09/ 2013
-
Connect the black safety test lead to the COM-terminal
of the
MN 1
.
- Connect the red safety test lead to the input terminal for V, Ω, µA,
of the
MN 1
.
- Connect the safety test leads across the diodes and read the measured
value on the digital display
of the
MN 1
.
- For a typicale silicone diode tested in the forward-based direction a voltage
flow between 0,500 V and 0,900 V is displayed. A display showing"000 V"
indicates a short circuit in the diode, whereas a display showing "1,5 V"
indicates an open circuit in the diode.
- For a diode tested in the reverse-based direction the display reads "1,5 V".
If the diode is damaged, the display will show "000 V" or other values.
see Figure 7:
Diode Testing
9. Maintenance
Remove test leads and turn the power off before opening the
MN 1
! Dangerous voltage!
Any work to be carried out on an opened
MN 1
under voltage
is
strictly reserved for qualified electrotechnical personnel who must take
special precautionary measures to avoid accidents.
This is how to ensure that the
MN 1
is free from any voltage before
the instrument is opened:
- first remove the safety test leads from measured object.
- then remove both safety test leads from the
MN 1
.
- turn the rotary switch
to the "OFF" position.
9.1 Instrument safe-guarding
In certain circumstances, safety during the use of the
MN 1
can no
longer be guaranteed; when for instance:
- there is visible damage to the housing
- measurement errors occur
- the instrument has been subjected to prolonged storage under unfavorable
conditions and
- the instrument has been subjected to severe transport stresses.
In such cases the
MN 1
must be immediately switched off, removed
from the measurement points and secured against any future unintentional
operation.
9.2 Cleaning
Wipe the case of the
MN 1
with a clean dry cloth (exception
: spe-
cial cleaning cloths). Do not use any solvents and/or abrasives to clean the
MN 1
.
9.3 Battery replacement
Remove test leads and turn the power off before opening the
MN 1
! Dangerous voltage!
The
MN 1
is powered by two 1.5 V batteries. Battery replacement
(see figure 8 below) becomes necessary when the low battery indicator
shows in the display
.
This is how to change the battery:
- Remove the safety test leads from the measured circuit.
- Remove the safety test leads from the
MN 1
.
- Turn the rotary switch
to the "OFF" position.
- Remove the protective rubber holster
from the
MN 1
.
- Place the
MN 1
on its front side and remove the screw from the
case back.
- Lift the end of the case back near the input terminals until it gently unsnaps
from the case front at the end nearest to the LCD display
.
- Remove the empty batteries from inside the battery holders.
- Insert new batteries correctly into the battery holder.
- Press the case back and case front together again and reinstall the screw.
- Place the
MN 1
back into its protective rubber holster
.
see Figure 8:
Battery replacement
Please contribute to environmental protection! Batteries should
not be thrown into domestic refuse bins! They can be discarded
at collection points for old batteries or special refuse. Please
contact your municipality for more information.
www.motor-pump-ventilation.com
0XOWLPHWUH01PSYQRWLFHSGI
