SDAR 830A, 830B, 830D, 830C User manual

DIGITAL MULTIMETER
MODEL: SDT-830A/B/C/D
Users Manual
TABLE OF CONTENTS
1. Introduction
2. Safety note
3. Product illustration
4. Specification
4-1. General feature
4-2. Electrical specification
5. Measurement operation
5-1. DC voltage measurement
5-2. AC voltage measurement
5-3. Resistance measurement
5-4. Diode measurement
5-5. Continuity Measurement
5-6. DC current measurement
5-7. Temperature measurement
6. Maintenance
6-1. Replacement fuse
6-2. Replacement battery
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1. Introduction
This Meter is designed to meet IEC61010-1 & CAT III 600V over voltage
category . The meter with holster that is giving the main body, though
downsized, high resistance against the shock of a drop.
This operating instruction covers information on safety and caution.
The DMM as general measurement tool and widely used in the school,
laboratory, factory and other social field.
2. Safety note
Warning
To avoid possible electric shock or personal injury and to avoid possible
damage to the meter or to the equipment under test, adhere to the following
rule:
Do not apply more than the rated voltage, of marked on the meter,
between the input terminal and grounding terminal..
Do not apply voltage between COM and OHM terminal, in the
resistance measuring state.
Do not expose the instrument to the direct sun light, extreme
temperature and humidity or dew full.
Inspect the test lead for damaged insulation or exposed metal.
Before measuring current, check the Meter’s fuses and turn off
power to the circuit before connecting the meter to the circuit.
Disconnect circuit power and discharge all high voltage capacitors
before testing continuity, diode, resistance, capacitance or current.
Electrical Symbol:
CAT
III Measurement category III is applica
ble to test and measuring circuits co
nnected to the distribution part of th
e building’s low voltage MAINS insta
llation
3. Product illustration

1LCD display
2‘HOLD” push button
3Rotary switch
4“10A” jack
5“COM”jack
6“VΩmA” jack
7“Backlight ”push button(SDT-830C)
4．Specification
4-1. General feature
●Manual ranging DMM , that full scale is 1999counts
●Display : 3 1/2 digit LCD display..
●DATA HOLD function
●Backlight function(only SDT-830C)
Press BACK LIGHT, lit backlight, automatic put out for about 5 seconds. To light
again, need to press it again (note: when the battery is insufficient, the brightness
of the backlight will not enough).
●Operating temperature & Humidity: 0—40℃(32 —104℉) & < 75% RH
●Storage temperature & Humidity: -10—50℃(14 —122 ℉) & <80%RH
●Low battery indication. “ ”appears on the display
● Battery type: 9V Battery(6F22 or 1604A )
●Fuse type: F1 250mA/600v F2 10A/600v
●Dimension (L x W x H) : 142 x 75 x 42mm
● Weight(including battery) :Approx 200g
●Altitude: up to 2000m
●Pollution degree: 2
●Ingress protection degree: IP20
●Test leads type:CAT Ⅲ600V 10A
● Safety Class: CAT III 600V
4-2. Electrical specification (at2
3±5℃; <75% RH)
2
4
5
6
1
3
7

Model
Functions
SDT-830A SDT-830B SDT-830C SDT-830D
AC Voltage
Range 200V/600V 200V/600V 200V/600V 200V/600V
Accuracy ±（2% rdg + 10dgt）±（ 2% rdg + 10dgt）±（ 2% rdg + 10dgt）±（ 2% rdg + 10dgt）
DC Voltage
Range 200mV//200V/600V 200mV/200V/600V 200mV/200V/600V 200mV/200V/600V
Accuracy ±（0.5% rdg + 5dgt）±（ 0.5% rdg + 5dgt）±（ 0.5% rdg + 5dgt）±（ 0.5% rdg + 5dgt）
DC Voltage
Range 2V/20V 2V/20V 2V/20V 2V/20V
Accuracy ±（1.5% rdg + 5dgt）±（1.5% rdg + 5dgt）±（1.5% rdg + 5dgt）±（1.5% rdg + 5dgt）
DC Current
Range 20μA/200μA/2mA/20m/200
mA/10A
20μA/200μA/2mA/20m/200m
A/10A
20μA/200μA/2mA/20m/200mA
/10A 200μA/2mA/20m/200mA/10A
Accuracy
±（1.2% rdg + 5dgt）/±
（3% rdg + 15dgt）（10A）
±（ 1.2% rdg + 5dgt）/±（ 3%
rdg + 15dgt）（10A）
±（1.2% rdg + 5dgt）/±（3%
rdg + 15dgt）（10A）
±（ 1.2% rdg + 5dgt）/±（ 3%
rdg + 15dgt）（10A）
Resistance
(Ohms)
Range 200/2K/20K/200K/2M 200/2K/20K/200K/2M 200/2K/20K/200K/2M 200/2K/20K/200K/2M
Accuracy ±（0.8% rdg + 5dgt）±（ 0.8% rdg + 5dgt）±（ 0.8% rdg + 5dgt）±（ 0.8% rdg + 5dgt）
Temperature
Range -40—400℃
Accuracy ±（3% rdg + 3dgt）
Continuity (audible) YY Y
Diode Test Y YY Y

5. Measurement operation
5-1. DC voltage measurement
Warning
To avoid harms to you or damage to the meter from electric
shock. Please do not attempt to measure voltage higher than
DC/AC 600V although readings may be obtained.
1. Insert the red test lead into the “VΩmA” jack and the black test lead
into the “COM” jack.
2. Set the rotary switch to desired DCV position. If .the voltage to be
measured is not known beforehand, set range switch at the highest range
position and then reduce it until satisfactory resolution is obtained.
3. Connect the test lead across with the object under testing.
The measured value will be show on the LCD display.
5-2.AC voltage measurement
1.Insert the red test lead into the “VΩmA” jack and the black test lead
into the “COM” jack.
2. Set the rotary switch to desired ACV position(200V/600Vranges)
3. .The measured value will be show on the LCD display.
5-3. Resistance measurement
To measure resistance, connect the meter as follows:
1. Insert the red test lead into the “VΩmA”jack and the black test lead
into the “COM” jack..

2. Set the rotary switch to proper resistance range..
3. Connect the test lead across with the object under testing.
The measured value will be show on the LCD display.
Note:
The test lead can add 0.1Ωto 0.3 of error to resistance measurement.
To obtain precision reading in low-resistance measurement, that is the
range of 200.0 Ω, short the input terminal before measuring. In this
time, the contact resistance displayed on the LCD. You can subtract
the contact resistance value from the measured value.
5-4. Diode measurement
1. Turn the rotary switch to the diode/continuity position.
2. Insert the red test lead into the “VΩmA”jack and the black test lead into the
“COM” jack.
3.Use the diode test mode to check diodes, transistors and other semiconductor
device. In the diode test mode sends a current through the semiconductor
junction, and the measure the voltage drop across the junction. A good silicon
junction drop between 0.5V and 0.8V.
4. For forward voltage drop reading on any semiconductor component, place the
red test lead on the component anode and place the black test lead on the
component cathode. The measured value show on the display.
5. Reverse the test lead and measure the voltage across the diode again.
If diode is good, the display shows “1”.
If diode is shorted, the display shows 0 (zero) in both direction.
If display shows “1” in both direction, the diode is open.
5-5. Continuity Measurement
1.Turn the rotary switch to the diode/continuity position.
2. insert the red test lead into the “VΩmA”jack and the black test lead into the
“COM” jack.
3. If the resistance is under 60Ω, the beeper will sound continuously.
5-6. DC current measurement
1. Turn off power to the circuit. Set the rotary switch to the desired
position.
2. Break the current path to be tested. Connect the red test lead to the
more positive side of the break and the black test lead to the more
negative side of the break.
3. Turn on power to the circuit. The measured value show on the display.
4. “10A” jack is used to measure 10A current..
Note:
For safety’s sake, the measuring time for high current should be
≤10 second for each measurement and the interval time between
two measurement should be greater than 5 minutes.
When current measurement has been completed, disconnect the
connection between the testing lead and the circuit under test.
5-7. Temperature Measurement (SDT-830D)
The Meter measures the temperature of a type-K thermocouple (included).
Warning
To avoid possible damage to the Meter or other equipment, remember that the
included K-Type thermocouple is rated below 400℃.
1. Set the rotary switch to the “TEMP” range.
2. Insert the K-type probe to the two “COM” and “VΩ℃”terminal.

3.The measured temperature value will be displayed on the LCD.
6. Maintenance
6-1. Replacement fuse
Replacing the defective fuse should the done according to the following
procedure.
(1) To avoid electrical shock, remove the test lead and any input signal
before opening the bottom case.
(2) Open the bottom case and then remove the defective fuse and insert a
new fuse of the same size and rating.
(3) Replace the bottom case and install all the screw.
6-2. Replacement battery
When meter display the battery must be replace to maintain
normal operation.
(1) Disconnect and remove all test probes from any live source and meter.
(2)Open the bottom case by screwdriver.
(3) Replace with one fresh 9 volt battery.
(4) Replace the bottom case and install all the screw.
SHANGHAI SDAR ELECTRONIC INSTRUMENTS CO., LTD.
NO. 1158, KAIMING RD., SONGJIANG INDUSTRIAL PARK,
SHANGHAI, CHINA,PC: 201600
TEL: [phone] FAX: [phone]