Cleaning And Maintenance; Technical Specifications - Velleman DVM68 Bedienungsanleitung

7.6 Transistor Test
Do not perform transistor measurements on live circuits.
•
Set the function switch at hFE position.
•
Identify whether the transistor is NPN or PNP type and locate emitter, base and collector lead. Identify whether the transistor is NPN or PNP type and locate emitter, base and collector lead.
•
Insert leads of the transistor to be tested into proper holes of the testing socket on the front Insert leads of the transistor to be tested into proper holes of the testing socket on the front
panel.
•
LCD display will show the approximate hFE value at the test condition of base current 10 A
and Vce 3.2V.

8. Cleaning and maintenance

Do not replace internal parts yourself. Replace damaged or lost accessories by identical replace internal parts yourself. Replace damaged or lost accessories by identical
ones with the same specifications. Order spare accessories e.g. test probes at your deale ones with the same specifications. Order spare accessories e.g. test probes at your dealer.
Switch off the meter and remove test leads prior to replacing the battery or fuses.
WARNING: To avoid electrical shock always disconnect the test leads prior to opening
the housing.
Remark: refer to the warning on the back of the meter
a. General mainenance:
•
Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol or solvents.
b. Fuse Replacement
•
Remove test probes from the circuit under test. Remove the test probes from the input jacks. Remove test probes from the circuit under test. Remove the test probes from the input jacks.
•
Switch off the multi-meter.
•
Remove the 3 screws at the back and gently open the meter.
•
Remove the fuse from the fuse holder and replace it with a new fuse of the same type and Remove the fuse from the fuse holder and replace it with a new fuse of the same type and
with the same specifications (F300mA/250V, Ø5x20mm – F10A/250V, Ø6
•
Close the meter carefully.
c. Battery Replacement
•
Remove the battery as soon as the "
•
Remove test probes from the circuit under test. Remove all test leads from the input jacks.
•
Switch off the multi-meter.
•
Remove the 3 screws at the back and gently open the meter.
•
Replace the battery by a new battery of the same type and with the same specifications Replace the battery by a new battery of the same type and with the same specifications
(6LR61/6F22 9V alkaline, do not use rechargeable batteries)
•
Close the meter carefully
Notes:
Never open the housing when test leads are connected to the input jacks
o
Do not try to repair or calibrate the meter yourself; contact your dealer. Do not try to repair or calibrate the meter yourself; contact your dealer.
o
Replace damaged accessories immediately; order them at your local dealer. Replace damaged accessories immediately; order them at your local dealer.
o
Do not use the meter when it is damaged.
o

9. Technical specifications

This device is not calibrated when purchased!
Regulations concerning environment of use:
•
Use this meter only for measurements in CAT I, CAT II and CAT III environments (see §4)
•
Use this meter only in a pollution degree 2 environment (see §5)
Max. voltage between terminal and earth
Display
Fuse protection
Power Supply
Ranging method
Polarity indication
25.02.2011
DVM68
test condition of base current 10 A
prior to replacing the battery or fuses.
disconnect the test leads prior to opening
free cloth. Do not use alcohol or solvents.
" indication appears on the display. " indication appears on the display.
1000V DC or 750V AC rms (sinus) 1000V DC or 750V AC rms (sinus)
3 ¾ digit LCD, 3260 counts max, 3 ¾ digit LCD, 3260 counts max,
2-3 readings / sec
A & mA range : F 300mA/250V A & mA range : F 300mA/250V
A range : F 10A/250V A range : F 10A/250V
9V battery
Auto / Manual
" - " displayed
10
0V, Ø6.3x30mm).
from the input jacks.
input jacks.
environments (see §4)
©Velleman nv
Rev. 01