Conrad VC940 Operating Manual
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Conrad VC940 Operating Manual

Conrad VC940 Operating Manual

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Model VC940: OPERATING MANUAL
Chapter
Title
1
Before You Start
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
2
3
H.
Measuring Temperature
I.
4~20mA loop current as % readout
J.
Power Measurement
4
Sleep Mode
5
6
C.
Replacing the Battery
7
I.
J.
Temperature
K.
4~20mA loop current
Page
1

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  • Page 1: Table Of Contents

    Model VC940: OPERATING MANUAL Table of Contents Chapter Title Page Before You Start Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols Getting Acquainted Turning the Meter On Battery Considerations Automatic Power Off Automatic Backlight Off Low Battery Indication...
  • Page 2 Model VC940: OPERATING MANUAL List of Tables Table Title Page Unpacking Inspection International Electrical Symbols Rotary Switch Selections Functional Buttons Functions Vs Displays Display Features Setup Selections...
  • Page 3 Model VC940: OPERATING MANUAL List of Figures Figure Title Page Meter Structure Display Features Voltages Measurement Currents Measurement Resistance Measurement Continuity Test Diode Test Capacitance Measurement Frequency / Duty Cycle Measurement Temperature Measurement Power Measurement Fuse Replacement Battery Replacement...
  • Page 4 To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter. Digital Multimeter VC940 (hereafter referred to as “the Meter”) is a 39999 counts and 4 3/4 digits with steady operations, fashionable structure and auto ranging instrument. The Meter has analog bar graph, ACV &...
  • Page 5 Model VC940: OPERATING MANUAL Table 1-2. International Electrical Symbols AC or DC Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Conforms to Standards of European Union...

  • Page 6: Getting Acquainted

    Model VC940: OPERATING MANUAL Chapter 2 Getting Acquainted Turning the Meter On To turn the Meter on, turn the rotary switch from OFF to any switch setting. Battery Considerations The Meter uses one 9V Battery (NEDA 1604, 6F22, 006P). The following paragraphs describe several techniques used to conserve battery power.

  • Page 7: Functional Buttons

    Model VC940: OPERATING MANUAL Functional Buttons The buttons activate features that augment the function selected with the rotary switch. The buttons are shown in Table 2-2. Press the button once to access the main feature (e.g. STORE). To access the first additional feature of the button (e.g. RECALL), press and hold the button for over 1 second to access this additional feature. This additional feature appears right above or on the left hand side of the appropriate keys.

  • Page 8: The Meter Functions Vs Displays

    Model VC940: OPERATING MANUAL Use the blue button to select any rotary switch alternate Press the button once function (labeled in blue letters). Press and hold the Button while turning on the Meter to toggle to 4000 counts. It is faster when the Meter is at 4000 counts measurement mode.

  • Page 9: Analogue Bar Graph

    Model VC940: OPERATING MANUAL Ω: Ohm. The unit of resistance. Ω, kΩ, MΩ kΩ:Kilohm. 1×10 or 1000 ohms MΩ:Megaohm. 1×10 or 1,000,000 ohms Hz : Hertz. The unit of frequency in cycles/second. Hz, kHz, kHz: Kilohertz. 1×10 or 1000 hertz MHz: Megahertz, 1×10...

  • Page 10: Making Measurements

    Model VC940: OPERATING MANUAL Chapter 3 Making Measurement Introduction Chapter 3 explains how to make measurements. Most measurement functions can be selected by using the rotary switch. While letters or symbols identify primary functions; blue letters or symbols identify alternative functions. Press the BLUE button to access these alternate functions.

  • Page 11: Measuring Resistance

    Model VC940: OPERATING MANUAL When the measured current is between 5A-10A, continuous measurement ≤ 10 seconds and interval more than 15 minutes. When current measurement has been completed, disconnect the connection between the testing leads and the circuit under test and remove testing leads away from the input terminals of the Meter.

  • Page 12: Measuring Capacitance

    Model VC940: OPERATING MANUAL Black Figure 3-5. Diode Test Warning To avoid harms to you, please do not attempt to input voltages higher than 60V DC or 30V rms AC. To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before testing diodes.
  • Page 13 Model VC940: OPERATING MANUAL Black Figure 3-7. Frequency / Duty Cycle Measurement Warning To avoid harms to you, please do not attempt to input voltage higher than 30V rms. To measure frequency and duty cycle, connect the Meter as Figure 3-7 and do the following: Insert the red test lead into the Hz terminal and the black test lead into the COM terminal.
  • Page 14 Model VC940: OPERATING MANUAL A = Plug to the outlet B= Outlet of the power adaptor C = Power Adaptor Figure 3-9. Power Measurement Warning To avoid damages to the Meter, please do not attempt to input higher than 250V from outlet altogether reading may be obtained.

  • Page 15: Using Stores, Recall And Send Features

    Model VC940: OPERATING MANUAL Chapter 4 Using Stores, Recall & Send Features Introduction Chapter 4 shows you how to use stores, recall and communication features available on the Meter Storing and Clearing Readings To store readings, proceed as follows: Press STORE once, STO and no appears to confirm the operation and the left secondary display shows the current measurement reading. Press to toggle between clearing the stored readings and start from the zero readings or start from the last stored reading.

  • Page 16: Changing The Default Setting

    Model VC940: OPERATING MANUAL Chapter 5 Changing the Default Setting Introduction The Meter allows you to change the default operating configuration of the Meter by changing setup options made at the factory. These settings are stored and can be changed in the Setup mode using the procedure described in this chapter.

  • Page 17: Maintenance

    Model VC940: OPERATING MANUAL Chapter 6 Maintenance This chapter provides basic maintenance information including battery and fuse replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 18: Specifications

    Model VC940: OPERATING MANUAL Chapter 7 Specifications Safety and Compliances Maximum Voltage Refer to different range input protection voltage between any Terminal and Grounding Certification Compliances IEC 61010 CAT.III1000V, CAT.IV600V overvoltage and double insulation standard 0.5A, 250V, fast type fuse, ø5×20mm Fused Protection for µAmA input terminal:...

  • Page 19: Dc Current

    Model VC940: OPERATING MANUAL Around 2.5GΩ 400mV 0.01mV ±(0.025%+8) 0.0001V 1000V 0.001V ±(0.05%+5) Around 10MΩ 400V 0.01V 1000V 0.1V B. AC Voltage (AC+DC measurement is available) Accuracy Range Resolution Bandwidth Accuracy 45Hz~1kHz ±(0.5%+5) 1kHz~10kHz ±(0.8%+8) 0.0001V 10kHz~120kHz ±(3%+8) 120kHz~250kHz ±(4%+8) 250kHz~400kHz ±(10%+50)

  • Page 20: Diode Test

    Model VC940: OPERATING MANUAL Range Resolution Overload Protection 0.01Ω 1000V Remarks: Open circuit voltage approximate -1.2V. The buzzer does not sound when the test resistance is >50Ω. The beeper comes on continuously for open conditions, that is test resistance is ≤ 50Ω.
  • Page 21 Model VC940: OPERATING MANUAL...

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