TB 80 - TB 100 - TERMAN
TB 80 - TB 100 - TERMAN
TB 80 - TB 100 - TERMAN
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Bimetallic Thermometerstype :<strong>TB</strong> <strong>80</strong> - <strong>TB</strong> <strong>100</strong>Description and general specificationsOperating instruction and maintenanceFinished product quality control testspagepagepage0203041
Description and general specifications.THERMOMETER <strong>TB</strong> <strong>80</strong>/<strong>100</strong>These instruments are used to detect the temperaturein the oil filled transformers and aremade for outdoor mounting.CE GD°C1Nominal diameter : <strong>80</strong>mm. or <strong>100</strong>mm.AB3-20 120 2Temp. sensing system : bimetallic spring.Casing : stainless steel AISI 304.Locking clear window : glass or polycarbonate.Locking ring : stainless steel AISI 304.LMaximum temp. indicating pointer : fitted onthe window and resetable with an apposite button.Ø 12Standard measuring range : -20/+120°C and0/+120°C.Measuring accuracy : 1,5% of full scale value.<strong>TB</strong> <strong>80</strong> = DRWG. N° 1468<strong>TB</strong> <strong>100</strong> = DRWG. N° 1469THERMOMETER <strong>TB</strong>B <strong>80</strong>/<strong>100</strong>D12POS. DESCRIPTION1 temperature pointer2 red max temperature pointer3 max temperature pointer resetknob3BAE GCDn. A B C D E G<strong>80</strong> <strong>80</strong> 90 35 70 20 15<strong>100</strong> <strong>100</strong> 120 36 86 21 15FL<strong>TB</strong>B <strong>80</strong> = DRWG. N° 1497<strong>TB</strong>B <strong>100</strong> = DRWG. N° 14982
Operating instructions and maintenance.Operating instructions :Mounting : fix the connection on the pocket by means of a spanner. Attention don't try to tighten the connectionby rotating the thermometer's head as you may damage it !Once the connection is fixed you may need to position the dial to get the best readability. The positioning canbe made by unscrewing the small screw located on the hexagonal part of the connection, rotating the thermometerhead and retightening the screw.Max temperature pointer adjustment : can be made by rotating anticlockwise the knob located on the transparenttill the red maximum temperature pointer is in contact with the black pointer.Maintenance :No particular maintenance is required. Only, on regular basis, schedule inspections to verify correct functionand calibration.Typically a check of the precision must be done after 24 months.In case the transparent is dirty, thus reducing the readability of the dial, you can clean it with a soft cloth, waterand soap. Pay attention in case the thermometer is equipped with polycarbonate transparent as it can bescratched.3
Finished product quality control tests.Instrument calibration : carried out through thermostatic baths controlled by microprocessor based monitoringunits.The procedure varies according to instruments scale.The calibration procedure, being the thermometer scale : 0/+120°C is made using 5 different baths set at thefollowing temperatures :bath 1 = 0°Cbath 2 = 20°Cbath 3 = 50°Cbath 4 = <strong>100</strong>°Cbath 5 = 115°CCalibration procedure :Step 1 : a check is carried out to see whether the temperature taken by the instrument under test differs fromthat taken through the sample sensor by more than the 70% of the maximum allowed instrumentreading tolerance value.This test is performed by sequentially plunging the Bimetallic Thermometer bulb into successivetemperature increasing thermostatic baths : 0°C / +20°C / +50°C / +<strong>100</strong>°C / +115°C.Step 2 : the instrument is heated until the instrument pointer exceeds by 20% the angular full scale value.Step 3 : step 1 is repeated, but inversely.Check of instrument mechanical protection degree : IP 55.I EDITION AUGUST 2006Terman '90 S.r.l., Via Ghisalba, 13-20/21, 20021 Bollate (MI) – Italy. Tel: +39 02 38 30 37 12, Fax: +39 02 38 30 37 19,E-Mail info@terman.com, www.terman.comC.F./P. IVA IT 09970270154 – C.C.I.A.A. 1332904 – Trib. Milano Reg. Soc. 302729 – Cap. Soc. € 119.0004
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