Gw-instek GDM-350B Bedienungsanleitung

Handheld Digital Multimeter GDM-350B USER MANUAL GW INSTEK PART NO. 82DM-350B0M01 ISO-9001 CERTIFIED MANUFACTURER

GDM-350B User Manual 8 The Meter Structure (see diagram 1) 1. LCD Display 2. Power Button 3. Rotary Switch 4. Input Terminals 5. HOLD Button

MEASUREMENT OPERATION 9 MEASUREMENT OPERATION First check to see that the 9V battery is charged. Turn the rotary switch to a measurement position. I

GDM-350B User Manual 10 DC or AC Voltage Measurement (see diagram 2) Diagram 2 1. Turn the rotary switch to the V or V position for voltage me

MEASUREMENT OPERATION 11 high impedance circuits. If the circuit impedance is less than or equal to 10kΩ, the error is negligible (0.1% or less).

GDM-350B User Manual 12 DC Current Measurement (see diagram 3) Diagram 3 1. Turn the rotary switch to the “A “ position for current measurement.

MEASUREMENT OPERATION 13 Warning:  Pre-requisites: Remove the power from the circuit before connecting the test leads to the DUT.  Select the co

GDM-350B User Manual 14 Resistance Measurement (see diagram 4) Diagram 4 1. Turn the rotary switch to the “Ω” position for resistance measurement

MEASUREMENT OPERATION 15 Warning:  If the LCD displays “1”, it indicates the circuit is open or that the resistance exceeds the maximum range of

GDM-350B User Manual 16 Diode Measurement (see diagram 5) Diagram 5 1. Turn the rotary switch to the “ ” position for diode measurement. 2. I

MEASUREMENT OPERATION 17 Warning:  The LCD displays “1” to indicate that the circuit is open or that the polarity of the diode is incorrect.  T

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GDM-350B User Manual 18 Continuity Measurement (see diagram 6) Diagram 6

MEASUREMENT OPERATION 19 1. Turn the rotary switch to the “ ” position. 2. Insert the red test lead into the “ΩmA” terminal and the black test

GDM-350B User Manual 20 Transistor hFE measurement (see diagram 7) Diagram 7

MEASUREMENT OPERATION 21 1. Turn the rotary switch to the “hFE” position. 2. Put the multi-purpose socket into the terminal. 3. Check whether the

GDM-350B User Manual 22 Temperature Measurement (see diagram 8) Diagram 8

MEASUREMENT OPERATION 23 1. Turn the rotary switch to the “˚C” position. 2. Put the multi-purpose socket into the correct terminal. 3. The K-type

GDM-350B User Manual 24 ACCURACY SPECIFICATIONS Accuracy: ±(a% reading + b digits), guaranteed for 1 year Operating temperature: 23˚C ± 5˚C Relativ

ACCURACY SPECIFICATIONS 25 AC Voltage Range Resolution Accuracy 200V 0.1V ±(1.2 Reading% +3 Digits) 250V 1V Input impedance: about 4.5MΩ; Frequenc

GDM-350B User Manual 26 DC Current Range Resolution Accuracy 2000µA 1µA ±(1% Reading +2 Digits) 20mA 0.01mA ±(1% Reading + 2 Digits) 200mA 0.1mA ±(

ACCURACY SPECIFICATIONS 27 Resistance Range Resolution Accuracy 200Ω 0.1Ω ±(0.8% Reading + 5 Digits) 2000Ω 1Ω 20kΩ 0.01kΩ 200kΩ 0.1kΩ 2000kΩ 1kΩ 20M

Table of Contents 1 Table of Contents OVERVIEW...

GDM-350B User Manual 28 Temperature Measurement Range Resolution Accuracy -40˚C~ -20˚C 1˚C -(8% Reading + 5 digits) -20˚C~0˚C ± 4 digits > 0˚C~10

ACCURACY SPECIFICATIONS 29 Diode, Transistor Function Range Resolution Remark Diode 1mV Display positive voltage decline Transistor hFE 1 Continu

GDM-350B User Manual 30 MAINTENANCE Warning Make sure the test leads are removed and the power is turned off the meter before opening the cover. G

MAINTENANCE 31 Replacing the Battery and Fuse (see diagram 12) Warning On the LCD display, the battery warning indicator, “ ” indicates the batter

GDM-350B User Manual 32 Operating Steps: 1. Turn the power off and remove the test leads from the meter. 2. Use a screwdri

GDM-350B User Manual 2 OVERVIEW The GDM-350B multimeter is a hand-held 3 1/2digit multimeter with an advanced design, multiple functions and reliabl

OVERVIEW 3 Unpacking & Inspection Open the package case and take out the Meter. Check the following items carefully to see if any parts are mis

GDM-350B User Manual 4 Safety Information This meter complies with the IEC/EN61010-1 standard, pollution degree 2, overvoltage category (CAT III 250

OVERVIEW 5 7. When each measurement has been completed, disconnect the test leads from the DUT and then turn the power off from the meter. Remove t

GDM-350B User Manual 6 International Electrical Symbols Battery has insufficient charge Ground Warning: Refer to the Operating Manual AC (Alter

OVERVIEW 7 Overall Specification 1. Maximum voltage between any terminal and ground: Refer to the different input protection voltage ranges