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  • Getting temperatures right
    . The National Institute of Standards and Technology (NIST) publishes a standard temperature profile for each thermo-couple type. Variations in metal purity and poor alloy homogeneity can shift a thermocouple profile away from those standards. The problem becomes worse when there are long lead runs. High
  • AN107 Practical Thermocouple Temperature Measurements
    e ×. ×. ] in Eqn. 3 is. 0. Equation 4 can be mathematically rearranged to include. added to account for special effects. More details on this. the ice-point temperature (Tice). type thermocouple model are available from NIST web. site, Reference 1. V1 = S*(Tx-Tice) - S*(Tc-Tice) Eqn. 6. Cold
  • Maximizing Accuracy in Microinch Measurement
    effectives: • Understand factors that may limit measurement accuracy. • Read user’s manuals and understand instrument operation. • Test skills and knowledge periodically. • Attend seminars (NCSL, NIST, …). Equipment. Being sensitive to the factors discussed thus far will go a long way toward helping
  • Guide to Minimizing User Errors in pH Measurements
    with oxides on the surface of the pH glass. These slightly soluble carbonates. will be dissolved causing drift if exclusively used in such solutions (NIST traceable pH 10 buffer). Limited time exposure to bifluoride and/or bicarbonate solutions may be utilized to rejuvenate contaminated surface of pH
  • Single Supply Temperature Sensing with Thermocouples
    this organization that is pertinent to thermocou-. circuits. ples is the NIST Monograph175, “Temperature-Electro-. THERMOCOUPLE OVERVIEW. motive Force Reference Functions and Tables for the. Letter-Designated Thermocouple Types Based on the. Thermocouples are constructed of two dissimilar metals
  • Air Velocity Temperature Measurment All-in-One (.pdf)
    and -40 to 121°C (-40 to 250°F), respectively. To ensure. maximum accuracy, each FMA1000 is individually calibrated in a NIST traceable wind tunnel. FMA1000 Features. The design of the FMA1000 is well thought out and offers enough features to. accommodate most air velocity measurement and data needs
  • Flare Gas Flow Measurement and Control
    meter product. g Meet local environmental agency requirements for. accuracy and periodic calibration verification. lines suitable for flare gas system applications, its next-generation. ST100 Series Air/Gas Flow Meter (Figure 2) provides extensive. g NIST certified calibration for mixed hydrocarbon
  • Criteria for Obtaining Specified Humidity and Temperature Conditions
    and the. conditions of operation (temp. humidity range, cleanliness of atmosphere,. concentration of various chemicals). Typically a one-year calibration interval is. sufficient. Confirm that the calibration covers your operating range and is. traceable to N.I.S.T. (National Institute of Science & Technology