Gossen Metrawatt M540E, METRISO 5023 User guide

Operating Instructions

METRISO5024

Insulation and Resistance Measuring Instrument with Voltage Measuring Range

3-349-346-03

3/3.11

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)

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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

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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

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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.

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