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MODEL 970-1 & 970-2

CALIBRATION FURNACE

INSTRUCTION MANUAL

_____________________________________________________________________

158 Brentwood Drive, Unit 4
Colchester, VT 05446

Phone: (802) 863-8050
Fax: (802) 863-8125

[email protected]

www.isotechna.com

Isotech North America

Summary of Contents for 970-1

Page 1: ...CE INSTRUCTION MANUAL _____________________________________________________________________ 158 Brentwood Drive Unit 4 Colchester VT 05446 Phone 802 863 8050 Fax 802 863 8125 sales isotechna com www i...

Page 2: ...M970 07 04 PAGE 1 MODEL 970 1 970 2 CALIBRATION FURNACE ______________________________ 1200 Deg C Three Zone Horizontal Tube Temperature Calibration Furnace Instruction Manual...

Page 3: ...n 14 10 Electrical Supplies 15 11 Furnace Operation Calibration 16 17 12 Calibration Performance Optimization 18 13 Safety Features 19 14 Automatic Calibration Furnace Control 20 Appendix 1 Furnace Di...

Page 4: ...ve materials or workmanship providing correct operation and safety procedures have been used In addition correct electrical and mechanical installation has been performed to avoid personal injury or f...

Page 5: ...ed in its use and good measurement practice It is essential personnel understand the hazards of this equipment when operating at high temperatures 100 to 1200 deg C and precautions needed in its use R...

Page 6: ...otective clothing as detailed under Safety Section 13 5 Operators must be suitably trained in the use and handling of high temperature items 6 Do not dismantle or open work inside this equipment witho...

Page 7: ...of the main furnace tube This enables uniform radial temperatures for a series of holes on a common P C D pitch circle diameter using a centrally placed equalizing block in the centre tube This 970 f...

Page 8: ...e using a metal equalizing block of 200 to 250mm length This separate work tube is easily replaced compared to the main outer work tube which is wound with the heater windings This also enables a rang...

Page 9: ...ing parts high reliability 9 Automatic 3 zone temperature control with individual adjustment of end zone power over temperature range to compensate for losses and provide very low horizontal temperatu...

Page 10: ...1500 to 2190 deg F within 0 35over 6 ins 0 18 over8ins Radially 100 to 800 deg C within 0 1 deg C 0 05 deg C 200 to 1500 deg F within 0 18deg F 0 09 deg F 800 to 1200 deg C within 0 2 deg C 0 10 deg...

Page 11: ...nt socket indication End Zone 2 x N type TC 1 in each end zone centre for end zone differential control 2 x separate end zone indication TC s on front panel positioned 2 1 ins 53mm from inside each en...

Page 12: ...rols on the end zone controllers are used to increase or decrease an offset control voltage This will raise or lower the end zone temperature to obtain a flat uniform temperature over the furnace leng...

Page 13: ...e power ON button with green ON lamp operates the 3 pole latching 20 amp per line isolation relay RL2 to the 3 separate furnace zone heaters and solid state control relays A separate furnace power OFF...

Page 14: ...ch furnace end plates to end of furnace over the protruding separate work tube from furnace end The metal end plate cap must be external to the furnace end Furnace end insulating plate is next to the...

Page 15: ...space for loading maximum probe length with a minimum distance to any other instruments or wall of 30 ins This allows heat generated from furnace at its maximum operating temperature to escape freely...

Page 16: ...phase supply previously requested a cable will be supplied and wired at factory from furnace control unit cable entry for connection to local supply box Using single phase supply Connect single phase...

Page 17: ...n in metal block Using high temperature continuously rated Kaowool to 1200 deg C insulate carefully the ends of the furnace to prevent heat losses particularly around air gaps where probes protrude Sw...

Page 18: ...d number of probes inserted To check and adjust trim the furnace end zone differential offsets insert a long TC probe into the centre hole of the equalization block in furnace It is assumed that the b...

Page 19: ...d zone controller differential offset adjustment To establish radial uniformities use two identical size and thermal properties probe which closely fit within 0 4 mm approx 2 diagonally opposite holes...

Page 20: ...endent over temp cut out to trip the supply For personal safety we strongly recommend the use of protective clothing including face masks or goggles In addition thermal gloves and or thermal insulated...

Page 21: ...nner will scan and record the reference and unknown probes The data at each temperature with probe serial number and customer reference is stored in a data file A TTI7 RW automatic report writer used...

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