Acrobat Distiller, Job 4
Contents
1. e Never exceed the limit value for protection This limit value is listed separately in the specifications for each range of measurement e Do not touch unused terminals when the meter is linked to a circuit which is being tested e Never use the meter with category II installations when measuring voltages that might exceed the safety margin of 600V above earth ground e Set the range selector at its highest position if the intensity of the charge to be measured is unknown beforehand e Disconnect the test leads from the tested circuit before rotating the range selector in order to change functions e When carrying out measurements on a TV set or switching power circuits always remember that the meter may be damaged by any high amplitude voltage pulses at test points e Always be careful when working with voltages above 60Vdc or 30Vac rms Keep your fingers behind the probe barriers at all times during measurement e Before attempting to insert transistors for testing always verify if the test leads have been disconnected e Components should not be connected to the hFE socket while test leads are being used to execute voltage measurements e Never perform resistance measurements on live circuits DVM850BL 2 GB 4 GENERAL DESCRIPTION The device is a battery operated hand held 3 Le digital multimeter for measuring DC and AC voltages DC current and resistance It also offers the possibility of executing continuity tests and of testin2. A vellemen components DVM850BL a Li h NPN PNP 1010 S CATII 600V O ONL MAX 600V unfused See 200MA MAX 10A DC COM VOmA User Manual Gebruikershandleiding Manuel d utilisation Gebrauchsanleitung 1 SAFETY 1 1 SAFETY INFORMATION This multimeter has been designed in accordance with IEC 1010 This norm pertains to electronic measuring instruments that emit pollution 2 and belong to an overvoltage category CAT I Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good running order Full compliance with safety standards can only be guaranteed when the buyer uses the test leads supplied with this packaging If necessary they should be replaced with identical leads 1 2 SAFETY SYMBOLS Important safety information refer to the user manual Dangerous voltage is possible DD Earthing gt Double insulation class II protection Fuse should be replaced the rating is specified in the manual 2 MAINTENANCE e Before opening the case always disconnect the test leads from all live circuits e Avoiding fire risks respect the specified voltage and current ratings when replacing the fuse F 200mA 250V Quick acting e Do not use the device unless the back cover is in place and securely fastened e Do not apply abrasives or solvents to the meter Use a damp cloth and mild detergent for cleaning purposes DVM850BL 1 GB 3 DURING USE
3. simply remove the 2 screws at the back of the case Remove the old specimen and insert the new one Please remember to observe battery polarity 8 WARNING A Before attempting to open the case verify if the test leads have been disconnected Before using the meter please remember to close the case and tighten the screws properly in order to avoid electroshocks 9 ACCESSORIES User manual Set of test leads Gift box 9V battery Holster DVM850BL 8 GB
4. esistance being measured is connected to a circuit turn off the power and discharge all capacitors before applying the test probes 6 5 DIODE TEST 1 Connect the red test lead to VQmA jack and the black one to the COM jack the red lead has a positive polarity 2 Set the rotary switch in the PF 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 The approx forward voltage drop of the diode will be displayed If the connection is reversed the display will merely show a 1 6 6 TRANSISTOR TEST 1 Set the rotary switch in the 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 the proper holes of the hFE socket on the front panel 3 Read the approximate hFE value obtained under the following test conditions a base current of 10uA and Vce 3V DVM850BL 7 GB 6 7 AUDIBLE CONTINUITY TEST 1 Connect the red test lead to VQmA and the black one to COM 2 Set the range switch in the re position 3 Connect the test leads to two points of the circuit to be tested If continuity exists the built in buzzer will sound 7 BATTERY amp FUSE REPLACEMENT When is displayed the battery should be replaced Fuses rarely need replacement and blown fuses almost always result from human error To replace the battery or fuse 200mA 250V
5. g diodes and transistors The back light is optional 4 1 FRONT PANEL J hFE ECBE NPN PNP 200mA MAX COM VOmA DVM850BL 3 GB 4 2 FRONT PANEL DESCRIPTION O Display 3 2 digits 7 segments LCD 15mm high Back light When this button is pushed the back light will illuminate your display for approximately 5 seconds Rotary switch This switch is used to select functions and desired ranges as well as to turn the meter on off Hold button Upon pushing this button the display will retain the last reading and the E symbol will remain on the LCD until the button is pushed again 10A jack Insert the red test lead in this connector in order to measure a max current of 10A COM jack Insert the black negative test lead VQmA jack Insert the red positive test lead in this connector to measure voltage resistance and current except 10A 5 SPECIFICATIONS Maximum accuracy is achieved during a one year period after calibration The ideal set of circumstances requires a temperature of 18 to 28 C 64 F to 82 F with a maximum relative humidity of 80 Maximum voltage between terminals and earth ground CAT II 600V Fuse protection F 200mA 250V Power 9V battery Display LCD 1999 counts updates 2 3 sec Measuring method Dual slope integration A D converter Overrange indication Only figure 1 on the display Polarity indication displayed for negative polarity Operating temperature 0
6. jack 2 Set the rotary switch in the desired DCV position If the voltage to be measured is unknown beforehand you should set the range switch in the highest range position and then reduce gradually until the ideal resolution is obtained 3 Connect the test leads to the source being measured 4 Read the voltage value on the LCD display along with the polarity of the red lead connection 6 2 DO CURRENT MEASUREMENT 1 Connect the red test lead to the VQmA jack and the black test lead to the COM jack switch the red lead to the 10A jack for measurements between 200mA and 10A 2 Set the rotary switch DCA in the desired position 3 Open the circuit in which the current is to be measured and connect the test leads to the circuit IN SERIES 4 Read the current value and the polarity of the red lead connection on the LCD display DVM850BL 6 GB 6 3 AC VOLTAGE MEASUREMENT 1 Connect the red test lead to the VQmA jack and the black test lead to the COM jack 2 Set the rotary switch in the appropriate ACV position 3 Connect the test leads to the source to be measured 4 Read the voltage value on the LCD display 6 4 RESISTANCE 1 Connect the red test lead to the VQmA jack and the black test lead to the COM jack the red lead has a positive polarity 2 Set the rotary switch in the appropriate Q range position 3 Connect the test leads to the resistor to be measured and read the LCD display 4 If the r
7. to 40 C Storage temperature 10 C to 50 C Low battery indication appears on the display Dimensions 138 x 69 x 31mm Weight Approx 170g DVM850BL 4 GB 5 1 DC VOLTAGE 0 5 of rdg 2 digits 0 5 of rdg 2 digit 0 5 of rdg 2 digits 200V 100mV 0 5 of rdg 2 digits 600V 0 8 of rdg 2 digits Overload protection 250Vrms for the 200mV range and 600Vdc or rms ac for other ranges 5 2 DC CURRENT Overload protection F 200mA 250V fuse no fuse for the 10A range 5 3 AC VOLTAGE 200V 100mV 1 2 of rdg 2 digits 600V 1 2 of rdg 2 digits Overload protection 600Vdc or rms ac for all ranges Frequency range 40Hz to 400Hz Response average calibration in rms of a sine wave 5 4 DIODE amp CONTINUITY el If continuity exists about less that 1 5kQ built in buzzer will sound Displays the diode s approx forward voltage drop Overload protection 250Vdc or rms ac DVM850BL 5 GB 5 5 RESISTANCE 0 8 of rdg 2 digits aa a 0 8 of rdg 2 digits 20kQ Im 0 8 of rdg 2 digits 200kQ 100Q 0 8 of rdg 2 digits 1 0 of rdg 2 digits Maximum open circuit voltage 3 2V Overload protection 250Vdc or rms ac for all ranges 9 6 TRANSISTOR hFE TEST 0 1000 Tested voltage NPN amp PNP 0 1000 Ib 104A Ved 3V 6 OPERATING INSTRUCTIONS 6 1 DC VOLTAGE MEASUREMENT 1 Connect the red test lead to the VQmA jack and the black lead to the COM
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