YOKOGAWA 734 01, 734 02 User Manual

User's
Manual

734 01/02

Digital Multimeter

Store this manual in a safe place for future reference.

IM 73401
4th Edition
July. 2001

Thank you for purchasing our Model 734 Digital Multimeter.
This user’s manual describes the specifications and handling precaution for
this Digital Multimeter.
Before using this Digital Multimeter, thoroughly read this manual to get a
clear understanding on proper use.

Always observe the following instructions.
Failure to do so may result in electric shock or other dangers that may lead to
serious injury or the loss of life.
Yokogawa M&C Corporation is in no way liable for any damage resulting
from the user’s mishandling of the product.
For safe use of this product, the following safety symbols are used on the
product:

■ About This Manual

• Every effort has been made to ensure accuracy in the preparation of this
manual.
However, should any errors or omissions come to the attention of the user,
please contact Yokogawa M&C Corporation.

• The contents of this manual are subject to change without prior notice
because of improvement in performance or function.

• All rights reserved. No part of this manual may be reproduced in any from
without Yokogawa M&C Corporation’s written permission.

i

Regarding Safe Use of This Product

WARNING

For safe use of this product, the following safety symbols are used on the
product:

CAUTION

This indicates that the operator must refer to an explanation
in the instruction manual in order to avoid the risk of serious
injury or the loss of life.

This indicates that the operator must refer to an explanation
in the instruction manual in order to avoid the risk of injury
or damage to the product.

Note This indicates information that is essential for handling the

instrument or should be noted in order to familiarize
yourself with the instrument’s operating procedures and/
or functions.

Danger! Handle with Care
This symbol indicates that the operator must refer to an
explanation in the instruction manual in order to avoid risk
of injury or death of personnel or damage to the instrument.

Double Insulation
This symbol indicates double insulation.

Direct Current
This symbol indicates DC voltage/current.

Alternating Current
This symbol indicates AC voltage/current.

DC/AC
This symbol indicates AC and DC.

Fuse
This symbol indicates a fuse.

Ground
This symbol indicates ground (earth).

ii

WARNING

■ Always observe the following instructions. Failure to do so

may result in electric shock or other dangers that may lead to
serious injury or the loss of life.

Testing leads

• Use the probes supplied by Yokogawa M&C with this instrument.

• Do not use testing leads that have deteriorated or are defective.

• Disconnect testing leads from the circuit under test before opening the
casing to replace the batteries or for any other reason.

• Disconnect testing leads from the circuit under test before attaching/
detaching the testing leads to/from the instrument.

• Disconnect testing leads from the instrument before opening the casing to
replace the batteries or for any other reason.

Casing

• Do not use the instrument if there is any damage to the casing or when the
casing is removed.

Fuses

• Use fuses of the specified rating when the fuse is replaced.

Operating Environment

• Do not operate the instrument in an atmosphere where any flammable or
explosive gas is present.

• Avoid using the instrument if it has been exposed to rain or moisture or if
your hands are wet.

Disassembly

• No person, except personnel from Yokogawa M&C, is authorized to
disassemble this instrument.

iii

WARNING

■ To avoid damage to instrument and/or electric shock

The restrictions on the maximum voltage level for which the 734 01 and
734 02 can be used, depend on the over-voltage categories specified by
the safety standards. These category specifications are set to protect
operators against transient impulse voltages and surge voltages in power
line.

Do not apply any input level higher than maximum allowable input.

AC/DC 600V CAT.III
AC/DC 1000V CAT.II

䊉 Over-voltage Category (Safety standards EN61010-1)

CAT.III: Covers the path from an indoor distribution switchboard to a

mains outlet.

CAT. II: Covers a primary-stage circuit of equipment connected to a

mains outlet.

CAT. I : Covers a secondary-stage circuit of power transformer of

equipment.

Note

Radiation immunity affects the accuracy of the 734 01 and 734 02 under
the conditions specified in EN5008-1 and EN61326-1.

Use of this instrument is limited to domestic, commercial, and light
industry applications. If equipment generating strong electromag­netic interference is located nearly, the instrument may malfunction.

iv

Contents

1. Overview ................................................................................................ 1

2. Specifications ......................................................................................... 3

2-1 General Specifications .................................................................. 3

2-2 Measurement Ranges ................................................................... 6

3. Operation .............................................................................................. 14

3-1 Precautions Before Measurement ............................................... 14

3-2 Components ................................................................................ 15

3-3 Measuring Instruction ................................................................ 20

4. Battery and Fuse Replacement ............................................................. 42

4-1 Battery Replacement .................................................................. 42

4-2 Fuse Replacement ...................................................................... 43

5. Calibration and Maintenance................................................................ 44

v

1. Overview

䊉 Fast and more accurate measurement

The 734 01 and 734 02 digital multimeters use Σ modulation for
A/D conversion, which enable fast and more accurate measurement.

䊉 Display

5-digit (LCD)
Maximum Reading: 50000
Bar graph indicator

䊉 Supports a variety of measurement function

DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency,
Temperature, Capacitor,
Duty cycle ratio, Decibel (dB), Averaging when the measured value may
greatly fluctuate,
Relative values from the reference measurement values (REL ),
Minimum value (MIN), Maximum value (MAX), Average value (AVG),
Range Hold (R•H), Data Hold (D•H), Auto Hold (A•H), Peak Hold* (P•H),
Continuity Check, Zero Adjustment (Capacitor, Resistance), Diode Test,
Save to Memory, LCD backlight*,

*: For model 734 02 only

䊉 Communication: Optional communication unit is required

• Enables downloading of measurement data to a personal computer
using optional communication package.
Uploading of data, making trend graph and downloading to EXCEL
are possible according to applications.

• Output of measurement data to the optional printer is possible.

1

䊉 Safety design

Complied standards: CE standards
Uses a current-input terminal shutter for preventing wrong input.
Uses high-performance UL-standard fuses.

2

2. Specifications

2-1 General Specifications

Function: DC Voltage, AC Voltage, DC Current, AC Current,

Resistance, Frequency, Temperature, Capacitor,
Duty cycle ratio, Decibel (dB), Averaging functuon,
Relative values from the reference measurement
values (REL ), Minimum value (MIN), Maximum
value (MAX), Average value (AVG), Range Hold
(R•H), Data Hold (D•H), Auto Hold (A•H), Peak
Hold* (P•H), Continuity Check, Zero Adjustment
(Capacitor, Resistance), Diode Test, Save to
Memory, LCD backlight*,

*: For model 734 02 only

Measuring method: Σ modulation
Display: 5-digit (LCD)

Maximum Reading: 50000
Polarity Indicator: “–” Appears automatically when
the polarity is negative
Overrange Indicator: “ OL ”
Low-battery Indicator: “ ” Appears when the
batteries become low

Measurement cycle: Digital display 3 times per second

When frequency measurement: one times per second
When capacitor measurement (50mF): max. 0.03
time per second
Bar graph display 10 times per second

3

Operating temperature and humidity ranges:

-10 to 50ºC, 80%RH or less (no condensation)
70%RH or less at 40 to 50ºC.

Storage temperature and humidity ranges:

-25 to 60ºC, 70%RH or less (no condensation)

Temperature coefficient:(Accuracy at 23±5ºC× 0.05)/ºC or less

(Temperature ranges: -10 to 18ºC and 28 to 50ºC)
Operating altitude: 2000m max. above sea level
Power supply: AA-size (R6) 1.5V batteries: 2
Battery life: Approximately 120 hours

(Operating hours of alkaline batteries when in DC

voltage-mode.)

Note: The battery life varies depending on the

operating conditions.
Withstand voltage: 5.5kVrms AC for one minute

(across input terminals and casing)
External dimensions: Approximately 85(W)×191(H)×40(D)mm
Weight: Approximately 450g
Complied standards: Safety standards

EN61010-1; 1995, EN61010-2-031; 1995
Overvoltage category III (Max. input voltage:
AC/DC600V)
Overvoltage category II (Max. input voltage:
AC/DC1000V)
Pollution degree 2

EMC standards

EMI (Electro Magnetic Interference)

EN55011; 1998
EN61326-1; 1997+A1;1998
(Class B, Group 1)

4

EMS (Immunity)

EN50082-1; 1997
EN61326-1; 1997+A1;1998

Effect of radiation immunity:

Accuracy range of reading:

[Rated accuracy +12% of maximum reading] for

the strength of a radio-frequency electromagnetic

field of 3V/m
Standard accessories: Instruction manual: 1

Testing leads: 1set

Batteries (included): 2

Fuse (included)

500mA/600V, 15A/600V

Optional accessories:

Communication package with communication cable

Engligh version 920 01-E

Package with RS-232C Cable 920 01-E/P
Temperature probes 7511 02 to 05
Carrying case

For the 734 main unit with testing leads

For the 734 main unit with testing leads

and communication cable 930 14
Fuse

500mA/600V A1518EF

15A/600V A1519EF
Testing leads (1set) RD031
Printer 97010
AC adapter (for printer, Europe) 940 06
AC adapter (for printer, USA) 940 07
Thermal paper for printer (10 rolls) 970 80
RS-232C Cable (for printer) 910 15

B9646HH

5

2-2 Measurement Ranges

Test conditions:
Temperature and humidity: 23±5ºC at 80%RH or less
Accuracy: ±(percentage of reading + number of digits)

Note: Each response time is a value to rated accuracy within
selected range.

DC Voltage Measurement V

Range Resolution

50mV

0.001mV

*

500mV

2400mV

1000V

5V

50V

500V

0.01mV

0.1mV

0.0001V

0.001V

0.01V

0.1V

Accuracy

73401 73402

0.1+10

0.04+2

0.05+10

0.02+2

0.025+5

0.07+2

0.03+2

*: Maximum Reading of 2400mV Range: 24000
NMRR: 80dB or more 50/60Hz –0.1%
CMRR: 120dB or more 50/60Hz (Rs=1k‰)
Response time: 1 sec max.

AC Voltage Measurement V
734 01

AC Coupling, Rms-value detection, Crest factor: <3

Accuracy

Resolution

Range

500mV

5V

50V

500V

1000V

0.01mV

0.0001V

0.001V

0.01V

0.1V

10 to
20Hz

1.5+30
*1

*2

20Hz to

1kHz

*2

1k to

10kHz

0.7+30
*1

3+30

6

*2

Input

Resistance

Approx.

100M‰

10M‰

Impe-

10k to

dance

20kHz

11MΩ
<50pF

2+50

*2

10MΩ
<50pF

---

Maximum

Input Voltage

1000V DC

1000V
rms AC

Maximum

Input

Volt age

1000V
rms AC

1000V

Input

DC

AC Voltage Measurement V
734 02

AC Coupling, Rms-value detection, Crest factor: <3

Range

500mV

5V

50V

500V

1000V

Reso­lution

0.01mV

0.0001V

0.001V

0.01V

0.1V

10 to

20Hz

1+30

*1

*2

20Hz to

1kHz

0.4+30

*2

Accuracy

1k to

10kHz

*1

3+30

*2

10k to

20kHz

1+40

*1

Accuracy
*1: At 5 to 100% of range
*2: At 10 to 100% of range
CMRR: 80dB or more DC to 60Hz (Rs=1kΩ)
Response time: 2 sec max.

DCV+ACV +
734 01

Maximum Reading 5000, Crest factor: <3

Accuracy

Resolution

Range

5V

50V

500V

1000V

0.001V

0.01V

0.1V
1V

DC, 10

to 20Hz

1.5+10

DC, 20Hz

*1

*2

to 1kHz

1+10

*2

DC, 1k

to 10kHz

*1

20k to

50k to

50kHz

100kHz

2+70*25+200

*2

---

DC, 10k

to 20kHz

2+10

*2

---

Input
Impe­dance

11MΩ
<50pF

10MΩ
<50pF

Input
Impe­dance

11MΩ

<50pF

10MΩ

<50pF

Maximum

Maxi-

mum
Input

Voltage

1000V

rms
AC

1000V

DC

Input

Voltage
1000V

rms AC

1000V

DC

7

DCV+ACV +
734 02

Maximum Reading 5000, Crest factor: <3

Range

5V

50V

500V

1000V

Reso­lution

0.001V

0.01V

0.1V
1V

DC,
10 to

20Hz

1.5+10
*1

*2

DC,

20Hz to

1kHz

0.5+10

*2

Accuracy
DC,
1k to

10kHz

*1

DC,

10k to

20kHz

1+10

*1

---

Accuracy
*1: At 5 to 100% of range
*2: At 10 to 100% of range
CMRR: 80dB or more DC to 60Hz (Rs=1kΩ)
Response time: Approx. 5 sec

DC Current Measurement A

Accuracy

73401/02

<0.11mV/µA

0.2+2

0.6+2

Range

500µA

5000µA

50mA

500mA

5A

10A

Resolution Voltage Drop

0.01µA

0.1µA

0.001mA

0.01mA

0.0001A

0.001A

Response time: 1 sec max.

DC,

DC,

20k to

50k to

50kHz

100kHz

2+10*25+20

<4mV/mA

<0.1V/A

Input
Impe­dance

11MΩ
<50pF

*2

10MΩ
<50pF

Maximum

Input Current
500mA
Protected by a
500mA/600V
fuse.
15A
Protected by a
15A/600V fuse.

Maxi-

mum
Input

Voltage

1000V

rms

AC

1000V

DC

8

AC Current Measurement A
734 01

Range

Resolution

500µA

5000µA

50mA

500mA

AC Current Measurement A
734 02

5A

10A

0.001mA

0.0001A

0.01µA

0.1µA

0.01mA

0.001A

Accuracy

10 to 20Hz 20Hz to 1kHz

1.5+20 1+20

Voltage Drop

<4mV/mA

Accuracy

Resolution

Range

500µA

5000µA

50mA

500mA

5A

10A

0.01µA

0.1µA

0.001mA

0.01mA

0.0001A

0.001A

20Hz to

10 to

20Hz

1kHz

1+20

1.5+20 1+20 2+30

0.75
+20

1k to
5kHz

1+30

Model 734 01/02
Accuracy
At 5 to 100% of range
Note: At 10 to 100% of range for 10A Range
Response time: 2 sec max.

<0.11

mV/µA

<0.1V/A

Voltage

Drop

<0.11

mV/µA

<4

mV/mA

<0.1

V/A

Crest factor: <3

Maximum

Input Current
500mA
Protected by a
500mA/600V
fuse.
15A
Protected by a
15A/600V fuse.

Crest factor: <3

Maximum

Input Current

500mA
Protected by a
500mA/600V
fuse.
15A
Protected by a
15A/600V fuse.

9