Hioki 3638-20 Instruction Manual

INSTRUCTION MANUAL

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3638-20

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LEAK LOGGER

Contents

Introduction i
Inspection i
Safety Notes ii
Notes on Use v
Measurement Flow Chart and Reference Guide viii

Chapter 1 Product Outline 1

1.1 Name and Functions of Parts 2

1.2 Interval and Maximum Recording Time

1.3 Measurement Value Recording Modes

1.4 Leak Current Measurement

1.5 Load current measurement

Chapter 2 Set Up 9

2.1 Replacing the Battery 9

2.2 Power Save Function

2.3 Setting Current Time

2.4 Connecting Sensor Cable

11

12

12

3

5

6

8

Chapter 3 Settings 15

3.1 Setting Items 15

3.2 Manual Setting

3.3 Setting by COMMUNICATION BASE

20

22

Chapter 4 Specifications 25

Chapter 5 Maintenance and Service 27

_____________________________________________________________________

Introduction

Thank you for purchasing the Hioki 3638-20 LEAK
LOGGER. To obtain maximum performance from the
instrument, please read this manual first, and keep it handy
for future reference.

Inspection

When you receive the instrument, inspect it carefully to
ensure that no damage occurred during shipping. If damage
is evident, or if it fails to operate according to the
specifications, contact your dealer or Hioki representative.

Accessories

9632 CONNECTION CABLE
Instruction Manual
LR03 alkaline battery
(built into this unit, for monitor)

4

X

i

Before using the product the first time, verify that it
operates normally to ensure that the no damage occurred
during storage or shipping. If you find any damage, contact
your dealer or Hioki representative.

NOTE

______________________________________________________________

Testing monitor batteries installed in the unit may possibly be
weak. Replace batteries before extended measurement usage.
Before using the product, make sure that the insulation on the
sensor cables is undamaged and that no bare conductors are
improperly exposed. Using the product in such conditions could
cause an electric shock, so contact your dealer or Hioki
representative for repair.

Inspection

ii

R

_____________________________________________________________________

SafetyNotes

This instrument is designed to conform to IEC 61010
Safety Standards, and has been thoroughly tested for

DANGE

Safety Symbols

safety prior to shipment. However, mishandling
during use could result in injury or death, as well as
damage to the instrument. 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.

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

The symbol printed on the instrument indicates that
the user should refer to a corresponding topic in the
manual (marked with the
relevant function.
In the manual, the symbol indicates particularly
important information that the user should read before
using the instrument.

symbol) before using the

Indicates DC (Direct Current).

______________________________________________________________

Safety Notes

_____________________________________________________________________

R

iii

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

Indicates that incorrect operation presents an extreme

DANGE

WARNING

CAUTION

NOTE

hazard that could result in serious injury or death to
the user.

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

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

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

Accuracy

The specifications in this manual include figures for
"measurement accuracy" when referring to digital
measuring instruments, and for "measurement tolerance"
when referring to analog instruments.

f.s.

(maximum display or scale value, or length of scale)
Signifies the maximum display (scale) value or the length
of the scale (in cases where the scale consists of unequal
increments or where the maximum value cannot be
defined).
In general, this is the range value (the value written on
the range selector or equivalent) currently in use.

rdg.

(displayed or indicated value)
This signifies the value actually being measured, i.e., the
value that is currently indicated or displayed by the
measuring instrument.

dgt.

(resolution)
Signifies the smallest display unit on a digital measuring
instrument, i.e., the value displayed when the last digit on
the digital display is "1".

______________________________________________________________

Safety Notes

iv

_____________________________________________________________________

Measurement categories (Overvoltage categories)

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.

CAT I

CAT II

CAT III

CAT IV

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

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

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

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

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.

______________________________________________________________

Safety Notes

_____________________________________________________________________

R

Notes on Use

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

This product cannot be used on following voltage lines.

v

DANGE

If the voltage exceeds, there will be a short-circuit
accident or electrocution accident will result.
CAT III, AC300 Vrms for 9657
CAT III, AC150 Vrms for 9658
To avoid short circuits and potentially life-threatening
hazards, never attach the clamp-on leak sensor to a
circuit that operates at more than the following
maximum rated voltage to earth.
AC300 Vrms for 9657
AC150 Vrms for 9658
Clamp-on leak sensor should only be connected to the
secondary side of a breaker, so the breaker can prevent
an accident if a short circuit occurs. Connections
should never be made to the primary side of a breaker,
because unrestricted current flow could cause a
serious accident if a short circuit occurs.
For model 9657
When conductors being measured carry in excess of
the safe voltage level (SELV-E)

and not more than 300
V, to prevent short circuits and electric shock while the
clamp core jaw is open, make sure that conductors to
be measured are insulated with material conforming to
(1) Measurement Category III

, (2) Pollution Degree 2,
and (3) Basic Insulation Requirements for Working
Voltages of 300 V.

______________________________________________________________

Notes on Use

vi

R

_____________________________________________________________________

For model 9658

DANGE

When conductors being measured carry in excess of
the safe voltage level (SELV-E)

and not more than 150

V, to prevent short circuits and electric shock while the
clamp core jaw is open, make sure that conductors to
be measured are insulated with material conforming to
(1) Measurement Category III

, (2) Pollution Degree 2,
and (3) Basic Insulation Requirements for Working
Voltages of 150 V.
Refer to the following standards regarding the
meanings of underlined terms.
IEC61010-1
IEC61010-2-031
IEC61010-2-032

To avoid electric shock, do not allow the product to

WARNING

get wet, and do not use it when your hands are wet.

When measuring the ground conductor on a

transformer Class 2 connection site, be careful not to
approach high voltage devices or conductors. Also, if
close to high voltage charging devices or if
measurement is otherwise difficult, first change the
route of the grounding wire.

To avoid damage to the product, protect it from

vibration or shock during transport and handling, and
be especially careful to avoid dropping.

This is a precision instrument: do not clamp any

foreign objects in the end of the clamp core, or insert
anything in the core gap.

Do not exert excessive pressure on the clamp sensor

or attempt to wedge the sensor into a tight spot for
measurement.

______________________________________________________________

Notes on Use

_____________________________________________________________________

vii

CAUTION

NOTE

To avoid electric shock when measuring live lines, wear
appropriate protective gear, such as insulated rubber
gloves, boots and a safety helmet.
This product is designed for indoor use, and operates
reliably from 0

to 50 .
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.

Accurate measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high­current conductors, or in the presence of strong electromagnetic
fields such as near radio transmitters.

______________________________________________________________

Notes on Use

viii

_____________________________________________________________________

Measurement Flow Chart and Reference Guide

Is there sufficient

battery charge remaining

to operate 3638

Setting current time

Connecting sensor

Setting 3638-20
stand-alone

・Interval
・Number of

channels

・Recording mode
・Range

See 3.2.

Press REC/STOP
button to start
measurement.

See 3.2.

When recording data
reaches 32000
(

16000 in 2 channels

measurement stops.

),

-20?

Set current time when using 3638-20 for the
first time or replacingbatteries. See 2.3.

See 2.4.

Setting 3638-20 with
COMMUNICATION BASE

・Interval
・Current time
・Start control
・Recording method

Quick start

Starts measurement
immediately.

One time

When recording data exceeds 32000(
overwrites previously recorded data.

Press REC/STOP button to stop measurement.

Replace batteries

COMMUNICATION BASE and PC

・Interval ・Current time
・Start control ・Range
・Recording method
・Number of channels
・Recording mode
・Alarm ・Comment

No

recordingmethod

Settingstart control

Start control options

Starts measurement at
prescheduled time.

Setting

Setting 3638-20 with

Endless

16000 in 2 channels

See 2.1.

Yes

Prescheduled start

), it

After measurement is complete, disconnect sensor cables.
Use COMMUNICATION BASE to send measurement data to personal computer.
(See COMMUNICATION BASE instruction manual.)

______________________________________________________________

Measurement Flow Chart and Reference Guide

_____________________________________________________________________

1

Chapter 1

Product Outline

3638-20 LEAK LOGGER with clamp on leak sensor
records 1 or 2 channels of data at leakage current value.
It measures and records AC RMS current values of up to 1
Arms at fixed intervals.
With two optional recording modes; recording maximum
value and recording average value, extended duration of
current recording is possible with battery operation.
Data is saved in nonvolatile memory when batteries are
weak or removed for replacement.

NOTE

______________________________________________________________

3638-20 LEAK LOGGER cannot be set with 3910-20
COMMUNICATION BASE.

Product Outline

2

_____________________________________________________________________

1.1 Name and Functions of Parts

1

2

3

6

7

4

8

5

1. LCD Displays measurement value and settings.

2. Optical data transfer
ports

3. INTERVAL button Calls up interval setting display to set interval,

4. MAX./MIN. button Displays maximum value or minimum value of

5. Clamp connection
terminal

6. REC/STOP button Pressing more than 1 second initiates or stops

(SELECT) button Interval is selected in interval setting display.

7. Alarm output
terminal

8. 100/1000 mA
button

Enables optical data transfer to
COMMUNICATION BASE.

recording mode and measurement channels.

recorded data.

Connects 9657/9658 CLAMP ON LEAK
SENSOR.

recording.

Connects 9632 CONNECTION CABLE and
outputs alarm signal (open drain output).

Changes measurement range from 100/1000
mA.

______________________________________________________________

Product Outline

_____________________________________________________________________

1.2 Interval and Maximum Recording Time

Interval and maximum recording time (when power save
function is valid) are as follows.
When 3638-20 LEAK LOGGER is used in 2 channels,
maximum recordable data is 16000 per unit.

INTVL Maximum Recording Time

1s 4h26min40s

2s 8h53min20s

5s 22 h 13 min 20 s

10 s 1 day 20 h 26 min 40 s

15 s 2 day 18 h 40 min

20 s 3 day 16 h 53 min 20 s

30 s 5 day 13 h 20 min

1min 11 day 2 h 40 min

2min 22 day 5 h 20 min

3

5min 55 day 13 h 20 min

10 min 111 day 2 h 40 min

15 min 166 day 16 h

20 min 222 day 5 h 20 min

30 min 333 day 8 h

60 min 666 day 6 h

*

*

*

*

*

*

*: Maximum recording time is limited by battery charge

condition.

______________________________________________________________

Product Outline

4

_____________________________________________________________________

When 3638-20 LEAK LOGGER is used in 1 channel,
maximum recordable data is 32000 per unit.

INTVL Maximum Recording Time

1s 8h53min20s

2s 17 h 46 min 40 s

5s 1 day 20 h 26 min 40 s

10 s 3 day 16 h 26 min 40 s

15 s 5 day 13 h 20 min

20 s 7day9h46min40s

30 s 11 day 2 h 40 min

1min 22 day 5 h 20 min

2min 44 day 10 h 40 min

5min 111 day 2 h 40 min

10 min 222 day 5 h 20 min

15 min 333 day 8 h

20 min 444 day 10 h 40 min

30 min 666 day 6 h

60 min 1333 day 8 h

*

*

*

*

*

*

*

*: Maximum recording time is limited by battery charge

condition.

______________________________________________________________

Product Outline

_____________________________________________________________________

p

1.3 Measurement Value Recording Modes

Effective value calculation

To calculate effective value, measurement signal is sampled
every 334 µs and operation is carried out from data with
maximum 135 points to seek effective value.

Maximum 135 points partitioned
at com

lete cycle

334µs

Recording

To record measurement value, calculate effective value per
1 second or 0.2 second and record average or maximum
value of all data within interval in memory.
After recording starts, average or maximum value within
interval is recorded, so the initial data is not recorded
immediately after recording starts but is recorded from the
following interval.

Interval

1 or 0.2 second interval

5

Effective

value

Recordingstarts

Average

value

Interval

Recording average value

Recording

Records average/maximum value

Effective

value

Maximum

value

Interval

Recording maximum value

______________________________________________________________

Product Outline

Recording

6

_____________________________________________________________________

1.4 Leak Current Measurement

Clamp the sensor on the conductor, so that the conductor
passes through the center of the clamp core. For
measurement of grounded leads, clamp the sensor on one
lead only (see a). For overall measurements, clamp the
sensor on the entire circuit path (see b).

NOTE

When the current to be measured is unknown, begin
measurement with the 1000 mA range selected.

Single-phase 3-lead circuits

Transformer

Ig: leak Current

Class 2 grounding line

Three-phase 3-lead
circuits

Ig

a

E

2

Class 2 grounding line

a

Ig

E

Clamp all three leads of the circuit

b

Clamp all three leads

b

2

of the circuit

b

Load
device

b

Load

device

a

E

Class 3 grounding line

3

NOTE

For measurement of single-phase 2-lead circuits, clamp both
leads of the circuit.
For measurement of three-phase 4-lead circuits, clamp all four
leads of the circuit. If this is not possible, the measurement can
also be carried out on the ground lead of the equipment.

______________________________________________________________

Product Outline

_____________________________________________________________________

7

NOTE

If a strong current (on the order of 100 A) is flowing in an
adjacent circuit, accurate measurement may not be possible.
Perform the measurement at a sufficient distance from other
current-carrying conductors.
Do not input a current which exceeds the maximum continuous
input rating.
When the clamp is open and while the range is being changed,
an indicated value in the range of tens may appear; this is not a
malfunction.
The indication goes progressively to zero, but this make take a
little time. Beginning measurement before the display reaches
zero has no effect on measurement.

Checking for insulation faults

Normally, for a type 2 grounding installation of a
transformer, the measurement will first be made to check
for overall circuit leak current in the ground lead (a).
Current changes can be used to diagnose the leak current
condition.
When leak current has been detected, the measurement
should proceed from the power source towards the load,
using overall measurement.

1. If an insulation fault in the wiring has occurred at
position A in the illustration, leak current will be
detected at position b using overall measurement, but not
at position b'.

2. If an insulation fault in the load equipment has occurred
at position B in the illustration, leak current will be
detected at position c using overall measurement, but not
at position c'.

b

b′

Single-phase
3-lead circuits

c

c′

a

Ig

E

2

A

Load

device

Load

device

B

______________________________________________________________

Product Outline

8

_____________________________________________________________________

1.5 Load current measurement

Be sure to clamp only one lead of the conductor. Clamp so
that the conductor is in the center of the sensor aperture.

OK NG

NOTE

The frequency of special waveforms such as at the secondary
side of an inverter can not be indicated correctly.
When the current to be measured is unknown, begin
measurement with the 1000 mA range selected.
Do not input a current which exceeds the maximum continuous
input rating.

______________________________________________________________

Product Outline

_____________________________________________________________________

9

Chapter 2

Set Up

2.1 Replacing the Battery

To avoid electric shock when replacing the batteries,

WARNING

first disconnect the connection cables from the object
to be measured.
During battery replacement, use caution not to put any
foreign materials such as a metal object into the unit
to avoid damage to the unit.
Before using the product after replacing the batteries,
replace the cover and screw.
Do not mix old and new batteries, or different types of
batteries. Also, be careful to observe battery polarity
during installation. Otherwise, poor performance or
damage from battery leakage could result.
To avoid the possibility of explosion, do not short
circuit, disassemble or incinerate batteries.
To avoid corrosion from battery leakage, remove the
batteries from the product if it is to be stored for a
long time.

CAUTION

______________________________________________________________

When exchanging the batteries, the circuit may sometimes
short circuit due to static electricity. As far as possible, do not
touch the base board with bare hands.

Set Up

10

_____________________________________________________________________

Installing new batteries ensures about one month of
recording (when interval is set at 1 sec) and about 10 days
of recording (when interval is set at 0.2 sec). (reference
value with power save setting set to valid and at 20
Remaining battery power indicator (

)indicates

)

remaining battery life reducing incrementally from right.
Empty battery power indicator (

) indicates time to

replace batteries.

1. Remove back cover screw to remove cover. Verify
polarity and install four new LR03 alkaline batteries.

2. Fit cover properly and tighten screw.

______________________________________________________________

Set Up

_____________________________________________________________________

11

2.2 Power Save Function

Display window is automatically turned off in
approximately 15 seconds after last key entry. (Sleep)
However, while recording, REC/AV/ / / AL mark
shows each conditions.

Sleeping......

Press any button to turn display on to display measurement
value or to set settings.
Note when interval setting display is on, sleep does not
engage with no button press.

Initially, power save function is on. To turn off power save
function, follow the instructions below.
When power save function is off, maximum continuous
duration is approximately 10 days.

1. Connect logger, COMMUNICATION BASE and

personal computer.

2. Start up application software packaged with

COMMUNICATION BASE.

3. Go to Communications on the menu bar and select

Power Save Options. Choose Off to turn off power save
function.

NOTE

______________________________________________________________

See COMMUNICATION BASE instruction manual to connect
logger and to install application software. To use application
software, see operation guide.

Set Up

12

_____________________________________________________________________

2.3 Setting Current Time

When replacing 3638-20 LEAK LOGGER batteries or
using 3638-20 stand-alone (with manual operation) for the
first time, connect with COMMUNICATION BASE and set
current time.

See how to set current time in COMMUNICATION BASE
instruction manual.

2.4 Connecting Sensor Cable

Maximum input current is 1 Arms. Do not exceed the

WARNING

continuous maximum input current.
This product cannot be used on following voltage
lines. If the voltage exceeds, there will be a short­circuit accident or electrocution accident will result.
CAT III, AC300 Vrms for 9657
CAT III, AC150 Vrms for 9658
When connecting the clamp on leak sensor, if a
metallic part of the sensor exposed while the clamp is
open should touch the two wires of the line, or if the
sensor is used on a bare conductor, a shorting
accident or electric shock may result.
The 3638-20 measurement range is set at 100 mA, do
not exceed 100 mArms.
To avoid damaging the unit, do not use any other
sensors except 9657/9658 CLAMP ON LEAK SENSOR
as sensor connector.

______________________________________________________________

Set Up

_____________________________________________________________________

Connecting clamp on leak sensor

3638-20 LEAK LOGGER enables 2 channels of data
measurement when connected with 9657/9658 CLAMP ON
LEAK SENSOR.

9657/9658 CLAMP ON LEAK SENSOR

13

9658

NOTE

9657

Carefully read 9657/9658 CLAMP ON LEAK SENSOR
instruction manuals before use.
Improper measurement method may result in accidental injury,
death or damage in the unit.

______________________________________________________________

Set Up

14

_____________________________________________________________________

Connecting 9632 CONNECTION CABLE

Connecting 9632 CONNECTION CABLE to alarm output
terminal.When connecting connection cable, securely insert

connection cable to unit as designated by triangle mark ▲

on connection terminal.
Improper connection results in failure to output accurate
signal.

9632 CONNECTION CABLE

9632 CONNECTION CABLE

GND

Non connection

Signal

Cord length: 1000 mm

White: Signal
Black: GND

______________________________________________________________

Set Up

_____________________________________________________________________

Chapter 3

Settings

3.1 Setting Items

Logger stand-alone manual settings and settings in
combination with COMMUNICATION BASE with
measurement conditions stored in memory loaded from
personal computer.

15

3638-20+

3638-20

1. Start recording Valid Valid Valid

2. Stop recording Valid --- ---

3. Interval setting Valid Valid Valid

4. Current time setting --- Valid Valid

5. Start control --- Valid Valid

6. Recording method setting --- Valid Valid

7. Measurement interval setting Valid --- Valid

8. Range setting Valid --- Valid

9. Setting number of channels Valid --- Valid

10. Recording mode setting Valid --- Valid

11. Alarm setting --- --- Valid

12. Comments --- --- Valid

13. Minimum/Maximum value
display

NOTE

・

When PC, COMMUNICATION BASE and 3638-20 are

Valid --- ---

COMMUNICATION

BASE

3638-20+

COMMUNICATION

BASE＋PC

connected, separate range can be set in each channel. Once
settings are set, range setting with manual operation sets
common range.

・

Alarm and comment setting are available when personal
computer is connected to both logger and COMMUNICATION
BASE.

______________________________________________________________

Settings

16

_____________________________________________________________________

1. Start recording

Start manual recording by pressing logger

REC/STOP

button for 1 second or initiate by prescheduled start set
using COMMUNICATION BASE.
When time scheduled start is engaged, clock icon appears
in display. When batteries are weak, recording does not
start. During recording, weak battery interrupts recording.

2. Stop recording

Stop recording by pressing logger

REC/STOP

button for 1
second. Or recording stops automatically when data is full
when set to recording method: one time.

3. Interval setting

Set interval with logger alone or using COMMUNICATION
BASE.
(1/2/5/10/15/20/30 s, 1/2/5/10/15/20/30/60 min)

4. Current time setting

To set current time, see COMMUNICATION BASE
instruction manual.

5. Start control

Set specific recording date and time using
COMMUNICATION BASE to engage time scheduled start.
When time scheduled start is engaged, clock icon appears
in display.

6. Recording method setting

Set recording method using COMMUNICATION BASE.
Choose either one time or endless recording method.
Default setting is one time.
One time: Ends recording when data reaches 32000 (2 ch:

16000).

Endless : Overwrites previously recorded data when data

exceeds 32000 (2 ch: 16000).

______________________________________________________________

Settings

_____________________________________________________________________

17

7. Setting the measurement interval

You can set the measurement interval on the 3638-20 or
through the COMMUNICATION BASE. Select between an
interval of 0.2 sec (when measuring just 1 channel) or 1
second.
The factory setting is 1 second.

8. Range setting

With 3638-20 stand-alone, or connected with
COMMUNICATION BASE and PC, range setting is
available.
Two measurement range options are 100 mA range and
1000 mA.
Select and set in accordance with measurement current.
When manually operated, common settings apply to channel
1 and channel 2.
When 3638-20 measurement range is set at 100 mA, do not
exceed 100 mArms.

NOTE

When PC, COMMUNICATION BASE and 3638-20 are
connected, separate range can be set in each channel. Once
settings are set, range setting with manual operation sets
common range.

9. Setting number of channels

With 3638-20 stand-alone, or connected with
COMMUNICATION BASE and PC, setting is available.
Select input for channel 1 or channel 2.
At factory shipment settings, both channel 1 and channel 2
are valid.

______________________________________________________________

Settings

18

_____________________________________________________________________

10. Recording mode setting

With 3638-20 stand-alone, or connected together with
COMMUNICATION BASE and PC, setting is available.
Two recording mode options are maximum value recording
and average value recording (

displayed).

AV

At factory shipment setting, average value recording is
selected.

NOTE

NOTE

Maximum value recording mode records maximum value within
interval, so the initial data is not recorded immediately after
recording starts but is recorded from the following interval.
For example, when measurement started at 12:00 at 1 minute
intervals, the first data is data recorded when 1 minute has
passed at 12:01.

11. Alarm setting

Alarm setting is available when 3638-20,
COMMUNICATION BASE and personal computer are
connected.
Designate upper limit and lower limit value of measurement
value with personal computer to output alarm signal when
measurement value goes outside of set range. Two channels
pass individual judgment.
During signal output, AL appears on the display.

Alarm signal output terminal is an open drain output. During
signal output, signal side and GND side are internally grounded
and any other time, it remains open. When external power
supply is supplied, alarm signal can control relay or sequencer.
Maximum rate: 30 V, 200 mA (allowable loss 200 mW)

______________________________________________________________

Settings

_____________________________________________________________________

19

12. Comments

Set comments entered by personal computer to logger using
COMMUNICATION BASE. When sorting collected
recording data, comments are helpful.
Comment setting is available when personal computer is
connected to both logger and COMMUNICATION BASE.

13. Maximum/Minimum value display

3638-20 stand-alone enables maximum/minimum value
display settings. Maximum value or minimum value of
recorded data is alternately displayed.

NOTE

・

Maximum value and minimum value are from data recorded in

memory and may vary from each displayed value per second.

・

When recording method is set as endless, maximum value and
minimum value from the beginning of recording are displayed.
When old data is overwritten after extended recording, data
currently recorded may differ from displayed maximum value
and minimum value.

______________________________________________________________

Settings

20

_____________________________________________________________________

3.2 Manual Setting

3638-20 LEAK LOGGER stand-alone manual operation
settings are shown below.

(1) Interval setting

Press

INTERVAL

display to interval setting display. (
Press

SELECT

Press

INTERVAL

(2) Setting number of channels

Press

INTERVAL

Each

100/1000 mA

When channel 1 is selected, only display "
andwhenchannel2isselected,display"
When both channel 1 and channel 2 are selected, display "

" is turned on.
In these cases, the measurement interval is 1 second. When
neither "

"nor" " is lit, the measurement interval is 0.2

second (measurement on CH1 only).

button to switch measurement value

INTVL

appears.)

button to designate interval.

button to complete setting.

button to display interval setting display.

button press selects channel to be used.

"isturnedon

" is turned on.

(3) Setting recording mode

Press

INTERVAL

Each

MAX/MIN

maximum value recording and average value recording (

button to display interval setting display.

button press alternates and selects

AV

displayed).
To set maximum value recording and average value
recording, see 1.3 Measurement Value Recording Modes.

______________________________________________________________

Settings

_____________________________________________________________________

21

(4) Setting range

Press

100/1000 mA

button on monitor screen to select 100
mA or 1000 mA.
When measurement range is reselected, decimal point
moves its position.
When manual operation is conducted, common range
settings apply to both channel 1 and channel 2.

100 mA range 1000 mA range

(5) Starting and ending recording

Press

REC/STOP

data and start recording. (
Press

REC/STOP

button for 1 second to clear last recorded

appears.)

REC

button for 1 second to stop recording.
When memory is full, recording automatically stops when
recording method: one time is selected.
When batteries are weak, recording does not start. During
recording, weak batteries interrupt recording.

(6) Maximum/Minimum value display

Press

MAX/MIN

button to display maximum or minimum
value from recorded data.
Each button press alternates display.

______________________________________________________________

Settings

22

_____________________________________________________________________

3.3 Setting by COMMUNICATION BASE

1. Press logger

INTERVAL

2. When logger LCD shows

REC/STOP

button for more than 1 second to stop

button lightly to display LCD.

mark or clock icon, press

REC

recording.
During recording or waiting time before recording start
time, data transfer cannot be established with
COMMUNICATION BASE.

3. Press logger

INTERVAL

button to display interval setting

display. (INTVL appears.)

4. Connect COMMUNICATION BASE with logger.

5. Press COMMUNICATION BASE

SEND

button for more

than 1 second to send data settings to logger.

NOTE

______________________________________________________________

Settings

・Previously recorded logger data is erased when recording is

resumed. Be sure to load data to be saved to
COMMUNICATION BASE or to personal computer before
recording.

・At any other time even when interval setting display is not

shown, except during recording and waiting for recording,
communication with COMMUNICATION BASE is available.
However communication is disabled when logger is set to sleep.

_____________________________________________________________________

23

3638-20 settings in application software
COMMUNICATION UTILITY packaged with
COMMUNICATION BASE are as follows.

Go to 'Communication' on the menu bar in
COMMUNICATION UTILITY and select 'Set measurement
condition'. When measurement condition setting window is
open, select '3638-20' setting items to set settings.

NOTE

______________________________________________________________

・Comment, recording mode, measurement channel, measurement

interval, range and alarm setting are only available in 3638-20
setting items. Personal computer, COMMUNICATION BASE
and 3638-20 must be connected during setting.

・Common settings are available to be set in '3911-20, 3912-20'

setting items.

Settings

24

_____________________________________________________________________

______________________________________________________________

Settings

_____________________________________________________________________

Chapter 4

Specifications

25

Sensor types

Input AC voltage (AC25 mV/A)

Maximum input
current

Number of input 2 channels (1 or 2 channels settable)

Measurement range 0 to 1000 mA

Range structure 100.0 mA, 1000 mA

Measurement method True effective value calculation

Measurement interval 0.2 second (1 ch only), 1 second (1 or 2 ch)

Measurement accuracy

Unit + Sensor

9657:

9658:

Operating temperature
and humidity for
guaranteed accuracy
Period of guaranteed
accuracy

Temperature coefficient Accuracy X 0.05/

LCD display Measurement value, Interval, Battery status

Recording mode Recording maximum value (records maximum value

Interval 1/2/5/10/15/20/30 s, 1/2/5/10/15/20/30/60 min

Recording capacity 32,000 data X 1 channel

9657/9658 CLAMP ON LEAK SENSOR

AC35 mVrms, 50 mV peak value

Unit:

1% rdg. 5 dgt. (50/60 Hz)

2% rdg. 10 dgt. (100 mA range, 50/60 Hz)
2% rdg. 6 dgt. (1000 mA range, 50/60 Hz)

4.5% rdg. 10 dgt. (100 mA range, 50/60 Hz)

4.5% rdg. 6 dgt. (1000 mA range, 50/60 Hz)

23 5 (73 9 ), 80%RH or less

1 year

(remaining battery power indicator: 4 phases)
Unit (A), recording (REC), prescheduled( ),
average value recording (AV), maximum value (MAX),
minimum value (MIN), alarm (AL)

within interval)
Recording average value (records average value
within interval)

16,000 data X 2 channels

______________________________________________________________

Specifications

26

_____________________________________________________________________

Recording start Manual start, Prescheduled start

Recording stop Manual stop, Memory full

Recording method One time, Endless

Displaying Max/Min
value

Alarm output Turns ON (open drain output) when value goes

Data backup Available

Interface Infrared optical data transfer

Power supply LR03 alkaline battery X 4 (1.5 VDC X 4)

Maximum rated power 0.1 VA

Battery life About 10 days

Dimensions Approx. 57W X 86H X 30D mm

Mass Approx. 130 g (4.6 oz) (including batteries)

Location for use Indoors, altitude up to 2000 m

Operate temperature
and humidity range

Storage temperature
and humidity range

Accessories LR03 alkaline battery X 4

Options 3911-20 COMMUNICATION BASE

Standards Applying

Safety

Displays maximum value and minimum value.

outside previously set upper limit or lower limit.

(Data not erased by weak batteries or battery
replacement)

(temperature at 20 , power save function: valid,
measurement interval: 0.2 second)
About 1 month
(temperature at 20 , power save function: valid,
measurement interval: 1 second)

(excluding projections)/ 2.24"W X 3.39"H X 1.18"D

0to50 , 80% RH or less (no condensation)
(32 to 122 )

-10 to 60 , 80% RH or less (no condensation)
(14 to 140 )

9632 CONNECTION CABLE
Instruction Manual

3912-20 COMMUNICATION BASE
9657 CLAMP ON LEAK SENSOR
9658 CLAMP ON LEAK SENSOR

EMC

EN61326
EN61010 Pollution Degree 2

______________________________________________________________

Specifications

_____________________________________________________________________

27

Chapter 5

Maintenance and Service

Cleaning

To clean the product, wipe it gently with a soft cloth
moistened with water or mild detergent. Never use solvents
such as benzene, alcohol, acetone, ether, ketones, thinners
or gasoline, as they can deform and discolor the case.

Service

If the product seems to be malfunctioning, confirm that the
batteries are not discharged, and that the sensor cables are
not open circuited before contacting your dealer or Hioki
representative.

Error Messages

The following error may be displayed on the LCD of the
main instrument as shown below.

Error Message Meaning

ROM error

RAM error

Adjustment data error

Adjustment data is no longer available. Please send it for
repair. Contact your dealer or Hioki representative.

______________________________________________________________

Maintenance and Service

28

_____________________________________________________________________

______________________________________________________________

Maintenance and Service

HIOKI 3638-20 LEAK LOGGER

Instruction Manual

Publication date: June 2008 Revised edition 5

Edited and published by HIOKI E.E. CORPORATION

Technical Support Section

All inquiries to International Sales and Marketing Department

81 Koizumi, Ueda, Nagano, 386-1192, Japan

TEL: [phone] / FAX: [phone]

E-mail: [e-mail]

URL http://www.hioki.com/

Printed in Japan 3638A981-05

All reasonable care has been taken in the production of this manual,
but if you find any points which are unclear or in error, please
contact your supplier or the International Sales and Marketing
Department at HIOKI headquarters.
In the interests of product development, the contents of this manual
are subject to revision without prior notice.
The content of this manual is protected by copyright. No
reproduction, duplication or modification of the content is permitted
without the authorization of Hioki E.E. Corporation.

HEAD OFFICE

81 Koizumi, Ueda, Nagano 386-1192, Japan
TEL [phone] / FAX [phone]
E-mail: [e-mail] / URL http://www.hioki.com/

HIOKI USA CORPORATION

6 Corporate Drive, Cranbury, NJ 08512, USA
TEL [phone] / FAX [phone]

3638A981-05 08-06H

Printed on recycled paper