User manual VELLEMAN DVM850BL

[. . . ] F 200mA / 250V (Quick acting) · Do not use the device unless the back cover is in place and securely fastened. · 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 · Never exceed the limit value for protection. [. . . ] 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. Response : average, calibration in rms of a sine wave. 5. 4. 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. 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. Connect the test leads to the source being measured. Read the voltage value on the LCD display along with the polarity of the red lead connection. 6. 2. Connect the red test lead to the "VmA" jack and the black test lead to the "COM" jack (switch the red lead to the "10A" jack for measurements between 200mA and 10A). Set the rotary switch (DCA) in the desired position. Open the circuit in which the current is to be measured and connect the test leads to the circuit IN SERIES. Read the current value and the polarity of the red lead connection on the LCD display DVM850BL 6 GB 6. 3. Connect the red test lead to the "VmA" jack and the black test lead to the "COM" jack. [. . . ] If continuity exists, the builtin buzzer will sound. 7. BATTERY & 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), simply remove the 2 screws at the back of the case. [. . . ]