RTM User Manual - Strider Resource
Contents
1. Rope dim interval approx 18 38 mm 46 8 540 839 00 3 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 a S Weight RTM Transp Case kg Non Accuracy Max of Cal Cap Non Accuracy Max of Max Cap Temperature range ambient 20 C 60 C Display LCD 0 19999 Digit size mm 12 Battery life time 25 Alkaline 9V battery 6LR61 Sealing class IP 65 3 RTM 20 D Main parts 1 Tightening device 8 Display 2 Clamping jaw 9 Pull rod 3 Tightening screw 10 Leaf spring unit 4 Centre support flat 11 Load cell 5 Outer rope support 12 Battery unit 6 Electronic unit 13 Battery unit opening 7 Push buttons 14 5 Oe amp CD03 FH EA U o wu Ly 2 46 8 540 839 00 4 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 SA Force Measurement 4 Function By means of the tightening device of the centre support the rope is forced to decline ac cording to figure 4 1 The angle will always be the same as the rope is pressed against the fixed centre support by means of the clamping jaw Even if the rope diameter is changed the angle will stay the same 4 1 A resultant force is then obtained perpen dicular to the main direction of the rope see figure 4 2 sin X 2 x 1 F X sin x 2F Angle 1 43 gives sin 0 0250 1 40 X 1 40x2F X 1 20 x F i e rati2. of revision for about 2 seconds After that the RTM will go back to normal mode 6 1 9 Overload The instrument will indicate for two kinds of overload In both cases the displayed value will be flashing The unit will indicate an overload by flashing the display reading in about 1 Hz If the overload is due to that the Cal Cap of that Rope No has been exceeded the reading is on for 0 6 seconds and off for 0 4 seconds If the overload is due to that the Max Cap the loadcell of RTM has been exceeded the reading is on for 0 2 seconds and off for 0 8 seconds 46 8 540 839 00 10 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 SAE It can be difficult to immediately understand what kind of overload that is due but it is important to reduce the load as soon as the display flashes 6 2 Use 6 2 1 Before Use Check that the battery of the instrument is in good condition as per Low Battery Voltage section 6 1 5 Check that the threads of the tightening screw are clean and well lubricated ROCOL ASP grease or equal molybdenium disulphide grease is suitable 6 2 2 Measuring Instructions Unscrew the clamping jaw 1 by means of the tightening screw 2 enough to provide space for the rope Install the RTM on the rope for good contact on the outer rope supports 3 Try not to measure close to rope attachments etc Screw the clamping jaw 1 by hand to stop The rope then should be tight to the centre supp
3. RTM and then install it again The RTM will now indicate a higher value probably rather close to the desired end value If necessary make an adjustment of the tension with the RTM installed Loosen the RTM and check again The RTM should always be completely loosened between measurements 6 Handling 6 1 How to use the Push buttons PIAB RTM D BBB UNIT PEAK OFF 6 1 1 ON OFF ar Press the ON OFF button to start the instrument The startup is indicated on the display by showing selected Rope No earlier used rope for about 2 seconds e g The unit is turned off by pressing and holding the ON OFF button for about 1 second The unit will also be automatically turned off if any of the buttons not been activated within a programmable time The time can be set between 1 and 60 minutes and is done according to item 6 1 7 46 8 540 839 00 7 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 PiAbBb Force Measurement ENTER ZERO 6 1 2 ZERO When installed on the competely slack rope the RTM should indicate zero on the dis play otherwise you have to zeroize the instrument When you set to zero hold the RTM with the tightning device hanging vertically or put the RTM in this position on a slack rope The instrument is zeroed by pressing and holding the ENTER ZERO for about 2 seconds The display will indicate This zero setting remains saved even if the RTM is turned off This zero setting sho
4. TM 20 D Users Manual BA 7047be ba7047be vp 040216 IARE Accept by pressing the ENTER ZERO button for about 2 seconds until a colon is lit up on the left side of the display e g That is the indication of that the stored Rope No 3 has been opened You can cancel the selection and go back to previous rope by pressing ON OFF The selected rope will remain in use even if the unit is turned off 6 1 7 Automatic Turn OFF GFF Selection of turn off time To save the battery the instrument will be automatically turned off if no button is activated within a programmable time The time can be set to max 60 minutes and is done when you start up the RTM UNIT ON OFF The display will first indicate and thereafter XX is a number between 1 and 60 minutes Use the PEAK button to increase or the UNIT button to decrease until the preferred number of minutes is displayed Accept by pressing the ENTER ZERO button for about 2 seconds until a colon is lit up on the left side of the display That is the indication that the time has been stored in the permanent memory The time will remain in use even if the unit is turned off You can cancel the selection and go back to previous time by pressing ON OFF ENTER ON ZERO OFF 6 1 8 Serial Number and state of revision If the ENTER ZERO button is held while you start up the RTM is started the serial number e g will be displayed for about 1 5 seconds and thereafter the state
5. a7047be vp 040216 Sake The RTM 20 D is able to contain up to 10 different tee RTM 20D sn XXXXx ees calibrations Norm Unit ton metric Sel rope PEAK ON OFF Toggle Confirm ENTER ZERO Diameter Type Area mm Cal Cap 100 l e measurements can be done on 10 different ropes Rope No without being forced to use conversion 7 3 1x7 31 7 1 5 ton tables On the display you 9 2 1x7 51 7 3 0 ton get the right tension for 10 6 1x7 68 6 4 0 ton hege MODES 13 4 1x7 102 0 5 0 ton With the Rope List 15 4 1x7 143 6 5 0 ton attached to the instrument 17 7 1x7 183 0 5 0 ton you can select the correct Rope No calibration In order to strongly increase the accuracity of Rope List example the readings each rope is Max Cap RTM s Max Capacity calibrated at four points These are 0 30 60 och 100 of Cal Cap Cal Cap Max calibrated capacity for each rope Max capacity range of RTM 20 D 2 5 10 or 20 ton 2 Technical specification RTM 20D Max Cap ton Resolution guidance Normally separatly set for each Rope No Cal Cap kg Rope dim interval approx 6 13 mm Rope dim interval approx 9 19 mm Main dimensions RTM 20 D Weight RTM 20 D Main dimensions Transp Case Rope dim interval approx 13 27 mm mm LxWxH 685x140x380 kg 6 2 mm LxWxH 760x170x400
6. ba7047be vp 040216 Rev godk PIRE 990129 Sign L Q Kontr HG Godk IH Force Measurement PIAB RTM 20 D with microprocessor Users Manual Version 1 3 46 8 540 839 00 1 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 CONTENTS page 1 General 2 2 Technical Specification 3 3 The RTM 20 D main parts 4 4 Function 5 5 Measuring Practice 6 5 1 General 6 5 2 Various types of ropes 6 5 3 Measuring on a tensed rope check 6 5 4 Slack rope to a specified tension 6 6 Handling 7 6 1 How to use the push buttons T7 6 1 1 ON OFF 7 6 1 2 ZERO 7 6 1 3 PEAK peak value A 6 1 4 UNIT alternative unit 7 6 1 5 Low battery indication 8 6 1 6 Select Rope No 8 6 1 7 Automatic turn off 8 6 1 8 Serial number and state of revision 8 6 1 9 Overload 9 6 2 Use 10 6 2 1 Before Use 10 6 2 2 Use Measuring 10 6 2 3 After Use 10 7 Error Codes 11 1 General Pins The PIAB Rope Tension Meter RTM 20 D is an instrument specially designed for measuring the tension in different kind of ropes The measurements are made accurate and swiftly somewhere on the tensed rope whithout any extra preparations off loading e t c The measurements can be done on ropes with different diameters and different designs The ropes can be made of steel metal or plastic material and used as Guy wires suspension wires support wires for cationary systems e t c 46 8 540 839 00 2 12 RTM 20 D Users Manual BA 7047be b
7. e of the RTM the max rope dimension diameter is engraved decided from the range of the outer rope supports The limit for usable min rope dimen sion is more approximate You can find some guidance under Technical Data chapter 2 For multistrand flexible ropes you normally obtain good accuracy even if the diameter or and the number of strands differ some from the calibration rope When it comes to measurements on rigid ropes with few strands e g stay ropes the non accuracy will be large if the diameter or and the construction of the rope differ It is specially obvious for thick stiff ropes You get the best accuracy when measuring on a rope identical to the calibration rope 5 3 Measuring on a tensed rope check The instrument is normally calibrated for measuring on an already tensioned rope according to method 7 above First you select correct Rope No depending on which rope you are going to make measurements on The RTM then should be mounted tightend to the tensed rope The measurement result on the display shows the tension force in the rope It is often suit able to perform a few more measurements at different spots on the rope 46 8 540 839 00 6 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 Sake Force Measurement 5 4 Slack rope to a specified tension Select Rope No Install the RTM on the slack rope Load the rope until the RTM shows approx 90 of desired end value Loosen the
8. o 20 1 The resultant force affects the pull rod which is firmly connected with the flat centre sup port The pull rod affects in its turn the load cell which gives an electrical signal which is proportional to the force The signal is amplified converted and indicated on the LCD display of the instrument The Load Cell The load cell is of the type parallelogram of flexible beam in toughened steel It is pro vided with four adhesive type strain gauges foil gauges where all the wires are in the same longitudinal direction figure 4 4 The load cell has supports in the end points and will therefore bend when the pull rod is loaded figure 4 3 p UES O 5 4 4 46 8 540 839 00 5 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 SA 5 Measuring Practice 5 1 General Measurements using the RTM 20 D can be made in two different ways 1 The rope to be measured is loaded to the force X The RTM is installed and the tension value is read on the display 2 The RTM is installed on the rope when it is slack Then the rope is loaded to the force X After that the tension value is read on the display Experience has given that a better measurement result is obtained when using method 1 above All RTM s Rope No s are normally calibrated for measuring according to method 1 i e measuring on an already tensioned rope 5 2 Various types of ropes On the sign at the handl
9. ort 5 without being deformed 6 2 3 After Use Dirt in the threads of the tightening screw 2 must be removed Lubricate if necessary Clean the instrument and check the battery condition Keep carry the instrument in the transportation case provided 46 8 540 839 00 11 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 SA 7 Error Codes The following error codes can be displayed at start up or while in use The error codes is useful if the unit must be sent away for service maintenance Code Explanation Measure Lob Too low battery for reliable measurements Change battery Internal error EEPROM memory Contact service CE2 Internal error RAM memory Contact service 46 8 540 839 00 12 12 RTM 20 D Users Manual BA 7047be
10. sed This is indicated by that the LOBAT indicator is lit and the och prefix b is viewed before the voltage e g Lb7 50 LOBAT 6 1 5 Low Battery Voltage The battery voltage is continuously measured and the LOBAT indicator will lit up when the voltage drops below approx 7 0V At that point you will have a maximum of two hours of operation left from a lithium battery or app 1 hour from an alkaline battery If the battery voltage drops to low app 5 6V an error message will be displayed for about 4 seconds and after that the unit is turned off automatically This ensure correct function during measurig Change battery 6 1 6 Select Rope No Ore The RTM 20 D can have up to 10 different calibrations 10 different type of ropes These are stored in positions called Rope No 1 2 9 0O You have to select the right Rope No for your measurements look at the line list If you want to use last used Rope No you just turn on the RTM with the ON OFF but ton If you want to select another Rope No turn on the RTM according to PEAK ON OFF The display will indicate last used Rope No e g L 2 Use the PEAK button to increase or the UNIT button to decrease until the preferred number is displayed Only the programmed and calibrated Rope No s will be available The Rope No and corresponding rope type are presented in the rope list attached to the instrument 46 8 540 839 00 9 12 R
11. uld only be done when the rope is untensioned PEAK 6 1 3 Peak Value highest displayed value The instrument stores automaticly the highest displayed value This peak value can originate from any of the different Rope No s This peak value remains saved even if the RTM is turned off To display peak value press and hold in the PEAK button When the button is released the display will indicate the present tension value Do not forget to reset the Peak Value before doing new measurements To reset the peak value do the following PEAK ENTER ZERO i e press and hold in the PEAK button press the ENTER ZERO button too release the ENTER ZERO and PEAK buttons The peak value is also resetted if the instrument is set to zero 46 8 540 839 00 8 12 RTM 20 D Users Manual BA 7047be ba7047be vp 040216 PiAbBb UNIT 6 1 4 UNIT Alternative Unit The UNIT button is used to change between normal unit and alternative unit The alternative unit mode is indicated by a flashing colon on the left side of the display The RTM can e g have normal unit in ton and alternative unit in KN To get the tension displayed in the altenative unit the electronics multiply the normal reading by a programmed factor The factor can only be changed in the calibration mode If the UNIT is held in for about 2 seconds the display will first indicate the present Rope No for 2 seconds and then the battery voltage until the button is relea
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