6.3Replacing the Battery and Fuses.............. 53
6.4Checking the Instrument Software Version55
6.5 Displayi ng All On-Scre en Item s...............56
Page 69
1
Introduction
Thank you for purchasing the HIOKI “Model 3804-50 DIGITAL
HiTESTER.” To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future
reference.
Verifying Package Contents
• 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.
• When transporting the instrument, use the original packing
materials in which it was shipped, and pack in a double carton. Damage occurring during transportation is not covered
by warranty.
❏ 6LR61 alkaline battery
(built into the instrument/ 1)
❏ 3851-10 TEST LEAD (1)
❏ Instruction manual (1)
❏ 3804-50 DIGITAL HiTESTER
(with protective holster/1)
Options
3853CARRYING CASE
❏
❏ 3856-01 COMMUNICATION PACKAGE (RS-232C)
❏ 3856-02 COMMUNICATION PACKAGE (USB)
❏ 9617CLIP ON BASE*
❏ 9618CLIP-TYPE LEAD*
(* not complied with the CE marking)
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2
Safety Information
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 ac cidents or injuries not
resulting directl y from instru me nt defects.
Safety Symbols
This manual contains information and warnings essential for
safe operation of the instrument and f or maintaining it in safe
operating condition. Before using it, be sure to carefully read the
following safety precautions.
In the manual, the symbo l indicates particularly
important information that the user should read
before using the instrument.
The symbol printed on the instrument indicates
that the user should r efer to a corres pond ing to pic in
the manual (marked with the symbol) before
using the relevant function.
Indicates that dan gerous voltage may be present at
this terminal.
Indicates a double-insulated device.
Indicates a grounding terminal.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates DC (Direct Cur rent) or AC (Alterna ting Current).
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The following symbols in this manual indicate the relative importance of cautions and warnings.
Indicates that incorrect operation presents
an extreme hazard that could result in serious injury or death to the user.
1
2
Indicates that incorrect operation presents a
significant hazard that could result in serious
injury or death to the user.
Indicates that incorrect operation presents a
possibility of injury to the user or damage to
the instrument.
Indicates advisory items related to performance or correct operation of the instrument.
Other Symbols
Indicates the prohibited action.
*
Indicates the reference.
Indicates that descriptive information is provided below.
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4
Measurement categories (Overvoltage categories)
This instrument complies with CAT II (1000 V) and CAT I II (600
V) 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:Secondary electrical circuits connected to an AC
CAT II:Primary electrical circuits in equipment connected
CAT III:Primary electrical circuits of heavy equipment
CAT IV: The circuit from the service drop to the service
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 ac cident, 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.
electrical outlet through a transformer or similar
device.
to an AC electrical outlet by a power cord (portable
tools, household appliances, etc.)
(fixed installations) connected directly to the distribution panel, and feeders from the distribution
panel to outlets.
entrance, and to the power meter and primary
overcurrent protection device (distribution panel).
Page 73
5
Operating Precautions
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Setting up the Instrument
Operating temperature and humidity:
0 to 40°C (32 ± 122°F), 80%RH or less (non-condensating)
In the event that the temperature exceeds 31°C(88°F), linearly
decrease the humidity to 40°C at 50%rh.
Temperature and humidity range for guaranteed accuracy:
23 ± 5°C (73 ± 9°F), 80% RH or less (non-condensating)
Avoid the following locations that could cause an accident or
damage to the instrument.
Exposed to direct sunlight
Exposed to high temperature
Exposed to liquids
Exposed to high humidity or condensation
Exposed to high levels of particulate dust
In the presence of corrosive or explosive gases
Exposed to strong electromag net ic fields
Near electromagnetic radiators
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Subject to vibratio n
Page 74
6
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 leads is undamaged and that no bare conductors are
improperly exposed. Using the instrument in
such conditions could cause an electric
shock, so conta ct your d ealer or Hioki r epresentative for replacements. (Model 3851-10
TEST LEAD)
Measurement Precautions
Observe the following precautions to avoid
electric sh ock.
• Always verify the appropriate setting of the
function selector before connecting the
test leads.
• Disconnect the test leads from the measurement object and terminals before
switching the function selector.
The terminals are not sufficiently separated.
To avoid electrocution, do not touch the terminals.
For safety reasons, when taking measurements,
only use the test lead provided with the instrument.
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Handling this Instrument
To avoid damage to the instrument, protect it from
physical shock when transporting and handling.
Be especially careful to avoid physical shock from
dropping.
• To avoid corrosion from battery leakage, remove
the batteries from the instrument if it is to be
stored for a long time.
• After use, always turn OFF the power.
Handling the Test Leads
• To avoid breaking the cables, do not bend or pull
them.
• The ends of the leads are sharp. Be careful to
avoid injury. Fit the protective pin cap when the
product is not in use.
• Keep the cables well away from heat sources,
as bare conductors could be exposed if the
insulation melts.
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Page 77
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1.1 Product Overview/ Features
OverviewChapter 1
1.1 Product Overview/ Features
The 3804-50 is a multifunction, high-performance digital multimeter that
can be used for voltage (DC/AC), curr ent (DC /AC), resi stance, continu ity,
diodes, and elect rostatic capacity measurement. Fur the rm ore , th i s instrument can be contr olled by computer and t ransfer measurement data to
the computer when the optional 3856-01/02 is used.
High-performance Handheld DMM
The 3804-50 can display a maximum count of 9999. The basic
accuracy for DC voltage measurement is ±0.09% rdg. ±2 dgt.
Safe Design Compliant with CE Marking Standards
The 3804-50 is compliant with international safety standards
(IEC61010-1 measu remen t catego ries CAT II (1000 V) and CAT III
(600 V)) and EMC related standards.
Comprehensive Additional Functions
The 3804-50 is also equ ipped with a wealth of add itional fun ctions
ranging from simple support for measurement to easy analysis.
❖See Chapter 3 Additional Functions (page 27)
Refresh Hold
Function
Recording
Function
4-20 mA (0-20 mA)
Percentage D isplay
Function
Relative Display
Function
Communications
Function
The measured value is locked automatically and
then stored, even if you let go of the test leads.
Switches the display to maximum measured value,
minimum value, average value, or current value.
Displays 4-20 mA (0-20 mA) instrumentation signal converted into a percentage of 0-100%.
Displays the deviation from the reference value.
Permits connection to a computer for data analy-
sis. (Requires RS-232C/USB and the optional
3856-01/02.)
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1.2 Names and Functions of Parts
10
1.2 Names and Functions of Parts
The name and function of each part of the 3804-50 is described
below.
Front Panel
Display
(11 page)
Operation Keys
(12 page)
Function Selector
(12 page)
µA. mA terminal
Terminal used for current measurement
(999.9 mA or less).
Connect the red test
lead.
V..Ω. . terminal
Terminal used for voltage
measurement, diode check,
resistance measurement,
and capacitance measurement.
Connect the red test lead.
COM terminal
Common terminal
used for all measurements.
Connect the black
test lead.
A terminal
Terminal used for current
measurement (9.99 A or
less).
Connect the red test lead.
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11
Display
HOLD
1.2 Names and Functions of Parts
Main display
and units
Bar graph
APSLights when the auto power save function is ON.
RELLights when the relative value display function is ON.
Lights when the recording function is ON.
Lights when the maximum value is being displayed.
MAX
(Recording function)
Lights when the minimum value is being displayed.
MIN
(Recording function)
MAX-MIN
Lights when the maximum value - minimum value is being displayed. (Recording function)
Lights when the average value is being displayed.
AVG
(Recording function)
Lights when the diode check function is being used.
Lights when the continuity check function is being used.
Low battery indicator. This lights when the battery needs to be
replaced.
Lights when the harmonics percentage display function is ON.
AUTO Lights when the auto range function is being used.
Lights when the DCV measurement or DCA measurement
function is being used.
Lights when the ACV measurement or ACA measurement
function is being used.
Lights when the manual/trigger hold function is ON.
Lights when transmissions are being controlled.
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1.2 Names and Functions of Parts
12
Function Selector
OFFPressing this key turns the instrument off.
Voltage measurement functi on
SHIFT key to select DC or AC.
Use the
Diode check function
Resistance measurement function
Use the
SHIFT key to select either continuity check.
Capacitan ce meas urem ent f uncti on. Us e the
select the temperature measurement function.
Current measurement function up to 9999
Use the SHIFT key to select DC or AC.
Current measurement function up to 999.9 mA.
SHIFT key to select DC or AC.
Use the
Current measurement function up to 9.99 A.
Use the
OFFPressing this key turns the instrument off.
SHIFT key to select DC or AC.
Operation Keys
HOLD function.
Holding this key toggles
the recording function
ON/OFF.
SHIFT key to
μA.
Switches range.
SHIFT key, Switches
measurement functions
(displayed in blue characters on the unit).
Relative value function. Holding this key toggles the backlight ON/OFF.
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Holster
1.2 Names and Functions of Parts
Connector
Test Lead Holder
Stand
Connector This connector is for the optional communications cable. If
T est Lead
This instrument includes the holster as standard equipment.
Because the holster is made of a soft material, it will absorb
external shocks and protect the instrument.
Remove the instrument from the holster before attempting to
change the battery or the fuse. After replacing the battery or
fuse, be sure to return the instrument to the holster before starting to use the instrument again.
you remove instrument from the holster, this connector will
also be detached. Be careful not to lose the connector.
These lock the test leads in place. You can lock one test
Holder
lead in place and then carry the instrument around while taking measurements.
StandPull out the stand in order to set the instrument down in a
standing position.
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1.2 Names and Functions of Parts
14
Rear Panel
Do not apply heavy downward pressure with t he
stand extended. The stand could be damaged.
Communications
Port
Screw
Page 83
15
MeasurementChapter 2
Observe the following precautions to avoid
electric shock.
• Always verify the appropriate setting of the
function selector before connecting the
test leads.
• Disconnect the test leads from the mea-
surement object before switching the function selector.
• The maximum input voltage is 1000 VDC,
1000 V or 2 ×10
sure voltage in excess of the maximum
input could destroy the instrument and
result in personal injury or death.
• The maximum input current is as follows;
A terminal: Continuous up to 10 A AC/DC.
µA.mA terminal: 1 A AC/DC
Never exceed this limit, as doing so could
result in destruction of the instrument and
personal injury or death.
• The maximum rated voltage between input
terminals and the ground is as follows;
CAT II : 1000 VDC, 1000 VAC
CAT III: 600 VDC, 600 VAC
Attempting to measure voltages exceeding
this level with respect to ground could
damage the instrument and result in personal injury.
• To avoid electrical shock, be careful to
avoid shorting live lines with the test leads.
• For safety, test lead connections must
always be made at the secondar y side of a
circuit breaker.
7
VHz. Attempting to mea-
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2.1 Pre-Operation Inspection
16
s
t
n
o
e
To avoid electrocution, do not touch the terminals.
For safety reasons, when taking measurements,
only use the test lead provided with the instrument.
In order to protect the tip
of the test leads, the tes
leads are capped whe
the unit is shipped from
the factory. Be sure t
remove the caps befor
using the test leads.
2.1 Pre-Operation Inspection
Operation Check
If the operation check reveals any abnormalities,
stop the check immediately and do not use the
instrument.
Required equipment:
• Model 3804-50 (this instrument)
• Model 3851-10 TEST LEAD
• AC power receptacle
(100 V AC 50 Hz/60Hz commercial power supply)
1. Set the function switch to "Ω".
2. Press the SHIFT key to conduct the continuity
check. ( lights.)
❖ (23 page)
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17
2.1 Pre-Operation Inspection
y
or
B
3. Connect the red test lead to the V terminal, and
the black test lead to the COM terminal.
Red
2
1
Black
3
4. Short the tips of the red and black test leads by
touching them together
.
• Buzzer sounds.
• Value stabilizes around
0 Ω.
→ OK
OL displayed/ The displa
•
is unstable→NO
• Possible test leads
tester malfunction.
5. Set the function switch to "V". Press the SHIFT key
to conduct the ACV. ( lights.)
6. Insert the test lead tips into the openings of the AC
receptacle.
4
5
6
7
8
9
10
lack
Red
• Display of commercial voltage levels→OK
• No display of commercial voltage levels
Possible tester malfunction.
→ NO
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Page 86
2.1 Pre-Operation Inspection
18
This procedure only partially confirms the operation of this instrument. Periodic calibration is necessary in order to ensure that this instrument
operates according to its product specifications.
7. (Confirming blown fuse for mA, mA terminal)
Set the function switch to "Diode Check ()".
Connect the red test lead to the µA, mA terminal,
and the black test lead to the V t erm inal. S hort the
tips of the red and black test leads by touching
them together.
• Approximately 1.6 V displayed→ OK
• OL displayed→NO
Fuse may be blown.
Please replace fuse.
❖ (53 page)
8. (Confirming blown fuse for A terminal)
Connect the red test lead to the A terminal, and
the black test lead to the V terminal. Short the tips
of the red and black test leads by touching them
together.
• Buzzer sounds→ OK
• OL displayed→NO
Fuse may be blown.
Please replace fuse.
❖ (53 page)
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2.2 Voltage Measurement
1.
t
)
2.2 Voltage Measurement
• Note that the instrument may be damaged if
voltage or current the measurement range.
• When the power is turned off, do not apply voltage or current to the measurement terminal.
Doing so may damage the instrument.
AC
DC
<Example>
When ACV is selected
Red
Black
Set the function switch.
2. Use the SHIFT key to selec
either DC or AC.
(DC)
(AC
3. To set manual range, press
the RANGE key . (Auto range
is the normal setting.)
❖(28 page)
4. Connect the test leads to
the test terminals.
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2.3 Current Measurement
20
5.
o
<Example>
ACV Measurement
Black
Red
DCV Measurement
Black
<Example>
When measuring AC
Red
Connect the test leads t
the object being tested.
6. Read the value displayed.
2.3 Current Measurement
Never apply voltage to the test leads. Doing
so may damage the instrument and result in
personal injury. To avoid electrical accidents,
remove power from the circuit before measuring.
• Note that the instrument may be damaged if
voltage or current the measurement range.
• When the power is turned off, do not apply voltage or current to the measurement terminal.
Doing so may damage the instrument.
Page 89
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1.
t
s
-
o
o
ll
y
)
AC
<Example>
When ACA is selected
2.3 Current Measurement
Set the function switch.
μA: For measuring volt-
ages below 9999 μA
mA : For measuring volt-
ages below 999.9 mA
A: For measuring volt-
DC
ages below 9.99 A
If you are not sure of the voltage
to be measured, set the function
switch to "A".
2. Use the SHIFT key to selec
either DC or AC.
(DC)
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2
3
4
(AC
Red
(AUTO off)
Black
3. To set manual range, pres
the RANGE key.
(Auto range is the normal set
ting.)
❖ (28 page)
4. Connect the test leads t
the test terminals.
5. Connect the test leads t
the object being tested.
6. Read the value displayed.
Holding the SHIFT key when
using the mA function wi
switch to the percentage displa
(4-20 mA / 0-20 mA).
This function can be used to
check industrial meters.
❖ (33 page)
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Page 90
2.4 Resistance Measurement
22
1.
s
t-
o
o
2.4 Resistance Measurement
Never apply voltage to the test leads. Doing so
may damage the instrument and result in personal injury. To avoid electrical accidents,
remove power from the circuit before measuring.
Set the function switch.
Red
Black
<Example>
Black
(AUTO off)
2. To set manual range, pres
the RANGE key.
(Auto range is the normal se
ting.)
❖ (28 page)
3. Connect the test leads t
the test terminals.
4. Connect the test leads t
Red
the object being tested.
5. Read the value displayed.
• Relative (REL) display function can be used to
zero adjust.
❖ (32 page)
• Please note that resistance measurement for
coiled conductors (inductors) with impedance
more than 10H (henry) may not be poss ible due
to inductive load.
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2.5 Continuity Check
1.
h
e
E
is
d
o
o
r
s
e
-
h
,
2.5 Continuity Check
( lights)
Red
Black
<Example>
Black
Never apply voltage to the test leads. Doing
so may damage the instrument and result in
personal injury. To avoid electrical accidents,
remove power from the circuit before measuring.
Set the function switch.
(AUTO off)
Red
2. Select continuity () wit
the SHIFT key.
3. If you want to change th
range, press the RANG
key.
(Normally, manual range
used.)
To change to auto range, hol
the RANGE key down.
❖ (28 page)
4. Connect the test leads t
the test terminals.
5. Connect the test leads t
the object being tested.
6. Read the value displayed.
In each range, the buzze
sounds when the count is les
than 100 (less than 10.0 Ω in th
999.9 Ω range).
However, in relative value dis
play mode, this conforms wit
the internally measured value
not the display value.
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2.6 Diode Check
24
1.
o
o
e
o
s
o
-
e
-
h
,
2.6 Diode Check
Never apply voltage to the test leads. Doing
so may damage the instrument and result in
personal injury. To avoid electrical accidents,
remove power from the circuit before measuring.
Red
Black
<Example>
Cathode
Black
Anode
Sequential order
Red
Set the function switch.
2. Connect the test leads t
the test terminals.
3. Connect the test leads t
the object being tested.
4. Read the value displayed.
With a normal diode, th
sequential orde r voltage (0.3 t
0.8 V) is displayed.
When the display value les
than 0.050 V, buzzer sounds.
When the displa y va lue dr ops t
the range of 0.3 to 0.8 V, a sin
gle buzzer sounds to indicat
that a diode was detected.
However, in relative value dis
play mode, this conforms wit
the internally measured value
not the display value.
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2.7 Capacitance Measurement
1.
e
E
s
o
o
-
e
-
-
e
s
-
2.7 Capacitance Measurement
Red
Black
<Example>
Never apply voltage to the test leads. Doing
so may damage the instrument and result in
personal injury. To avoid electrical accidents,
remove power from the circuit before measuring.
Set the function switch.
(AUTO off)
2. If you want to change th
range, press the RANG
key.
(Normally, manual range i
used.)
❖ (28 page)
3. Connect the test leads t
the test terminals.
4. Connect the test leads t
the object being tested.
5. Read the value displayed.
This instrument measures capac
itance by the charge-discharg
method. This instrument mea
sures capacitance by the cha rg e
discharge method. Due to charg
ing times, the 9.999 mF rang
can take several tens o f seco nd
before the measured value is dis
played.
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2.7 Capacitance Measurement
26
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27
3.1 Auto Range Function
Additional Functions Chapter 3
3.1 Auto Range Function
The auto range function automatically selects the optimal range
for measurement. Use this function when you do not know the
strength of the input signal or if you wish to avoid having to set
the range manually.
Auto range is set automatically as soon as the power is turned
on in all functions, except for the continuity check function.
("AUTO" lights on the screen.)
AUTO ON
1
2
3
4
5
6
Threshold Values
RangeUpDownFull Scale
9999 rangeExceeds 9999 Below 9009999
9.99 A range----999
2.100 V range---- 2100
• When using the continuity check function, manual range is the initial setting.
• Auto range is not available for diode check and A
function.
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3.2 Manual Range Function
28
3.2 Manual Range Function
Press the RANGE key to set the manual range function. Each
time the key is pressed the range increases, and the position of
the decimal point changes. Use this function when you know the
strength of the input signal.
To change to auto range, hold down the RANGE key.
AUTO OFF
• When using the continuity check function, manual range is the initial setting. When using except
for the continuity check function, Auto range is
the initial setting.
• Auto range is not available for diode check A
function.
3.3 Hold Functions
3.3.1 Trigger Hold Function
Fix a measurement value for the trigger hold function before
pressing the REC/HOLD key.
1. Turn the refresh hold function off.
❖ (40 page)
2. Press the REC/HOLD key during me asurement to
lock the displayed value.
3. To update and lock the displayed value again,
press the REC/HOLD key again.
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HOLD lights
HOLD
HOLD flashes
→
Lights
3.3 Hold Functions
1
2
To cancel the trigger hold function, press and hold
the REC/HOLD key.
The bar graph conforms with the displayed hold
value.
3.3.2 Refresh Hold Function
The refresh hold function locks the display value automatically
once the measurement value stabilizes. As the display value
remains locked even if you remove the test leads from the test
subject, this function is useful when you are measuring in locations where it is difficult to see the display value or when you are
using both hands to take measurements.
1.
Set the threshold val ue (the amount of change once
the display has stabilized) of the refresh hold function.
❖ (40 page)
2. Press the REC/HOLD key to set the instrument to
wait for the trigger.
3. Connect the test lead to the test subject. Once the
display value stabilizes, "" lights, a buzzer
sounds and the display is locked.
HOLD flashing
Wait for the trigger
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3.4 Recording Function
30
HOLD
4. After confirming that the buzzer has sounded,
remove the test lead from the test subject.
The display value remains locked, "" flashes
and the instrument waits for the next trigger.
To cancel refresh hold mode, hold down the REC/
HOLD key.
• The bar graph conforms with input signal.
• If the display value does not exceed the threshold value* that was set, the display value is not
locked in. If you have trouble getting the display
value to lock, try changing the threshold value.
* The threshold value of each function is shown below
FunctionThreshold value
DCV/DCμA/DCmA
ACV/ACμA/ACmA500 counts for each range.
DCA0.1 A
ACA0.5 A
ΩOL
100 counts for each range.
3.4 Recording Function
This function records the maximum, m inimum, maximum-minimum and average value of the input signal starting from the time
when the recording function was started.
Input signal current value: REC
Input signal maximum value : REC MAX
Input signal minimum value : REC MIN
Input signal maximum value-minimum value
Input signal average value: REC AVG
: REC MAX-MIN
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3.4 Recording Function
1. To turn on the recording function, hold down the
REC/HOLD key while measurement is in pr ogress.
REC lights
Displays the
current value.
1
2
3
2. Press the R EC/HOLD key again to toggle between
the maximum value, minimum value, average
value, current value and the display.
MAX lights
Maximum
value display
When the maximum value (or m inimum value) is
updated, the buzzer sounds.
MAX
MIN
MAX-MIN
AVG
Current value
3. To cancel the recording function, hold down the
REC/HOLD key.
• The recording function records the maximum
value, minimum value, and average value of the
internal measurement data prior to smoothing,
not the displayed values.
• The auto power save function is disabled automatically when you use the recording function.
• Bar graph shows the current value.
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索引
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3.5 Relative (REL) Display Function
32
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3.5 Relative (REL) Display Function
Pressing the REL key causes future values to be displayed relative to the currently displayed value, which becomes the reference value.
To reproduce a zero adjust function while measuring voltage
(mV), resistance, etc., short the test leads to set the relative
value display mode. (This cancels the Seebec k effect and the
effect of wiring resistance.)
1. Display the measured value that you want to set
as the reference value.
2. Pressing the REL ke y sets the currently displayed
value as the reference value, and displays future
values as relative values to that reference value.
Relative Value - Measured Value - Reference Valu
• The bar graph conforms with the displayed relative.
•While OL is displayed, the Relative (REL) func-
tion is disabled.
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