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Handheld Digital

Multimeter

PRO-50A

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Summary of Contents for PRO-50A

Page 1: ...Handheld Digital Multimeter PRO 50A ...

Page 2: ...eter s operation on a known voltage before using it in general If in doubt have the meter serviced z z Do not apply more than the rated voltage as marked on the meter between terminals or between any terminal and earth ground z z Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes or capacitances z z Do not use the meter around explosive g...

Page 3: ...measuring accuracy Compliance Statements Disposal of Old Electrical Electronic Equipment Applicable in the European Union and other European countries with separate collection systems This product is subject to Directive 2012 19 EU of the European Parliament and the Council of the European Union on waste electrical and electronic equipment WEEE and in jurisdictions adopting that Directive is marke...

Page 4: ...ved from a limited energy transformer or a battery CAT II Measurement instruments whose measurement inputs are meant to be connected to the mains supply at a standard wall outlet or similar sources CAT III Measurement instruments whose measurement inputs are meant to be connected to the mains installation of a building CAT IV Measurement instruments whose measurement inputs are meant to be connect...

Page 5: ...easurements 9 3 Resistance Measurements 11 4 Diode Measurements 12 5 Continuity Test 13 6 Capacitance Measurements 14 7 Transistor Gain Measurements 15 8 Temperature Measurements 15 9 Frequency Measurements 16 10 Auto Power Off 16 11 Data Hold Mode 17 12 Non Contact AC Voltage Detection 17 5 Specifications 17 1 General Specifications 17 2 Measurement Specifications 18 6 Maintenance 21 1 Cleaning 2...

Page 6: ...t up to 10 A z z Frequency measurements z z Temperature measurements 2 Package Contents Please inspect the instrument mechanically and electrically upon receiving it Unpack all items from the shipping carton and check for any obvious signs of physical damage that may have occurred during transportation Report any damage to the shipping agent immediately Save the original packing carton for possibl...

Page 7: ...globalspecialties com 6 3 Product Description 1 Front Panel 1 2 3 4 5 6 7 8 9 10 11 Figure 1 Front Panel Diagram ...

Page 8: ... it using the black test lead 6 VΩHz The positive input terminal for voltage ohms frequency and diode measurements Connection is made using the red test lead 7 Function Range Rotary Switch Selects the function and desired range 8 Backlight Press to activate LCD backlight 9 HOLD Displays the current value on the display even if the leads are removed from device under test Pressing the button again ...

Page 9: ...d measurement function Ensure proper insertion of the test leads so they correspond with the type of measurement you wish to perform When connecting the test leads to the circuit or device connect the COM test lead black before connecting the live lead red When removing the test leads remove the live lead first WARNING To avoid electric shock injury or damage to the meter disconnect circuit power ...

Page 10: ... To avoid personal injury or damage to the meter z z Never attempt to make in in circuit current measurement when the open circuit potential to earth is 600 V z z Check the meter s fuse before testing z z Use the proper terminals switch position and range for your measurement z z Never place the probes in parallel with a circuit or component when the leads are plugged into the current terminals Th...

Page 11: ...urn on the power of the measured circuit and read the display Be sure to note the measurement units at the right side of the display mA or A When only the figure 1 is displayed it indicates an overrange situation and the higher range has to be selected 5 Turn off the power of the measured circuit and discharge any high voltage capacitors Remove the test leads and reconnect the test circuit Figure ...

Page 12: ...t 2 Connect the red test lead to the VΩH input 3 Probe with the test leads to the DUT and record the measured reading on display 10A COM mAhFE TEMP VΩHz Resistance Figure 6 Connection for Resistance Measurement WARNING Do not apply more than 1000 V DC across the terminals or they will be damaged Tips for resistance measuring z z The measured value of a resistor in a circuit is often different from...

Page 13: ...and 0 8 V CAUTION Always connect the test leads to the instrument inputs first before connecting the DUT to avoid potential shock hazard Follow these steps to make conduct a diode test 1 Set the rotary switch to the diode range 2 Connect the black test lead to the COM input 3 Connect the red test lead to the VΩHz input 4 For forward bias readings on any semiconductor component place the red test l...

Page 14: ... for open shorts of the circuit The beeper sounds if a circuit is complete To test for continuity 1 Set the rotary switch to the continuity range 2 Connect the black test lead to the COM input 3 Connect the red test lead to the VΩHz input 4 Connect the test leads to the resistance in the circuit being measured 5 When the test lead to the circuit is below 30 Ω a continuous beep will sound thus indi...

Page 15: ...acitors before measuring capacitance Use the DC voltage function to confirm that the capacitor is discharged CAUTION Always connect the test leads to the instrument inputs first before connecting the DUT to avoid potential shock hazard Follow these steps to make a capacitance measurement 1 Connect the black test lead to the COM input This will connect to the negative side of your capacitor 2 Conne...

Page 16: ...measurements 1 Set the rotary switch to hFE range 2 Connect the COM plug and plug of the special multi function socket to the COM and hFE terminals respectively on the meter 3 Determine whether the transistor to be tested is NPN or PNP type and locate the emitter base and collector leads 4 Insert leads of the transistor into the proper holes of the special multi function socket c for collector b f...

Page 17: ...ed reading in C from the display 9 Frequency Measurements WARNING To avoid electrical shock hazard and or damage to the instrument do not measure frequency on high voltage 250 V Follow these steps to make a frequency measurement 1 Turn the rotary switch to the frequency range 20kHz 2 Connect the black test lead to the COM input 3 Connect the red test lead to the VΩHz 4 Connect the test leads to th...

Page 18: ...en there is no indication voltage may still exist Do not rely on the non contact voltage detector with shielded wire Detection operation may be subject to socket design insulation thickness and type 5 Specifications 1 General Specifications z z Display 3 digit LCD with automatic indication of functions and symbols z z Polarity Automatic negative polarity indication z z Overrange Indication LCD wit...

Page 19: ...00 V 100 mV 1000 V 1 V 0 8 of rdg 2 digit Input Impedance 10 MΩ Max Input Voltage 250 VDC or ACrms for 200 mV range and 1000 VDC or 750 ACrms for other ranges b AC Voltage Range Resolution Accuracy 2 V 1 mV 0 8 of rdg 3 digits 20 V 10 mV 200 V 100 mV 750 V 1 V 1 2 of rdg 3 digits Input Impedance 10 MΩ Max Input Voltage 250 VDC or ACrms for 200 mV range and 1000 VDC or 750 ACrms for other ranges Fr...

Page 20: ... A ACrms for 10 A range For measurements 5 A 10 seconds maximum ON to measure 1 minute OFF Above 10 A unspecified Response Average calibrated in rms of sine wave e Resistance Range Resolution Accuracy 200 Ω 0 1 Ω 0 8 of rdg 3 digits 2 kΩ 1 Ω 0 8 of rdg 1 digit 20 kΩ 10 Ω 200 kΩ 100 Ω 2 MΩ 1 kΩ 20 MΩ 10 kΩ 1 0 of rdg 2 digits 200 MΩ 0 1 MΩ 5 0 of rdg 10 digits Overload protection 250 VDC or 250 VAC...

Page 21: ... C 2 0 of rdg 3 digits 401 C to 1000 C 2 0 of rdg 5 digits Overload Protection Fuse FF 400mA 1000V Temperature specifications do not include thermocouple errors j Frequency Range Resolution Accuracy 20 kHz 10 Hz 1 5 of rdg 5 digits Overload Protection 250 VDC or 250 VACrms Input Voltage Range 200 mV to 10 VACrms k Transistor Function Description Test Condition hFE Display reads approx hFE value 0 ...

Page 22: ...brasive cleaning agents 2 Battery and Fuse Replacement WARNING To avoid electrical shock disconnect the test leads and any input signals before replacing the battery Replace only with same type of battery 1 Disconnect test leads from any live source turn the rotary switch to OFF and remove the test leads from the input terminals 2 The battery case is secured to the main case by 1 screw Using a Phi...

Page 23: ...discontinue models change specifications price or design of this device at any time without notice and without incurring any obligation whatsoever The purchaser agrees to assume all liabilities for any damages and or bodily injury which may result from the use or misuse of this device by the purchaser his employees or agents This warranty is in lieu of all other representations or warranties expre...

Page 24: ...20160203 ...

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