Amprobe BDM40-UA Bench-Digital-Multimeter - Manual (Page 8)

7
OPERATING GUIDELINES
To use your multimeter fully, there are some additional factors to be considered, such as measurement
techniques, the maximum signal input levels that will not damage your instrument, and common applications.
Operating Notes
The operating notes present the capabilities and limitations of this instrument and routine operator maintenance
instructions. Everyone using an DMM should be familiar with the operating notes.
Input Overload Protection
W CAUTION
Exceeding the maximum input overload limits can damage your instrument. The
transient overload protection circuit is intended to protect against short duration high
energy pulses. The components used limit the protection to approximately five pulses
per second for 6kV - 10 microsecond pulses, and about 0.6 watts average for lower
amplitude pulses .
Each measurement function is equipped with input overload protection. Table 1 lists the overload limits for each
function.
Input Connections to Common
WX WARNING
TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO NOT CONNECT THE
COMMON INPUT TERMINAL TO ANY SOURCE OF MORE THAN 500 VOLTS DC OR PEAK
AC ABOVE EARTH GROUND
This instrument may be operated with the common input terminal at a potential of up to 500V dc or ac peak with
respect to earth ground. If this limit is exceeded, instrument damage or an operator safety hazard may Occur.
Operating Power
This instrument is available in a universal version that uses 117V or 230V AC at 47 to 440Hz
Table 1. Maximum Input Signal Limits
FUNCTION
SELECTED
RANGE SELECTED
INPUT
TERMINALS
MAXIMUM INPUT OVERLOAD
DC ALL RANGES 1200VDC or Peak AC
20V, 200V, 1000V 1000VDC or Peak AC V
AC
200mV, 2V
V / Ω and
COMMON
1000Vrms for no longer than 15 sec.
2A Fuse protected: F 2A / 250V
20A
DC or
AC
ALL RANGES
mA / 20A and
COMMON Not fused
k Ω ALL RANGES
V / Ω and
COMMON
250VDC or VAC rms