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DT5811 Operator’s Manual
1. INTRODUCTION
This AUTOMOTIVE TESTER is a compact precision, battery operated, LCD
display 3-½ digits Digital Instrument..
Superiority:
9
High
accuracy
9
Digital height 22mm
9
Single 30 position rotary switch for FUNCTION and RANGE
selection, allows fast and convenient operation.
9
Curvilinear mode soft case.
9
Colored indication jack with fully protection test leads.
9
Lower overage power Auto-Power Off
2. GENERAL
SPECIFICATION
1) Display: 3-½ digits LCD with a maximum reading of 1999.
2) Measurement rate: updates 2-3/sec.
3) Over range indication: “1” figure only in the display
4) Automatic negative polarity indication.
5) The
“
” is displayed when the battery voltage drops below the
operating voltage.
6) Full range over load protection.
7) Auto Power Off: It will be automatically cut off in about 15 minutes after
the power is turned on. It needs to be turned off and turned on again to
continue the power.
8) Operating temperature: 0°C~40°C, 0~75% R.H.
Storage temperature: -10°C~50°C, 0~75% R.H.
9) Power: Single standard 9V battery IEC 6F22,NEDA 1604, JIS 006P.
10) Dimensions: 176L*88W*38Hmm.
11) Weight: approx 310g (including battery)
12) Accessories: test leads (pair), spare fuse 0.5A piece in case, operator’s
manual.
3. ELECTRICAL
SPECIFICATIONS
Accuracy is given as ± (% of r number of least significant digits) for
one year, at 23°C±5°C RH<75%
1) DCV
R ange
R esolution
A ccuracy
2V
1m V
20V
10m V
200V
0.1V
1000V
1V
±(1.0% +2)
±(0.8% +2)
Input impedance: 10M
Ω
on all range
2) ACV
R ange
R esolution
A ccuracy
2V
1m V
20V
10m V
200V
0.1V
750V
1V
±(1.2% +3)
±(0.8% +3)
Input impedance: 10M
Ω
Frequency range: 40 ~ 400Hz
3) DCA
R ange
R esolution
A ccuracy
20m A
10uA
±(1.8% +2)
200m A
0.1m A
±(2.0% +2)
20A
10m A
±(2.0% +10)
Measuring voltage drop: 200mV
4) ACA
R ange
R esolution
A ccuracy
20m A
10uA
±(2.0% +3)
200m A
0.1m A
±(2.0% +5)
20A
10m A
±(2.5% +10)
Measuring voltage drop: 200mV Frequency range: 40 ~ 400Hz
5) OHM
R ange
R esolution
A ccuracy
200
Ω
0.1
Ω
±(1.0% ±10)
20K
Ω
10
Ω
200K
Ω
100
Ω
20M
Ω
10K
Ω
±(1.0% ±10)
±(1.0% ±4)
6) TEMPERATURE
R ange
R esolution
A ccuracy
-40
℃
~ 400
℃
±(1.0% +4)
400
℃
~ 1000
℃
±(1.5% +15)
1
℃
With K-type thermocouple wire
7) DWELL
ANGEL
R ange
S cope(°)
R esolution
Accuracy
3 C YL
0 ~ 120
4 C YL
0 ~ 90
5 C YL
0 ~ 72
6 C YL
0 ~ 60
8 C YL
0 ~ 45
0.1°
±(2.0% ±5)
8) TACHO
R ange
S cope
R esolution
Accuracy
3 C YL
4 C YL
5 C YL
6 C YL
8 C YL
10 x R P M
±(1.5% ±5)
20000P R M
4.
PRECAUTIONS AND PREPARATIONS FOR MEASUREMENT
1) Be sure that battery is correctly placed in the battery case and
connected to the battery snap.
2) Don’t exceed the input limit shown below:
Function Range
Input terminals
Maximum input
DCV 2~1000V
1000VDC
ACV 2~750V
750VAC
OHM
Diode
DCA 200mA
ACA 200mA
DCA 20A
20A DC/AC
ACA 20A
20A DC/AC
A COM
V
Ω
COM
V
Ω
COM
250V DC/AC
mA COM
200mA DC/AC
3) Inspect the test leads for damaged insulation or exposed metal. Check
Test lead continuity. Damaged leads should be replaced.
4) Select the proper function and range for your measurement.
5) Check the input terminal position for red test lead depends on
measurement ranges.
6) Either one of the test leads should be taken off from the circuit under test
when changing the test ranges.
7) To avoid electrical shock or damage to the meter; Do not apply more
then 500V between any terminal and earth ground.
8) To avoid electronic shock, use caution when working above 60VDC or
25VAC rms, such voltage pose a shock hazard.
9) When finished the measurement, switch off the power. Be sure to
remove the battery when it is not used for a long time to avoid leakage
problem.
10) Do not tamper with the circuitry to avoid damage.
11) Do not use or store the instrument in a place of direct sunlight, high
temperature and high humidity.
5.
METHOD OF MEASUREMENT
5.1 DCV & ACV MASUREMENT
1) Set the Function range switch at the required position.
2) Connect black test lead to “COM” terminal and red test lead to the “V
Ω
”
input terminal.
3) Connect test leads to measuring point and read the display value the
polarity of the red lead connection will be indicated at the same time as the
voltage.
Note:
a) If the voltage to be tested is unknown beforehand, set the Function
range switch to the highest range and work down.
b) When only the figure “1” is displayed over range is being indicated
and the function range switch has be set to a higher range.
c) Never try to measure the voltage above 1000V! Although the
indication is possible to show, there is danger of damaging the
internal circuitry.
5.2 DCA & ACA MEASUREMENT
1) Connect the black test lead to the “COM” terminal and the red test lead
to “mA” terminal for a maximum of 0.2A.
2) Set the function range switch at the required position.
3) Connect test leads to measuring points and read the display value. The
polarity at the red test lead connection will be indicated at the same time as
the current.
Note:
a) If the current range is unknown beforehand, set the function range
