Introduction i
Inspection i
Safety Notes iii
Notes on Use viii
Chapter 1 Names and Functions of Parts 1
Chapter 2 Measurement 5
2.1 Preparing for Measurement 5
2.2 Insulation Resistance Measurement 6
2.2.1 Measurement Method 9
2.2.2 Reading the Value 10
2.2.3 Measurement Terminal Voltage
Characteristics 11
2.3 Discharging Function 12
2.4 AC Voltage Measurement 13
2.5 Battery Check 15
2.6 Luminous Scales 16
2.7 Options 17
Chapter 3 Specifications 19
3.1 General Specifications 19
3.2 Specifications of Each Unit 21
Chapter 4 Maintenance and Service 27
4.1 Replacing of Batteries 27
4.2 Service 29
4.3 Cleaning 29
Page 42
Page 43
―――――――――――――――――――――――――――
I
I
ntroduction
Thank you for purchasing the HIOKI 3452
MΩ HiTESTER. To obtain maximum
performance from the instrument, please read
this manual first, and keep it handy for
future reference.
nspection
When you receive the instrument, inspect it
carefully to ensure that no damage occurred
during shipping. In particular, check the
accessories, panel switches, and connectors. If
damage is evident, or if it fails to operate
according to the specifications, contact your
dealer or Hioki representative.
Accessories
9292 TEST PROBE (red and black)
9384 CARRYING CASE
Instruction Manual
R6P manganese battery
(built into this instrument)
1
1
1
4
i
――――――――――――――――――――――――
Introduction
Page 44
ii
―――――――――――――――――――――――――――
Using the carrying case
・Opening the cover
Remove the part of the top surface where
"OPEN" is written. Turn the cover you have
removed round to the back, and attach for
use.
・Storaging the Instruction Manual
Can be put under the 3452.
――――――――――――――――――――――――
Inspection
Page 45
―――――――――――――――――――――――――――
S
iii
afety Notes
DANGER
This instrument is designed to comply with 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 instrument
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.
――――――――――――――――――――――――
Safety Notes
Page 46
iv
―――――――――――――――――――――――――――
Safety symbols
・ Thesymbol 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 a double-insulated device.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates that dangerous voltage may be
present at this terminal.
――――――――――――――――――――――――
Safety Notes
Page 47
―――――――――――――――――――――――――――
R
G
N
The following symbols in this manual indicate
the relative importance of cautions and
warnings.
Indicates that incorrect operation
DANGE
presents an extreme hazard that could
result in serious injury or death to the
user.
Indicates that incorrect operation
WARNIN
presents a significant hazard that could
result in serious injury or death to the
user.
Indicates that incorrect operation
CAUTIO
presents a possibility of injury to the
user or damage to the instrument.
Indicates advisory items related to
NOTE
performance or correct operation of the
instrument.
v
――――――――――――――――――――――――
Safety Notes
Page 48
vi
s
l
r
n
d
d
y
)
e
o
e
y
e
―――――――――――――――――――――――――――
Measurement categories (Overvoltage
categories)
This instrument complies with CAT III safety
requirements.
To ensure safe operation of measurement
instruments, 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: Secondaryelectricalcircuit
connected to an AC electrica
outlet through a transformer o
similar device.
CAT II: Primaryelectricalcircuitsi
equipment connected to an AC
electrical outlet by a power cor
(portabletools,househol
appliances, etc.)
CAT III: Primary electrical circuits of heav
equipment(fixedinstallations
connecteddirectlytoth
distribution panel, and feeders from
the distribution panel to outlets.
CAT IV : The circuit from the service drop t
the service entrance, and to th
powermeterandprimar
overcurrentprotectiondevic
(distribution panel).
――――――――――――――――――――――――
Safety Notes
Page 49
―――――――――――――――――――――――――――
vii
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 instrument in an
environment designated with a highernumbered category than that for which the
instrument is rated could result in a severe
accident, and must be carefully avoided.
Never use a CAT I measuring instrument in
CAT II, III, or IV environments.
The measurement categories comply with the
Overvoltage Categories of the IEC60664
Standards.
――――――――――――――――――――――――
Safety Notes
Page 50
viii
N
―――――――――――――――――――――――――――
otes on Use
Follow these precautions to ensure safe
operation and to obtain the full benefits of the
various functions.
Preliminary Checks
Before using the instrument 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.
Before using the instrument, make sure
that the insulation on the test probes is
undamaged and that no bare conductors
are improperly exposed. Using the
instrument in such conditions could cause
an electric shock, so contact your dealer or
Hioki representative for replacements.
(Model 9292 or 9293)
――――――――――――――――――――――――
Notes on Use
Page 51
―――――――――――――――――――――――――――
DANGER
ix
The maximum input voltage and maximum rated
voltage to earth are 150 Vrms (3452-11) and 500
Vrms (3452-12, 3452-13). Exceeding these limits
can damage the instrument or cause a serious
accident.
On the test probe there is a label stating600 V,
however this is only the probe’s maximum rated
voltage, and is not the maximum rated voltage
of 3452.
Before connecting probes to the instrument,
check that the probes are disconnected from the
object to be measured.
Probe 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.
――――――――――――――――――――――――
Notes on Use
Page 52
x
G
―――――――――――――――――――――――――――
WARNIN
Do not allow the instrument to get wet, and do
not take measurements with wet hands. This
may cause an electric shock.
To avoid electric shock when replacing the
batteries, first disconnect the test probes from
the object to be measured. After replacing the
batteries, replace the cover and screws before
using the instrument.
Do not use any other electrical source other
than the batteries. The use of any other sources
may result in damage of the instrument or the
object to be measured and also may cause
electric shock.
――――――――――――――――――――――――
Notes on Use
Page 53
―――――――――――――――――――――――――――
N
CAUTIO
xi
・ If the protective functions of the instrument are
damaged, either remove it from service or mark it
clearly so that others do not use it inadvertently.
・ Calibration and repair of this instrument should be
performed only under the supervision of qualified
technicians knowledgeable about the dangers
involved.
・ Do not store or use the instrument where it could
be exposed to direct sunlight, high temperature or
humidity, or condensation. Under such conditions,
the instrument may be damaged and insulation may
deteriorate so that it no longer meets specifications.
・ This instrument is designed for use indoors. It can
be operated at temperatures between 0
℃ and 40℃
without degrading safety.
・ For safety reasons, only use the 9292 provided with
the instrument or the optional 9293 for
measurement.
・ For safety reasons, use the 9292 or 9293, only
when the 3452 is used.
・ To avoid breaking the probes, do not bend or pull
them.
・ To avoid damage to the instrument, protect it from
physical shock when transporting and handling. Be
especially careful to avoid physical shock from
dropping.
――――――――――――――――――――――――
Notes on Use
Page 54
xii
―――――――――――――――――――――――――――
NOTE
When refreshing the luminous scale outdoors,
keep the meter in the shade.
――――――――――――――――――――――――
Notes on Use
Page 55
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1234567
8
1
1
s
ts
Chapter
Names and Function
of Par
Front Panel
1
MEASURE switch
Press to measure insulation resistance or
check batteries.
――――――――――――――――――――――――
Chapter 1 Names and Functions of Parts
Page 56
2
2345678
―――――――――――――――――――――――――――
Function switch
Select the measurement voltage for insulation
resistance testing or the battery check
function.
Display
This scales are marked with a phosphorescent
paint.
Resistance scale
3452-11: 100/50/25 V
3452-12: 500/250/125 V
3452-13: 1000/500/250 V
AC voltage scale
Battery effective range
Indicator needle
ADJUST (Zero adjuster)
――――――――――――――――――――――――
Chapter 1 Names and Functions of Parts
Page 57
―――――――――――――――――――――――――――
91011
12
9101112
LINE terminal (Line measurement terminal)
Connect the line probe (red).
EARTH terminal (Earth measurement terminal)
Connect the earth probe (black).
3
Fixing screw for the battery cover
Battery cover
――――――――――――――――――――――――
Chapter 1 Names and Functions of Parts
Page 58
4
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――――――――――――――――――――――――
Chapter 1 Names and Functions of Parts
Page 59
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2
nt
2
Chapter
Measureme
.1 Preparing for Measurement
Before use perform the following procedures.
1. Zero adjustment
First turn the MEASURE switch off, then turn
the zero adjuster (ADJUST) with a
screwdriver so that the needle is at the center
of the infinity mark (∞).
2. Battery check
Check that the battery capacity is adequate.
Replace with new batteries if the battery
capacity is low. (Refer to Section 2.5,
"Battery Check" and 4.1, "Replacing of
Batteries."
3. Probe connection
The protection cap are attached to the test
probes. Remove this cap before connecting in
the main unit.
Connect the red line probe to the LINE
terminal and black earth probe to the EARTH
terminal.
5
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Chapter 2 Measurement
Page 60
6
G
2
t
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.2 Insulation Resistance Measuremen
To investigate conduction and the insulation
of the object, the instrument will measure
insulation resistance. In preparing to
measure, there is a need to select the voltage
to be applied to the object to be measured.
WARNIN
Do not attempt to measure insulation resistance
on a live line. Pressing the MEASURE switch or
lifting up it with probe connecting on a live line
may cause damage to the instrument or object
being measured. Before measuring the
insulation resistance, power off the object to be
measured.
To avoid electric shocks do not touch the end of
probes. When measuring insulation resistance
dangerous DC voltage is generated in the
measurement terminals.
――――――――――――――――――――――――
Chapter 2 Measurement
Page 61
―――――――――――――――――――――――――――
G
N
WARNIN
Never touch the object being measured
immediately after measuring. There is a danger
of electric shock from the charge accumulating
during high voltage testing.
Discharge the subject conductor after
measurement. (Refer to Section 2.3, "Discharging
function.")
Before taking a measurement, check the
position of the function switch. Setting the
position incorrectly may cause damage to the
object being measured or any other connected
equipment, since depending on the position of
the function switch, the 3452 may output a high
voltage.
CAUTIO
7
・ Always turn the MEASURE switch off after use.
――――――――――――――――――――――――
Chapter 2 Measurement
Page 62
8
―――――――――――――――――――――――――――
・ Insulation resistance is the ratio of leakage
NOTE
current to applied voltage, and is therefore
unstable. Depending on the circuit being
measured the needle may not stabilize, but
this is not a meter malfunction.
・ While measuring there may be an oscillator
noise from the meter, but this is not a
malfunction.
・ When measuring insulation with respect to
ground, or if the circuit to be measured is
grounded, connect the EARTH probe to the
ground side. This may decrease the
measured value slightly, but is satisfactory
for checking insulation.
・ When the object being measured contains a
capacitance component, the needle may first
indicate a value lower than the actual
resistance value immediately after the
MEASURE switch is pressed. After that the
actual resistance value is indicated.
・ Press the MEASURE switch fully down until a
click is heard. If the switch is not pressed
down fully, the needle will not move from ∞
and a proper measurement cannot be made.
――――――――――――――――――――――――
Chapter 2 Measurement
Page 63
―――――――――――――――――――――――――――
)
)
1
452
3
12345
2
.2.1 Measurement Method
Source
3452-11: 100 V, 50 V, 25 V
3452-12: 500 V, 250 V, 125 V
3452-13: 1000 V, 500 V, 250 V
Always turn off the
breaker of the
measurement line.
Use the function switch to select the
measurement voltage.
Connect the black earth probe to the ground
side.
Connect the red line probe to the line to be
measured.
Press the MEASURE switch. (Lift up the
switch for continuous measurement.)
Read display after needle stabilizes.
(primary
On
Off
Load
(secondary
9
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Chapter 2 Measurement
Page 64
10
2
―――――――――――――――――――――――――――
.2.2 Reading the Value
To read off the resistance value, choose the
one of the outer three scales with the
measurement voltage selected by the function
switch written at each end. (The units are
MΩ.)
Example
When selecting the 100 V range using the
3452-11.
Read
――――――――――――――――――――――――
Chapter 2 Measurement
Page 65
―――――――――――――――――――――――――――
Measurement resistance
0.025 0.05 0.1 1 10 ∞
120
1
0
0
0
0
5
0
]
[V]
100 V
5
25 V
Measurement resistance
0.125 0.25 0.5 1 10 100 ∞
600
5
0
3
0
2
0
1
0
1
5
0
]
[V]
500 V
2
V
125 V
Measurement resistance
1 2 10 100 1000 ∞
1200
1
0
0
0
]
[V]
1000 V
2
11
.2.3 Measurement Terminal Voltage
Characteristics
Measurement terminal
Voltage
0
6
Measurement terminal
Voltage
Measurement terminal
Voltage
5
3
2
0
0
5
5
2
00
0V
[MΩ
50
[MΩ
50
――――――――――――――――――――――――
[MΩ
Chapter 2 Measurement
Page 66
12
2
―――――――――――――――――――――――――――
.3 Discharging Function
When measuring an insulation resistance
that contains a capacitance element, a charge
proportional to the measurement voltage
accumulates, and if undischarged could lead
to an electric shock accident.
After measurement carry out the following
procedure.
1. Without removing the test probes from the
item being measured, turn the MEASURE
switch off.
2. The built-in discharge circuit automatically
discharges the item. (During the discharge,
the needle will return slowly to the infinity
(∞) positions.)
3. The discharge is completed when the needle
reaches the infinity mark. The time required
for discharge depends on the capacitance
value.
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Chapter 2 Measurement
Page 67
―――――――――――――――――――――――――――
2
13
.4 AC Voltage Measurement
The AC voltage of commercial electrical
sources can be measured. Before measuring
the insulation resistance, the instrument can
be used to make sure the object to be
measured is not a live power line.
DANGER
Probe 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.
The maximum input voltage and maximum rated
voltage to earth are 150 V rms (3452-11) and 500
Vrms (3452-12, 3452-13). Exceeding these limits
can damage the instrument or cause a serious
accident.
To avoid electrical shock, be careful to avoid
shorting live lines with the probes.
――――――――――――――――――――――――
Chapter 2 Measurement
Page 68
14
N
)
)
.
1
2
3
123
―――――――――――――――――――――――――――
CAUTIO
Never press the MEASURE button while
measuring voltage. Doing so could damage the
instruments connecting.
Source
(primary
Do not press the
MEASURE button
The AC voltage can be measured in any
setting position of the function switch.
On
Off
Load
(secondary
Connect the black earth probe to the ground.
Connect the red line probe to the line to be
measured.
Read the voltage on the V scale after the
needle stabilizes.
――――――――――――――――――――――――
Chapter 2 Measurement
Page 69
―――――――――――――――――――――――――――
G
2
15
.5 Battery Check
WARNIN
Before taking a measurement, check the position
of the function switch. If the function switch
setting is incorrect, it outputs a voltage for
measuring insulation resistance between
measurement, which may be dangerous.
NOTE
The battery check function places the heaviest
current drain. Check the battery promptly.
1. Remove the probes from the object being
measured. The end of the disconnected may
be short-circuited or open-circuited, but if an
external voltage is applied, an accurate
battery check will not be obtained.
2. Set the function switch to BATT CH.
3. Press theMEASURE switch. (The voltage for
measuring insulation resistance is not generated.)
4. If the needle is within the range indication
(battery effective range), the batteries can be
used. If it is to the right of the indication,
replace the batteries with new ones.
NOTE
Before setting the function switch, if the
MEASURE switch is pressed, the needle may
first swing to the left end of the scale, but it
will indicate an accurate position after about
3 seconds.
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Chapter 2 Measurement
Page 70
16
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)
2
―――――――――――――――――――――――――――
.6 Luminous Scales
CAUTIO
If the instrument is exposed to direct sunlight for a
long time, it may be deformed. When using it
outdoors, as far as possible keep in the shade.
Even if not directed toward the sun, the scale absorbs
heat rapidly.
The 3452 scales are marked with a
phosphorescent paint. Once this is refreshed
by exposure to light, it remains luminous for
a while, allowing measurement in a dark
place.
The following table gives a guideline to the
length of time the scale remains legible in the
dark for different refreshing conditions.
Brightness and exposure
of refreshing light
Average living room lighting
at night (approx. 200 lx, for
5 minutes)
In the office (approx. 1000
lx, for minimum 30 seconds)
Daylight outdoors (approx.
minimum 10,000 lx, for
minimum 30 seconds)
Length of time scale remains
legible in the dark
(at approx. 15 cm from the eye
5 minutes approx.
10 minutes approx.
15 minutes approx.
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Chapter 2 Measurement
Page 71
―――――――――――――――――――――――――――
2
・ The position of the needle remains visible for
NOTE
slightly longer than the scale is legible.
・ When the user moves from a light place to a
dark place, because of the time eyes take to
adjust to the light, the scale may not be
legible immediately.
17
.7 Options
DANGER
To avoid electrical shock, be careful to avoid
shorting live lines with the 9288.
9293 PIN TYPE EARTH PROBE
The black earth probe is a pin type probe like
the line probe. Use it for cases where it is
not possible to clip onto the object being
measured, or for measurement inside a small
cavity.
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Chapter 2 Measurement
Page 72
18
―――――――――――――――――――――――――――
9288 BREAKER PIN
Attach this to the tip of the line probe or pin
type earth probes. It allows the tip to be
extended, when otherwise it would be too
short to make a measurement. (This item
does not conform to IEC 61010.)
――――――――――――――――――――――――
Chapter 2 Measurement
Page 73
―――――――――――――――――――――――――――
O
a
S
a
O
E
E
2nd effective
±10% of reading, plus basic
0MΩ, ∞ scale
0.7% of scale length, plus basic
AC voltage
±5% of maximum scale length,
E
(
t
3
s
3
19
Chapter
Specification
.1 General Specifications
perating temperature
nd humidities
torage temperature
nd humidities
perating
nvironment
ffect of temperature 0 to 18℃,28to40℃
1st effective
measurement range
measurement range
measurement
ffect of position
at ±90 degrees to
he horizontal)
――――――――――――――――――――――――
0to40℃ (32 to 104。F),
90% RH max
(with no condensations)
-20 to 50℃ (-4 to 122。F),
90% RH max
(with no condensations)
Indoors, altitude up to 2000 m
(6562feet)
(32 to 64。F, 82 to 104。F)
±5% of reading, plus basic
allowance
allowance
allowance
plus basic allowance
Variation of needle deflection from
horizontal reading not more than
2% (1.5 mm) of scale length
Chapter 3 Specifications
Page 74
20
R
P
B
M
C
t
v
D
D
D
M
S
a
S
E
―――――――――――――――――――――――――――
esponse timeWithin 3 s (∞→center value, ∞→
ower sourceRated power voltage: 1.5 V DC×4
attery checkIndicated on display
aximum rated power3 VA (when battery check)
ontinuous operating
ime (at center scale
alue measurement)
egree of protectionIP40
ielectric strength5550 Vrms 50/60 Hz for one minute
imensionsApprox. 152W×95H×47D mm
assApprox. 420 g (14.8 oz)
tandards
pplying
――――――――――――――――――――――――
Chapter 3 Specifications
afety
MC
0MΩ) For center value, refer to
the specifications of each
instrument.
When using the 3452-13, 1000 V
range, it may take a little time to
indicate more than 1000 MΩ.
(Voltage fluctuations of 10% from
the rated supply voltage are taken
into account.)
R6P manganese battery×4
3452-11: 30 hours approx. at 100 V
3452-12: 11 hours approx. at 500 V
3452-13: 13 hours approx. at 500 V
9384 CARRYING CASE
Instruction Manual
R6P manganese battery ×4
ptions9293 PIN TYPE EARTH PROBE
9288 BREAKER PIN
21
.2 Specifications of Each Unit
Measurement tolerances are guaranteed at
23±5℃(73±9。F), 90% RH or less, no
condensation, for 1 year.
452-11
ated measurement
oltage (V DC)
aximum effective reading
enter scale reading
(MΩ)
(MΩ)
00
0
.5
――――――――――――――――――――――――
Chapter 3 Specifications
Page 76
22
A
t
0
±5% of scale reading
0
0
0
0
0
0
±10% of scale reading
(
w
a
M
0
0
0
A
M
t
I
1
―――――――――――――――――――――――――――
llowance of resistance measurement
1st effective measuremen
range (MΩ)
2nd effective
measurement range
(MΩ)
.01 - 50.01 - 50.02 - 10
5 - 10,
.005 .01
5 - 10,
.005 .01
10 - 20,
.01 .02
0MΩ, ∞ scale0.7% of 100 V scale length
easurement terminal voltage characteristic
Open-circuit voltage
(when no load is applied)
Lower limit measurement
resistance value to be
maintained rated
measurement voltage (MΩ)
Rated measurement current
(current to be maintained
rated measurement voltage)
Short circuit current1.2 mA max
C voltage measurement
AC voltage scale
(50/60 Hz) and allowance
Input resistance30 kΩ min
aximum rated voltage
o earth
nput error protection for
0 seconds
――――――――――――――――――――――――
Chapter 3 Specifications
When needle centerline is
ithin width of scale markings
t the extreme ends of the scale.)
1 to 1.2 times of rated
measurement voltage (open
circuit terminal voltage)
.025
0 to 150 V, ±5% (=±7.5 V)
of maximum scale value
.05
1 - 1.2 mA
150 V AC
200 V AC
(overvoltage protection)
.1
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―――――――――――――――――――――――――――
3
R
v
1252505
M
20501
C
0.51
2
A
t
0
±5% of scale reading
0
0
0
±10% of scale reading
w
a
M
)
0
0
0
23
452-12
ated measurement
oltage (V DC)
aximum effective reading
enter scale reading
llowance of resistance measurement
1st effective measuremen
range (MΩ)
2nd effective
measurement range
0MΩ, ∞ scale0.7% of 500 V scale length
easurement terminal voltage characteristic
Open-circuit voltage
(when no load is applied)
Lower limit measurement
resistance value to be
maintained rated
measurement voltage (MΩ
Rated measurement current
(current to be maintained
rated measurement voltage)
Short circuit current1.2 mA max
(MΩ)
(MΩ)
.02 - 100.05 - 200.1 - 50
10 - 20,
.01 - 0.02
(MΩ)
(When needle centerline is
ithin width of scale markings
t the extreme ends of the scale.)
.125
20 - 50,
.01 - 0.05
1 to 1.2 times of rated
measurement voltage (open
circuit terminal voltage)
.25
1 - 1.2 mA
00
00
50 - 100,
.05 - 0.1
.5
――――――――――――――――――――――――
Chapter 3 Specifications
Page 78
24
A
M
t
I
1
3
R
v
2505001
M
501002
C
125
A
t
0
2
±5% of scale reading
0
0
1
2
1-2±10% of scale reading
w
a
M
―――――――――――――――――――――――――――
C voltage measurement
AC voltage scale
(50/60 Hz) and allowance
Input resistance90 kΩ min
aximum rated voltage
o earth
nput error protection for
0 seconds
0 to 500 V, ±5%(=±25 V) of
maximum scale value
500 V AC
600 V AC
(overvoltage protection)
452-13
ated measurement
oltage (V DC)
aximum effective reading
enter scale reading
llowance of resistance measurement
1st effective measuremen
range (MΩ)
2nd effective
measurement range
0MΩ, ∞ scale0.7% of 1000 V scale length
easurement terminal voltage characteristic
――――――――――――――――――――――――
Chapter 3 Specifications
(MΩ)
(MΩ)
.05 - 200.1 - 50
20 - 50,
(MΩ)
.01 - 0.05
(When needle centerline is
ithin width of scale markings
t the extreme ends of the scale.)
50 - 100,
.05 - 0.1
000
000
0
- 1000
000 000,
Page 79
―――――――――――――――――――――――――――
0
0.52
1
1
A
M
t
I
1
Open-circuit voltage
(when no load is applied)
Lower limit measurement
resistance value to be
maintained rated
measurement voltage (MΩ)
Rated measurement current
(mA)
(current to be maintained
rated measurement voltage)
Short circuit current (mA)1.2 max1.2 max0.6 max
C voltage measurement
AC voltage scale
(50/60 Hz) and allowance
Input resistance150 kΩ min
aximum rated voltage
o earth
nput error protection for
0 seconds
1 to 1.2 times of rated
measurement voltage (open
circuit terminal voltage)
.25
- 1.2
0 to 500 V, ±5%(=±25 V) of
maximum scale value
(overvoltage protection)
- 1.20.5 - 0.6
500 V AC
1200 V AC
25
――――――――――――――――――――――――
Chapter 3 Specifications
Page 80
26
―――――――――――――――――――――――――――
――――――――――――――――――――――――
Chapter 3 Specifications
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―――――――――――――――――――――――――――
G
4
d
e
4
27
Chapter
Maintenance an
Servic
.1 Replacing of Batteries
WARNIN
To avoid electric shock, turn the MEASURE
button off and disconnect the probe before
replacing the batteries.
After replacing the batteries, replace the cover
and screws before using the instrument.
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.
Handle and dispose of batteries in accordance
with local regulations.
――――――――――――――――――――――――
Chapter 4 Maintenance and Service
Page 82
28
r
―――――――――――――――――――――――――――
NOTE
To avoid corrosion from battery leakage,
remove the batteries from the instrument if it
is to be stored for a long time.
Fixing screw
Battery cove
B
A
3452 Rear View
1. Remove the probes from the instrument.
2. Remove the screw.
3. To remove the battery cover, slide it toward A
as shown in the figure above.
4. Replace all four batteries with new ones.
5. Slide the battery cover toward B to replace it.
6. Fasten the screw.
――――――――――――――――――――――――
Chapter 4 Maintenance and Service
Page 83
―――――――――――――――――――――――――――
N
N
4
4
29
.2 Service
CAUTIO
To clean the instrument, 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.
.3 Cleaning
CAUTIO
If the instrument seems to be malfunctioning, confirm
that the batteries are not discharged, and that the
probes are not open circuited before contacting your
dealer or Hioki representative. When sending the
instrument for repair, pack the instrument 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.
――――――――――――――――――――――――
Chapter 4 Maintenance and Service
Page 84
30
―――――――――――――――――――――――――――
――――――――――――――――――――――――
Chapter 4 Maintenance and Service
Page 85
Page 86
Page 87
HIOKI 3452 MΩ HiTESTER
.
Instruction Manual
Publication date: September 2008 Revised edition 13
Edited and published by HIOKI E.E. CORPORATION
Technical Support Section
All inquiries to Sales and Marketing International
Department
81 Koizumi, Ueda, Nagano, 386-1192, Japan
・ 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.
Page 88
H
EAD OFFICE
8
T
8
E
U
H
6
T
8
1 Koizumi, Ueda, Nagano 386-1192, Japan
EL +81-268-28-0562 / FAX +81-268-28-056