Maxwell Digital Multimeters 25302 - Handling and Maintenance; Handling Precautions; Battery Replacement; Fuse Replacement

• The amplication factor of the
transistor is displayed on the screen.
I = 10 μA, V
BC
= 2,8 V
Frequency measuring
• Connect the measuring wire or the shielded cable to
the „COM” and „V/ Ω/Hz” connectors.
• Set the function switch to „1 MHz” position and
touch the wires to the signal source.
Note:
• Do not measure frequency at a voltage exceeding 250V RMS!
• In noisy environment it is advised to use a shielded cable for
measuring small values.
• Avoid touching the circuit when measuring high voltage!
Data hold function
• Pressing the „HOLD” button the displayed value on
the screen gets held. To turn the function o press
the button again.
Automatic power off and standby
• 15 minutes after the last measurement the device
powers o automatically.
• Press long the „Power” button when the device is on,
and the automatic power o function switch o.
Backlight
• Press long the „B/L” button to backlight on, the light
switch o automatically after 10sec.
WarninG
• When measuring 36 V DC / 25 V AC voltage make
sure that the wires are not connected to a current
measuring connector and that the function
switch is not in resistance or diode measuring
mode. Always check if you have connected the
wires into the proper connectors.
• Be careful when measuring voltage above 50V,
especially with high voltage equipment.
• Avoid connecting to "live" circuits.
• Turn o the power in the circuit before
connecting the multimeter to measue current
and do not measure above 20A.
• Before measuring resistance and diode make sure
the circuit is not under power.
• Only replace fuses to the same type and value.
• When replacing the fuse or battery make sure all
external power sources are turned o and that
the multimeter is turned o as well.
HandlinG and
Maintenance
Handling
• Keep the multimeter dry. If it is exposed to
moisture wipe it dry immediately. Liquids may
corrode the circuits.
• The multimeter must only be used at normal
temperatures. High temperatures decrease the
lifetime of electronic devices, damage batteries
and distort and damage plastic parts.
• Handle the multimeter with care. A drop may
damage the circuits and the case which may
cause incorrect operation.
• Protect the multimeter from dust and other dirt
that may cause premature abrasion.
• Clean the multimeter with a wet cloth. Do not
use chemicals, solvents or strong detergents
for cleaning.
Battery replacement (1 x 9V)
• Disconnect any external circuits from the
device. Turn the multimeter o and remove the
measuring wires from the connectors.
• Unscrew the screw at the bottom and remove
the bottom cover.
• Remove the depleted battery and replace it to
a new one of the same type.
Fuse replacement
• Disconnect any external circuits from the
device. Turn the multimeter o and remove the
measuring wires from the connectors.
• Unscrew the screw at the bottom and remove
the bottom cover.
• Replace the melted fuse to one of the same
type and value (5x20 mm, 200 mA / 250 V „F”
type)