Operating Instructions
METRISO5024
Insulation and Resistance Measuring Instrument
with Voltage Measuring Range
3-349-346-03
3/3.11
1
2
3
4
8
5
7
10
9
6
2a
Figure 1 Controls
1 Measuring probe on housing (positive pole)
2Scale
2a Adjusting screw for mechanical zero balancing
3 Rotary switch for
– Ω : Low-resistance measurement (toggle switch in Ω position)
– 100 V/250 V/500 V:
Toggle switch in neutral position:
• Voltage measurement
• Test for absence of voltage and discharge capacitive DUTs
Toggle switch in MΩ position:
• Insulation measurement with the selected test voltage
4 Tog g l e s w i t c h for switching amongst V, Ω and MΩ
(with illuminated scale when Ω or MΩ is selected)
5Carrying strap
6 Battery compartment
7 Detaining fork
8 Test probe on coil cord (negative pole)
9 Opening for securing the test probe
10 LED for indicating device and battery status
(see chapter 4.2 and 4.3)
2 GMC-I Messtechnik GmbH
Meanings of symbols on the instrument:
!
Indicates EC conformity
Continuous, doubled or reinforced insulation
Warning concerning a source of danger
(attention: observe documentation!)
CAT I I Maximum allowable voltage between the test probes (1 and 8)
and earth is 600 V, category II.
This device may not be disposed of with the trash. Further
information regarding the WEEE mark can be accessed on
the Internet at www.gossenmetrawatt.com by entering the
search term ’WEEE’.
Table of Contents Page
1 Safety Precautions ...............................................................4
1.1 Defects and Excessive Stressing .......................................................... 4
2 Device Description ................................................................4
2.1 Using Device ......................................................................................4
2.2 Design Description .............................................................................. 4
3 Preparation for Device Operation .........................................5
3.1 Unpacking the Device .........................................................................5
3.2 Power Supply – Battery Replacement ................................................... 5
3.3 Checking the Mechanical Zero Point ....................................................5
3.4 Checking Device Functions .................................................................. 6
4 Operation ..............................................................................7
4.1 Voltage Measurement ......................................................................... 7
4.2
Insulation Resistance Measurement (VDE 0413, part 2 / EN 61557, part 2) ....... 8
4.3
Low-Resistance Measurement (VDE 0413, part 4 / EN 61557, part 4) ............... 9
5 Maintenance – Recalibration ..............................................10
5.1 Housing ........................................................................................... 10
5.2 Batteries ..........................................................................................10
5.2.1 Details on Power Consumption and Operating Time ............................ 10
5.3 Replacing the Fuse ...........................................................................10
5.4 Recalibration .................................................................................... 11
5.5 Device Return and Environmentally Compatible Disposal .....................12
6 Characteristic Values ..........................................................12
7 Repair and Replacement Parts Service
Calibration Center
and Rental Instrument Service ........................................... 14
8 Product Support .................................................................14
GMC-I Messtechnik GmbH 3
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
4 GMC-I Messtechnik GmbH
uppermost scale, low-resistance at the middle scale and voltage at
the bottom scale. The device’s operating status and battery charge
level are indicated with the 2-color LED in the scale (Figure 1).
The battery compartment is located in the housing base (6). The
procedure for replacing batteries is described in 3.2.
All measurements are performed with two test probes:
• One test probe (1) is permanently attached to the housing –
positive pole.
• The other (8) is attached to a coil cord – negative pole
This test probe (8) can be inserted into the opening (9) and secured
by snapping the handle into the detaining fork (7).
As long as the toggle switch (4) is in the neutral middle position, the
METRISO 5024 can be utilized as a voltmeter.
The rotary switch must be set either to the 100 V, 250 V or 500 V
position in order to perform voltage measurements. No batteries are
required for this function.
The rotary switch must be set to the Ω position in order to perform
low-resistance measurements. Measurement is performed with the
toggle switch (4) in the Ω position. Voltage cannot be measured as
long as the rotary switch (3) remains in this position.
The desired test voltage must be selected with the rotary switch (3)
before performing insulation measurements. Measurement is
performed with the toggle switch (4) in the MΩ position.
3 Preparation for Device Operation
3.1 Unpacking the Device
Check for mechanical damage after unpacking the device. The
device is ready for use as soon as the batteries have been inserted
into the battery compartment.
3.2 Power Supply – Battery Replacement
The METRISO 5024 is operated exclusively with batteries for safety
reasons. Batteries are inserted or replaced as follows:
Ð First disconnect the measurement cables from the device under
test.
Ð Loosen the fastening screw at the bottom of the battery
compartment (6) and remove the battery compartment.
Ð Remove the depleted batteries and replace them with new or
fully charged batteries. Make sure that battery polarity is not
reversed during insertion (see printed symbols on the
compartment).
Ð Push the battery compartment back in and secure it with the
screw.
Recommended batteries: 4 ea. alkaline batteries per LR6, mignon
cells, AA cells, 1.5 V, at least 2300 mAh
3.3 Checking the Mechanical Zero Point
Ð Lay the device horizontally onto a work surface.
Ð Check the pointer for correct zero point adjustment and reset
with the adjusting screw (2a) if necessary.
The device may not be connected to a measuring circuit during
this procedure, and the toggle switch may not be activated.
Don’t forget: Negative pointer deflection is suppressed by the
scale’s limit stop. Always turn the adjusting screw clockwise for
this reason, and then slowly turn it counterclockwise until the 0 Ω
or 0 V position is reached.
GMC-I Messtechnik GmbH 5
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