Thank you for purchasing the HIOKI "3802 DIGITAL
HiTESTER." 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
3851-10 TEST LEAD (a pair) 1
Protective holster 1
Instruction Manual 1
6F22 manganese battery(built into the instrument) 1
i
Safety
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.
WARNING
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
instrument defects.
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, thesymbol indicates
particularly important information that the
user should read before using the instrument.
Indicates that dangerous voltage may be
present at this terminal.
Indicates a grounding terminal.
Indicates a fuse.
Indicates DC (Direct Current)
Indicates AC (Alternating Current).
Indicates DC (Direct Current) or AC (Alternating
/
Current).
The following symbols in this manual indicate the relative
importance of cautions and warnings.
Indicates that incorrect operation presents
DANGER
an extreme hazard that could result in
serious injury or death to the user.
Indicates that incorrect operation presents a
WARNING
significant hazard that could result in serious
injury or death to the user.
Indicates that incorrect operation presents a
CAUTION
possibility of injury to the user or damage to
the instrument.
This instrument conforms to the safety requirements for CAT
II (1000 V), CAT III (600V) measurement instruments.
To ensure safe operation of measurement instrument, 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 : 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 circui t 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 instrument in an environment
designated with a higher-numbered 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.
Follow these precautions to ensure safe operation and to
obtain the full benefits of the various functions.
DANGER
Always verify the appropriate setting of the
function selector before connecting the test leads.
Disconnect the test leads from the measurement
object before switching the function selector.
Never apply voltage to the test leads when the
Resistance, Continuity or Diode Check, or
Capacitance functions are selected. Doing so may
damage the instrument and result in personal
injury.
To avoid electrical accidents, remove power from
the circuit before measuring.
WARNING
To avoid electric shock, do not allow the
instrument to get wet, and do not use it when your
hands are wet.
Do not attempt to adjust or repair the instrument
with the case open and with voltage being
generated and input. Such adjustments or repairs
should only be made by a technician who fully
understands the dangers involved.
If the instrument is connected to a line that is to be
measured, dangerous voltage levels may be
applied to the terminals, and removing the case
may expose live components. When opening the
case to replace the battery, etc., the test leads
must be detached.
damaged, either remove it from service or mark it
clearly so that others do not use it inadvertently.
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 not designed to be entirely
water- or dust-proof. To avoid damage, do not use
it in a wet or dusty environment.
For safety reasons, when taking measurements,
only use the 3851-10 TEST LEAD provided with the
instrument.
Do not use the instrument near a source of strong
electromagnetic radiation, or near a highly
electrically charged object. These may cause a
malfunction.
v
Preliminary Check
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.
WARNING
Before using the instrument, make sure that the
insulation on the test leads is undamaged and that
no bare conductors are improperly exposed. Using
the product under such conditions could result in
electrocution. Replace the test leads with the
specified Hioki Model 3851-10.
Selects functions, and turns the instrument on and off.
V
/ V
/ mV
/
Ω
/µA
/ mA.A
AC coupling voltage measurement.
DC, AC Voltage measurements.
DC, AC millivolt measurements.
Resistance, Continuity measurements: 400Ω to
40MΩ
Diode measurement.
Capacitance measurement: 4nF to 9999mF
DC, AC Microampere measurements:
400 to 4000mA
DC,AC milliampere and ampere measurements:
40 to 400mA or 4 to 10A.
2.
SHIFT
/ V
/ mV
Ω
/
/µA
/ mA.A
:
Select DC, AC
Select DC, AC
Select Resistance measurement, Continuity check
Select DC, AC
Select DC, AC
This key is used for selecting the measurement of
alternating source or direct source.
Push this key momentarily to step through DC and AC
test.
For Ohm test, push this key momentarily to toggle
ON/OFF.
The beeper will sound continuity when test value below
100 counts (40,000 counts resolution : 1000 counts).
The data hold function allows operator to hold the
displayed digital value while the analog bar graph
continues showing the present readings.
To select
Refresh Hold
by power-on options.
The reading can be updated to the indicator
automatically when the reading is changed. And
simultaneously the beeper sounds a tone to remind
user.
Press this key momentarily to toggle DH on or off.
4.
REL( ZERO)
Relative
The relative function shows the difference between the
measured value and the stored value.
Press to toggle RELative() ON or OFF.
5.
RANGE
:
In auto-range, press this key to select manual range
and turn off the
AUTO
annunciator.
In manual range, press this key momentarily to step up
1 range at one time, press this key for more than 1
second to select auto-range.
In auto-range, the
annunciator is lit and the
AUTO
meter will select an appropriate range for resolution if a
reading is greater than maximum available range,
(overload) will be displayed on the display. The meter
will select a lower range when reading is less than
about 9% of full scale.
OL
DUAL
:
6.
Dual Display Combination
Press this key momentarily to select different
combinations of dual display. The combinations of dual
display are shown following table.
For Volt or Amp test, press this key momentarily to
enter Frequency test and Voltage or Current is
indicated in secondary display.
Press this key more than 1 second to return to Voltage
or Current measurement.
The combinations of dual display are shown in the
following by pushing
Function Primary displaySecondary display
AC
Voltage
DC
Voltage
AC
Current
DC
Current
Frequency(Hz)AC Volt
Frequency(Hz)DC Volt
Frequency(Hz)AC Amps
Frequency(Hz)DC Amps
Hz
key.
8. Display range select:
Press this key for more than 1 second to toggle 4,000
or 40,000 counts resolution.
9.
Ω
V
Terminal
Use this terminal for voltage, resistance and diode
functions.
COM
Terminal
10.
Common terminal for each function. (Please connect
Observe the following precautions to avoid electric
shock.
There insulating clearance around the terminals is
not safe. Be careful when connecting test leads.
The changing of the function switch when
replacing the test terminals requires disconnection
of the test leads from the item being measured and
then the disconnection of the test leads from the
terminals.
7
Preparation for Measurement
The safety caps are attached to the test leads. Remove these
caps before connecting to the instrument.
The maximum input voltage is 1200 VDC, 850
Vrms, or, 10
when setting the function switch to
Attempting to measure voltage in excess of the
maximum input could destroy the instrument and
result in personal injury or death.
To avoid electrical shock, be careful to avoid
shorting live lines with the test leads.
NOTE
6
V Hz. (600 VDC/rms or 10
Correct 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.
6
V Hz
/mV.
)
2.1.1 AC Voltage Measurement
usin
(1) Set the function switch to
(2) Connect the black test lead to
lead to
(3) Touch the test leads to the test points and read the display.
Never apply voltage to the test leads when the
Resistance functions is selected. Doing so may
damage the instrument and result in personal
injury.
To avoid electrical accidents, remove power from
the circuit before measuring.
(1) Set the function switch to
(2) Connect the black test lead to
lead to
Ω
V
terminal.
Ω
.
terminal and red test
COM
(3) Touch the test leads to resistor and read the display.
(4) For manual range selection, press the
mark disappears). To return to auto-ranging
AUTO
operation, press and hold the
RANGE
RANGE
key for more than 1
key (the
second.
(5) In Ohm test, press
key momentarily to toggle
SHIFT
CONTINUITY function ON/OFF. The continuity range is 0-
400.0 Ω Momentarily pushing this key will only turn the
beeper off. While testing continuity, the beeper will sound if
the resistance falls below 10 Ω.
NOTE
When the continuity check function is enabled, a
beep sounds if the resistance corresponds to a
display value of 100 or less in the current range
(or a value of 1000 or less in a 40000 counts
resolution).
In the continuity check function, holding down the
Never apply voltage to the test leads when the
Diode Check functions is selected. Doing so may
damage the instrument and result in personal
injury.
To avoid electrical accidents, remove power from
the circuit before measuring.
A good diode allows current to flow in one direction only.
To test a diode, turn the power off, remove the diode from
the circuit, and proceed as follows:
(1) Set the function switch to
(2) Connect the black test lead to
lead to
Ω
V
terminal.
(3) Touch the red lead to the positive side of the diode and the
black lead to the negative side. The meter can display diode
voltage drops to approximately 2.5 V. A typical voltage drop
is 0.4 to 0.7 V, and the meter will sound a beep to remind
user.
(4) Reverse the test leads and measure the voltage across the
diode again. If the diode is:
Good :OLis displayed.
Shorted : Near 0 V drop is displayed in both directions,
Never apply voltage to the µA.mA.terminal.
Doing so may damage the instrument and result in
personal injury.
WARNING
Be sure to short the capacitor to discharge it
before measuring it if it may charged. Doing so
may damage the instrument and result in personal
injury.
(1) Set the function switch toposition.
(2) Connect the red lead to µ
in
COM
terminal.
A.mA.
(3) Open the test leads, then push
the residual.
(4) Connect the test leads across the capacitor and read the
display.
terminal, and black lead
key momentarily to zero
REL
NOTE
Observe polarity when measuring the polarized
capacitors.
When testing low-capitance devices, noise
introduced into the test leads from the human body
may prevent the measured value from stabilizing.
If this occurs, use the optional 9617 CLIP ON
BASE or the optional 9618 CLIP-TYPE LEAD
and keep hands away from the leads during
measurement.
Do not use the tester to measure current when the
electric potential is 600 V or greater.
The current function overload protection trips at
600 VAC.
To avoid electrical accidents, remove power from
the circuit before measuring.
Do not apply voltage while a current range is
selected. Applying voltage may result in damage to
the instrument, or a serious accident.
2.5.1µA Measurement(400µA,4000µA
(1) Set the function switch to/
(2) Connect the black test lead to
lead to µ
A.mA.
terminal.
µ
.
A
terminal and red test
COM
(3) Touch the test leads to the test points and read the display.
The maximum input current in the 10 A range is
DC 10 A or AC 10 A rms. Never exceed this limit,
as doing so could result in destruction of the
instrument and personal injury or death.
(1) Set the function switch to/
(2) Connect the black test lead to
lead to
terminal.
A
COM
.
mA.A
terminal and red test
(3) Touch the test leads to the test points and read the display.
This multi-meter provides operators with various functions
including:
Dynamic Recording
Data Hold / Refresh Hold
Relative
Analog Bar graph
Auto Power Off and Sleep Mode
Display Value Selection Function
Demonstrate Annunciator of Display
(LCD Display Check Function)
Continuity Function For Ohms Measurement
Combination Display
Communication Function (RS-232C)
Warning Function for Incorrect Current Input Terminal
Connection
Power-on Option
The dynamic recording mode can be used to catch
intermittent turn on or turn off surges, verify performance,
measure while you are away, or take readings while you are
operating the equipment under test and can not watch the
meter.
The average reading is useful for smoothing out unstable or
changing inputs, estimating the percentage of time a circuit
is operated, or verifying circuit performance.
The operational procedures are described below:
(1) Press
HOLD/MAX MIN
dynamic recording. The present value is stored to memories
of maximum, minimum and average.
annunciator will be on.
(2) Press this key for more than 1 second to exit recording
mode.
(3) Press this key momentarily to cycle through maximum,
minimum, average and present readings. The
or
AVG
MAX AVG MIN
indicate which value is being displayed.
(4) The beeper sounds when a new maximum or minimum
value is recorded.
(5) If an overload is recorded the averaging function will stop.
An average value becomes
(6) The secondary digits show the relative stamping time for
MAX, MIN, AVG
for more than 1 second to enter the
MAX AVG MIN
annunciator turns on respectively to
(overload).
OL
reading.
MAX, MIN,
NOTE
In dynamic recording, the auto power off feature is
disabled. and the
will be turned off.
Selecting dynamic recording in auto range, it will
record the value of MAX, MIN or AVG for
different ranges.
The recording speed of dynamic recording is about
100 milli-seconds (0.1 second).
The average value is the true average of all
measured values taken since the recording mode
was entered.
The data hold function allows operators to hold the
displayed digital value, while the analog bar graph continues
showing the present readings. Press
to enter the data hold mode, and the
Press the key again to exit. The present reading is now
shown.
HOLD/MAX MIN
will be displayed.
DH
key
NOTE
The analog bar graph continues showing the
present readings.
3.2.2 Refresh Hold
You can use the power-on option to set the Refresh Hold
when you are working on a difficult measuring field. This
function will freeze measuring value automatically, and
sound a tone to remind user. The operation of push key is
same as the operation of Data hold.
NOTE
If the reading is unstable, the display may not be
updated.
In the voltage, current, and capacitance functions,
when the measured value corresponds to 80 counts
(800 counts in the case of 40000 counts
resolution), the display value is not updated.
In the resistance and diode functions, the display
value is not updated in the overload
when the test leads are open-circuit.
The relative function subtracts a stored value from the
present measurement and displays the result.
(1) Press
sets the display to zero and stores the displayed reading as a
reference value, also
(2) Both auto or manual range can set relative mode. The
relative mode can't be set when an overload has occurred.
(3) Press this key again to exit the relative mode.
(4) In the relative mode, the zero point of bar graph is set to
middle position.
(5) When the Ohm measurement mode is entered, the display
will reads a non zero value due to the presence of test leads.
You can use the relative function to Zero-Adjust the display.
NOTE
key momentarily to set the relative mode. This
REL
will be displayed.
In the case of an overload (OLindication), the
relative function does not operate.
The relative function is ended by changing the
function, pressing the
key, orHzkey, or by powering off the
DUAL
instrument.
SHIFT
key,
RANGE
key,
3.4Analog Bar Graph
The analog bar graph display provides a 21 segments analog
reading representation. The unit of the bar graph is 50
counts/bar (40,000 counts resolution: 500 counts/bar) except
when in the RELative mode. The unit of the bar graph is
100 counts/bar in the RELative mode. For increased
sensitivity, the display of bar graph moves across the scale
four times for each range. The bar returns to 0 (wraps
around) for 1000, 2000, 3000, 4000 counts (40,000 counts
resolution: 10,000, 20,000, 30,000, 40,000 counts).
Push keys are used.
Measurement function is changed.
Dynamic recording is set.
1 ms peak hold is set.
Disable auto power off with power-on option.
(2) In sleep mode, the LCD will display a blinking
To wake-up sleep mode, press any push key for more
than 0.5 sec or rotate function switch.
Without waking up, after 15 minutes, the meter will
automatically shut off completely.
(3) You must turn the function switch to the OFF position, then
turn on again to activate the meter after auto power off.
DISABLE AUTO POWER OFF
When the meter is to be used for long periods of time, the
operator may want to disable the auto power off. Once the
auto power off function is disabled, the meter will stay on
continuously. To shut off the meter by turning the function
switch to the off position.
To activate this function, press and hold the
before switching the meter power on. When all annunciators
are displayed, press any key momentarily to exit
demonstration mode, and the
mode within 15 minutes, if
sleep
annunciator will be off.
SHIFT
signal.
key
NOTE
All settings are reset after returning from sleep
mode or auto power off.
The functions in this section are disabled when
recording function is active.
3.6Display Value Selection
Function
It is possible to select either 4000 or 40000 as the maximum
display value, using either of the following methods.
(1) After powering on the instrument, hold down the display
range select key for more than 1 second. Holding down the
display range select key once more for more than 1 second
returns to the previous display value.
(2) Power on the instrument while holding down the
RANGE
key (power on options). This selects the 40000 display value
setting.
NOTE
When the dual display function is active, this
changes the display value for both the first and
second displays.
When the instrument is powered on in the usual
way (without using the power on options), a
maximum display value of 4000 is selected.
The display value for the capacitance measurement
function does not change (fixed at 4000).
3.7Demonstrate Annunciator
To demonstrate the annunciators, press
on the meter simultaneously. All annunciators will be
displayed. Press any key to exit demonstration mode.
NOTE
This operation cancels the power save function. To
renewable the power save function, power the
instrument off and on again.
In Ohm test, press
CONTINUITY function
ON/OFF. The continuity range is 0-400.0 Ω Momentarily
pushing this key will only turn the beeper on/off.
While testing continuity, the beeper will sound if the
resistance falls below 10 Ω. For other range, the beeper will
sound if the resistance falls below 100 counts (40,000
counts resolution: 1,000 counts).
NOTE
After starting the conductivity check function
based on resistance measurement, even pressing
the
SHIFT
to auto ranging. To set auto ranging, hold down
the
RANGE
In the continuity check function, holding down the
RANGE
ranging, and the
continuity check is carried out. (The beeper does
not sound.)
key for at least 1 second switches to auto
key momentarily to toggle
SHIFT
key to exit the function does not return
key for at least 1 second.
indication appears, but no
3.9Combination Display
The frequency measuring mode helps detect the presence of
harmonic currents in neutral conductors and determines
whether these neutral currents are the result of unbalanced
phases or non-linear loads.
For Voltage or Current test, press
enter Frequency test. Voltage or Current will display on the
secondary display, the frequency will display on the primary
display. This allows simultaneously monitor the current
levels and frequency.
Press
Current measurement.
Please refer to the Chapter 2 of Measurement Procedures,
that will detail for other combination display.
This meter has a communication capability. This function
will assist user to recording and keeping data easy.
We have offer 3852 to optional accessories. The 3852
include a cable with phonic receiver and a software disc.
Please refer following procedures If you want to
communicate with personal computer.
(1) Push and hold the
from off position to any function, wait 1 second, then
release the push key. You will find that the annunciator of
is light on the display.
(2) Fixes one side of cable to the holster of meter and connect
the 9 pin`s terminal of cable to communication port 1 or 2
of personal computer. See the Figure below.
(3) Execute the software to take the data for your necessary
This instrument has a safety function to prevent accidents
when measuring voltages. Under the following conditions,
flashes in the first display and the beeper sounds.
Error
The function switch is set to a position other than/
, and a test lead is connected to the A terminal.
mA.A
NOTE
This function does not operate if the fuse
connected to the A terminal has blown.
3.12Power-on Options
SELECTING POWER-ON OPTIONS
Some options can be selected only when you turn the meter
on.
To select power-on options, press and hold push key while
turning the function switch to any on position. Power-on
options remain selected until the meter is turned off.
SHIFT
Demonstrate Annunciators
To demonstrate the annunciators, The entire annunciators
will be displayed. Press the key again to exit demonstration
mode.
Disable auto-power off
In general, the auto power off function will turn the meter
off if neither function switch nor push key is activated for
15 minutes. When auto power off is disabled, the meter will
stay on continuously.
Auto-power off will be auto disabled in Dynamic Recording.
In general, The meter is 4,000 counts (3 3/4 digits)
resolution and the response time is 3.3 times per second. By
this option, the meter can be changed to 40,000 counts (4
3/4 digits) resolution and the response time can be updated
to one time per second.
DUAL
Set Computer Interface.
Turn on Data output function by RS-232C interface. The
RS232 annunciator will turn lit.