Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual page 8

Safety Precautions
• Maximum permissible voltage
between the voltage measuring sockets or all connector sock-
ets and ground is 600 V for measuring category III and 300 V
for measuring category IV.
• Be aware of the fact that dangerous voltage peaks with signifi-
cant frequency components of greater than 1 kHz are not dis-
played when the low-pass filter is activated. We recommend
measuring voltage without the low-pass filter first, in order to
be able to detect any dangerous voltages.
• Be prepared for the occurrence of unexpected voltages at de-
vices under test (e.g. defective devices). For example, capaci-
tors may be dangerously charged.
• Make certain that the measurement cables are in flawless con-
dition, e.g. no damage to insulation, no interruptions in cables
or plugs etc.
• No measurements may be made with this instrument in electri-
cal circuits with corona discharge (high-voltage).
• Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be pres-
ent.
• Measurements under moist ambient conditions or with an in-
strument with condensation are not permissible
• Be absolutely certain that the measuring ranges are not over-
loaded beyond their allowable capacities. Limit values are in-
cluded in section 8, "Technical Data", in the table entitled
"Measuring Functions and Measuring Ranges" in the "Over-
load Capacity" column.
8
• The multimeter may only be operated with installed batteries or re-
chargeable batteries. Dangerous currents and voltages are otherwise
not indicated, and the instrument may be damaged.
• The instrument may not be operated if the fuse cover or the
battery compartment lid has been removed, or if its housing is
open.
• The input for the current measuring range is equipped with a
fuse link. Use specified fuses only (see page 84)! The fuse
must have a breaking capacity of at least 30 kA.
• Observe optical and acoustic warning signals (see section 1.2
and section 1.3).
Repair and Parts Replacement
When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measu-
ring circuit before performing repairs or replacing parts. If repair of
a live open instrument is required, it may only be carried out by
trained personnel who are familiar with the dangers involved.
Defects and Extraordinary Strains
If it may be assumed that the instrument can no longer be opera-
ted safely, it must be removed from service and secured against
unintentional use.
Safe operation can no longer be relied upon:
• If the device demonstrates visible damage
• If the instrument no longer functions, or if malfunctioning
occurs
• After long periods of storage under unfavorable conditions (e.g.
humidity, dust or extreme temperature (see "Ambient Condi-
tions" on page 84).
GMC-I Messtechnik GmbH