Operation Manual

4 GMC-I Messtechnik GmbH
Errors and Extraordinary Strains
If it may be assumed that the instrument can no longer be operated safely, it must
be removed from serviced and secured against unintentional use. Send the instru-
ment to the Repair and Replacement Parts Service Department; see Chapter 10,
page 13. Safe operation can no longer be relied upon,
• if measurement cables are damages,
• if the instrument demonstrates visible damage,
• if the needle gauge no longer responds,
• if one of the LEDs is defective,
• if the instrument no longer functions,
• after lengthy periods of storage under unfavorable conditions.
Observe the following safety precautions:
• The instrument may only be operated with batteries or storage batter-
ies. Mains driven power packs are not permissible, because the use
of such is life endangering.
• Be prepared for the occurrence of unexpected voltages at devices
under test. (For example, capacitors can be dangerously charged.)
• Make certain that measurement cables are in flawless condition, e.g.
no damage to insulation, no creases, no interruptions etc.
Attention!
Do not touch the test prods or the device under test during
voltage testing! High-voltage of up to 5kV is present!
Attention! Accumulation of Moisture: An accumulation of moisture on
the tester, on the measurement cables or on the DUT must be
avoided, because leakage currents may be caused by high-voltages
at exposed surfaces. Even isolated components may carry high-
voltages.
Note

Overvoltage Influence: If the reversible fuse (PTC thermistor)
responds to an overvoltage or an extraneous voltage, measure-
ment may not be resumed immediately. A cool-down period of
approximately 2 minutes must be observed.
Using the test probes (Electrical Safety)
Attention!
Measurements per DIN EN 61010-031 may only be per-
formed in environments in accordance with measuring cate-
gories III and IV with the safety cap attached to the test probe
at the end of the measurement cable.
In order to establish contact inside 4 mm jacks, the safety caps have to be
removed by prying open the snap fastener with a pointed object (e.g. the
other test probe).
Meaning of symbols on the instrument
Warning concerning a point of danger
(Attention: observe documentation)
Caution: high-voltage!
A life endangering high-voltage of up to 5 kV
is present at the test prods.
CAT II/III/IV Measurement category II/III/IV device
Continuous double, or reinforced insulation
Seal of approval from VDE testing authority
This device and the inserted (rechargeable) batteries may not be
disposed of with the trash. For information regarding the WEEE
mark can be accessed on the Internet at www.gossen-
metrawatt.com by entering the search term ’WEEE’.
Indicates EU conformity
!
Maximum rated voltage 300 V 600 V 1000 V 5000 V
Measuring category
CAT IV CAT III CAT II —
With safety cap attached
——
Without safety cap
— — 
!
!