rolson 27259 User manual

IV. OPERATION INSTRUCTION:
1. DC Voltage Measurement V(DCV):
1.1 Connect RED test lead to “V mA” jack, BLACK test lead to “COM” jack.
1.2 Set the FUCTION switch to the desired V(DCV) position. If not sure, set to the
highest range.
1.3 Connect the test leads across the source or load under measurement.
2. DC Current Measurement A (DCA):
2.1 Connect the RED test lead to “V mA” jack when the current is less that 200 mA
and to “10A” jack when the current is larger than 200 mA. Connect the BLACK test
lead to the “COM” jack. Set the FUNCTION switch to the desired DCA position.
Connect the test leads across the source or load under measurement.
3. AC Voltage Measurement V (ACV):
3.1 Connect the RED test lead to “V mA” jack and BLACK test lead to the “COM” jack.
3.2 Set the FUCTION switch to the desired ACV position
3.3 Connect the test leads across the source or load under measurement.
4. Resistance Measurement:
4.1 Connect the RED test lead to “V mA” jack and BLACK test lead to “COM” jack.
4.2 Set the FUNCTION switch to the OHM position.
4.3 Connect the test leads across the resistor under measurement.
4.4 When measuring the resistance, the power should be turned off and in short circuit
staues by connecting the two test leads.
5. Transistor hFE Measurement:
5.1 Set the FUNCTION switch to the hFE position.
5.2 Insert the E.B.C. of the PNP or NPN transistor to the proper jack in the socket on the
front panel.
6. Diode and Audible Continuity Measurement
6.1 Connect RED test lead to the “V mA” jack and BLACK test lead to the “COM” jack.
6.2 Set the FUNCTION switch to the position and connect the RED test leads
to the ANODE of diode and BLACK to CATHODE. The display will the show the
approx. Forward voltage of the diode. If connect the test leads on the other way
round, the display will show an overrange status”1”
6.3 Buzzer sounds if the resistance between the two probes less than approximately 70.
7. Battery Test:
7.1 Connect RED test lead to the “VΩmA”jack and BLACK test lead to the “COM” jack.
7.2 Turn the FUNCTION switch to the BATT position. Connect the test lead across the
battery under measurement. The display will show the voltage of the battery.
V. BATTERY AND FUSE REPLACEMENT:
When the voltage of the battery is low, the symbol “BATT” will appear on
the display. Then the battery should be replaced. You should check the fuse when
no measurement could be taken for current using mA range.
Digital Multimeter
27259
Operating Manual
- 3 -
To Prevent Serious Injury From Accidental Operation:
Turn The Power Switch Of The Tool To Its “Off” Position
And Remove The Test Leads Before Performing Any Inspection,
Maintenance, Or Cleaning Procedures.
WARNING

Thanks for buying our product. Please go through the instruction manual before starting to use
the meter.
Safety Instructions
To avoid an electric shock or injury, read and follow the instructions. If at all unsure seek advice
from a suitably competent and qualifies person before use. Retain instructions for future reference.
• Check the meter and leads before use, if damaged do not use. Ensure insulation around leads
and connectors are not damaged. This product has no serviceable parts
• Do not use in area where there is flammable vapour or gas
• Do not use above the marked voltages
• When measuring current, turn off the circuit before using the meter
• Keep fingers behind the fingers guards on the probes and remove probes before replacing the
battery. Do not use without the battery cover. Replace battery when the low battery indicator
appear
• Connect the common test lead before the live test lead, when disconnecting, disconnect the
live lead first
• Caution when working above 30V AC, 42V peak or 60V DC as these pose a shock hazard.
Do not measure voltages above 500V in category 1 installations
I. INTRODUCTION:
1. Switch
Our DMM adopt rotational switch which situated at the middle of the front case.
It is used for the selection of FUNCTION, RANGE AND POWER ON - OFF.
In order to save energy, please turn the switch to “OFF” position when not in use.
2. Display
3 12mm Height LCD Display.
3. “COM” Jack
Common Jack
4. “VΩmA” Jack
Voltage, resistance, no more than 200Ma,
current and battery input test jack,
50Hz sine wave output jack.
5. “10A” Jack
For the input of more than 200mA current
II. FEATURES:
Display: 3 LCD With Maximum Display 1999.
Polarity: Auto Polarization
Overrange: Maximum Display “1”
Working Environment: Temp. 0 - 40˚C Relative
Storing Environment: - 15 - 50˚C
Battery: 9V
High Voltage Symbol: DC 1000V or AC 750V range will show high voltage symbol ”HV”
Low Voltage Indication: Left side of LCD will show or BAT symbol.
Weight: 126g Not Include Battery
III. TECHNICAL SPECIFICATION:
Accuracy: +a% Reading + No. Of Digits
Guaranteed For 1 Year.
Environmental Temperature: 23˚C + 5˚C
Relative Humidity: <75% - 1 -
Range
200mv
Resolution
100uv
Accuracy
±0.5% of Rdg ±2 Digit
- 2 -
2mV 1mV
20mV 10mV
200V 100mV
1000V
Input impedance: 1M
Overload protection: DC or AC peak value of 1000V.
2. DC Current:
1. DC Voltage:
  

RANGE RESOLUTION ACCURACY
200uA 100nA
1uA
10uA
100uA
10mA
100mV
1V
2000uA
20mA
±1% of rdg ±2D
±1.2% of rdg ±2D
±2% of rdg ±2D
200mA
10A
Overload protection: 02A/250V fused 10 A range not fused.
3. AC Voltage:

RANGE RESOLUTION ACCURACY
200V
1000V
±1.2% of rdg ±10D
Frequcucy range: 45Hz to 400Hz
Overload protection: AC 750V rms
Indication:Average value(rms of sine wave.)
4. Resistance:

RANGE RESOLUTION ACCURACY
200Ω
2000Ω
20KΩ
200KΩ
2000KΩ
100mΩ
1Ω
10Ω
100Ω
1KΩ
±0.8% of rdg ±20D
Overload protection: 250VDC or AC rms.Less than 10 sec.
Maximum open circuit voltage: 2.8V
5. Transistor hFE:
Vce approximately 2.8V,1b approximately 10A.
Display show approximately hFE 0-1000.
6. Dlode and Audible Continulty:
Diode: Testing voltage approx. 2.4V, current 1.5Ma. indicate forward diode approx. value.
Buzzer: Sounds when measure less than 70 ± 20.
7. Battery Test:
RANGE CURRENT CONSUNED
1.5V
9V
50mA
5mA
±0.8% of rdg ±3 Digit1V
DC Volt
Selection
Area
OHM
Selection
Area
AC Volt
Selection
Area
Switch DC Amp
Selection
Area
Transistor
Selection
Area
10A Jack
Transistor
/hFE Jack
Com JackDiode
Selection
Area
“VΩmA”
Jack