User manual VELLEMAN DVM850BL

[. . . ] Use a damp cloth and mild detergent for cleaning purposes. DVM850BL 1 GB 3. This limit value is listed separately in the specifications for each range of measurement. · Do not touch unused terminals when the meter is linked to a circuit which is being tested. · Never use the meter with category II installations when measuring voltages that might exceed the safety margin of 600V above earth ground. [. . . ] Hold button Upon pushing this button, the display will retain the last reading and the " "-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. "VmA" 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 Fuse protection Power Display Measuring method Overrange indication Polarity indication Operating temperature Storage temperature Low battery indication Dimensions Weight CAT II 600V F 200mA / 250V 9V battery LCD, 1999 counts, updates 2-3/sec. Dual-slope integration A/D converter Only figure "1" on the display "-" displayed for negative polarity 0 to 40°C -10°C to 50°C " " appears on the display 138 x 69 x 31mm Approx. DC VOLTAGE Range Resolution Accuracy 200mV 100µV ±0. 5% of rdg ± 2 digits 2V 1mV ±0. 5% of rdg ± 2 digits 20V 10mV ±0. 5% of rdg ± 2 digits 200V 100mV ±0. 5% of rdg ± 2 digits 600V 1V ±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 Range Resolution Accuracy 200ùA 0. 1µA ±1% of rdg ± 2 digits 2mA 1µA ±1% of rdg ± 2 digits 20mA 10µA ±1% of rdg ± 2 digits 200mA 100µA ±1. 5% of rdg ± 2 digits 10A 10mA ±3% of rdg ± 2 digits Overload protection : F 200mA / 250V fuse. AC VOLTAGE Range Resolution Accuracy 200V 100mV ±1. 2% of rdg ± 2 digits 600V 1V ±1. 2% of rdg ± 2 digits Overload protection : 600Vdc or rms ac for all ranges. DIODE & CONTINUITY Range Description If continuity exists (about less that 1. 5k), 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 Range Resolution 200 0. 1 2k 1 20k 10 200k 100 2M 1k Maximum open circuit voltage : 3. 2V Overload protection : 250Vdc or rms ac for all ranges. Accuracy ±0. 8% of rdg ± 2 digits ±0. 8% of rdg ± 2 digits ±0. 8% of rdg ± 2 digits ±0. 8% of rdg ± 2 digits ±1. 0% of rdg ± 2 digits 5. 6. TRANSISTOR hFE TEST (0-1000) Range NPN & PNP Tested range 0-1000 Tested current Ib = 10µA Tested voltage Vcd = 3V 6. Connect the red test lead to the "VmA" jack and the black lead to the "COM" jack. 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. Read the voltage value on the LCD display along with the polarity of the red lead connection. 6. 2. [. . . ] Insert the leads into the proper holes of the hFE-socket on the front panel. Read the approximate hFE-value obtained under the following test conditions : a base current of 10µA and Vce 3V. DVM850BL 7 GB 6. 7. Connect the red test lead to "VmA" and the black one to "COM". BATTERY & FUSE REPLACEMENT When" " is displayed, the battery should be replaced. [. . . ]