Testing Transistor; Continuity Test; Specifications - Velleman DVM98 Manual

3.7 Testing transistor

1. Set the rotary switch at hFE position.
2. Determine whether the transistor to be tested is NPN or PNP type and locate
the Emitter, Base and Collector leads. Insert leads of the transistor into
proper holes of the transistor testing socket.
3. The meter will show the approx. hFE value at test condition of base current
10µA and Vce 3.2V.

3.8 Continuity test

1. Connect the black test lead to the COM jack and the red test lead to the V Ω
Hz jack. (The polarity of the red lead is positive "+").
2. Set the rotary switch at
of the circuit under testing. If continuity exists (i.e. , resistance less than
about 50Ω), built - in buzzer will sound.

4. Specifications

Accuracy is specified for a period of one year after calibration and at 18°C to
28°C (64°F to 82°F) with relative humidity to 80%.
Accuracy specifications are given as :
+ % of reading + number of least significant digits.
4.1 General
MAXIMUM VOLTAGE BETWEEN
TERMINALS AND EARTH GROUND
FUSE PROTECTION
POWER SUPPLY
DISPLAY
MEASURING METHOD
OVERRANGE INDICATION
POLARITY INDICATION
OPERATING TEMPERATURE
STORAGE TEMPERATURE
LOW BATTERY INDICATION
SIZE (H x W x L)
WEIGHT
position and connect test leads across two points
1000 V DC or 700 V rms AC (sine)
mA:F 200mA/250V (A : unfused)
9V battery
LCD, 19999 counts, updates 2-3/sec
Dual-slope integration A/D converter
"1" figure only on the display
"-" displayed for negative polarity
0°C to 40°C (32°F to 104°F)
-10°C to 50°C (14°F to 122°F)
"
31.5mm x 91mm x 189mm
310g (including battery)
" appears on the display