Hioki 3645-20 Instruction Manual

INSTRUCTION MANUAL

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3645-20

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VOLTAGE LOGGER

Contents

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

Chapter 1 Product Outline 1

1.1 Name and Functions of Parts 2

1.2 Interval and Maximum Recording Time

1.3 Timings of Measurement

Chapter 2 Set Up 7

2.1 Replacing the Battery 7

2.2 Power Save Function

2.3 Setting Current Time

2.4 Connecting 9639 CONNECTION CABLE

2.5 Preheat Signal

10

11

12

3

4

9

Chapter 3 Settings 15

3.1 Setting Items 15

3.2 Manual Setting

3.3 Setting by COMMUNICATION BASE

18

21

Chapter 4 Specifications 23

Chapter 5 Maintenance and Service 25

_____________________________________________________________________

Introduction

Thank you for purchasing this HIOKI "3645-20 VOLTAGE
LOGGER." To get the maximum performance from the
unit, please read this manual first, and keep this at hand.

Inspection

When the unit is delivered, check and make sure that it has
not been damaged in transit. If the unit is damaged, or fails
to operate according to the specifications, contact your
dealer or HIOKI representative.

Accessories

9639 CONNECTION CABLE
9632 CONNECTION CABLE
Instruction Manual
LR03 alkaline battery X 4 (built into this unit, for monitor)

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
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 equipment is designed according to IEC 61010
Safety Standards, and has been tested for safety prior

DANGE

Safety Symbols

to shipment. Incorrect measurement procedures
could result in injury or death, as well as damage to
the equipment. Please read this manual carefully and
be sure that you understand its contents before using
the equipment. The manufacturer disclaims all
responsibility for any accident or injury except that
resulting due to defect in its product.

This Instruction Manual provides information and warnings
essential for operating this equipment in a safe manner and
for maintaining it in safe operating condition. Before using
this equipment, be sure to carefully read the following
safety notes.

This symbol is affixed to locations on the equipment
where the operator should consult corresponding topics
in this manual (which are also marked with the
symbol) before using relevant functions of the
equipment.
In the manual, this mark indicates explanations which it
is particularly important that the user read before using
the equipment.

Indicates DC (Direct Current).

______________________________________________________________

Safety Notes

_____________________________________________________________________

R

iii

The following symbols are used in this Instruction Manual
to indicate the relative importance of cautions and
warnings.

Indicates that incorrect operation presents extreme

DANGE

WARNING

CAUTION

NOTE

danger of accident resulting in death or serious injury
to the user.

Indicates that incorrect operation presents significant
danger of accident resulting in death or serious injury
to the user.

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

Denotes items of advice related to performance of the
equipment or to its correct operation.

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)

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.

CAT I

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

CAT II

CAT III

CAT IV

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

In order to ensure safe operation and to obtain maximum
performance from the unit, observe the cautions listed
below.

The maximum input voltage is 60 V DC. Attempting

v

DANGE

WARNING

to measure voltage in excess of the maximum input
could destroy the product and result in personal injure
or death.

To avoid electric shock, do not allow the product to get
wet, and do not use it when your hands are wet.
To avoid electric shock, shut off the line power supply
before connecting the connection cable to the
terminals.

CAUTION

To avoid electric shock, before replacing the connection
cable, remove the all connection cable from the device to
be measured.
To avoid damaging connection cable (especially where the
leads connect to the probes), do not kink or pull on the
leads.
This product is designed for indoor use, and operates
reliably from 0

to 40 .
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.
This product is not designed to be entirely water- or dust­proof. To avoid damage, do not use it in a wet or dusty
environment.

______________________________________________________________

Notes on Use

vi

_____________________________________________________________________

Measurement Flow Chart and Reference Guide

Is there sufficient

battery charge remaining

to operate 3645-20

Setting current time

Connecting sensor

Setting 3645 stand­alone

・Interval
・Preheat time
・Range

See 3.2.

Press REC/STOP
button to start
measurement.

See 3.2.

When recording data
reaches 32000,
measurement stops.

?

Set current time when using 3645-20 for the
first time or replacingbatteries. See 2.3.

See 2.4.

Setting 3645 with
COMMUNICATION
BASE

・Interval・Current time
・Start control
・Recording method

Manual start

Starts measurement
immediately.

One time

When recording data exceeds 32000, it overwrites
previously recorded data.

Replace batteries

COMMUNICATION BASE and

・Interval ・Preheat time
・Current time ・Start control
・Recording method
・Comment

No

recordingmethod

Settingstart control

Start control options

Starts measurement at
prescheduled time.

Setting

Setting 3645 with

Endless

PC

Yes

Time prescheduled
start

See 2.1.

Press REC/STOP button to stop measurement.

After measurement is complete, disconnect connection cord.
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

3645-20 VOLTAGE LOGGER enables measurement with
intervals and recording up to
This logger is designed with four measurement ranges
covering
the outputs of various types of sensors, and the voltages of
diverse devices and power supplies. The 3645-20 comes
equipped with a Preheat function. When a synchronized
Preheat signal is used in the measurement, the logger allows
control of the power supply to various types of sensors.
Data is saved in nonvolatile memory when batteries are
weak or removed for replacement.

50 mV to 50 V, to enable measurement of

50 VDC.

NOTE

______________________________________________________________

3645-20 cannot be set with 3910-20 COMMUNICATION
BASE. Use 3911-20, 3912-20 COMMUNICATION BASE to set
3645-20.

Product Outline

2

(

_____________________________________________________________________

1.1 Name and Functions of Parts

LCD

Optical data
transferports

INTERVAL
button

Connection terminal

LCD Displays measurement value and settings.

Optical data transfer
ports

INTERVAL button Calls up interval setting display to set interval

Connection terminal Connects 9639 CONNECTION CABLE.

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

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

Preheat output
terminal

RANGE button Changes measurement range from 50 mV/500

Enables optical data transfer to
COMMUNICATION BASE.

and preheat time.

recording.

When the 9632 CONNECTION CABLE is
plugged into this terminal, it outputs the
Preheat signal (open-collector output).

mV/5 V/50 V.

REC/STOP button

SELECT)button

Preheat output
terminal

Range button

______________________________________________________________

Product Outline

_____________________________________________________________________

1.2 Interval and Maximum Recording Time

Interval and maximum recording time (when power save
function is valid) are as follows.
Maximum recording time is limited by battery charge
condition. 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 20 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

3

______________________________________________________________

Product Outline

4

_____________________________________________________________________

1.3 Timings of Measurement

When Preheat is OFF

(1) Recording ("

In the recording mode, the unit conducts measurement once
the preset recording interval has elapsed. It then records
the measurement value and updates the LCD indication.
When the power-save function is disabled, or when the
power-save function is active and any button is pressed to
restart the LCD indicator, the unit conducts measurement
every second and updates the LCD indication only, until
the preset recording interval elapses.

Measurement

Indication updated

Recording

LCD

(2) Monitoring ("

In the monitoring mode, the unit conducts measurement
every second and updates the LCD indication.

Measurement

Indication updated

LCD

" on)

REC

①→    ②→    ③→④→⑤→⑥→⑦→⑧→⑨→⑩→

①     ②     ③ ④ ⑤ ⑥ ⑦ ⑧
①     ②     ③     ⑥     ⑨

Display OFF

Measurement (1 s)

Interval

" off)

REC

①→②→③→④→⑤→⑥→⑦→

① ② ③ ④ ⑤ ⑥ 

Display OFF

Display ON

Display ON

Measurement (1 s)

______________________________________________________________

Product Outline

_____________________________________________________________________

When Preheat is ON

5

(1) Recording ("

In the recording mode, the unit first outputs the Preheat
signal once the preset recording interval has elapsed, and
then conducts measurement. It records the measurement
value and updates the LCD indication.

Measurement

                  ②   

Indication updated

Recording

Preheat time

LCD

(2) Monitoring ("

In the monitoring mode, the unit conducts measurement
every second and updates the LCD indication. In this
condition, the unit delivers the Preheat signal permanently.

Measurement

Indication updated

Recording

Preheat time

LCD

" on)

REC

①→      ②→      ③→      ④→

③

①       ②       ③       ④

Display OFF

Preheat time

REC

Display OFF

" off)

①→②→③→④→⑤→⑥→⑦→⑧→⑨→⑩→⑪

①→②→③→④→⑤→⑥→⑦→⑧→⑨→

Measurement (1 s)

Display ON

Measurement (1 s)

Interval

Display ON

NOTE

If the Preheat function is active, the measurement value recorded
in the immediately preceding measurement is displayed in
Recording ("REC" on) until the recording interval elapses,
allowing the following measurement to be conducted. When the
power-save function is active and any button is pressed to
conduct monitoring, quite some time may be required for stable
measurement values to be obtained, depending on the response
time of the connected sensor (time required for the output to
stabilize after the sensor is powered up).

______________________________________________________________

Product Outline

6

_____________________________________________________________________

______________________________________________________________

Product Outline

_____________________________________________________________________

7

Chapter 2

Set Up

2.1 Replacing the Battery

During battery replacement, use caution not to put any

WARNING

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.
Handle and dispose of batteries in accordance with
local regulations.

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.

Installing new batteries ensures about 1 year of recording.
(reference value with interval setting set to 1 minute or
more, preheat is OFF and 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.

______________________________________________________________

Set Up

8

_____________________________________________________________________

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

_____________________________________________________________________

9

2.2 Power Save Function

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

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 20 days.

REC

/ / mark shows

Sleeping......

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

10

_____________________________________________________________________

2.3 Setting Current Time

When replacing 3645-20 VOLTAGE LOGGER batteries or
using 3645-20 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.

______________________________________________________________

Set Up

_____________________________________________________________________

11

2.4 Connecting 9639 CONNECTION CABLE

If the end of the 9639 CONNECTION CABLE short-

WARNING

circuits lines with a voltage between them, this is very
dangerous and can lead to a serious accident.
Exercise great care when measuring voltages.
The maximum input voltage is 60 VDC. Do not
measure voltage in excess of these limitations, as
doing so may damage the unit or cause an accident
that might result in injury or death.

Connect 9639 CONNECTION CABLE to 3645-20.

9639 CONNECTION CABLE

3m

______________________________________________________________

Set Up

12

_____________________________________________________________________

2.5 Preheat Signal

Plug in the 9632 CONNECTION
CABLE.
To do so, insert the cable with the
mark on the connection terminal that
matches the
cable.

Inappropriate insertion of the cable is likely to result in
malfunction of the unit. Particularly following
communication with the COMMUNICATION BASE
connected to the unit, make sure the connection terminal is
not mistakenly lifted.

(1) 9632 CONNECTION CABLE

mark on the connection

GND

Preheat signal

White: Preheat signal
Black: GND

Cable length: 1000 mm

(2) Internal Circuit (Preheat Signal)

FET

Preheat signal

Flow of current

GND

Open-drain output
Rating: 30 V/20 mA max.
(Allowable loss: 200 mW)
GND Ground signal (0 V)

*Open-drain output
The switch (FET), which is inserted between the Preheat
signal and the GND signal, turns on when this signal
becomes active (in Preheat mode).
Make a connection such that the current will flow from the
Preheat signal toward the GND.

______________________________________________________________

Set Up

_____________________________________________________________________

13

(3) Example of a Preheat-Signal Connection Circuit

The Preheat signal controls the sensor power on/off.
Connect the 3645-20 to a sensor, power supply, and relay
in the manner illustrated below.

Counter-electromotive
force protective diode

Confirm that the power supply to be used does not exceed
the ratings (30 V, 20 mA max.) of the Preheat signal.
When selecting a relay, note its ratings (voltages and
currents to be imposed on the coil and the relay contacts)
and the polarity of the coil.
When connecting a relay, be aware that the circuit may be
destroyed by a counter-electromotive force generated when
the relay is turned on/off. To prevent such destruction of
the circuit, always insert a protective diode in the manner
illustrated above.

______________________________________________________________

Set Up

14

_____________________________________________________________________

______________________________________________________________

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

NOTE

3645-20

1. Start recording Vaild Vaild Vaild

2. Stop recording Vaild --- ---

3. Interval setting Vaild Vaild Vaild

4. Preheat time setting Vaild --- Vaild

5. Current time setting --- Vaild Vaild

6. Start control --- Vaild Vaild

7. Recording method
setting

8. Range setting Vaild --- Vaild

9. Comments --- --- Vaild

--- Vaild Vaild

3645-20＋

COMMUNICATION

BASE

3645-20＋

COMMUNICATION

BASE＋PC

The Setup of Preheat Time and Comment is valid only where
the PC, the COMMUNICATION BASE, and the 3645 are
interconnected.

______________________________________________________________

Settings

16

_____________________________________________________________________

1. Start recording

Start manual recording by pressing logger REC/STOP
button for 1 second or initiate by time prescheduled start
set using COMMUNICATION BASE.
When time scheduled start is engaged, "

" icon appears in
display.
When batteries are weak, recording does not start. During
recording, weak battery interrupts recording.

REC

Manual start

During recording

REC

Time prescheduled
start

NOTE

Prescheduled

The "

" icon will dim after recoring begins.

During 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. Setting of Preheat Time

The Preheat time can be set for the 3645 alone or when the
3645, the COMMUNICATION BASE, and a PC are
interconnected. The Preheat time can be chosen from
among eight settings (OFF/0.5 sec/1 sec/2 sec/5 sec/10
sec/30 sec/60 sec).

A Preheat time longer than the recording interval cannot be set.

______________________________________________________________

Settings

_____________________________________________________________________

17

5. Current time setting

To set current time, see COMMUNICATION BASE
instruction manual.

6. Start control

Set specific recording date and time using
COMMUNICATION BASE to engage time scheduled start.
When time scheduled start is engaged, "
display. The "

" icon will dim after recoring begins.

" icon appears in

7. 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.
Endless : Overwrites previously recorded data when data

exceeds 32000.

8. Range setting

The range can be set for the 3645 alone or when the 3645,
the COMMUNICATION BASE, and a PC are
interconnected. Four different measurement ranges, 50
mV/500 mV/5 V/50 V, are available. Select the one best
suited to the voltage to be measured.

9. 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.

______________________________________________________________

Settings

18

_____________________________________________________________________

3.2 Manual Setting

3645-20 VOLTAGE LOGGER stand-alone manual
operation settings are shown below.

(1) Interval setting

Press INTERVAL button to switch measurement value
display to interval setting display. ("
Press SELECT button to designate interval.
Press INTERVAL button to complete setting.

(2) Setting of Preheat Time

Pressing the Range button on the Recording Interval Setup
Screen ("

" displayed) displays and changes the

INTVL

Preheat time (0.5 sec displayed in the illustration).
Pressing the [SELECT] button again returns you to the
Recording Interval Setup Screen.

INTVL

" appears.)

______________________________________________________________

Settings

_____________________________________________________________________

19

The preheat time cannot be defined to be longer than the
recording interval. Conversely, in the setup of the
recording interval, you cannot select a shorter recording
interval than the preheat time that is currently set.
If you choose a longer preheat time than the preset
recording interval and press the [Recording Interval] button
to complete the setup, the preset recording interval will
automatically be rewritten with a longer time than the
preheat time you have just chosen.
When you press the [Recording Interval] button to complete
the setup after setting a preheat time, the system will briefly
display the length of the recording interval that is currently
set. At this time you should verify the settings you have
made.

(3) Range setting

Pressing the Range button on the Monitor screen switches
the measurement range among 50 mV, 500 mV, 5 V, and
50 V.
As the measurement range is changed, the decimal point
will also change position.

50 mV range

5 V range

______________________________________________________________

500 mV range

50 V range

Settings

20

_____________________________________________________________________

(4) Starting and ending recording

Press REC/STOP button for 1 second to clear last recorded
data and start recording. ("

REC

" appears.)
Press REC/STOP 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.

______________________________________________________________

Settings

_____________________________________________________________________

21

3.3 Setting by COMMUNICATION BASE

1. Press logger INTERVAL button lightly to display LCD.

2. When logger LCD shows "
REC/STOP button for more than 1 second to stop
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.

"markor " " icon, press

REC

NOTE

______________________________________________________________

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.

Settings

22

_____________________________________________________________________

3645-20 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 '3645 setting items' to set settings.

NOTE

______________________________________________________________

Settings

Comment, range and preheat Time are only available in 3645
setting items. Personal computer, COMMUNICATION BASE
and 3645-20 must be connected during setting.
Common settings are available to be set in '3911, 3912 setting
items'. This enables 3645-20 and COMMUNICATION BASE
settings.

_____________________________________________________________________

Chapter 4

Specifications

Input DC voltage

23

Maximum input
voltage

Number of input 1ch

Measurement range DC 50 mV/ 500 mV/ 5V/ 50 V

Accracy 0.5% rdg. 5 dgt.

Guaranteed
accuracy period

Effect of radiated
radio-frequency
electromagnetic field

LCD display Measurement value, Interval, Battery status

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

Preheat time OFF/0.5/1/2/5/10/30/60 s

Recording capacity 32000 data

Recording start Manual start, Time prescheduled start

Recording stop Manual stop, Memory full

Recording method One time, Endless

Preheat output Open collector output (30 V, 20 mA MAX.)

Data backup Available (Data not erased by weak batteries or

Interface Infrared optical data transfer

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

Maximum rated power 0.1 VA

60 VDC

Accuracy warranty range: 23 5 (73 9 )
Temperature coefficient: (0.02%rdg. 1.5 dgt.)/

1 year

20 dgt. at 3 V/m

(remaining battery power indicator: 4 phases)
Unit (mV,V), recording (REC), prescheduled ( )

*: The preheat time cannot be defined to be longer

than the recording interval.

battery replacement)

______________________________________________________________

Specifications

24

_____________________________________________________________________

Battery life About 1 year

(temperature at 20 , power save function: valid,
interval: 1 minute, preheat: OFF)
About 140 days
(temperature at 20 , power save function: valid,
interval: 1 minute, preheat: 5 s)
About 20 days
(temperature at 20 , power save function: OFF)

Dimensions Approx. 57W X 86H X 30D mm (excluding projections)

2.24"W X 3.39"H X 1.18"D

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 COMMUNICATION BASE

Standards Applying EMC EN61326

0to40 , 80% RH or less (no condensation)
(32 to 122 )

-10 to 50 , 80% RH or less (no condensation)
(14 to 140 )

9639 CONNECTION CABLE
9632 CONNECTION CABLE
Instruction Manual

Safety EN61010 Measurement category l
(anticipated transient overvoltage 330 V)
Pollution Degree 2

______________________________________________________________

Specifications

_____________________________________________________________________

25

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.
Wipe the LCD gently with a soft, dry cloth.

Service

If the product seems to be malfunctioning, confirm that the
batteries are not discharged, and that the sensor is not open
circuited before contacting your dealer or Hioki
representative.
Pack the product carefully so that it will not be damaged
during shipment, and include a detailed written description
of the problem. Hioki cannot be responsible for damage
that occurs during shipment.

Error Message

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

When this occurs, repair or check the device. Contact your
dealer or Hioki representative.

______________________________________________________________

Maintenance and Service

26

_____________________________________________________________________

______________________________________________________________

Maintenance and Service

HIOKI 3645-20 VOLTAGE LOGGER

Instruction Manual

Publication date: May 2008 Revised edition 6

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 3645A981-06

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]

3645A981-06 08-05H

Printed on recycled paper