SAFETY RULES
Maximum Overload Protection Input
DESCRIPTION OF PANEL
Protection cover
Test leads store space
Display
Power switch
and
Function switch
Test lead (Black)
for Negative (- )
Select switch
Auto hold
Test lead (Red)
for Positive (+)
DESCRIPTION OF FUNCTIONS
Power Switch and Function Switch
Turn the switch for power on and off and to select the functions
of DCV, ACV,
Ω
, Buz, Diode.
Battery Voltage Drop Indication Display
If the internal battery has been consumed and the voltage drops,
the display shows.
In this case, replace with 2 new batteries.(LR-44 or SR-44).
Auto Hold Function
Press A-HOLD key. (The display shows the symbol)
Connect the test leads to the object under test.
When the reading stabilizes, the buzzer sounds.
Remove the testing leads from the object under test.
The D.M.M now shows the measured value that it retains.
You can repeat steps to as many times as you like as
long as the display shows the symbol.
To cancel this function, press the A-HOLD key once again.
Note:
Do not mistake the following for a malfunction!
•
In DC voltage measurement, the Auto Hold function is only
available for range over 4V.
•
The Auto Hold function cannot be applied to unstable
signals.
MEASUREMENT RANGES
23±5
°
C <80%RH. Accuracy: ± (% r digit)
V
Range Resolution Accuracy
Input
Resistance
Maximum
input
400mV 0.1mV
1.2+2
>100M
Ω
4V 0.001V 0.7+1 11M
Ω
40V 0.01V
400V 0.1V
600V 1V
1.2+1
10M
Ω
600V
V
Range Resolution Accuracy
Input
Resistance
Maximum
input
4V 0.001V
11M
Ω
, <50pF
40V 0.01V
400V 0.1V
600V 1V
2+5
10M
Ω
, <50pF
600Vrms
Resistance
Range Resolution Accuracy
Measuring cur-
rent and Open
voltage
Maximum
input
400
Ω
0.1
Ω
<1mA, <3.4V
4k
Ω
0.001k
Ω
<0.5mA, <1.0V
40k
Ω
0.01k
Ω
<70
µ
A, <0.7V
400k
Ω
0.1k
Ω
1.2+2
<7
µ
A, <0.7V
4M
Ω
0.001M
Ω
2+3
<0.7
µ
A, <0.7V
40M
Ω
0.01M
Ω
5+3 <70nA,
<0.7V
600V
Range Resolution Accuracy
Open-Circuit
Voltage
Maximum
input
400
Ω
0.1
Ω
Beep on
50±20
Ω
<3.4V 600V
Range Resolution Accuracy
Open Circuit
Voltage
Maximum
input
2V 0.01V 1.5+1 <3.4V
600V
GENERAL SPECIFICATIONS
Measuring method
: Dual integration mode
Display
: Counter approx. 4300 counts max.
Range selection
: Auto range
Over indication
: “OL” mark.(Voltage only)
“---” mark. (Others)
Polarity
: Automatic selection (“-” is displayed
only.)
Low battery indication : If the internal battery has been
consumed and the voltage drops, the
display shows mark.
Sampling rate
: Approx. 2 times/sec.
Operating tenperature/ : 0~50°C <80%RH.
Humidity
No
condensation
Storage temperature/ : -10~60°C <70%RH.
Humidity
No
condensation
Power supply
: LR-44
×
2 or SR-44
×
2
Dimension & weight
: 177 (L)
×
76 (W)
×
18 (H) mm
Approx. 110g
Accessories
: Instruction Manual ………………1
LR-44 Button Cell (installed)……2
Compliance with Standards
Safety
EN61010-1
(600V CAT I, 300V CAT II)
EMC
EN61326
EN55022 (Class B)
MEASUREMENT PROCEDURE
DC Voltage (DCV)
DCV Measurement Maximum Rating Input Value
600V DC (CAT. I)
1) Applications.
Measure
D.C.
circuits.
2) Measuring Ranges.
5 ranges from 400mV to 600V.
3) Measurement Procedure.
Set the function switch at V (DCV) range.
Apply the black test pin to the negative potential side of
the circuit to measure and the red test pin to the positive
potential side.
Read the value on the display.
After measurement, remove the red and black test pins
from the circuit measured.
•
The display fluctuates when the test leads are removed.
This is not malfunction.
AC Voltage (ACV)
ACV Measurement Maximum Rating Input Value
600Vrms (CAT. I)
1) Applications.
Measure sine-wave A.C. voltages such as lighting voltages.
2) Measuring Ranges
4 ranges from 4V to 600V.
3) Measurement Procedure
Set the function switch at ACV range.
Apply the red and black test pins to the circuit to
measure.
Read the value on the display.
After measurement, remove the red and black test pins
from the circuit measured.
•
This instrument employs the average measurement
system and some error is made to the display of
waveforms other than sine waves.
•
The accuracy guaranteed frequency range is 45 Hz to 400
Hz.
Resistance Measurement
1) Applications
Resistance of resistors and circuits is measured.
2) Measuring Ranges
6 ranges from 400
Ω
to 40M
Ω
.
3) Measurement Procedure.
Set the function switch of 73101 at OHM.
Apply the red and black test pins to an object to
measure.
Read the value on the display.
After measurement, release the red and black test pins
from the object measured.
•
If measurement is likely to be influenced by noise, shield the
object to measure with negative potential(“-” test lead black).
•
If a test pin is touched by a finger during measurement,
measurement will be influenced by the resistance in the
human body to result in measurement error.
Checking Continuity (
)
1) Applications
Checking the continuity of wiring and selecting wires.
2) How to Use
Set the function switch of 73101 at
.
Apply the red and black test pins to a circuit or
conductor to measure.
The continuity can be judged by whether the buzzer
sounds or not.
After measurement, release the red and black test pins
from the object measured.
•
The buzzer sounds when the resistance in a circuit to
measure is less than about 70
Ω
.
Testing Diode (
)
1) Applications
The quality of diodes tested.
2) How to Use
Set the function switch at
range.
Connect the test leads to the diode to be tested.
When measuring the forward voltage across diode,
a normal diode will indicate 0.5 to 0.7V .
The reverse voltage will indicate “OL”.
For a short-circuited diode, a value near 0V will be
displayed.
AUTO POWER OFF SELECTION
The D.M.M will power off automatically in 20 minutes later
after the last operation was stopped.
The alarm buzzer sounds 7 times before around 1 minute of
power off.
Press any key or turn the switch can postpone the power-off
time or restart the D.M.M is turned off.
To cancel the Auto Power Off Function, hold down the
SELECT key and then set the function switch from OFF to
the position of any desired measurement mode.
The AUTO POWER OFF indication turns off when the
Function is cancelled.
MAINTENANCE
Battery Replacement
(How to Replace)
Remove the battery lid screw with a screwdriver.
Remove the battery cover.
Take out the batteries and replace with 2 new batteries.
Attach the battery lid and screw it on.
YOKOGAWA M&C CORPORATION
International Sales Dept.
2-9-32 Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Phone: 81-422-52-5716 Facsimile: 81-422-55-8654
YOKOGAWA CORPORATION OF AMERICA (U.S.A.)
Phone: 1-770-253-7000 Facsimile: 1-770-251-2088
YOKOGAWA EUROPE B. V. (THE NETHERLANDS)
Phone: 31-334-64-1611 Facsimile: 31-334-64-1610
YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)
Phone: 55-11-5681-2400 Facsimile: 55-11-5681-1274
YOKOGAWA ENGINEERING INSTRUMENTS KOREA CORPORATION (KOREA)
Phone: 82-2-551-0660 to -0664 Facsimile: 82-2-551-0665
YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)
Phone: 61-2-9805-0699 Facsimile: 61-2-9888-1844
YOKOGAWA BLUE STAR LTD. (INDIA)
Phone: 91-80-227-1513 Facsimile: 91-80-227-4270
LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)
Phone: 7-095-737-7868 Facsimile: 7-095-737-7869
KIM3E-2003.2
Function Maximum
rating
input value
Maximum over-
Load protection
input
V (DCV)
DC 600V
V (ACV)
AC 600V
Voltage and current
input prohibited.
DC 600V
AC 600V rms
User’s
Manual
73101
Pocket Digital Multimeter
Please read this instruction manual thoroughly in
order to use this pocket DMM safely. And for
reference, please keep this manual together with the
meter.
Instructions followed the sign “WARNING” must be
obeyed to avoid accidental burn or electric shock.
To avoid damage to instrument or electrical shock!
The maximum input voltage level for 73101 depend
on the over-voltage categories specified by the safely
standards.
These categories are described as below to protect
operators against transient impulse voltages in power
lines.
Over-Voltage
Category (CAT.)
Maximum Input
Voltage
I 600V
II 300V
Over-voltage category I (CAT. I):
Covers the path from a main outlet, through a power
transformer, to a circuit in the transformer’s secondary
stage.
Over-voltage category II (CAT. II):
Covers a primary-stage circuit of equipment
connected to a main outlet.
To make sure that the meter is used safely, the owner
has to follow the instructions while using the
instrument.
1. Pay special attention when measuring the
voltage of AC 30Vrms or DC 60V or more to
avoid injury.
2. Never apply an input signals exceeding the
maximum rating input value.
3. Never use meter for measuring the line
connected with equipment (i.e. motors) that
generates induced or surge voltage since it may
exceed the maximum allowable voltage.
4. Never use meter if the meter or test leads are
damaged or broken.
5. Never use uncased meter.
6. When connecting the test leads, first connect the
ground lead(black). When disconnecting them,
the ground lead must be disconnected last.
7. Always keep your fingers behind the finger
guards on the probe when making
measurement.
8. Be sure to disconnect the test pins from the
circuit when changing the function.
9. Before starting measurement, make sure that the
function is properly set in accordance with the
measurement.
10. Never use meter with wet hands or in a damp
environment.
11. Never open tester case except when replacing
batteries. Do not attempt any alteration of original
specifications.
1. Never apply an input signals exceeding the maximum
rating input value.
2. Be sure to disconnect the test pins from the circuit
when changing the function.
3. Always keep your fingers behind the finger guards on
the probe when making measurement.
Never apply voltage to the input terminals.
Never apply voltage to the input terminals.
Never apply voltage to the input terminals.
1. If the rear case or the battery lid is removed with
input applied to the input terminals, you may get
electric shock. Before starting the work, always
make sure that no input is applied.
2. Before starting the work, be sure to turn OFF the
main unit power and release the test lead from the
circuit.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
IM 73101
1st Edition: 2003. 4
