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

rolson 27259 Specifications

General

Diode Test	Yes
Transistor Test	Yes
Continuity Buzzer	Yes
Square Wave Output	No
Display Type	LCD
Display Digits	3.5
AC Voltage	200V
DC Current	200μA/2mA/20mA/200mA/10A
Resistance	200Ω/2kΩ/20kΩ/200kΩ/2MΩ
Battery Type	9V
Frequency Range	No

Summary

Operation Instructions

DC Voltage Measurement V(DCV)

Instructions for measuring DC Voltage using the multimeter.

DC Current Measurement A (DCA)

Steps for measuring DC Current with the multimeter.

AC Voltage Measurement V (ACV)

Procedure for measuring AC Voltage with the multimeter.

Resistance Measurement

How to measure resistance using the multimeter.

Transistor hFE Measurement

Guide to measuring transistor hFE parameter.

Diode and Audible Continuity Measurement

Steps for testing diodes and continuity.

Battery Test

How to test batteries with the multimeter.

Battery and Fuse Replacement

Introduction

Switch

Description of the rotational switch for function and power selection.

Display

Information about the 12mm Height LCD Display.

COM Jack

Description of the Common Jack for connections.

VΩmA Jack

Details on the VΩmA Jack for various measurements.

10A Jack

Information regarding the 10A Jack for high current input.

Features

Display

Details on the 3-digit LCD with a 1999 maximum display.

Polarity

Information on the auto polarization feature.

Overrange Indicator

Explanation of the overrange indicator.

Working Environment

Specifications for the working environment temperature.

Storing Environment

Specifications for the storing environment temperature.

Battery

Information about the 9V battery used.

High Voltage Symbol

Details on the high voltage symbol indicator.

Low Voltage Indication

Explanation of the low voltage indication symbols.