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12

GMC-I Messtechnik GmbH

4.3

Diode and Transistor Test

The resistance range

Ω

x 1000 is suited for a rough func-

tional check on semiconductor elements. A resistance
measurement is an easy way to find a short circuit or an
interruption on a diode and/or a diode junction between
base, collector and emitter. The polarity of a diode and the
base connection of a transistor can also be determined by
this test.
This measurement does not destroy semiconductor ele-
ments to be tested as the 1.75 V voltage and the 100

μ

A

current are not exceeded.

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Содержание METRAmax 6

Страница 1: ...Operating instructions METRAmax 6 Analog Multimeter 3 348 602 02 6 10 15 ...

Страница 2: ...ing Controls 1 Range selector switch 2 Rotary knob to adjust the full scale deflection 3 Socket connectors 4 Battery compartment 5 Nose to open the meter 6 Adjustment screw for the mechanical zero on black scale 6 1 2 3 5 4 1 5 V R6 ...

Страница 3: ...d 10 4 1 2 Measuring in the Ranges up to 1 MΩ Ω x 1 10 100 1000 black 10 4 2 Rough Capacitance Measurement 11 4 3 Diode and Transistor Test 12 4 4 Acoustic Continuity Test 13 5 End of Measurement 13 6 Characteristic Values 14 7 Maintenance 16 7 1 Battery 16 7 2 Fusible Link 16 7 2 1 Fuse Replacement 16 7 3 Housing 17 7 4 Device Return and Environmentally Compatible Disposal 17 8 Repair and Replace...

Страница 4: ...structions thoroughly and carefully before placing the METRAmax 6 into service and that you follow all instruc tions contained therein Observe the following safety precautions The instrument may only be operated by persons who are capable of recognizing contact hazards and taking the appropriate safety precautions Contact hazards exist anywhere where voltages of greater than 30 V may occur effecti...

Страница 5: ...enmetrawatt com by entering the search term WEEE Measuring Categories and their Significance per IEC 61010 1 The measuring category and the maximum rated voltage which is printed on the device apply to your measuring instrument 300 V CAT III CAT Definition I Measurements in electrical circuits which are not directly connected to the mains e g electrical systems in motor vehicles and aircraft batte...

Страница 6: ...s and shocks The scale is mirror backed for exact reading of the mea sured values The measuring range Ω x 1 marked in red and the scale marked in red are provided for measurements of small resistance values 0 05 Ω bis 50 Ω To measure higher resistance values there are 4 measuring ranges which have a common black scale A part of the two scale arcs is boldly marked The measur ing error referred to t...

Страница 7: ... requires removal of the lower part of the case Attention Disconnect the measurement cables from the measuring circuit before opening the meter Press the nose 5 on the rear of the meter inwards using an adequate tool and remove the lower part Insert a leakproof 1 5 V mignon cell according to IEC R6 into the battery compartment 4 paying attention to the polarity markings Verify that reliable contac...

Страница 8: ...viations with the adjusting screw 6 on the rear of the meter with a screwdriver if required 3 3 Battery Test Set the range selector switch 1 to the Ω x 1 position red marking With the rotary knob 2 adjust the movement pointer on the red scale to full scale deflection If the pointer can no longer be adjusted to full scale deflec tion or if the indication is instable after the adjustment the battery...

Страница 9: ... Characteristic Val ues If possible select the measuring range in such a way that indication is in the range of the boldly drawn scale arc The measuring error referred to the actual resistance value is smallest in this range During prolonged resistance measurements occasionally check for full scale deflection 0 Ω or When switching the range selector switch 1 to another resistance range always chec...

Страница 10: ...g in the Ranges up to 1 MΩ Ω x 1 10 100 1000 black Set the range selector switch 1 to one of the measur ing ranges Ω x 1 Ω x 1000 depending upon the re sistance value to be measured Short circuit the measuring leads With the rotary knob 2 set the pointer to full scale deflection 0 Ω on the black scale Connect the resistance RX to be measured to the mea suring leads and read the resistance value on...

Страница 11: ...alue to be measured Capacitance is measured according to the ballistic method Connect the capacitor a few times to the mea suring leads with changing polarity and read the largest pointer deflection on the μF scale With this method the capacitance of the capacitor to be measured can only roughly be determined The measured value can deviate from the actual value by up to 25 ...

Страница 12: ...surement is an easy way to find a short circuit or an interruption on a diode and or a diode junction between base collector and emitter The polarity of a diode and the base connection of a transistor can also be determined by this test This measurement does not destroy semiconductor ele ments to be tested as the 1 75 V voltage and the 100 μA current are not exceeded ...

Страница 13: ...ring the measure ment The forward direction of semiconductor elements should not be tested by the audible continuity test but only according to the deflection method see chapter 4 3 When using the audible continuity test inductive voltage spikes appear at the meter connectors which could dam age the semiconductors 5 End of Measurement After the measurement the range selector switch 1 should be set...

Страница 14: ... boldly marked scale arc Reference Conditions Ambient temperature 20 C Position of use horizontal Resistance Measuring Range Span Mid scale Value Ri Max Measuring Current Imax 1 approx Ω x 1 red scale 0 05 Ω 50 Ω 1 Ω 75 mA Ω x 1 1 Ω 1 kΩ 20 Ω 75 mA Ω x 10 10 Ω 10 kΩ 200 Ω 7 5 mA Ω x 100 100 Ω 100 kΩ 2 kΩ 0 75 mA Ω x 1000 1 kΩ 1MΩ 20 kΩ 0 075 mA Capacitance Measuring Range Measuring Range Span Max ...

Страница 15: ...al Safety Protection class II per IEC 61010 1 EN 61010 1 VDE 0411 1 Measuring category CAT III 300 V max Contamination degree 2 Test voltage 2 kV EMC Electromagnetic compatibility Interference emission interferene immunity EN 61326 1 Mechanical Design Protection Housing IP50 terminals IP20 Extract from table on the meaning of IP codes Dimensions 100 mm x 140 mm x 35 mm Weight approx 0 3 kg without...

Страница 16: ...r the specified fuse 7 2 1 Fuse Replacement Disconnect the meter from the measuring circuit Remove the lower part of the case see chapter 3 1 on page 7 Changing the fuse it is possible to put the holder care fully to side or to desolder it Attention Please make definitely sure that only the specified fuse is inserted Using a fuse with other cut out characteristics other nominal current or other sw...

Страница 17: ...ify our electrical and electronic devices in accordance with WEEE 2012 19 EU and ElektroG with the symbol shown to the right per DIN EN 50419 These devices may not be disposed with the trash Please contact our service department regarding the return of old devices see chapter 8 on page 18 If you use batteries or rechargeable batteries in your instru ment or accessories which no longer function pro...

Страница 18: ...service gossenmetrawatt com www gmci service com This address is only valid in Germany Please contact our representatives or subsidiaries for ser vice in other countries DAkkS Calibration Laboratory for Electrical Quantities D K 15080 01 01 accredited per DIN EN ISO IEC 17025 Accredited measured quantities direct voltage direct current values DC resistance alternating voltage alternating current v...

Страница 19: ...offer a complete range of expertise in the field of metrology from test reports and proprietary calibration certifi cates right on up to DAkkS calibration certificates Our spectrum of offerings is rounded out with free test equipment management An on site DAkkS calibration station is an integral part of our service department If errors are discovered during calibration our specialized personnel ar...

Страница 20: ...bH Südwestpark 15 90449 Nürnberg Germany Phone 49 911 8602 111 Fax 49 911 8602 777 E Mail info gossenmetrawatt com www gossenmetrawatt com 9 Product Support When you need support please contact GMC I Messtechnik GmbH Product Support Hotline Phone 49 911 8602 0 Fax 49 911 8602 709 E Mail support gossenmetrawatt com ...

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