User manual

4 GMC-I Messtechnik GmbH
1 Safety Precautions
The METRISO 5024 insulation measuring instrument is
manufactured and tested in accordance with the following
standards:
IEC 61010-1/EN 61010-1/VDE 0411-1,
IEC 61557-2/EN 61557-2/VDE 0413-2
IEC 61557-4/EN 61557-4/VDE 0413-4
IEC 61326-1/EN 61326-1
IEC 61000-4-2/EN 61000-4-2
IEC 61000-4-3/EN 61000-4-3
IEC 61000-4-4/EN 61000-4-4
IEC 61000-4-5/EN 61000-4-5
IEC 61000-4-6/EN 61000-4-6
IEC 61000-4-8/EN 61000-4-8
In order to maintain flawless technical safety conditions, and to
assure safe use, it is imperative that you read these operating
instructions thoroughly and carefully before placing your instrument
into service, and that you follow all instructions contained herein.
1.1 Defects and Excessive Stressing
If it can be assumed that safe operation is no longer possible, the
instrument must be removed from service and secured against
inadvertent use. It must be assumed that safe operation is no longer
possible:
• If the device demonstrates visible damage
• If the instrument no longer functions
• After long periods of storage under unfavorable conditions
• After extraordinary stressing due to transport
2 Device Description
2.1 Using Device
The METRISO 5024 measuring instrument is a battery operated
combination device with direct display. It is suitable for the following
measurements:
• AC and DC voltages without indication of polarity within a range of
0 to 500 V. This function is especially well suited for testing DUTs
for absence of voltage before performing resistance or insulation
measurements.
• Low resistance measurement within a range of 0 to 4 Ω.
Advantageous for resistance measurements at coils, over
contacts, and at equipotential bonding conductors and
protective conductors.
• Measurement of insulation resistance within a range of 100 kΩ to
400 MΩ. The device is suitable for measuring and testing
insulation resistance at electrical systems and devices and
allows for the selection of the following nominal voltages: 100 V,
250 V or 500 V DC.
2.2 Design Description
Thanks to its design and the use of two-hand operation (Figure 1),
the device is well suited for safe, daily use. It can be secured against
dropping with the attached carrying strap.
The METRISO 5024 includes two switches for device operation:
• Toggle switch for function selection (4)
• Rotary switch (3)
Measured values are displayed at three analog scales (2). Figure 1
shows these scales in detail. Insulation resistance is displayed at the