Hioki 3154 Instruction Manual

Hioki 3154 Manual

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DIGITAL MΩ HiTESTER

INSTRUCTION MANUAL

3154

Contents

Introduction i

Inspection ii

Safety Notes iii

Notes on Use vii

Chapter 1 Outline 1

1.1 Product Introduction 1

1.2 Features

1

1.3 Controls and Functions

3

1.3.1 Displays 3

1.3.2 Front Panel

4

1.3.3 Rear Panel

5

Chapter 2 Preparation for Testing 7

2.1 Connecting Power Cord 8

2.2 Powering On and Off the Unit

9

2.3 Connecting Cord and Probes
(9257, 9289, 9294)

10

2.4 Using Handle

11

2.5 Connecting to Equipment to be tested

12

Chapter 3Setting Basic Testing Conditions 13

3.1 Setting Test voltage 14

3.2 Setting and Verifying Comparator

15

3.2.1 Setting Lower Limit Value 15

3.2.2 Setting and Verifying Test mode

17

3.3 Setting and Verifying Resistance Range 18

3.4 Setting and Verifying Timer

19

3.4.1 Setting and Verifying Test Duration 19

3.4.2 Setting and Verifying Delay Time

21

3.4.3 Determining Delay Time

23

3.5 Setting Sampling Rate 25

3.6 Example Test Condition Setting

26

Chapter 4 Testing 29

4.1 Test Flow 30

4.2 Start Testing

31

4.3 During Testing (TEST status)

32

4.4 Measurement Value Display

33

4.5 Completing Testing

34

4.6 Automatic Discharge

35

4.7 Testing with 9299 SWITCHED PROBE

36

4.7.1 Connecting 9299 SWITCHED PROBE 37

4.7.2 Setting 9299 SWITCHED PROBE

38

Chapter 5 Other Functions 39

5.1 Setting and Verifying Beep Sound 40

5.1.1 Setting Judgment Beep Sound 40

5.1.2 Setting Beep Sound During Key Press

41

5.2 Saving and Loading Test Conditions 42

5.2.1 Saving Test Conditions 42

5.2.2 Loading Test Conditions

44

5.3 Key Lock Function 45

5.4 System Reset

46

Chapter 6 External Interface 47

6.1 Controlling 3154 with External I/O 47

6.1.1 Terminal Connector Board/Signal Wires 48

6.1.2 Electric Specifications

50

6.1.3 Connecting External I/O Terminal

52

6.1.4 External I/O Terminal Circuit

54

6.1.5 Settings to be selected with VOLT 0 to 2
signals

55

6.1.6 Setting TEST Signal OFF Timing

57

6.1.7 Timing Chart

59

6.1.8 Output Signal Connection Example

61

6.1.9 Input Signal Connection Example

62

6.2 Analog Outputting 63

6.2.1 Connecting the 9094 OUTPUT CORD 63

6.2.2 Analog Output

64

6.2.3 Setting Analog Output

65

6.3 Outputting to Printer 66

6.3.1 Connecting Printer 70

6.3.2 Printing Example

71

Chapter 7 RS-232C Interface 73

7.1 Controlling from Personal Computer 74

7.1.1 Preparing for Data Transfer 75

7.1.2 Communication

77

7.1.3 Command Format

78

7.1.4 Numeric Format Chart

82

7.1.5 Command Reference

83

7.2 Sending Measurement Data to PC 97

Chapter 8 Specifications 101

8.1 General Specifications 101

8.2 Measurement Part Specifications

103

8.3 Dimensions

109

8.4 Options and specifications

110

Chapter 9 Maintenance and Service 113

9.1 Maintenance and Inspection 113

9.2 Trouble shooting

114

i

_____________________________________________________________________

Introduction

______________________________________________________________

Introduction

Thank you for purchasing the HIOKI "3154 DIGITAL MΩ
HiTESTER." To obtain maximum performance from the
product, please read this manual first, and keep it handy for
future reference.

Changes to Specifications

Changes are made to software version 1.10.
Software version appears following the model name (3154)
after start up.

・Measurement range is expanded up to 4000 MΩ with

test voltage at 500 V.

・Analog output voltage is changed from 4 V to 2 V when

2000 MΩ is displayed with test voltage at 500 V.

・Outputs 4 V output with analog output at each resistance

range maximum value.

・Wider key entry selections to set lower limit values.
・Saved test conditions can be loaded using external I/O

VOLT 0 to 2 signals.

・External I/O TEST signal OFF timing setting display

appears as "tEStSIGnAL".

・The following four RS-232C commands are added;

:VOLTage:SIGNaL
:VOLTage:SIGNaL?
:AOUT:RANGe
:AOUT:RANGe?

ii

_____________________________________________________________________

Inspection

______________________________________________________________

NOTE

TEST PROBES are not included. Please purchase separately
according to your needs.

Inspection

When you receive the product, inspect it carefully to ensure
that no damage occurred during shipping. In particular,
check the accessories, panel switches, and connectors. If
damage is evident, or if it fails to operate according to the
specifications, contact your dealer or Hioki representative.

Accessories

Verify that following standard accessories are complete.
Instruction Manual

1

Grounded three-core power cord

1

Shipment of the unit

Use the original packing materials when reshipping the
product, if possible.

Warranty

HIOKI cannot be responsible for losses caused either
directly or indirectly by the use of the 3154 with other
equipment, or if ownership is transferred to a third party.

iii

_____________________________________________________________________

Safety Notes

______________________________________________________________

WARNING

This product is designed to conform to IEC 61010
Safety Standards, and has been thoroughly tested for
safety prior to shipment. However, mishandling during
use could result in injury or death, as well as damage
to the product. Be certain that you understand the
instructions and precautions in the manual before use.
We disclaim any responsibility for accidents or injuries
not resulting directly from product defects.

Safety Symbols

The symbol printed on the product indicates that the
user should refer to a corresponding topic in the
manual (marked with the

symbol) before using the
relevant function.
In the manual, the symbol indicates particularly
important information that the user should read before
using the product.

Indicates the ON side of the power switch.

Indicates the OFF side of the power switch.

Indicates that dangerous voltage may be present at
this terminal.

Indicates AC (Alternating Current).

Indicates DC (Direct Current).

SafetyNotes

This manual contains information and warnings essential
for safe operation of the product and for maintaining it in
safe operating condition. Before using the product, be sure
to carefully read the following safety notes.

iv

_____________________________________________________________________

Safety Notes

______________________________________________________________

DANGER

Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to
the user.

W

ARNING

Indicates that incorrect operation presents a
significant hazard that could result in serious injury or
death to the user.

CAUTION

Indicates that incorrect operation presents a
possibility of injury to the user or damage to the
product.

NOTE

Advisory items related to performance or correct
operation of the product.

The following symbols in this manual indicate the relative
importance of cautions and warnings.

v

_____________________________________________________________________

Safety Notes

______________________________________________________________

CAT I

Secondary electrical circuits connected to an AC
electrical outlet through a transformer or similar
device.

CAT II

Primary electrical circuits in equipment connected
to an AC electrical outlet by a power cord (portable
tools, household appliances, etc.)

CAT III

Primary electrical circuits of heavy equipment
(fixed installations) connected directly to the
distribution panel, and feeders from the distribution
panel to outlets.

CAT IV

The circuit from the service drop to the service
entrance, and to the power meter and primary
overcurrent protection device (distribution panel).

Measurement categories (Overvoltage categories)

This product complies with CAT I safety requirements.
To ensure safe operation of measurement product, IEC
61010 establishes safety standards for various electrical
environments, categorized as CAT I to CAT IV, and called
measurement categories. These are defined as follows.

Higher-numbered categories correspond to electrical
environments with greater momentary energy. So a
measurement device designed for CAT III environments can
endure greater momentary energy than a device designed for
CAT II. Using a measurement product in an environment
designated with a higher-numbered category than that for
which the product is rated could result in a severe accident,
and must be carefully avoided.
Never use a CAT I measuring product in CAT II, III, or IV
environments. The measurement categories comply with the
Overvoltage Categories of the IEC60664 Standards.

vi

_____________________________________________________________________

Safety Notes

______________________________________________________________

f.s.

(maximum display value or scale length)
The maximum displayable value or the full length of the
scale.
This is usually the maximum value of the currently
selected range.

rdg.

(reading or displayed value)
The value currently being measured and indicated on the
measuring product.

dgt.

(resolution)
The smallest displayable unit on a digital measuring
product, i.e., the input value that causes the digital
display to show a "1".

Accuracy

We define measurement tolerances in terms of f.s. (full
scale), rdg. (reading) and dgt. (digit) values, with the
following meanings:

vii

_____________________________________________________________________

Notes on Use

______________________________________________________________

DANGE

R

To avoid electric shock, do not remove the product's
case. The internal components of the product carry
high voltages and may become very hot during
operation.

WARNING

Before using the product, make sure that the insulation
on the test probes is undamaged and that no bare
conductors are improperly exposed. Using the product
under such conditions could result in electrocution.
Replace the test probes specified by Hioki .
Do not use the product where it may be exposed to
corrosive or combustible gases. The product may be
damaged or cause an explosion.
Do not use the product where it may be exposed to

corrosive or combustible gases. The product may be
damaged or cause an explosion.

Notes on Use

Follow these precautions to ensure safe operation and to
obtain the full benefits of the various functions.

viii

_____________________________________________________________________

Notes on Use

______________________________________________________________

CAUTION

This product is not designed to be entirely water- or dust­proof. To avoid damage, do not use it in a wet or dusty
environment.
This product should be installed and operated indoors only,
between 0 and 40

80% RH or less. Do not use the unit
in direct sunlight, dusty conditions, or in the presence of
corrosive gases.
Do not store or use the product where it could be exposed
to direct sunlight, high temperature or humidity, or
condensation. Under such conditions, the product may be
damaged and insulation may deteriorate so that it no longer
meets specifications.
Do not use the product near a device that generates a
strong electromagnetic field or electrostatic charge, as
these may cause erroneous measurements.
To avoid damage to the product, protect it from vibration or
shock during transport and handling, and be especially
careful to avoid dropping.
To avoid electrocution, turn off the power to all devices
before pluggingor unplugging any of the interface
connectors. Be sure to connect properly to avoid short­circuit.
Because external I/O INT.GND terminal, RS-232C
connector frame, ground terminal and analog output GND
terminal are grounded, all equipment connected with GND
terminals are grounded. Use caution when handling. If the
equipment has an electric potential against the earth, a
short-circuit accident may occur.

1

_____________________________________________________________________

Outline

______________________________________________________________

Chapter 1

Outline

1.1 Product Introduction

1.2 Features

HIOKI 3154 DIGITAL MΩ HiTESTER performs insulation
resistance testing on components and equipment using
direct current voltage. Comparator and timer functions
facilitate easy and accurate insulation resistance testing.
Equipped with six selectable test voltages and external I/O,
RS-232C interface and analog output terminal, HIOKI 3154
DIGITAL MΩ HiTESTER proves its efficiency and
versatility from laboratory to production and inspection line
testing.

(1) Easy Testing in accordance with safety standards

Select from six test voltages from 25 V to 1000 V.
Pass/Fail judgment function comparing measured value
by setting lower limit value and timer function support
wide variety of insulation resistance testing according to
safety standards.

(2) Easy-to-read display

High definition LED display

2

_____________________________________________________________________

Outline

______________________________________________________________

(3) Saves Setting Conditions

Saves up to ten testing conditions including lower limit
value to quickly change conditions for various
standards.
Also restarts with values saved at power shutdown when
power is turned on.

(4) External Interface

External I/O outputs signals according to 3154 status
and inputs start/stop signals. Additional test conditions
can be selected.
Records extended insulation resistance fluctuations
using analog output.

(5) Equipped with RS-232C Interface

Use personal computer for automated testing and
recording test results. Optional 9442 PRINTER
provides measurement data printing.

(6) Optional Push Switch Probe

9299 SWITCHED PROBE enables efficient manual
testing.

(7) Automatic Discharge Function

Automatically discharges any charge buildup in
measured object after testing.
TEST lamp blinking during discharge indicates
discharge status.
Protects equipment from possible damage during
successive insulation resistance testing.

3

_____________________________________________________________________

Outline

______________________________________________________________

1

2

4

3

6

5 7

1. Sampling lamp Blinks during resistance measurement.

2. Measurement value
display

Displays measured resistance value.

3. Judgment result
display lamp

Displays comparator PASS/FAIL results.

4. Lower limit display Displays comparator lower limit value.

5. DELAY lamp (Delay
time setting lamp)

On when delay time is set.

6. Timer display Displays test duration or delay time.

7. Test voltage display Displays test voltage.

1.3 Controls and Functions

1.3.1 Displays

4

_____________________________________________________________________

Outline

______________________________________________________________

1

6 7 8 9 10 11

2 543

13 1412 15

1. Measurement
terminals

Connect test probes. High voltage occurs
between terminals continuously electrically
connected to rear panel measurement terminals.

2. TEST lamp Turns on during testing. Blinks during

discharging buildup in tested object.

3. / key Press to change settings.

LOAD/SAVE

key

Press SHIFT key - LOAD/SAVE key to save and
load setting conditions.

4. START key Press to start testing.

5. STOP key Press to terminate testing or to confirm settings.

6. EXT.SW
terminal

Switch signal terminal for optional 9299
SWITCHED PROBE.

7. REMOTE lamp Turns on when communicating with personal

computer via RS-232C.

8. LOCK lamp Turns on when key lock is engaged.

9. LOCK key Press to engage or disengage key lock.

MΩ RANGE

key

Press SHIFT key - MΩ RANGE key to change to
and from auto range/manual range.

10. COMP key Press to set comparator.

BEEP key Press SHIFT key - BEEP key to set beep sound.

11. TIMER key Press to set test duration and delay time.

SPEED key Press SHIFT key - SPEED key to set

measurement speed.

1.3.2 Front Panel

5

_____________________________________________________________________

Outline

______________________________________________________________

12. VOLT key PRESS to set test voltage.

13. SHIFT lamp Turns on when SHIFT key is pressed.

14. SHIFT key Press to engage shift.

When SHIFT key is pressed, shift is engaged and
SHIFT lamp turns on. Press again to disengage
shift.
When shift is engaged, functions displayed in
blue below keys become valid.

15. Handle/Stand Adjust handle to use as a stand.

21 3 4 5 6

1. Power supply
connector

Terminal to connect power cord. (Internal fuse
type)

2. POWER switch Turns power ON/OFF.

3. Analog output
terminal

Converts measured resistance value and
outputs voltage.
Use to connect 9094 OUTPUT CORD.

4. RS-232C terminal Use to connect RS-232C for remote operation

or optional 9442 PRINTER.

5. External I/O
terminals

Outputs 3154 status and inputs start/stop and
test voltage switching signals.

6. Rear
measurement
terminals

Connect test probes. High voltage occurs
between terminals. Continuously electrically
connected to front panel measurement
terminals.

1.3.3 Rear Panel

6

_____________________________________________________________________

Outline

______________________________________________________________

7

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

Connecting Cord and Probes

Using Handle

Connecting to Equipment to be tested

Connecting Power Cord

Powering On and Off the Unit

See 2.1.

Preparation for Testing

Testing

Setting Basic Testing Conditions

See 2.2.

See 2.3.

See 2.4.

See 2.5.

See Chapter 3.

See Chapter 4.

NOTE

See 4.7 Testing with SWITCHED PROBE to conduct
measurement using 9299 SWITCHED PROBE.

Chapter 2

Preparation for Testing

Before testing preparation, read each note carefully.

8

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

WARNING

The unit is constructed so as to be connected to a
ground line via a three-core power cord that is supplied
with the unit.

To avoid electric shock and ensure safe operation,
connect the power cable to a grounded (3-contact)
outlet.

Before turning the product on, make sure the source
voltage matches that indicated on the product's power
connector. Connection to an improper supply voltage
may damage the product and present an electrical
hazard.

To avoid damaging the pow er cord, grasp the plug, not
the cord, when unplugging the cord from the power
outlet.

(example)

Insert the plug into

the outlet

2.1 Connecting Power Cord

Connecting Power Cord

(1) Verify that the 3154 POWER switch is OFF ( O ).

(2) Connect power cord supplied with the 3154 to power

supply connector located in the back.

(3) Connect power cord plug to grounded dual polarity

power outlet.

9

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

POWER switch

2.2 Powering On and Off the Unit

Powering On

(1) Turn POWER switch ON ( I ) on the rear panel.
(2) All displays light up displaying product name and

software version.

(3) Returns to normal READY status for use with settings

saved prior to turning power off.
For stable measurement readings, allow thirty minutes
or more to warm up after turning power on.

Powering Off

Turn POWER switch OFF (O) on the rear panel. Settings
are saved when turning power off.

10

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

WARNING

To avoid the risk of electric shock, be sure to press the
3154 STOP key and confirm that the TEST lamp is off
before connecting/disconnecting probes. Do not keep
power on equipment to be tested when connecting
probes.

Before using the product, make sure that the insulation
on the test probes is undamaged and that no bare
conductors are improperly exposed. Using the product
under such conditions could result in electrocution.
Replace the test specified by Hioki .

CAUTION

For safety reasons, only use the optional CONNECTION
CORD, 9257 and TEST PROBEs, 9289 or 9294, provided
with the unit for measurement.

To avoid damaging the probes, do not bend or pull the probes.

9289 TEST PROBE 9294 TEST PROBE

2.3 Connecting Cord and Probes
(9257, 9289, 9294)

Although measurement terminals are both located in the front
and rear panels, both cannot be used at the same time. Leave
one side disconnected.
The 9257, 9289 and 9294 come with protective caps. Take the
caps off before connecting to 3154.
Connect black probe to LOW terminal and red probe to HIGH
terminal. Tightly insert probes all the way into the terminals.

See 8.4 Options and specifications, about the 9257
CONNECTION CORD.

11

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

CAUTION

When using the handle as a stand for the device, do not
press down too hard on the device as this can damage the
handle.

When interface cable, etc. is connected to the rear panel,
keep the unit flat to avoid damaging the cable.

When setting the unit to show display upward, tilt it
carefully to avoid damaging power cord by excessive
stress.

2.4 Using Handle

Handle can be used as stand. Pull out the side, turn and
press in the handle.
Handle turns each 22.5

.

When setting flat, turn the handle over the unit.

12

_____________________________________________________________________

Preparation for Testing

______________________________________________________________

WARNING

Observe the follow ing precautions to avoid electric
shock.

To avoid the risk of electric shock, turn power off on

equipment to be tested.

Before and after testing, do not touch equipment to be

tested and probe tip when TEST lamp is on or blinking.

Afte r testing is complete, confirm that the 3154 TEST
lamp is off before disconnecting probe from equipment
to be tested.

CAUTION

When connecting probe to equipment to be tested under
TEST status, verify the voltage occurred on the display
before connecting. Improper voltage may damage
equipment to be tested.

NOTE

When 3154 is in READY status, approximately a voltage
greater than +10 V volts in equipment to be tested initiates
TEST lamp, and blinks after connecting probe.
When connecting the LOW side of the measurement terminal
with the earth, there is a possibility that a measurement value
smaller than the actual value may be displayed. As such,
when conduction an insulation test with the earth, be sure to
ground the measurement object, and connect the HIGH side of
the terminal with the earth.

2.5 Connecting to Equipment to be tested

Connect probe to equipment to be tested.

13

_____________________________________________________________________

Setting Basic Testing Conditions

______________________________________________________________

Setting comparator

Setting timer

Setting lower limit value

Setting test mode

Setting test duration

Setting delay time

・See Chapter 2

Pre

p

aration for Testing.

・

When using PASS/FAIL
judgment, set lower limit
value. See 3.2.1.

・

When using PASS/FAIL
judgment, set test mode.

See 3.2.2.

・

Set test duration. See 3.4.1

・

Set delaytime. See 3.4.2.

・See Cha

p

ter 4 Testing.

Setting test voltage

・

Select from 25 V to 1000 V.

See 3.1.

Setting resistance range

・

Set either manual range
(4 types) or auto range.

See 3.3.

Setting sampling rate

・

Set FAST or SLOW.

See 3.5.

Preparation for testing

Setting testing conditions

Start testing

Chapter 3

Setting Basic Testing

Conditions

The below shows setting items and procedures.

14

_____________________________________________________________________

Setting Basic Testing Conditions

______________________________________________________________

CAUTION

Setting at improper voltage may damage equipment to be

tested.

Test voltage can be set by external I/O. In this case, the
3154 test voltage display lamp stays on displaying previous
voltage until testing starts after setting voltage from external
I/O. Do not start the test simply by confirming the voltage
display lamp, as unexpected voltage may be generated.
Start the test only after you have confirmed the test voltage
setting of the external I/O.

Test voltage indicator lamp

NOTE

During READY status, TEST status, test voltage can be verified

by blinking test voltage indicator lamp.

When selecting test voltage with external I/O, test voltage
cannot be set by key press. Set all external I/O VOLT0 to
VOLT2 to LOW or HIGH (not necessary to connect) use key
press for setting.

3.1 Setting Test voltage

Set and select test voltage from 25 V to 1000 V. To set
comparator at each voltage, selecting another voltage
automatically changes lower limit value.

Setting test voltage

(1) When READY status (with TEST lamp off or blinking),

press VOLT key to initiate test voltage display lamp to
blink. (Setting)

(2) Press

/ key to select test voltage to start and test

voltage indicator lamp starts blinking.

(3) Press STOP key or VOLT key to complete setting with

test voltage indicator lamp no longer blinking but on
and returns to READY status.

15

_____________________________________________________________________

Setting Basic Testing Conditions

______________________________________________________________

Lower limit value(MΩ) Resistance range

0.1/0.2/0.3/0.4/0.5/0.6/0.7/0.8/0.9/1/2 2MΩ

2/3/4/5/6/7/8/9/10/20 20 MΩ

20/30/40/50/60/70/80/90/100/200 200 MΩ

200/300/400/500/600/700/800/900/1000/2000
/3000/4000 (Limited to test voltage 500 V,
1000 V for 3000/4000)

2000 MΩ

(4000 MΩ range for

500 V, 1000 V)

NOTE

RS-232C Interface provides an option to set lower limit value at
any value within the measurement range in addition to the
displayed selection. Once designated lower limit value is
switched to another by key press, use RS-232C Interface to reset
at designated lower limit value.

3.2 Setting and Verifying Comparator

3.2.1 Setting Lower Limit Value

When comparator is set, set lower limit value and test
mode. Execute PASS/FAIL judgment by comparing value
set as lower limit value and measurement value.
Lower limit value determines resistance range for setting
(manual range). See the chart below for possible
combination of lower limit value and resistance range for
setting.
When auto range is selected for resistance range, lower
limit value is not limited at any value.
Improper combination of lower limit value and resistance
range results in incorrect PASS/FAIL judgment.
See 3.3 Setting and Verifying Resistance Range to set
resistance range.

Lower limit value chart