Hioki 3638-20 User 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 3
1.3 Measurement Value Recording Modes 5
1.4 Leak Current Measurement 6
1.5 Load current measurement 8
Chapter 2 Set Up 9
2.1 Replacing the Battery 9
2.2 Power Save Function 11
2.3 Setting Current Time 12
2.4 Connecting Sensor Cable 12
Chapter 3 Settings 15
3.1 Setting Items 15
3.2 Manual Setting 20
3.3 Setting by COMMUNICATION BASE 22
Chapter 4 Specifications 25
Chapter 5 Maintenance and Service 27

i
_____________________________________________________________________
Inspection
______________________________________________________________
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.
Introduction
Ins
p
ection
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.
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 X4
(built into this unit, for monitor)
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.

ii
_____________________________________________________________________
Safety Notes
______________________________________________________________
DANGE
R
This instrument 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 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.
Safety Symbols
The symbol printed on the instrument 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 instrument.
Indicates DC (Direct Current).
Safet
y
Notes
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.

iii
_____________________________________________________________________
Safety Notes
______________________________________________________________
DANGE
R
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to
the user.
WARNING
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
instrument.
NOTE Advisory items related to performance or correct
operation of the instrument.
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".
The following symbols in this manual indicate the relative
importance of cautions and warnings.
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.

iv
_____________________________________________________________________
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)
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.

v
_____________________________________________________________________
Notes on Use
______________________________________________________________
DANGE
R
This product cannot be used on following voltage lines.
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
Follow these precautions to ensure safe operation and to
obtain the full benefits of the various functions.

vi
_____________________________________________________________________
Notes on Use
______________________________________________________________
DANGE
R
For model 9658
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
WARNING
To avoid electric shock, do not allow the product to
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.

vii
_____________________________________________________________________
Notes on Use
______________________________________________________________
CAUTION 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.
NOTE Accurate measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high-
current conductors, or in the presence of strong electromagnetic
fields such as near radio transmitters.

viii
_____________________________________________________________________
Measurement Flow Chart and Reference Guide
______________________________________________________________
Is there sufficient
battery charge remaining
to o
p
erate 3638-20?
Replace batteries
Setting current time
Setting 3638-20
stand-alone
・Interval
・Number of
channels
・Recording mode
・Range
Setting 3638-20 with
COMMUNICATION BASE
・Interval
・Current time
・Start control
・Recording method
Setting 3638-20 with
COMMUNICATION BASE and PC
・Interval ・Current time
・Start control ・Range
・Recording method
・Number of channels
・Recording mode
・Alarm ・Comment
See 2.1.
See 3.2.
Connecting sensor See 2.4.
Press REC/STOP
button to start
measurement.
Settin
g
start control
Start control o
p
tions
No
Yes
Quick start
Prescheduled start
Starts measurement
immediately.
Starts measurement at
prescheduled time.
Setting
recordin
g
method
Endless
One time
When recording data
reaches 32000
(16000 in 2 channels),
measurement stops.
When recording data exceeds 32000(16000 in 2 channels), it
overwrites previously recorded data.
Press REC/STOP button to stop measurement.
After measurement is complete, disconnect sensor cables.
Use COMMUNICATION BASE to send measurement data to personal computer.
(See COMMUNICATION BASE instruction manual.)
See 3.2.
Set current time when using 3638-20 for the
first time or re
p
lacin
g
batteries. See 2.3.
Measurement Flow Chart and Reference Guide

1
_____________________________________________________________________
Product Outline
______________________________________________________________
NOTE 3638-20 LEAK LOGGER cannot be set with 3910-20
COMMUNICATION BASE.
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.

2
_____________________________________________________________________
Product Outline
______________________________________________________________
1
2
3
4
6
7
5
8
1. LCD Displays measurement value and settings.
2. Optical data transfer
ports
Enables optical data transfer to
COMMUNICATION BASE.
3. INTERVAL button Calls up interval setting display to set interval,
recording mode and measurement channels.
4. MAX./MIN. button Displays maximum value or minimum value of
recorded data.
5. Clamp connection
terminal
Connects 9657/9658 CLAMP ON LEAK
SENSOR.
6. REC/STOP button Pressing more than 1 second initiates or stops
recording.
(SELECT) button Interval is selected in interval setting display.
7. Alarm output
terminal
Connects 9632 CONNECTION CABLE and
outputs alarm signal (open drain output).
8. 100/1000 mA
button
Changes measurement range from 100/1000
mA.
1.1 Name and Functions of Parts

3
_____________________________________________________________________
Product Outline
______________________________________________________________
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
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*
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.
*: Maximum recording time is limited by battery charge
condition.

4
_____________________________________________________________________
Product Outline
______________________________________________________________
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*
When 3638-20 LEAK LOGGER is used in 1 channel,
maximum recordable data is 32000 per unit.
*: Maximum recording time is limited by battery charge
condition.

5
_____________________________________________________________________
Product Outline
______________________________________________________________
Maximum 135 points partitioned
at com
p
lete c
y
cle
334
µ
s
Interval
1 or 0.2 second interval
Recordin
g
starts Records average/maximum value
Recording maximum value
Effective
value
Average
value Recording
Interval
Effective
value
Maximum
value Recording
Recording average value
Interval
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.
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.

6
_____________________________________________________________________
Product Outline
______________________________________________________________
NOTE When the current to be measured is unknown, begin
measurement with the 1000 mA range selected.
Single-phase 3-lead circuits
Transformer
b
Clamp all three leads
of the circuit
b
a
Ig: leak Current E2
Class 2 grounding line
Load
device
Ig
Three-phase 3-lead
circuits b
Clamp all three leads of the circuit
b
Class 2 grounding line
a
E2
Ig
aE3
Class 3 grounding line
Load
device
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.
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).

7
_____________________________________________________________________
Product Outline
______________________________________________________________
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.
bb′
a
E2
Ig
cc′
A
B
Load
device
Single-phase
3-lead circuits
Load
device
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'.

8
_____________________________________________________________________
Product Outline
______________________________________________________________
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.
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.