Isotemp
®
Muffle Furnace
550 Series
Instruction Manual
Model 14
Catalog No. 10-550-14 & 14A
Model 58
Catalog No. 10-550-58
Model 126
Catalog No. 10-550-126
83854 • 04/11/06
Page 1: ...Isotemp Muffle Furnace 550 Series Instruction Manual Model 14 Catalog No 10 550 14 14A Model 58 Catalog No 10 550 58 Model 126 Catalog No 10 550 126 83854 04 11 06...
Page 2: ...peration 8 Power On Reset 8 Entering a Set Temperature 8 Setting the Display Offset 8 Example Offset 9 Open Thermocouple 9 Over Temperature Indicator 9 Service 10 Replacing a Heater 10 Replacing the T...
Page 3: ...on without this information When operating the furnace always observe the following Safety Precautions Wear insulating gloves Use tongs Use safety goggles Never stand in front of an open furnace Use t...
Page 4: ...A heater LED located to the left of the tem perature display indicates when the heater is being ener gized For operation with chamber atmospheres other than air N2 C02 etc external gas supplies connec...
Page 5: ...the furnace may be located in a fume hood if samples are expected to produce toxic volatiles Unpacking Fisher Isotemp Muffle Furnaces are shipped in a single carton After unpacking locate each item s...
Page 6: ...oute free end of tube to fume hood or other outside vent If desired exhaust tube may be cut to length using a hacksaw INSTALLATION Warning Isotemp Muffle Furnace chambers contain alumina silicate cera...
Page 7: ...N 2 1 4 5 6 Hearth Plate Thermocouple Exhaust Port 7 1 Heater Indicator LED 5 Temperature Display Window 2 Mode Key 6 ON OFF Power Switch 3 Increase Key 7 Door Switch 4 Decrease Key See the following...
Page 8: ...he desired setpoint is reached 3 Press the MODE keypad again or don t press any keypad for 3 seconds and the setpoint will update with the setpoint indicated on the display Once the desired setpoint i...
Page 9: ...with the reference standard The control will then cut the heater ON time down so that the chamber cools by 5 C thus matching the desired setpoint Open Thermocouple In the event the thermocouple become...
Page 10: ...and set it aside 4 Loosen two heater terminal screws located on the terminal barrier strip Straighten the lead screws 5 Carefully withdraw the defective heater from the chamber Ceramic wool insulated...
Page 11: ...o as to expose the bottom perforated screen 4 Remove the screen and locate the thermocou ple connection on the back of the control board 5 Using a small flat blake screwdriver unscrew the terminals ho...
Page 12: ...oning persists check door switch Bad safety relay Replace safety relay K1 Bad solid state relay Replace defective SSR1 SSR1 Defective heater Replace heater element s element s Setpoint is higher than...
Page 13: ...ling Fan 120VAC SPN83915 240VAC SPN83916 Thermocouple Assembly SPN103058 Solid State Relay SSR SPN83917 Safety Relay SR SPN102260 Rocker Switch ON OFF Circuit Breaker 120V SPN95499 208V 240V SPN83914...
Page 14: ...ml 07 965C Crucible Porcelain 15ml 07 965D Exhaust Tube Assembly 10 490 10 Gloves 19 062 844 Grinding Mill 08 415 High Temperature Markers 13 382 16 Jumbo Crucible Tongs Stainless 15 207 Crucible Rack...
Page 15: ...26 10 C 18 F Average Temperature Stability 1 C 2 F Set Point Repeatability 1 C 2 F Set Point Accuracy Model 14 5 C 9 F Model 58 10 C 18 F Model 125 15 C 27 F Rise Time Model 14 15 minutes Model 58 126...
Page 16: ...AC 50 60 Hz Model 126 Cat No 10 550 126 208 240VAC 50 60 Hz Power Requirements Model 14 1200 Watts Model 58 3000 Watts Model 126 4600 Watts Chamber Volumes Model 14 0 14 cu ft Model 58 0 58 cu ft Mode...
Page 17: ...17 Wiring Diagram...
Page 18: ...18...
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Page 20: ...ve reasonable assistance to the purchaser in obtaining from the respective manufacturer whatever adjustment is reasonable in the light of the manufacturer s own warranty b The Company shall be release...
