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DIGITAL HAND-HELD MULTIMETER

Screenshot 2016-06-09 15.58.31 copy

Digital Handheld Multimeter

Product Code: Q9002

The qesta Digital Multimeter is used to measuring DC & AC Voltage, DC & AC current, Resistance Diode, Transistor, Frequency, Temperature, Capacitance and Continuity.

This device includes an LCD Display where measurements can be viewed, Dial (or rotary switch) for selecting primary measurement values, Input Jacks where the test leads are inserted, Data Hold function and a backlit screen.

Features & Specifications

measuring Voltage
Checking Voltage of Battery using qest Digital Handheld Multimeter

• Max Voltage between terminals and earth ground: 1000VDC or 7000VAC
• Fuse Protection: F 200mA/250V
• Power: 9V Battery
• Display: LCD, 1999 Counts, Updates 2-3/seconds
• Measuring Method: Dual-slope integration A/D converter
• Over-range Indication: Only Figure ( 1 ) on the display
• Polarity Indication: ( – ) Displayed for negative polarity
• Operating Environment: 0oC to 50oC
• Low Battery Indication: appears on the display
• Size: 31.5 x 91 x 189mm
• Weight: 290g

______________________________________________________

SAFETY & OPERATING MANUAL

Safety Information:

This multimeter has been designed according to IEC-1010 concerning electronic measuring instruments with an overvoltage category (CAT 2) and Pollution 2.

Follow all safety instructions when operating to ensure that the meter is used safely and is kept in good operating condition. Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary, they must be replaced with the type specified in in this manual.

Safety Symbols:

  • warningImportant safety information, refer to the operating manual
  • dangerous voltageDangerous voltage may be present
  • earthedEarth ground
  •  dobule insualted Double insulation (Protection class 2)

Maintenance:

  • Before opening the casing, always disconnect test leads from all energised circuits.
  • For continued fire protection, replace fuse only with the specified voltage and current ratings: F 200mA/250V (Quick Acting)
  • Never use the digital multimeter unless the back casing is in place and fastened completely
  • Do not use abrasives or solvents on the meter. To clean, use a damp cloth and mild detergent only.

 

During Use:

  • Never exceed the protection limit values indicated in specifications for each range of measurement.
  • When the meter is linked to measurement circuit, do not touch unused terminals.
  • Never use the meter to measure voltages that might exceed 1000V DC or 700V AC above earth ground in category II installations.
  • When the value scale to be measured is unknown beforehand, set the range selector at the highest position. Before rotating the range selector to change functions, disconnect test leads from the circuit under test.
  • When carrying out measurements on TV or switching power circuits always remember that there may be high amplitude voltages pulses at test points, which can damage the meter.
  • Always is careful when working with voltages above 60V de or 30V ac rms. Keep fingers behind the probe barriers while measuring.
  • Before attempting to insert transistors for testing, always be sure that test leads have been disconnected from any measurement circuits.
  • Components should not be connected to the hFE socket when making voltage measurements with test leads.
  • Never perform resistance measurements on live circuits

General Information:

This digital multimeter is a handheld 31/2 digital multimeter for measuring DC and AC Voltage, DC and AC current, Resistance, Diode, Transistor, frequency,temperature,capacitance and Continuity Test with battery operated. The Back light of display is optional.

Specifications:

Accuracy is specified for a period of one year after calibration and at 18 to 28 ·c (64 °F to 82°F) with relative humidity to 80%.

General information:

  • Maximum voltage between terminals and earth ground: 1000V DC or 7000AC
  • Fuse Protection: F200mA/250V
  • Power: 9V DC Battery, NEDA 1604 or 6F22
  • Display: LCD, 1999 counts, updates 2-3/seconds
  • Measuring Method: Dual-slope integration A/D converter
  • Over-range Indication: Only figure ‘1’ on the display
  • Polarity Indication: ‘-‘ Displayed for negative polarity
  • Operating Environment: 0 to 40°C
  • Storage Temperature: -10°C to 50°C
  • Low Battery Indication: battery appears on the display
  • Size: 31.5mm x 91mm x 189mm
  • Weight: Approximately 280g

DC Voltage:

1

Overload Protection: 250V rms, For 200mv range and 1000V DC or rms. AC for other ranges.

AC Voltage:

2

Overload Protection: 250V rms, For 200mv range and 1000V DC or rms. AC for other ranges.

  • Frequency range: 40Hz to 400Hz.
  • Response: Average responding, calibrated in rms. Of a sine wave

 

DC Current:

4

  • Overload protection: 250V DC or rms. ac
  • Overload protection: F 200mA/250V fuse (20A range unfused)

 

AC Current:

5

  • Overload protection: 250V DC or rms. ac
  • Frequency range: 40Hz to 400Hz.
  • Response: Average responding, calibrated in rms. Of sine wave

Resistance:

6

  • Maximum open-circuit voltage: 3.2V
  • Overload protection: 250V DC or rms. AC for all ranges

Frequency:

7

Temperature:

8

Capacitance:

9

Operating Instructions

  1. Connect the red test lead to the “V. Q .mA” jack and the black lead to the “COM” jack.
  2. Set rotary switch at desired DCV position. If the voltage to be measured is not known beforehand, set range switch at the highest range position and then reduce ti until satisfactory resolution is obtained.
  3.  Connect test leads across the source or load. being measured.
  4.  Read voltage value on the LCD display along with the polarity of the red lead connection

AC Voltage Measurement:

  1. Connect the red test lead to”V. Q .mA” jack and the black test lead to the “COM” jack.
  2. Set the rotary switch at desired ACV position. Connect the test leads across the source of load being measured.
  3. Read voltage value on the LCD Display

Resistance Measurement:

    1. Connect the red test lead to”V. Q .mA” jack and the black test lead to the “COM” jack. The polarity of the red lead is positive ( + )
    2. Set the rotary switch at desired ACV position. Connect the test leads across the source of load being measured.
    3. Connect the test leads across the resistor to be measured and read the LCD display
    4. if the resistance being measured is connected to a circuit, turn off the power and discharge all capacitors before applying the test probes.

Diode Test:

  1. Connect the red test lead to”V. Q .mA” jack and the  black test lead to the “COM” jack. (The polarity of the red lead is positive ( + )
  2. Set the rotary switch at “->+” position
  3. Connect the red test lead to the anode of the diode to be tested and the black test lead to the cathode of the diode to be tested. The approximate, forward voltage drop of the diode will be displayed. If the connection is reversed. Only figure 1 will be shown.

 

Transistor Test:

  1. Set the rotary switch at “hFE”position
  2. Determine whether the transistor under testing is NPN or PNP and locate the emitter, base and collector leads. Insert the leads into proper holes of the hFE

    socket on the front panel.

  3. Read the approximate hFE value at the test condition of base current 10 μ A and Vce 3v.

    Note:

    To avoid electrical shock, remove test leads from measurement circuits before testing a transistor.

    Audible Continuity Test:

    1. Connect red test lead to” V, Q”, black test lead to “COM”

    2. Set range switch to wifiPosition.

    3. Connect test leads to two points of circuit to be tested. If continuity exists, built~in buzzer will sound.

    Measuring Temperature

    1. Set the rotary switch at TEMP Position and the LCD display will show the current environment temperature.

    2. Connect the K type thermoelectric couple to “V

    Q. mA “C “and “COM” jacks.

    3. The display will read Temperature Vatue degrees Celsius

Measuring Frequency:

1.Connect the black test lead to the COM jack and the red test lead to the V Q Hz jack.
2.Set the rotary switch at kHz position and connect test leads across the source or load under measurement.

Note:

1.Reading is possible at input voltages above 10 Vrms, but the accuracy is not guaranteed,
2. For noisy environments,it is preferable to use shield cable for measuring small signal.

Measuring Capacitance:

1.Set the rotary switch at desired F position.
2.Before inserting capacitor under measurement into capacitance testing socket.be sure that the capacitor has been discharged fully.
3.When measuring capacitors with shorter leads,a testing adapter is provided with the meter into the capacitance testing socket on the front panel to continue measurements.
4.When testing large capacitance, note that there will be a certain time lag before the final indication.

Warning:

To avoid electric shock,be sure the capacitor measuring adapter has been removed before changing to another function measurement.

Battery and Fuse Replacement:

  1. If” rfl “appears on display, it indicates that the battery should be replaced.
  2. Fuse rarely need replacement and blow almost always as a result of operator’s error.
  3. To replace battery & fuse (200mA/250V)remove the 2 screws in the bottom of the case. Simply remove the old, and replace with a new one.
  4. Be careful to observe battery polarity.

warningWarning:

Before attempting to open the case, always be sure that test leads have been disconnected from measurement circuits.

Close case and tighten screws completely before using the meter to avoid electrical shock hazard.

Accessories

  1. Operator’s instruction manual
  2. Set of test leads
  3. Gift box
  4. 9 volt battery. NEDA 1604 6F22 006P type
  5. Holster (option)
  6. “K” type thermocouple (XB-92068, XB-92088)

FOR THE FUNCTION OF THE PRODUCTS,SEE THE PANEL OF THE DIGITAL MULTIMETERS OF ALL TYPES.

 

 

 

 

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