 2 ms period. The comparator
output section outputs the results obtained by comparing the upper and lower
limits of pressure to the measured pressure (synchronized to D/A output). When
put on HOLD, measurement is performed one time when a falling signal is input
to the external input trigger.
There are three measurement modes (normal, medium-speed, high-speeed)
on the MF210F. In addition, dynamic mode is availalble when the /DA option is
installed. This mode provides high precision pressure measurements and high-
speed D/A output at the same time.
The MT220 has a DMM function and a 24 VDC output function.
The DMM is controlled by the main CPU. The input current and voltage signals
are converted to digital signals by the A/D converter and sent to the main
CPU. In the main CPU they are converted to current and voltage values, then
averaging is performed (in the same manner as occurs with pressure values)
and the results are displayed. 24 VDC output is turned ON and OFF by the
main CPU. The instrument has an excess current detection function, and
detection signals are sent to the main CPU.
DMM section
Pressure Measurement Section
Pressure
calculation
section
Main CPU
Display and operating keys
Power supply
Communications interface
(GP-IB or RS-232)
D/A output section
/DA Option
D/A output
Comparator output
External trigger input
100 to 120 VAC
200 to 240 VAC
12 VDC
Battery backup
I/O input output
section
Silicon
resonant sensor
section
V
COM
A
Input
section
24 VDC output section
24V
COM
MT220 Only
A/D
converter
Control
section
Output
section
Control
section

Name and Functions of Each Part
13
IM 767361-01E
Power Supply and Power Switch
Thisinstrumentcanbeoperatedfromthreedi󰀨erentkindsofpowersupply,
commercial power, DC power (10 to 15 VDC), and battery pack (optional).
To operate the instrument using commercial power, turn ON both the MAIN
POEWR switch (rear panel) and POWER switch (front panel). In most cases,
you should always leave the MAIN POWER switch ON, and turn the power ON
or OFF using the POWER switch only.
To operate the instrument using DC power, turn the power ON or OFF using the
POWER switch only. It does not matter whether the MAIN POWER switch is
ON or OFF.
When operating the instrument using the battery pack, turn the power ON or
OFF using the POWER switch only.
If commercial power is supplied to the instrument and the MAIN POWER switch
is ON, the batteries will be trickle-charged. In trickle-charging, the batteries are
charged until natural discharge has been compensated for. Thus, to charge
the batteries completely, follow the operations on page 39, “Charging the Ni-Cd
Batteries.”
Switching
power
supply
Battery
pack
Fuse
Battery charge/
discharge
control circuit
MAIN POWER switch
100 to 120 VAC
200 to 240 VAC
12 VCD
Power Supply
DC/DC
Converter
POWER switch
Name and Functions of Each Part

14 IM 767361-01E
Functions
Functions Common to the MT210, MT210F, and MT220
• PressureMeasurement(GasandLiquid)
Measured values are displayed in 5-1/2 digits. They can also be displayed in
4-1/2 digits (the lowest digit is masked).
However, with the 700 kPa model (767355, 767365, 767373, and 767385),
measured values are displayed only in 4-1/2 digits (or 3-1/2 digits when the
lowest digit is masked).
• Zero Calibration
In order to maintain measurement accuracy, corrections are made to
compensateforthee󰀨ectscausedbychangesintemperatureandinstallation
environment.
• Communications Function (GP-IB or RS-232)
Remote control and acquisition of measured data can be performed via the
speciedcommunicationsinterface(GP-IBorRS-232).
• Data Hold
Stops acquisition of data and puts the displayed data on hold.
• Relative Display
Pressure is displayed as relative values.
• Averaging Function
 TurnsON/OFFaveragingforpressuredata.Responsetimesdi󰀨erasshown
below depending on whether averaging is ON or OFF.
Averaging ON: 2.5 s or less (5 s or less for the 767370).
Averaging OFF: 1 s or less.
• Three Types of Power Supply
The instrument can be operated by commercial power (100 to 120 VAC, 200
to 240 VAC), DC power (10 to 15 VDC), or external battery pack (optional).
• Key Lock
Locks the ZERO CAL key, or all keys except the MENU and LIGHT keys.
Name and Functions of Each Part

Name and Functions of Each Part
15
IM 767361-01E
MT210F Only
• Three Measurement Modes
With the three measurement modes (normal, medium-speed, and high-
speed), you can perform highly precise pressure measurements with rapid
response.
• Dynamic Mode (/DA option Only)
When dynamic mode is ON, you can achieve D/A output with fast response
regardless of the measurement mode. This allows high-speed D/A output
while displaying the data in highly precise normal measurement mode.
MT220 Only
• DMM Function (DCV, DCA Measurement)
Measurement of voltage (1 to 5 V) and current (4 to 20 mA) is possible, and
measured values are displayed in 4-1/2 digits.
A fuse is provided in each current terminal to protect against excessive
current.
• 24 VDC Power Supply
Floating output. The maximum output is 24 V/30 mA.
• Input % Display
 Pressure: Displayedasapercentagerelativetothespeciedfullscale
setting.
 Current/Voltage:Displayedasapercentagewith1to5Vor4to20mAas0%
to100%.
• Error Display (%ERROR)
 Thedi󰀨erencebetweenthemeasuredcurrentorvoltage(%)andtheinput
pressure(%)isdisplayedasapercentage(%).
• Data Storage
Up to 2000 data can be stored in the internal memory.
/DA Option
• D/A output
 D/Aoutputallowsyoutooutputmeasuredpressuredataat±2Vor±5V.
• Comparator Output
Compares measured pressure data (D/A output value) to a reference value
and outputs the results as a TTL level.
Name and Functions of Each Part

16 IM 767361-01E
Front Panel
ThefrontpanelsoftheMT210,MT210F,andMT220areshowninthegures
below. The MT210 and MT210F have the same key layouts. MT210F (not
MT210) is displayed in the upper left of the MT210F.
14 12
5
4
1
13
3
5
4
1
1818 3
9 9
MT210 Differential Pressure Model
HL
DIGITAL MANOMETER
PRESSURE
ZERO CAL RELATIVE UNIT HOLD
TRIG
POWER
DISPLAY
LIGHT
COMP
DIGITS
HI IN LO
ENTER/
LOCAL
MENU
PARAMETER SET
INPUT
RANGE:10kPa
STATIC PRESSURE
500kPa MAX
MT210/MT210F Absolute Pressure/Gauge
Pressure Model
DIGITAL MANOMETER
PRESSURE
ZERO CAL RELATIVE UNIT HOLD
TRIG
POWER
DISPLAY
LIGHT
COMP
DIGITS
HI IN LO
ENTER/
LOCAL
MENU
PARAMETER SET
INPUT
RANGE:10kPa
500kPa MAX
8
7
8
7
DIGITAL MANOMETER
PRESSURE
ZERO CAL RELATIVE UNIT
DC5V/20mA ON/OFF ON/OFF
ALL TERMINALS 42V PEAK MAX
BETWEEN TERMINALS AND GND.
FUSE
250V
T 100mA
24V
OUTPUT
24mA 6V
MAX MAX
30mA
MAX
HOLD
TRIG
INPUT ACOM
COM
V
POWER
DISPLAY
DMM 24V DC
LIGHT
COMP
MEMORY
DIGITS
STORE RECALL DELETE
No.
HI IN LO
ENTER/
LOCAL
MENU
PARAMETER SET
INPUT
RANGE:10kPa
500kPa MAX
MT220 Absolute Pressure/Gauge Pressure
% Error
AUTO 0%
AUTO 100%
1 2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
Front Panel
1. LIGHT key
Turns the back lighting ON and OFF.
2. %displaysettingkeys
%ERROR Switchesbetween%displayand%ERRORdisplay.
Auto 0% Setsthevaluecorrespondingto0%pressureautomatically.
Auto 100% Setsthevaluecorrespondingto100%pressureautomatically.
3. DIGITS key
Switches the number of display digits between 5-1/2 and 4-1/2 digits.
(Or between 4-1/2 and 3-1/2 digits for the models 767355, 767365, 767373, and
767385.)
4. MENU key
Controls various kinds of setting actions. Pressing this key when a setting screen
is displayed returns to the normal measurement screen.
Name and Functions of Each Part

Name and Functions of Each Part
17
IM 767361-01E
5. PARAMETER SET keys
Selects parameters to be set, and increments the active (blinking) digit.
Selects parameters to be set, and decrements the active (blinking) digit.
Changes the active digit.
ENTER/ Enters the selected values.
LOCAL Clears remote mode.
6. MEMORY keys
STORE Stores data in the internal memory.
RECALL Recalls data from the internal memory.
DELETE Deletes data from the internal memory.
No. Designates the memory number to which data is to be stored or from
which it is to be recalled.
7. ZERO CAL (Zero Calibration) key
Performs zero pressure calibration.
8. POWER switch
Turns the power ON and OFF during daily operation.
9. DISPLAY keys
RELATIVE Displays pressure as a relative value.
UNIT Switches the unit of measured pressure.
HOLD Stops acquisition of data and puts the displayed data on hold.
TRIG The trigger is activated once while the data is on hold.
10. DMM keys
DC5 V/20 mA Selects whether voltage or current is to be measured.
ON/OFF Selects whether the DMM function is to be used or not.
11. 24 V output key
Turns 24 V output ON and OFF.
12. Pressure input port
A pressure input port is also provided on the rear panel, but it is not possible to
use both ports at the same time.
13. Pressure input port (Low)
A pressure input port is also provided on the rear panel, but it is not possible to
use both ports at the same time.
14. Pressure input port (High)
A pressure input port is also provided on the rear panel, but it is not possible to
use both ports at the same time.
15. Voltage input terminal
For measuring voltage using the DMM function.
16. Current input terminal
For measuring current using the DMM function.
17. 24 VDC output connector
Supplies 24 VDC.
18. Comparator monitor LED (/DA option only)
Displays the results from the comparator function.
Displays the result of the comparator function.
Name and Functions of Each Part

18 IM 767361-01E
Rear Panel
TherearpanelsoftheMT210,MT210F,andMT220areshowninthegures
below.TheMT210F/MT220di󰀨erentialpressuremodelisnotshown.
ON OFF
INPUT
MAIN POWER
RANGE:10kPa
500kPa MAX
WARNING DC POWER
SUPPLY
10-15V DC
10VA MAX
FUSE
(IEEE488)
GPIB
250V T 3.15A
100-120/200-240V AC
45/65VA MAX 50/60Hz
Do not operate without
reading safety precaution in
user s manual.
OUTPUT
D/A
OUTPUT
6.25V
MAX
2 4 5 7
1
63
Absolute Pressure and Gauge Pressure Models (MT210/MT210F/MT220)
8
1
LH
(IEEE488)
GPIB
ON OFF
INPUT
MAIN POWER
RANGE:10kPa
500kPa MAX
WARNING DC POWER
SUPPLY
10-15V DC
10VA MAX
FUSE
250V T 3.15A
100-120/200-240V AC
45/65VA MAX 50/60Hz
Do not operate without
reading safety precaution in
user s manual.
6.25V
OUTPUT
D/A
OUTPUT
MAX
Differential Pressure Model (MT210)
10
9
Name and Functions of Each Part