Metrel MD 9040 Digital-Multimeter, DMM, 20991440 Scheda Tecnica

17 

 
WARNING 
To avoid electrical shock, disconnect the meter from any circuit, remove the test leads 
from the input jacks and turn OFF the meter before opening the case. Do not operate 
with open case. Install only the same type of fuse or equivalent 
 
Cleaning and Storage 
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives 
or solvents. If the meter is not to be used for periods of longer than 60 days, remove the 
battery and store it separately  
 
Trouble Shooting 
If the instrument fails to operate, check battery, fuses, leads, etc., and replace as 
necessary. Double check operating procedure as described in this user’s manual 
 
If the instrument voltage-resistance input terminal has subjected to high voltage 
transient (caused by lightning or switching surge to the system) by accident or abnormal 
conditions of operation, the series fusible resistors will be blown off (become high 
impedance) like fuses to protect the user and the instrument. Most measuring functions 
through this terminal will then be open circuit. The series fusible resistors and the spark 
gaps should then be replaced by qualified technician. Refer to the LIMITED 
WARRANTY section for obtaining warranty or repairing service. 
 
Battery and Fuse replacement 
Battery use:

 Single 9V battery; NEDA1604G, JIS006P IEC6F22, NEDA1604A, 

JIS6AM6 or IEC6LF22 
 
Fuses use: 
MD 9040 and 9050: 
Fuse (FS1) for 

AmA current input: 1A/600Vac, IR 100kA, F fuse; 

Fuse (FS2) for A current input: 10A/600Vac, IR 100kA, F fuse 
 
Battery replacement: 
Loosen the 2 screws from the battery access door of the case bottom. Lift the battery 
access door and thus the battery compartment up. Replace the battery. Re-fasten the 
screws. 
 
Fuse replacement: 
Loosen the 4 screws from the case bottom. Lift the end of the case bottom nearest the 
input jacks until it unsnaps from the case top. Replace the blown fuse(s). Replace the 
case bottom, and ensure that all the gaskets are properly seated and the two snaps on 
the case top (near the LCD side) are engaged. Re-fasten the screws.