Transcat, Inc. 4485227 Temperature Sensor

Product Highlights,Seven main features distinguish the 9118A from other high temperature calibration furnaces:,1. Suitable for a wide temperature range for most high temperature applications,standards and guidelines such as AMS 2750 and EURAMET cg-8 require thermocouples to be calibrated over the entire temperature range in which they are used. The 9118A has a temperature range of 300°C to 1200°C,making it suitable for most high temperature applications.,2. Flexible configuration to calibrate multiple thermocouple types,the 9118A furnace can be operated with or without an isothermal block,which increases the amount of calibration work that can be performed with a single furnace: by selecting the calibration parameters stored in the controller Quickly furnace configurations as needed to configure and insert or remove alumina ceramic isothermal blocks. Optimum Temperature Stability and Calibration Accuracy Uniformity,axial and radial uniformity,and constant temperature stability over time are key factors that contribute to accurate thermocouple calibration.,to minimize axial temperature gradients,three actively controlled heater zones compensate for the temperature difference between the central zone and the front and rear zones. Type S thermocouples are less likely to drift than other types of thermocouples and are used for zone control and cutoff. When using an isothermal block,axial temperature uniformity is ± 0.2°C over a 60 mm (2.4 in) area from full immersion to 1200°C. Radial (hole to hole) uniformity is ± 0.25°C at 1200°C and ± 0.5° over a furnace tube center diameter of 14 mm (0.6 in) when using an isothermal block.,when using an isothermal block,the temperature stability is ±0.1°C or better over the entire temperature range of the furnace.,in both operating modes,no other calibration furnace in the same class comes close to this level of performance.,4. Automatic set point control to increase laboratory productivity,a proprietary programmable controller available in nine languages (English,,French,German,Japanese,Korean,Portuguese,Spanish and Russian) that enables technicians to automatically Control up to eight set-point temperatures,temperature rate of,and duration of furnace control at each set point when the Fluke 1586A Super Data Acquisition is connected to the 9118A furnace via the RS-232 interface to further automation and data acquisition. . Super DAQ can be programmed to control the furnace's set temperature and collect data from all measured sensors once the furnace has stabilized within user-defined parameters. After collecting data at the first programmed temperature,Super Data Acquisition will advance the furnace to the programmed temperatures,collecting data at each set point. Once configured and testing begins,the technician can leave the job and conduct other activities.,5. Non-metallic blocks help minimize thermocouple contamination,and calibration furnaces with metal blocks can contaminate the thermocouple,causing its accuracy to drift over time. To reduce the risk of contamination,the furnace shaft and isothermal block of the 9118A are made of non-metallic ceramic alumina. This eliminates the need for expensive ceramic sleeves to protect the thermocouples under test,reducing the cost of ownership.,6. Deep immersion depth to support most thermocouple calibrations,industry standards such as AMS2750 recommend calibrating thermocouples at their normal operating depth of insertion. The 9118A has an immersion depth of 365 mm (14.4 in.) when using an isothermal block and 350 mm (13.8 in.) without the block. This immersion depth is sufficient for most thermocouple calibrations. The 40 mm x 700 mm (1.6 in x 27.6 in) open furnace tube can also be used to calibrate multi-junction thermocouples or sample test spools of thermocouple wire. Dynamic heater control and circuit breaker for reliability and safety,the 9118A controls heater power levels below 100% to prevent heater elements from overheating and increase heater reliability and service life. The 9118A has a built-in redundant over-temperature circuit breaker to ensure safe operation of the furnace. These faults include overheating,chassis thermostat,fan failure,control thermocouple failure,and user programmable circuit breakers.

Features

• Tube furnace structure (without isothermal block): The base material thermocouple is usually made of woven glass Wrapped in moldable materials such as fiber or polytetrafluoroethylene. During the calibration process,they are tied around a reference thermometer,held together with fiberglass rope or tape,and inserted into the tube furnace.
• Thermostatic block configuration: Metal or ceramic armored thermocouples are usually composed of precious metal thermocouples,so the calibration accuracy is required to be high. The thermostat block accommodates up to four 6.35 mm probes for improved heat transfer and temperature stability. This better balances the temperature between the reference probe and the UUT,which reduces measurement uncertainty compared to blockless calibration.
• Isothermal block configuration: Metal- or ceramic-sheathed thermocouples are generally constructed with noble-metal thermoelements and therefore have higher calibration accuracy requirements. The isothermal block,which accommodates up to four 6.35 millimeter probes,improves heat transfer and temperature stability. This better equalizes the temperature between the reference probe and the UUT,which lowers measurement uncertainty compared to calibration without a block.