Lutron Electronics DM-9131 Operation Manual

CAT III 1000V, true rms, L/C/R

AUTOMOTIVE
TESTER

Model : DM-9131

Your purchase of this
AUTOMOTIVE TEST
marks a step forward
for you into the field of

precision measurement.

Although this
Automotive test is a
complex and delicate
instrument, its durable
structure will allow
many years of use if
proper operating
techniques are
developed. Please read

the following

instructions carefully
and always keep this

manual within easy

reach.

OPERATION MANUAL

TABLE OF CONTENTS

1.

FEATURES....................................................................................................

1

2.

SPECIFICATIONS...................................................................................

2

2-1 General Specifications...........................................................................

2

2-2 Electrical Specifications..........................................................................

3

3.

FRONT PANEL DESCRIPTION...................................................................

7

4. PRECAUTIONS & PREPARATIONS FOR

MEASUREMENT..........................................................................................

8

5.

MEASURING PROCEDURE..........................................................................

9

5-1 Symbols & Units of Display ...................................................................

9

5-2 DC voltage, AC voltage true rms Measurement ...........................

10

5-3 Resistance Measurement.........................................................................

10

5-4 DC current, AC current true rms Measurement ..................................

11

5-5 Continuity Check ...................................................................................

12

5-6 Diode Test ..............................................................................................

12

5-7 Capacitance Measurement.......................................................................

14

5-8 Inductance Measurement.........................................................................

14

5-9 L/C Calibration........................................................................................

15

5-10 Frequency Measurement.......................................................................

15

5-11 Temperature Measurement....................................................................

16

5-12 Tach. Measurement …………………………………………………………

16

5-13 "DWELL ANGLE" Measurement 17

5-14 Point check…………………………………………………………………..

19

5-15 Optional Adapter…………………………………………………………

19

5-16 Relative Measurement...........................................................................

20

5-17 Data Hold Operation..............................................................................

20

5-18 LCD Backlight ON/OFF........................................................................

20

5-19 Max/Min. value record...........................................................................

21

5-20 RS232 Computer Interface.......................................................................

21

6.

ADVANCED SETTING.................................................................................

23

8-3 Set Auto power OFF management..................................................................

24

8-4 Set beeper sound ON/OFF..................................................................

25

8-6 Set clock time(Year/Month/Date,Hour/Minute/Second)............................

26

8-7 Set Change the Temp.

℃, ℉

unit...........................................................

26

7.

MAINTENANCE...........................................................................................

26

7-1 Replacement of Battery...........................................................................

26

7-2 Cleaning...................................................................................................

26

7-3 Replacement of Fuse...............................................................................

27

8.

OPTIONAL ACCESSORIES & ADAPTERS .................................................

28

9.

THE ADDRESS OF AFTER SERVICE CENTER..........................................

29

1. FEATURES

* Meet IEC 1010 CAT III 1000 V safety requirement.
* LCD with green light backligh, easy reading.
* 6000 counts A/D, high resolution.
* Multi function measurement. DCV, ACV, DCA, ACA,

Resistance, Capacitance, Inductance, Frequency,
Temperature, Diode, Continuity beeper, TACH,

DWELL, POINT, 2000A Clamp
* Max. & Min. measurement value with recall.
* Relative, Data hold.

*

Auto range with manual range selection.

*

Temperature measurement posibility.

*

V/A/Hz button, when execute the ACV, ACA function also

can measure the frequency of signal.

*

Both 10 A, 6A current are build fuse for safety

consideration.
* 10 M ohm impedance for voltage circuit.
* Operates from 9 V ( 006P, MIN1604 ) batteries.
* Built-in overload protection for most ranges.
* Photo couple RS 232 computer serial interface.
* Uses durable, long-lasting components, enclosed in

strong, light weight ABS-plastic housing.
* Full line optional adapters : Clamp adapter,

Tachometer adapter, Pressure adapter, Humidity

Adapter, Sound level adapter, Anemometer adapter,

Light adapter, EMF adapter.

1

2. SPECIFICATIONS

2-1 General Specifications

Display 60 mm x 39 mm large LCD display
Measurement DCV, ACV, DCA, ACA, Resistance,Diode,

Continuity beeper,Capacitance,

Inductance, Frequency, Temperature.
A/D counts no. 6000 counts.
Range selection Auto range with manual range selecting.

Special function Relative measurement

Data hold

To freeze the display reading on the

LCD display.

Power On/Off Auto power of or manual power off.
management @ Details please refer page 7
Memory recall Records Maximum & Minimum readings

with recall.
Relative To offset the measurement value.

measurement

V/A/Hz button

When execute the voltage or current

function also can measure the frequency

of signal.

Data output RS 232 PC serial interface, photo couple.
Polarity Automatic Switching, " - " indicates

negative polarity.
Zero adjustment Automatic.
Sampling time Approx. 0.5 to 1 second.
Operating

0 ℃ to 50 ℃ (32 ℉ to 122 ℉),
Temp. & humidity Max. 80% RH.
Power supply 9 V ( 006P, MIN1604 )

DC 9V adapter input

*AC/DC Power adapter is optional.
Power consumption Approx. DC 7.0 mA.
Weight 378 g/0.83 LB ( w.o battery ).
Dimension 190 x 88 x 40 mm ( 7.5 x 3.5 x 1.6 inch ).

2

Accessories

Red and Black Test Leads…………………

1 Set

Included

Instruction Manual.....................................

1 PC
Optional Full line adapters :
accessories ACA/DCA current adapter,

Tachometer adapter,
Humidity adapter, Pressure adapter,
Light adapter, EMF adapter,
Sound level adapter,

High voltage probe.
AC to DC 9V Adaptre…………………... AP-9VA
Holster……………………………………... HS-03

Type K Temperature probe.....................

TP-11

Soft carryinfg case....................................

CA-05A

RS232 cable to D-Sub 9 connector..............................................

UPCB-06

RS232 cable to USB connector........................

UPCB-11
RPM inductive pick up sensor………….. IP-09
Data Acquisition software……….. SW-U801-WIN
SW-E802

2-2 Electrical Specifications (23±5

℃℃℃℃

)

DC Voltage

Range 600.0 mV /6 V/60 V/600 V /1000 V
Resolution 0.1 mV /0.001V /0.01V /0.1V/1 V
Accuracy ± ( 0.5% + 2d ) 600 mV

± ( 0.8% + 1d ) 6 V, 60 V, 600 V, 1000 V

Input impedance 10 M ohm.
Over load 600 mV range ± 380 DCV, 380 ACV
protection other ranges ±1000 DCV, 1000 ACV

AC Voltage ( True RMS )

Range 600.0 mV /6 V/60 V/600 V /1000 V
Resolution 0.1 mV /0.001V /0.01V /0.1V/1 V
Accuracy ± ( 1% + 2d )

* Spec. are tested under 50/60 Hz.

Input impedance 10 M ohm.
Over load 600 mV range ± 380 DCV, 380 ACV
protection other ranges ±1000 DCV, 1000 ACV

3

DC Current, AC Current ( True RMS )

DC Current, AC Current ( True RMS )DC Current, AC Current ( True RMS )

DC Current, AC Current ( True RMS )

Range 10 A / 6 A
Resolution 0.01 A / 0.001A

Accuracy DCA ACA

6 A ± (1.5%+2d) ± (1.5%+2d)
10 A ± ( 1.5 % + 2d ) ± ( 1.5 % + 2d )

* ACA spec. are tested under 50/60 Hz.

Over load 10A fuse.
protection

Diode ( Forward voltage, VF )

Diode ( Forward voltage, VF )Diode ( Forward voltage, VF )

Diode ( Forward voltage, VF )

Range 2.9 V DC.
Accuracy ± ( 0.5% + 2d )

Capacitance

CapacitanceCapacitance

Capacitance

Auto Range 600 pF/6 nF/60 nF/600 nF/6 uF/60 uF/100 uF/600 uF
Resolution

0.1 pF/0.001 nF/0.01nF/0.1 nF/0.001 uF/0.01 uF/0.1 uF/1uF

600 pF ±( 2.5% + 5d )

Accuracy 6 nF/60 nF/600 nF/6 uF/60 uF ±( 1.5% + 5d )

100uF/600 uF ±( 2.5% + 5d )

Test frequency

100Hz /1KHz /10KHz (Auto frequency configuration)

Remark Discharge capacitor before testing.

Over load protection

±30 DCV, 30 ACV.

Inductance

InductanceInductance

Inductance

Auto Range 600 uH/6 mH/60 mH/600 mH/6 H/60 H/100 H
Resolution 0.1uH/0.001mH/0.01 mH/0.1 mH/0.001 H/0.01 H/0.1 H

Test frequency

100Hz /1KHz /10KHz (Auto frequency configuration)
600 uH ±( 5% + 5d )

Accuracy 6 mH/60 mH/600 mH/6 H ±( 1.5% + 5d )

60 H /100 H ±( 2.5% + 5d )

Over load protection

±30 DCV, 30 ACV.

4

Frequency

FrequencyFrequency

Frequency

Range 600 Hz/6 KHz/60 KHz/600 KHz/6 MHz/20 MHz
Resolution

0.1 Hz/0.001 KHz/0.01 KHz/0.1 KHz/0.001 MHz/0.01 MHz

Accuracy ±( 0.5% + 2d )
Sensitivity Min. 1 V rms, Max. 5 V rms.

OHMS

Range 600 Ω/6 KΩ/60 KΩ/600 KΩ/6 MΩ/60 MΩ
Resolution 0.1Ω/0.001 KΩ/0.01 KΩ/0.1 KΩ/0.001 MΩ/0.01 MΩ
Accuracy 600 ohm : ±( 1 % + 2d )

6K/60K/600K/6 M : ±( 1.5 % + 2d )

60 M : ±( 3 % + 5d )
Over load ±350 DCV, 350 ACV.
protection

Continuity Beeper

Beeper will sound if measured resistance less than 20 ohm.

Max. & Min. Measurement

During the operation can memorize the maximum and the
minimum measurement value.

Temperature

Auto Range Resolution Accuracy

-100.0 ℃ to 199.9 ℃ 0.1 ℃ ±( 1% + 1 ℃ )
200 ℃ to 1000 ℃ 1 ℃

-148.0 ℉ to 391.9 ℉ 0.1 ℉ ±( 1% + 2 ℉ )
392 ℉ to 1832 ℉ 1 ℉
Temp. probe The temperature probe ( TP-11 ) is the

optional accessory.

5

TACH

Range 500 -30000RPM
Resolution

10RPM

Accuracy ±( 1% + 2d )
OVERLOAD 24V DC/AC RMS ( within 1 min )
PROTECTION

DWELL

CYLINDER 3 CYL 4CYL 5CYL 6CYL 8CYL DUTY CYCLE
Range 0-120° 0-90° 0-72° 0-60° 0-45° 0-100%
Resolution

0.1°

0.1° 0.1° 0.1° 0.1° 0.1%

Accuracy ±( 1 % + 2d )

Over load ±200 DC/AC RMS (within 15 sec)
protection

Point

Range

≧ 0.2V ＜0.2V

ACCURACY

60V DC chang good ±( 1.2% + 2d )

Resolution 0.01V DC
Accuracy ±( 1.2% + 2d )

OPTIONAL ADAPTER

Range MAX. DISPLAY PER DIGIT ACCURACY

CAPACITY EQUAL

2000A 2000 1mV DC/AC ±( 1.2% + 2d )
IR TEMP 600.0 0.1mV DC

Remark :
* Spec. tested under the environment RF Field Strength

less than 3 V/M & frequency less than the 30 MHz only.

6

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Display 3-10 Function rotary switch
3-2 MAX/MIN ( ▼ ) button

3-11 Temp./ohm/V/Cap. input terminal
3-3 TIME (SET) button 3-12 COM input terminal
3-4 REL(Backlight) button 3-13 DWELL / TACH input terminal
3-5 HOLD ( ▲ ) button

3-14 10A input terminal
3-6 RANGE button 3-15 Battery compartment/Cover
3-7 VAHz button 3-16 RS232 terminal
3-8 ENTER button 3-17 DC 9V Power Adapter Input Socket
3-9 AC/DC button

7

4. PRECAUTIONS & PREPARATIONS FOR

MEASUREMENT

1) Ensure that the DC 9 V ( 006P, MIN1604 ) batteries are connected

with the right polarity and placed in the battery compartment
correctly.

2) Place the Red & Black Test Leads into the proper input

terminal before making measurement.

3) Remove either of the test leads from the circuit when

changing the measurement range.

4) Except operate the " Data Hold " function, it should

cancel the " Data Hold " function, otherwise the display
reading will freeze permanently.

5) Do not exceed the maximum rated voltage and current to

the input terminal.

6) Always switching the " Function Rotary Switch " to the

" Off " position when the instrument is not operation.

7) Remove the battery if the instrument is not to be used in

a long period of time.

8) For safety consideration, when change the new test

leads, it should use the replace test leads that already
approval of " CATIII-1000 V " at least.

9) Power On/Off management :

a. When not use the meter, should rotate the " Function rotary

switch " ( 3-10, Fig. 1 ) to the " OFF " position.

b. During the measurement, after 10 minutes the meter

will auto power off. If intend to power on again, it
should rotate the " Function switch " to " OFF "
position then set to the new desiring function position.

c. Disabling auto power off ( not auto power off )

Press the " TIME button " ( 3-2, Fig. 1 ) into
the setting mode,the Poff set " no "
auto power off function can be lifted.

8

5. MEASURING PROCEDURE

5-1 Symbols & units of display

Symbols Descriptions
Units

AUTO

Appears when selecting " Automatic range " mode.

MANU

Appears when selecting " Manual range " mode.

DC

Appears when selecting DC mode.

( DC voltage or DC current )

AC

Appears when selecting AC mode.
( AC voltage or AC current )

HOLD

Appears when the " Data hold " function is operated.

REL

Appears when the " Relative " function is operated.

Max

Appears when " Max and Min. value record "

Min

function is operated.
Battery voltage is already under the low condition.

Appears when the " Continuity beeper " is operated.

mV, V

Units for" voltage " measurements.

Ω,KΩ,MΩ

Units for " resistance" measurements.

A

Units for " Current " measurement.

uH,mH,H

Units for " Inductance " measurement.

pF,nF,uF,

Units for " Capacitance " measurement.

Hz,KHz,MHz

Units for " Frequency " measurement.
Appears when the " Diode " function is operated.

–

Appears when measuring a DCV or DCA value
is negative.

℃

℃℃

℃ ℉

℉℉

℉

Units for " Temperature " measurement.

– – – –

Over range indicator

RPM

Units for " TACH " measurements.
Appears when selecting " DWELL " mode.

P

%(duty cycle),indicate how high a duty cycle.

Degree

Units for " DWELL " measurement.

9

5-2 DC Voltage, AC voltage ture rms Measurement

1) Connect BLACK test lead into " COM " terminal ( 3-12,

Fig. 1 ).

2) Connect RED test lead into " V " terminal ( 3-11, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to

the " V " position.

4) Push the " AC/DC button " ( 3-9, Fig. 1 ) to select the

" ACV " or " DCV " measurement,

5) When LCD show the " AUTO " marker, the meter is

under the " auto range " mode. Meter will select the
suitable measurement range automatically.

6) Under the operation of " auto range " mode, push the

" Range button " ( 3-6 Fig. 1 ) once will execute the
" Manual Range " mode and hold the range, the LCD will
show the " MANU " marker.
Under the manual range operation, push the " Range
button " ( 3-6 Fig. 1 ) > 2 seconds, will return to auto
range operation.

Remark :

During the measurement, if push the " VAHz button " ( 3-7
Fig. 1 ) once, until the LCD show the " Hz " marker and the
display will show the frequency value of the measurement signal.

5-3 Resistance Measurement

1) Connect BLACK test lead into " COM " terminal ( 3-12,

Fig. 1 ).

2) Connect RED test lead into " Ω " terminal ( 3-11, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to

the " Ω " position.

4) When LCD show the " AUTO " marker, the meter is

under the " auto range " mode. Meter will select the
suitable measurement range automatically.

10

5) Under the operation of " auto range " mode, push the

" Range button " ( 3-6 Fig. 1 ) will execute the " Manual
Range " mode and hold the range, the LCD will show
the " MANU " marker.
Under the manual range operation, push the " Range
button " ( 3-6 Fig. 1 ) > 2 seconds, will return to auto
range operation.

5-4 DC Current, AC Current ture rms Measurement

A : 10A range, 6A range.

1) Connect BLACK test lead into " COM " terminal ( 3-12, Fig. 1 ).

2) For the " 10 A " current measurement, connect RED

test lead into " A " terminal ( 3-14, Fig. 1 ).

Open the circuit in which current is to be
measured. Now securely connect test leads in series
with the load in which the current is be measured.

3) For the " 10 A " measurement ( 6A,10A ), select the " Function rotary

switch " ( 3-10, Fig. 1 ) to " A " position.

4) Push the " AC/DC button " ( 3-9, Fig. 1 ) to select the

" ACA " or " DCA " measurement,

5) When LCD show the " AUTO " marker, the meter is

under the " auto range " mode. Meter will select the
suitable measurement range automatically.

11

6) Under the operation of " auto range " mode, push the
" Range button " ( 3-6 Fig. 1 ) once will execute the
" Manual Range " mode and hold the range, the LCD will

show the " MANU " marker.
Under the manual range operation, push the " Range
button " ( 3-6 Fig. 1 ) > 2 seconds, will return to auto
range operation.

Remark :

During the measurement, if push the " V/A/Hz button " ( 3-7
Fig. 1 ) once, until the LCD show the " Hz " marker and the
display will show the frequency value of the measuement signal.

5-5 Continuity Check

1) Connect BLACK test lead into " COM " terminal.

2)

Connect RED test lead into " Ω " terminal.

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " " position.

4) The LCD display will show the " " marker.

5) when the resistance value is less than 20 ohm, the beeper
sound will be generated.

5-6 Diode Test

1) Connect BLACK test lead into " COM " terminal.

2) Connect RED test lead into " V " terminal.

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " " position.
The LCD display will show the " " marker.

4) a. When connected with polarity as shown in Fig. 2, a

forward current flow is established and the approx.
Diode Forward Voltage (VF) value in volt will appears
on the display reading. If the diode under test is
defective, " 0.000 " or near " 0.000 " value ( short circuit )
" – – – – " ( open circuit ) will be displayed.

12

Fig. 2

Fig. 2

b. When connected as shown in Fig. 3, a reverse check on

the diode is made. If the diode under test is good, "– – – –"
will be displayed. If the diode under test is defective,
" 0.000 " or other numbers will be displayed. Proper diode

testing should include both steps a. and b. above.

Fig. 3

Fig.3

13

5-7 Capacitance Measurement

1) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " " position.

2) Connect the tested capacitor to " Input terminals " directly.

*

If the measured capacity existing the polarity, then
should connect the " ＋＋＋＋ " polarity of the measured
capacitor to the " " terminal ( 3-11, Fig. 1 ),
connect the " －－－－ " polarity of the measured
capacitor to the " COM " terminal ( 3-12, Fig. 1 ),

*

Full discharge the measured capacitor before the
make the measurement.

3) When LCD show the " AUTO " marker, the meter is
under the " auto range " mode. Meter will select the
suitable measurement range automatically.

4)

Capacitance measurement mode, no manual functions,

" Range button " ( 3-6 Fig. 1 ) is invalid.

5-8 Inductance Measurement

1) Connect BLACK test lead into " COM " terminal ( 3-12,
Fig. 1 ).

2) Connect RED test lead into " " terminal ( 3-11, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " " position.

4) When LCD show the " AUTO " marker, the meter is
under the " auto range " mode. Meter will select the
suitable measurement range automatically.

5) Inductance measurement mode, no manual functions,
" Range button " ( 3-6 Fig. 1 ) is invalid.

14

5-9 L/C Calibration

In order to improve the accuracy of a high / low impedance,
Recommend doing open / short calibration
Before measurement.

Open / short calibration procedure:

1)

Simultaneously push " AC / DC " and " REL " button more

to start open / short calibration,The display will show "OPEn",
than 2 seconds, then push "enter" key once,LCD will display 30,

and the countdown to zero,

2)

The display will show " Short ", set the input of a short circuit,
then pushthe "enter" key once,LCD will display 30, and the
countdown to zero, then the calibration data is saved to the
EEPROM, complete the calibration.

5-10 Frequency Measurement

1) Connect BLACK test lead into " COM " terminal ( 3-12, Fig. 1 ).

2) Connect RED test lead into " Hz " terminal ( 3-11, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to the
" Hz " position, LCD will show the " Hz " marker.

4) When LCD show the " AUTO " marker, the meter is
under the " auto range " mode. Meter will select the
suitable measurement range automatically.

5) Under the operation of " auto range " mode, push the
" Range button " ( 3-6 Fig. 1 ) once will execute the
" Manual Range " mode and hold the range, the LCD will
show the " MANU " marker.
Under the manual range operation, push the " Range
button " ( 3-6 Fig. 1 ) > 2 seconds, will return to auto
range operation.

15

5-11 Temperature Measurement

1) Plug in the optional " Type K Temperature probe, TP-11 "
into the input terminals, " TEMP input terminal " ( 3-11, Fig. 1 )
and the " COM input terminal " ( 3-12, Fig. 1 )

2) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " TEMP " position.

3) Temperature measurement mode, no manual functions,
" Range button " ( 3-6 Fig. 1 ) is invalid.

5-12 Tach. Measurement

1) Tach. Measurement is with INDUCTIVE PICKUP SENSOR,
IP-07 or IP-08 ( Optional ).

2) Connect above INDUCTIVE PICKUP sensor black test into
" COM " terminal ( 3-12, Fig. 1 ). and RED test lead into
" TACH " terminal ( 3-13, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " TACH. " position.

4) Connect the TACH. INDUCTIVE PICK UP SENSOR to
the high tension wire of No. 1 SPARK PLUG (or No. 2,
No. 3... SPARK PLUG), ref. Fig. 4, then the display
will show RPM reading .

NOTE:

a. RPM (TACH) used the "Secondary Tech"

measuring method, no matter what cylinder is

b. If the display reading is unstable, it may be caused

by environment interference. Please readjust the
position of RPM INDUCTIVE PICK UP SENSOR
or changed the direction of INDUCTIVE CLAMPS.

16

Fig. 4

5-13 "DWELL ANGLE" Measurement

1) Select the " Function rotary Switch " (3-10, Fig.1 ) to the
" DWELL" position.

2) Determine the % (duty cycle), 3 cyl, 4cyl, 5 cyl, 6 cyl .
by push the " Range Button " (3-6, Fig.1 ).

2) Connect black test lead into " COM" terminal ( 3-12, Fig. 1)
and red test lead into "DWELL" terminal ( 3-13, Fig. 1 ).

3) Connect red test probe into " BREAKER POINTS " or
" －－－－ " terminal of IGNITION COIL.
Connect black test probe into " GROUND" or "－"
terminal of battery.
* The wire connection diagram please ref.( Fig. 5)

4) Crank engine, the display will show the DWELL ANGLE
of points.

17

NOTE:

Only traditional ignition system car that built in
BREAKER POINTS needs to test DWELL ANGLE.
If the car in ELECTRONIC IGNITION SYSTEM need not.

Fig. 5

18

5-14 Point check

1) Connect BLACK test lead into " COM " terminal ( 3-12,
Fig. 1 ).

2) Connect RED test lead into " V " terminal ( 3-11, Fig. 1 ).

3) Select the " Function rotary switch " ( 3-10, Fig. 1 ) to
the " POINT " position.

4) a. Disconnect " HIGH TENSION WIRE " from distribution cape

& ground " HIGH TENSION WIRE " by laying or taping lug
to bare metal surface.

b.

Connect RED TEST PROBE to " － " terminal of ignition
coil ( or points )The display will show the point condition
" good " or " CHg " and the volatgethat apply to the point.

c. Turn ignition switch to ON for a while . Display values

should indicate in LOW voltage ( should under 1V ).if not,
bump engine until it reach.

d. * If the above ( c. ) point voltage display showed lower than

0.2V, then the contact resistance of " Break points " is
normal, at the same time display will show " good ".

* Though the above ( c. ) point voltage already under

the 1V but larger than 0.2V , then the contact resistance
of " Break points " is not good and need to change, at
same time dsplay will show " CHg " (chang ).

5-15 Optional Adapter

A.

2000A ( 2000A DC/AC CURRENT PROBE ):
This range is exactly same as " DC 2V " range but
without decimal point. It can match the 400 A or 2,000 A
range of optional " DC/AC CURRENT PROBE "
( such as CA-502, CA-203 ), then can get current
values on the display directly.

19

B.

IR TEMP
This range is exactly same as " DC 200 mV " range. it
can match the external adapter (if this adapter is
built-in DC 200 mV output), then can get current values
on the display directly.

5-16 Relative Measurement

1) During the measurement of ACV, ACA, DCV, DCA,
ohm, Capacitance, Inductance, Frequency and Temperature,
the circuit will memorize the last measured values if push the
" REL. button " ( 3-4, Fig. 1 ) at once, then LCD will
show zero value & a " REL " indicator.

2) The input measured values will deduct last measured
values automatically, then show those new value on the
display.

3) It will cancel the Relative Measurement function if push
the REL. button at once again, at same time the " REL ."
marker will disappear.

5-17 Data Hold Operation

1) During the measurement, pushing the " Hold button "
( 3-5, Fig. 1 ) once a while will freeze the measured value
& the LCD will indicate " HOLD " symbol.

2) Push the " Hold Button " again to cancel the data hold
function.

5-18 LCD Backlight ON/OFF

During the measurement, press the
" REL Button " ( 3-2, Fig. 1 )> 2 seconds will turn ON the
" LCD Backlight ".
Press the " REL Button " once again > 2 will turn OFF the
" LCD Backlight " .

20

5-19 Max and Min. value record

1) Application : To record the maximum and the minimum
reading value during the measurement.

2) Push the " MAX/MIN button " ( 3-2, Fig. 1 ) at once ,
the display will show the " REC " markers
Start recording meter the " Max. " and " Min. " value.

3) Push the " MAX/MIN button " ( 3-2, Fig. 1 ) once again
the display will show the " MAX " maker along with
the maximum measured value.
Push the " MAX/MIN button " ( 3-2, Fig. 1 ) once again
the display will show the " Min " maker along with
the minimum measured value.

4) If intend to cancel the " Max/Min Record function" just
push the " MAX/MIN button " ( 3-2, Fig. 1 ) > 2 seconds
the " REC " marker will disappear.

5-20 RS232 computer interface

1) Connect the optional RS232 cable (UPCB-06) of
RS232 terminal (3-16, Fig. 1)

2) The meter will be the serial data via
" RS232 Terminal " is transferred to the computer.

The data output is a 16 digit stream which can be
utilized for user's specific application.

The 16 digits data stream will be displayed in the
following format︰
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

21

Each digit indicates the following status :

D15 Start Word (0X02)
D14 4
D13 When send the upper display data = 1

D12, D11 Annunciator for Display

DC mV = 18 AC mV = 49 uH = 68
DC V = 34 AC V = 50 mH = 41
DC uA = 35 AC uA = 51 H = 42
DC mA = 37 AC mA = 53 Hz = 31
DC A = 36 AC A = 52

KHz = 33

Ω = 38

pF = A4

MHz = 67

KΩ = 39 uF = 44

℃ = 01

MΩ = 40 nF = 43

℉ = 02

DIODE = 46

RPM = 27 Dwegll = 32

D10 Polarity

0 = Positive 1 = Negative

D9 Decimal Point(DP), position from right to the

left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP

D8 to D1 Display reading, D1 = LSD, D8 = MSD

For example :

If the display reading is 1234, then D8 to
D1 is : 00001234

D0 End Word (0x0D)

RS232 FORMAT : 9600, N, 8, 1

Baud rate 9600
Parity No parity
Data bit no. 8 Data bits
Stop bit 1 Stop bit

22

6. ADVANCED SETTING

Under do not execute the Datalogger function,
press the " SET Button " ( 3-3, Fig. 1 ) continuously at
least two seconds will enter the " Advanced Setting " mode.
then press the " SET Button " ( 3-3, Fig. 1 ) once a while
in sequence to select the six main function, the
display will show :

PoFF..........................

SET Auto power OFF management

bEEP.......................

Set beeper sound ON/OFF

dAtE.......................

Set clock time ( Year/Month/Date, Hour/Minute/
Second )

t-CF……………….

Set Temperature unit ℃ or ℉

Remark :
In the implementation of the "Advanced Settings" function,
If within 10 seconds without work, will exit
" Advanced Settings " function, the LCD will return
Normal screen.

6-1 Set Auto power OFF management

When the display show " PoFF "

1) Use the " ▲ Button " ( 3-5, Fig. 1 ) or " ▼ Button "
( 3-2, Fig. 1 ) to select the upper text to " YES " or
" no ".

YES - Auto Power Off management will enable.
no - Auto Power Off management will disable.

2) After select the upper text to " YES " or " no ", press the
" Enter Button " ( 3-8, Fig. 1 ) will save the setting
function with default.

23

6-2 Set beeper sound ON/OFF

When the display show " bEEP "

1) Use the " ▲ Button " ( 3-5, Fig. 1 ) or " ▼ Button "
( 3-2, Fig. 1 ) to select the upper text to " YES " or
" no ".

YES - Meter's beep sound will be ON with default.
no - Meter's beep sound will be OFF with default.

2) After select the upper text to " YES " or " no ", press the
" Enter Button " ( 3-8, Fig. 1 ) will save the setting
function with default.

6-3 Set clock time ( Year/Month/Date,Hour/Minute/ Second )

When the upper display show " dAtE "

1) Use the " ▲ Button " ( 3-5, Fig. 1 ) or " ▼ Button "
( 3-2, Fig. 1 ) to adjust the value ( Setting start from
Year value ). After the desired value is set, press the
" Enter Button " ( 3-8, Fig. 1 ) once will going to
next value adjustment ( for example, first setting
value is Year then next to adjust Month, Date, Hour,
Minute, Second value ).

Remark :
The adjusted value will be flashed.

2) After set all the time value ( Year, Month, Date, Hour,
Minute, Second ), press the " SET Button " ( 3-3, Fig.
1 ) once will save the time value, then the screen will
jump to " Temp.

℃, ℉ unit " setting screen .

24

Remark :
After the time value is setting, the internal clock will
run precisely even Power off if the battery is under
normal condition ( No low battery power ).

6-4 Set Change the Temp.

℃℃℃℃, ℉℉℉℉

unit

a.

Use "

▲

button " ( 3-5, Fig. 1 ) to select "

℃

" or "

℉

".

b.

After select the desiring text (

℃

or ℉ ), press the

" Enter button " ( 3-8, Fig. 1 ) to save the data with
default.

25

7. MAINTENANCE

7. MAINTENANCE7. MAINTENANCE

7. MAINTENANCE

7-1 Battery replacement

7-1 Battery replacement7-1 Battery replacement

7-1 Battery replacement

Caution :

Caution :Caution :

Caution :

Remove test leads before

Remove test leads beforeRemove test leads before

Remove test leads before
opening the battery cover !

opening the battery cover !opening the battery cover !

opening the battery cover !

1) When the LCD display showing the mark of " ", it is
necessary to replace the battery, However in-spec.
measurement may still be made for several hours after "
Low battery indicator " appears before the instrument
become inaccurate.

2) Open the screw of " Battery Cover " ( 3-15, Fig. 1 ) by
loosing the screws, then
move the battery.

3) Replace with 9 V batteries ( 006P, MIN1604 ) and
reinstate the cover.

7-2 Cleaning

Caution :

Cleaning - Only use
the dry cloth to clean
the plastic case !

26

7-3 Replacement of Fuse

Caution :

When make the replacement,
should change the right spec
fuse.

Fuse

Rating : 10 A, Size : 5.2 mm dia. x 20 mm

To be protected the circuit from overload current at
" 10 A " range.

2) When the uA, mA current range can not operation,
please check if the Fuse A is broken or not:
When the 10 A current range can not operation,
please check if the Fuse B is broken or not:

3) When replace the fuse should take the test leads from the
measuring circuit and power off the meter.

4) Take the screws away from the down case, loose the
housing case, the fuses are install on the fuse socket on
the PCB.

5) For safety consideration, when replace the fuse according
the spec. ( should use the approval fuse ) and reinstall the
cover.

6) Make sure the housing case is secured with the screw
after replace the fuse.

27

8. OPTIONAL ACCESSORIES & ADAPTERS

RS232 cable * Computer interface cable.
UPCB-06 * Used to connect the meter to

the computer ( COM port ).
USB cable * Computer interface cable.
USB-11 * Used to connect the meter to

the computer ( USB port ).

Item Model
Carrying Case CA-05A
Light Adapter LX-02
EMF Adapter EMF-824
Pressure Adapter PS-403
Anemometer Adapter AM-402
Tachometer Adapter TA-601
Sound Adapter SL-406
High Voltage Probe HV-40
1000A CURRENT Adapter CA-502
2000A CURRENT Adapter CA-203
Temperature Probe ( TYPE K ) TP-11

28

9. THE ADDRESS OF AFTER SERVICE

CENTER

29