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Range of application

The 

is  designed for testing voltage-free contacts resistance. 

Any usage other than this is regarded as not appropriate. 
For any damage resulting from inappropriate usage, the manufacturer/supplier can not be hold liable; the 
user bears all risks. 
Before the tester is switched on for the first time or after it has been transported, it needs to adapt to the 
ambient  temperature  first.  Please  unpack  the  device  and  put  it  on  a  table.  You  should wait  at  least  30 
minutes before switching it on.
The device must not be exposed to the condensation of water.

We  are  pointing  out  that  for calibration check  of  the  testing  device  regarding  its  correct 

accuracy, it is necessary to use a calibrated resistance .  This 

is connected to the test leads of the testing device  and it is tested,  whether the values of the 

resiatnce  are  the  same  as  the  measured  values. 

In   order  to  make  sure 

that  the  comparison  data  are  correct, 

must  be 

calibrated annually.

We  should  like  to  point  out:  Every  year  and  after  every  modification  (repair),  which  could  influence  the 
measuring  equipment,  the  testing  device  must  be  calibrated  and,  if  necessary,  adjusted.  The 
supplier/manufacturer will test the device regarding its accuracy and confirm the calibration in a certificate.

Udey 

 Contact Resistance Tester

calibrated resistance

 resistance

Warantee & Liability

The testing device has been designed according to the latest developments in technology,  checked and is 
therefore  operationally  reliable.  In  case  the  tester  is  maintained  or  repaired  improperly  by  persons  not 
authorized by 

the liability will in any case be passed on to the owner. 

The same applies if  the  testing  device is  operated  in  any  other  way  than  described  in  this  manual. 

The user is obliged to operate the tester only in perfect condition.
Udeyraj Electricals  Pvt  Ltd   is  liable  for  mistakes  and omissions,  with  the exception  of  further claims, 

only  within  the  framework  of  the  warantee  commitments  in the order  confirmation 

(respectively  the  commitments in the offer).

In view of the permanent development and improvement of our products, we reserve the right for technical 
modifications at any time. Such modifications, mistakes and misprints do not imply a claim for damages.

Furthermore,  only  original 

      UDEY  spare  parts  and  accessories  may  be  used.  For  any  damage 

arising  from  non-observance  of  the  instructions  in  this  operating  manual   Udeyraj  Electricals  Pvt   Ltd., 

do  not  assume liability. Only the Indian  original of this operating  manual is binding. The above information 
does not  extend   the   

liability- and  warrantee agreements  of  the  conditions  of sale   and  

delivery  of 

Udeyraj Electricals Pvt Ltd. 

.

 Udeyraj   Electricals  Pvt   Ltd.,

Contact Resistance Tester MRL-11

Attention! 

Attention! 

Summary of Contents for MRL-11

Page 1: ...ctrical tester The operator of this equipment must use good judgment and follow all safety precautions noted in this guide to ensure the protection of him self and others in close proximity to the test area Failure to follow safety instructions could be dangerous Proper grounding of the tester must be done prior to connecting this tester to a power source UDEYRAJ ELECTRICALS PRIVATE LIMITED 212 A ...

Page 2: ...0 12 OPERATING INSTRUCTIONS 10 13 SERVICE REPAIRS 15 14 WARRANTEE 20 15 SERVICE FORM 21 The information contained in this booklet is up to date at the time of publication Due to our constant endeavor to keep abreast with modern methods and to our continuous research activity it may be altered at any time without previous notification COPY RIGHT 2011 All rights reserved No part of this publication ...

Page 3: ...nal v The Device under test DUT v Any part of the tester which is electrically connected to output terminal v All above immediately after the output has been cut OFF 2 Also Electric shock or Accident may arise in the following case v The Tester being operated without grounding v If proper gloves for Electrical Job are not used v Approach to any part connected to the output terminal while the power...

Page 4: ...Atmosphere To avoid fire and explosion hazard b Un stable Position Slant position or where the tester may be subjected to vibrations c Heat Nearby a source of heat Operable temperature of tester is up to 45 C d High Humidity Operable humidity range of tester is 20 to 80 RH e Ill Ventilated Place f Dusty atmosphere g Near high sensitivity devices Such as communication receivers lest the noise gener...

Page 5: ...itance discharge It is extremely important that when tests are made involving capacitance and dangerously high voltage as when making tests on cables transformers etc that such circuits be discharged at the end of a test This must be done BEFORE THE TEST LEADS ARE Contact Resistance Tester MRL 11 a The instrument should be connected to a good ground b The instrument s working place should keep awa...

Page 6: ...ign that gives accurate and reliable results again and again RS232 link is also provided 2 0 PRINCIPLE Principle Current of 100A DC is passed in the contact and voltage drop across the contacts is sensed processed and the resistance is displayed on screen MRL 11 is micro controller operated user friendly accurate reliable small light weight and reliable tester MRL 11 incorporates a large LCD scree...

Page 7: ...Prints test results through its built in printer Test results can be saved in memory and can be recalled later True portability is achieved by the lightweight only 4 kg single unit design housing the MRL 11 The MRL 11 is encased in an aluminum alloy cabinet 8 0 SPECIFICATIONS Power supply 220V 10 AC 50 Hz Measuring range 0 to 1999 9 ìohm Resolution 0 1 ìohm Test current 100A DC Measurement accurac...

Page 8: ...n both sides of the printer box then fasten the slides with screwdriver to screw the printer tightly the printer will cling the instrument firmly Loading paper roll and feed paper Pulling upper side of the front cover with 2 fingers pinching slightly to uncover the front cover drag out with 2 fingers pinching the slide chassis clips the printer slides chassis about 20 mm and then put the paper row...

Page 9: ... 15 rev 03 RS 232 C C P P POWER 240V AC 50 Hz ON E N L Printer Display POW ER 3 pin socket for mains cord with plug and illuminated rocker switch for ON OFF PRINTER Built in printer DISPLAY Back lit LCD display KEY FUNCTIONS Cursor movement key Moves cursor UP DOWN LEFT RIGHT EXIT To go to start menu as figure 1 ENTER To enter command Rx C and C are current output terminals P and P are voltage sen...

Page 10: ...t Connect mains power supply and switch rocker switch ON LCD displays as figure 1 below Fast measure Measure Data Time PC Figure 1 MEASURE IN FAST MEASURE mode Fast measure is automatically selected to start test press ENTER and automatically after approximately 3 seconds Rx and test current are displayed as per figure 2 below 100A 1000 0 uOhm Print Save Figure 2 By default cursor is at Print and ...

Page 11: ... key test starts and display is as figure 4 below 100A 1000 0 uOhm Stop 01 s Figure 4 01 s displays in count up mode to 60 seconds After 60 s test is complete and current output is switched off display as figure 5 below 100A 1000 0 uOhm Print Save 60 s Figure 5 By default cursor is at Print and to print results press ENTER key To save results move cursor by key to Save and press ENTER key ...

Page 12: ...low 02 14 14 12 33 02 13 14 11 13 01 01 14 10 08 02 08 13 09 33 Figure 7 Bring cursor to data to be viewed by key Press Enter key display is as figure 8 below 100A 1000 0 uOhm Print Del Return Figure 8 Default cursor setting is on Print Press Enter key to print If data is to be deleted bring cursor to Del by key and press Enter key To return to start menu bring cursor to Return by key and press En...

Page 13: ...top ing Figure 11 In figure 11 Top left is MONTH Top middle is DATE Top right is YEAR Lower left figure is HOUR and lower right is MINUTES If the figure selected by cursor is to be changed press Enter key and every one press will increase to next numerical When desired numerical is reached move cursor to next figure by key to the figure to be changed and press Enter key to increase the numerical I...

Page 14: ... setting of date and time After pressing Enter display goes back to starting menu as seen in figure 1 PC OPTION Bring cursor to PC by key as figure 13 below Fast measure Measure Data Time PC Figure 13 Link the RS 232 cable to the PC and then press Enter and the tester is ready for Rs 232 use ...

Page 15: ...ceable parts inside Hence refer servicing to qualified service personnel 13 2 The manufacturer s spare parts and repairs division is UDEYRAJ ELECTRICALS PRIVATE LIMITED 212 A Hind Saurashtra Industrial Estate Contact Resistance Tester MRL 11 ...

Page 16: ...is testing device in an inappropriate way or for improper use this testing device can be dangerous Each person in the factory of the user that deals with the installation the operation and the maintenance of Contact Resistance Tester must have read and understood the complete operating manual and particularly the information on safety We recommend that the user has this confirmed in writing see an...

Page 17: ...pment may only be used in dry state and in dry rooms Only suitable qualified personnel or trained personnel under supervision of specialists must work on this equipment Usage The relevant regulations State requirements and laws must be followed strictly Every day before starting work equipment accessories and supply line must be visually examined to ensure their perfect condition Every user must b...

Page 18: ...g manual is known to the relevant persons We recommend reading this operating manual carefully because we will not accept liability for any damage or operating trouble resulting from disregarding this operating manual Should you nevertheless have difficulty with the operation please do not hesitate to contact our service department Range of application UDEY Contact Resistance Testerhas been design...

Page 19: ... Contact Resistance Tester calibrated resistance resistance Warantee Liability The testing device has been designed according to the latest developments in technology checked and is therefore operationally reliable In case the tester is maintained or repaired improperly by persons not authorized by the liability will in any case be passed on to the owner The same applies if the testing device is o...

Page 20: ... at no charge to the Original Purchaser This warranty does not cover a Damage or failure caused by or attributable to acts of God abuse accident misuse improper or abnormal unintended usage failure to follow instruction as laid in the manual improper installation or maintenance alteration unauthorized modifications lightening or other incidences of excess voltage or current as evaluated by the com...

Page 21: ...ctions with DUT 5 0 Details of accuracy checks made if any a Standard used b Accuracy of standard c Validity of standard d Name of person who checked 6 0 Environment in which verification made a Room temperature b Relative humidity 7 0 Environment in which product is used a Room temperature b Relative humidity c Dry bulb temperature d Wet bulb temperature 8 0 Additional info Contact Resistance Tes...

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