Summary of Contents for Stork 41756
- Page 1 INSTRUCTION MANUAL FOR THE THERMOCOUPLE ATTACHMENT UNIT (TAU) Model Number: 41756 (100 – 125Vac) 41757 (220 – 240Vac) Manufactured in the United Kingdom...
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Page 2: Table Of Contents
Warranty Date of issue Sept 2008 © 2008 Stork Thermal Inspection Services (STIS) All rights reserved. No part of this document may be reproduced, stored in retrieval system, or transmitted in any form by any means, electronic, mechanical, photocopying, recording or otherwise without the prior, written permission of STIS. -
Page 3: Specification
Ref:TAU/MANUAL Issue: 09/2008 SPECIFICATIONS Operating Voltage………………… 100-125 or 220-240 Vac Power Consumption……………… 5.0 VA Battery Voltage…………………… 12 Volts Battery Capacity………………….. 2.7 Ah Thermocouple Diameters……….. 0.5, 1 & 2mm selectable Discharge Voltages………………. 50 / 70 / 83 V d.c. nominal Discharge Energy………………… 12.5 / 25 / 34.5 Joules nominal Battery Monitor……………………. -
Page 4: What The Tau Does
Ref:TAU/MANUAL Issue: 09/2008 WHAT THE TAU DOES Stork’s Thermocouple Attachment Unit (TAU) provides a reliable and extremely accurate method of temperature measurement of pre and post weld heat treatment processes by the direct attachment of thermocouples to the workpiece known as the capacitive discharge method. -
Page 5: Functions
Ref:TAU/MANUAL Issue: 09/2008 FUNCTIONS MAINS BATTERY MAN. AUTO. READY DISCHARGE CHARGE POWER START Part Function description Red DISCHARGE button for discharging power in manual mode. Green LED indicates when the output capacitor charging is complete and is ready to discharge. Red LED indicating that the unit is connected to the mains supply for the recharging of the battery. -
Page 6: Electrical Schematic Drawing
Ref:TAU/MANUAL Issue: 09/2008 ELECTRICAL SCHEMATIC DRAWING Magnet Pliers Capacitor Start Switch Discharge Switch Thyristor Fuse Mains Live Supply Neutral INPUT Earth Wire Colour/Termination Key Yellow Violet Green Green Orange Orange Black Pink (Cap +ve) Grey (Cap –ve) Blue Brown Page 6 of 17... -
Page 7: Safety
Ref:TAU/MANUAL Issue: 09/2008 SAFETY • The maximum Voltage between the application pliers and the return magnet is approximately 9 Volts d.c. • As with most electrical equipment, operators must ensure that they do not touch the exposed parts of (supply) pliers metal jaws, (return) magnet or work piece, especially with wet or damp hands and/or gloves when charging or discharging the output capacitor as this could result in a minor electrical shock. -
Page 8: Making A Thermocouple
Ref:TAU/MANUAL Issue: 09/2008 MAKING A THERMOCOUPLE Clean any loose scale or rust from the selected attachment area. Do not clean to bright metal. Also, never use a powered grinding tool as this can damage the weld. Clean the selected magnet position with a file or wire brush and ensure that the surface is free from oil or grease. -
Page 9: Operation Of The Tau
Ref:TAU/MANUAL Issue: 09/2008 Grip one of the bared wires and touch the end of it to the workpiece at the point where the thermocouple is to be attached. Do not touch the workpiece with the pliers. After attaching the thermocouple wire (as described in the OPERATION section) repeat the process for the second wire attaching it 5 or 6 mm... -
Page 10: Battery Monitor
Ref:TAU/MANUAL Issue: 09/2008 • To enable the unit to be continuously used the Discharge capacitor is automatically charged after every discharge. Note: The unit can be used without re-charge until the BATTERY LED is continuously illuminated. • There are two modes of operation of discharging, AUTO and MANUAL. -
Page 11: Maintenance
Ref:TAU/MANUAL Issue: 09/2008 • It is reasonable to anticipate 1000 discharges from a fully charged battery (on setting 2.). A normal period of time for battery re-charge is 12-18 hours. • Charging current is 400 mA maximum. • After the initial illumination of the LED it is still possible, with a battery in good condition, to achieve approximately 200 discharges on power setting 2. -
Page 12: Fault Finding
Ref:TAU/MANUAL Issue: 09/2008 FAULT FINDING FAULT CHECK ACTION TAU will not start. Check battery voltage Re-charge battery. is greater than 9.5V when start button is depressed. Check start push button for correct Replace switch. operation. Check continuity of Repair or replace loom between battery loom. - Page 13 Ref:TAU/MANUAL Issue: 09/2008 FAULT CHECK ACTION Capacitor will not Check magnet is Clean workpiece and Discharge. making a proper magnet reposition contact with the magnet on cleaned workpiece. area. Check T/C wire is Clean workpiece and making proper contact ensure end of T/C with the workpiece.
- Page 14 Ref:TAU/MANUAL Issue: 09/2008 FAULT CHECK ACTION Capacitor discharges Check Thyristor for Replace thyristor Straightaway. short circuit. If above is correct Replace PCB Capacitor Charging to Replace PCB incorrect voltage. Battery will not Check fuse. Replace fuse. charge. (No mains LED) Check Supply Plug into suitable voltage.
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Page 15: Ordering Replacement Parts And Spares
ORDERING REPLACEMENT PARTS AND SPARES When ordering any spare parts it is recommended that you refer to: (a) Type of unit described herein. (b) Stork Works Order reference number – Date supplied – (d) Your original order reference – (e) Your organisation full name –... -
Page 16: Replacement Parts List
REPLACEMENT PARTS LIST Order Description Ref: Fitted 504-089 3 core extension cable set (coiled) CAE010MO-7 Electrolytic Capacitor 10,000µF 110V ZY-41756 /1 TAU PCB complete TH-50RIA40 Thyristor 50RIA100 516-041 16A, 110V, 2P&E plug 530-006 Panel mounting fuse holder 20 mm 530-064... -
Page 17: Warranty
Issue: 09/2008 WARRANTY General Stork Thermal Inspection Services (STIS) guarantee that, subject to the conditions under herein, we will replace the goods described or repair the same, for a period of six months from the date of despatch, for any items with defects caused by faulty materials or workmanship.
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