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| | | General Information | | |
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| | | Lab Services Quality Certification Lab Continued | | |
| | | Recommended Sensor Straight Length Required for Calibration | | |
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| | | | | | | | | | | | | | Length in. (mm) | | | | Temperature °C (°F) | | Minimum | RTDs Maximum | | | | -195 only (-320 only) | 6 (150) | 60 (1525) | 6 (150) | 60 (1525) | | | | -В0 to 290 (-110 to 550) | 6 (150) | 60 (1525) | 6 (150) | 60 (1525) | | | | 290 to 1090* (550 to 2000*) | 15 (3В0) | 10 ft (3 m) | 15 (3В0) | 10 ft (3 m) | | | | Above 1090 (Above 2000) | 1В (455) | 10 ft (3 m) | NA | NA | | | | | | | | | | | | |
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| | | *In this temperature range some sensors longer than 6 in. (150 mm), but shorter than the stated length minimum of 15 in. (380 mm) can be calibrated. Please call Lab Services to see if your sensor meets the necessary criteria. | | |
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| | | Thermocouple Calibration Watlow offers testing for application temperatures other than the standard points in a range from -195 to 1700°C (-320 to 3092°F), depending on material. We do not recommend use outside of the temperature limits of ASTM E 230. | | |
| | | Existing EMF data is available from initial testing of base metal thermoelements and from sample testing of manufactured lots of finished products. Data is at specific standard test temperatures for each thermocouple type, but may not be available on all lots. | | |
| | | A lab service technician uses a metallurgical industrial microscope to examine the microstructure of the metallic components in our mineral insulated metal sheathed cable, XACTPAK. | | |
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| | | | | | | | | | | Calibration* (Thermocouple Type) | Temperature °G (»F) | Specifications | | | | | | | | E, K, J, N, T | 0 to 1260 (32 to 2300) | ASTM E 207 ASTM E 220 ASTM E 230 | | | | B, R, S | 0 to 1650 (32 to 3000) | | | | E, K, N, T | -195 plus -В0 to 0 (-320 plus -110 to 32) | | | | | | | | | | |
| | | See the Application Hints section for Tolerances on Initial Values of EMF vs. Temperature for Thermocouples chart on page 17. | | |
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| | | *Maximum temperatures vary depending on thermocouple type. | | |
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| | | Watlow RTD calibration is useful for defining the exact temperature coefficient of the sensor. Coefficients are obtained by calibrating the RTD at a cryogenic temperature, 0°C, 100°C and a high temperature that cannot | | |
| | | exceed the maximum temperature capability of the RTD. Through the use of the coefficients, a resistance output table in one degree (°C or °F) increments can be generated for the entire temperature range of the RTD. | | |
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