Table of Contents
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C O N T E N T S
1 Introduction.............................................................................................................3
1.1 Safety Instructions ...............................................................................................3
1.2 General Characteristics .......................................................................................6
1.3 First Steps ...........................................................................................................7
1.3.1 Setting the Test High Voltage ...........................................................................8
1.3.2 Setting the Display Sensitivity...........................................................................9
1.4 Functions of the Safety Button.............................................................................9
2 Acoustic Signals during the Test Procedure .........................................................12
2.1 Flaw (Pore) ........................................................................................................12
2.2 Exhaustive Discharge Protection of the Battery.................................................12
2.3 Lack of Earth Connection ..................................................................................12
2.4 Load Exerted by the Test Specimen..................................................................13
2.5 Reminder to Switch Off......................................................................................13
2.6 Alarm Signals ....................................................................................................13
2.7 Unique Display of All Operating States..............................................................14
3 Maintenance .........................................................................................................15
3.1 Replacing the Battery in the Handle ..................................................................15
A Annex ...................................................................................................................16
A.1 Technical Data ..................................................................................................16
A.1.1 Power Supply .................................................................................................16
A.1.2 Test Voltage ...................................................................................................16
A.1.3 Dimensions and Weights................................................................................16
B Accessories..........................................................................................................17
B.1 Charger Units ....................................................................................................18
B.1.1 Forms of Charger Units Available ..................................................................18
B.1.2 Types of Battery ............................................................................................18
B.1.3 Connecting the Battery to the Charger Unit....................................................18
B.1.4 Charging the Battery ......................................................................................19
B.1.5 Testing the Current State of Charge ..............................................................19
B.1.6 Technical Data ...............................................................................................20
B.3 Extension Rod...................................................................................................21
C. Checklist .............................................................................................................23
C.1. Test of Readiness for Operation ......................................................................23
C.1.1 Battery (Varta 5M6 6 V/6 Ah or Sonnenschein 6 V/6.5 Ah)............................23
C.1.2 Meaning of the Acoustic Signals ....................................................................23
C.2 Test Voltage......................................................................................................25
C.2.1 Check whether the test electrode has high voltage as follows: ......................25
C.2.2 Is the test voltage correctly set?.....................................................................25
C.2.3 Is the test voltage monitored with a sphere gap?...........................................25
C.3 Earthing.............................................................................................................25
C.3.1 Methods of Earthing .......................................................................................25
C.3.1.1 Direct Connection (Earthing) Between Test Object and ISOTEST ...............26
C.3.1.2 Indirect Earthing With an Earthing Rod and Trailing Earth..........................26
C.3.1.3 Special Forms of Earthing...........................................................................28
C.4 Test Procedure .................................................................................................28
C.4.1 Is an Automatic Controller Installed in the Tester?.........................................28
Operating Manual Isotest 3P
Page 1
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Summary of Contents for ELMED ISOTEST 3P
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Page 1: Table Of Contents
C.3.1.1 Direct Connection (Earthing) Between Test Object and ISOTEST ....26 C.3.1.2 Indirect Earthing With an Earthing Rod and Trailing Earth......26 C.3.1.3 Special Forms of Earthing................28 C.4 Test Procedure ....................28 C.4.1 Is an Automatic Controller Installed in the Tester?.........28 Operating Manual Isotest 3P Page 1... - Page 2 C.4.3.2 Correct Testing of Socket Pipes..............29 D Tables for Intermediate Values of the Test Voltage ..........30 ISOTEST 3P-F - Special Model In this special model, the test voltage is set with a micro-drive. This gives a higher degree of precision, particularly with low test voltages. For technical reasons, the test voltage is limited to 25 kV.
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Page 3: Introduction
1.1 Safety Instructions The following instructions are given for your safety. Due to the fact that operation of the ELMED ISOTEST is so simple, there is a great temptation to use the tester without reading the operating manual. Nevertheless, for your own safety, take a few minutes to read the manual before switching on the tester for the first time. - Page 4 the item being tested and all parts connected to it electrically and the earthing cable. Patients with pacemakers must not use this insulation testing equipment!! Excerpt from the expert opinion of 20.02.1997 Operating Manual Isotest 3P Page 4...
- Page 5 Should any work be necessary on the tester, this should only be carried out by trained specialist personnel. Particular care is necessary as opening the tester exposes the user to voltages which are considerably higher than the supply voltage. Operating Manual Isotest 3P Page 5...
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Page 6: General Characteristics
Thanks to the sturdy design in conjunction with proven technology, the tester is suitable for use under the arduous working conditions on construction sites. More than 40 years of experience in the field of high-voltage testing are your guarantee of proven and advanced technology. Operating Manual Isotest 3P Page 6... -
Page 7: First Steps
Turn on the tester main switch (short buzzer tone). Press the safety buttom on the handle. CAUTION! The buzzer now sounds briefly to indicate that the set high voltage is now connected to the test electrode. Operating Manual Isotest 3P Page 7... -
Page 8: Setting The Test High Voltage
Annex (see page 26). CAUTION! The setting range of the rotary scale is limited mechanically below the value 0.0 and above the value 13.55. Forcible turning beyond these values will result in destruction of the rotary scale. Operating Manual Isotest 3P Page 8... -
Page 9: Setting The Display Sensitivity
If the safety button is pressed harder than usual (e.g. due to the tester squeezing it convulsively as a result of contact with the high voltage), the unit is switched off at once. This switching off is indicated by an alarm signal and can only be stopped by Operating Manual Isotest 3P Page 9... - Page 10 The second step of the safety switch is activated ( additional safety function). When turning on the ISOTEST you will hear the following acoustic signal: long short short short short When delivered ex works the second switch step of the safety switch is not activated Operating Manual Isotest 3P Page 10...
- Page 11 Now you will hear the acoustic code of the newly chosen operating mode. Switch off the Isotest at the main switch The Isotest will stay at the last chosen mode even when turning it off and on. Operating Manual Isotest 3P Page 11...
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Page 12: Acoustic Signals During The Test Procedure
In order to minimise the possibility of errors when earthing, the lack of an earthing plug in the earthing socket will be signalled by the buzzer sounding continuously. Operating Manual Isotest 3P Page 12... -
Page 13: Load Exerted By The Test Specimen
Checklist under point C.3.1. 2.4 Load Exerted by the Test Specimen The wide range of possible applications of the ELMED insulation tester can necessi- tate an adaptation of the display sensitivity to the different loads (see 1.3.2). Factors for the load area e.g.: ... -
Page 14: Unique Display Of All Operating States
If the safety buttom is pressed when the main switch is turned on. If a continuous high-voltage flash-over lasts for more than 5 seconds. The alarm signal can only be stopped by turning the main switch off. Buzzer No buzzer Operating Manual Isotest 3P Page 14... -
Page 15: Maintenance
3 Maintenance In order to ensure the reliability and high standard of quality of your ELMED ISOTEST tester over a prolonged period, it should receive regular maintenance. The observation of the prescribed maintenance intervals is a major factor in ensuring the functional reliability of the tester and in many cases can prevent the need for expensive repairs. -
Page 16: A Annex
Current (effective value): approx. 40 mA A.1.3 Dimensions and Weights Length: 280 mm Height: 235 mm Width: 100 mm Length of high-voltage cable: 1500 mm Weight incl. handle: 4.5 kg Weight of the battery: 1.0 kg Operating Manual Isotest 3P Page 16... -
Page 17: B Accessories
High voltage extension cable Earthing accessories Trailing grounding cables Earthing stick Earthing collar Power supply Spare battery Charger units Transport boxes for ISOTEST and accessories High-voltage pulse-type voltmeter HV40 ISO AUTOMAT P2 for stationary tests Operating Manual Isotest 3P Page 17... -
Page 18: Charger Units
The battery must be taken out of the unit to allow it to be charged or its capacity to be checked. Do this by opening the battery compartment, undo the plug(s) and lift the battery out of the unit by the loop (Pb battery) or carefully by the connecting cables (NiCd battery). Operating Manual Isotest 3P Page 18... -
Page 19: Charging The Battery
14 hours charging is not necessary recommendation Further charging of an already charged battery is less harmful for lead-acid batteries than for nickel-cadmium batteries. Unnecessary charging should be avoided in any case. Operating Manual Isotest 3P Page 19... -
Page 20: Technical Data
600 mA max. 7.2 V for 14 hours for 14 hours Holding charge: 50 mA 50 mA Types of battery: Nickel-cadmium and Nickel-cadmium and lead-acid batteries 6 V/6.5 Ah lead-acid batteries 6 V/6.5 Ah Operating Manual Isotest 3P Page 20... -
Page 21: Extension Rod
A locator tube must be screwed into the extension rod. Fig. 4.3.a Operating Manual Isotest 3P Page 21... - Page 22 ( and in Fig. 4.3.b). The extension rod coupled to the handle only requires to be provided with a locator tube . The locator tube is only screwed into the extension rods and can be changed easily. Fig. 4.3.b Operating Manual Isotest 3P Page 22...
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Page 23: Checklist
C.1.1 Battery (Varta 5M6 6 V/6 Ah or Sonnenschein 6 V/6.5 Ah) Has the battery state of charge been checked correctly? This test can be performed using the ELMED battery charger (see operating manual for the battery charger). C.1.2 Meaning of the Acoustic Signals A brief buzzer sound when the test button is pressed indicates that the tester is ready for operation. - Page 24 The reduction in the display sensitivity has no effect on the level of the set voltage!! Only for the ISOTEST 3P Turn off main switch If the safety button is pressed while the Switch on again without main switch was being turned on pressing the safety switch.
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Page 25: Test Voltage
ELMED testers have an automatic control system with integral sphere gap. The function of the sphere gap can be heard as a light tapping sound in the tester or test rod. -
Page 26: Direct Connection (Earthing) Between Test Object And Isotest
C.3.1.1 Direct Connection (Earthing) Between Test Object and ISOTEST With this method of earthing, the earthing cable supplied (15 m) is connected to the tester via the earthing plug (see section C.3.1.2). The earthing clip at the other end of the earthing cable is now attached to a conductive part of the test specimen. Ensure that the point to which the earthing clip is fastened is metallically bare in order to ensure a reliable connection. - Page 27 Bridge the poorly conductive ground with a second earthing rod and earthing cable Insufficient contact area between the Use ELMED trailing earths. They trailing earth and the ground. consist of 6.5 m long bronze double coils for optimum earthing. Do not use "home-made"...
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Page 28: Special Forms Of Earthing
C.3.1.2 is not possible, it is possible to use a capacitive earth. Since in such cases, conditions specific to the particular application have to be taken into consideration, please contact ELMED beforehand in order to enable us to recommend a solution tailored to your particular application. - Page 29 sphere gap and an automatic controller which hold the preset voltage constant even under load. C.4.2 Are the Test Electrodes in Order as per DIN 30 672, Section 5.5.5? C.4.2.1 Has a spiral electrode appropriate to the pipe diameter been selected? The electrode must be flush on all sides.
- Page 30 D Tables for Intermediate Values of the Test Voltage ! For standard model only ! 0.37 10.0 1.65 20.0 5.03 30.0 9.45 0.47 11.0 2.02 21.0 5.37 31.0 10.04 0.56 12.0 2.36 22.0 5.69 32.0 10.70 0.67 13.0 2.71 23.0 6.03 33.0 11.45...
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