Thermometer calibration procedure pdf. html>gt Click the appropriate service description and follow the instructions on that page. Thermometers will be calibrated using either the manufacturer's specifications or by comparing readings in ice water and hot water to a certified reference thermometer. Calibration of Thermometers We recommend the following Ice Slurry Method & Boiling Water Method 1. 1. Pack shaved or crushed ice into an insulated container, which is then filled with cold water to form a thick slurry. Uncertainties can be introduced by the reference thermometer and the calibration system. 0 ACCOUNTABILITY Manager – Quality control 5. , from 2°C to 5°C for thermometers in refrigerators, from -10°C to -20°C for thermometers in freezers, from 36°C to 38°C for thermometers in incubators). This calibration fulfills the requirements of ISO/IEC 17025-2005, 'General Requirements for the Competence of To calibrate your thermometer using the boiling point calibration method follow these steps: Heat a saucepan of water on the stove. Harris. Please note that NIST no longer calibrates Liquid in Glass thermometers. Check the reading after 1 hour. General Calibration / Metrology Topics ». Place the TMD at the center of the container to a depth of at least 50-mm (approximately 2 inches) and should be frequently agitated. 7. 8. The temperature reading on the NIST thermometer must be within the range at which the thermometer to be calibrated will be or is being used (e. probe and the UUTs in the temperature source in close proximity to one another. Place the reference thermometer and the laboratory thermometer to be tested in the bath and allow at least 5 minutes for stabilization. It is intended to provide the user with a consistent method, while remaining flexible in the choice of calibration equipment. For example, if you’ve just brought the thermometer out of a hot or cold automobile, or retrieved it from a walk- UNITEDSTATESDEPARTMENTOFCOMMERCE •LutherH. com info@thermoworks. calibrationproceduresheet. This conversion is performed in accordance with appropriate standard reference tables. Current Guides (available below) include: Linear measurements. Method B – Holding the thermometer upright, slowly, and gradually immerse only the bulb of the instrument. IANZ Technical Guides. Allow the instrument to equilibrate with the sample for at least one minute. Pressure Calibration ». Turn on the water system in the volume laboratory. Maximumself-registeringmercury-in-glassclinicalthermom- eters areno longertested atNBS. Thermometers must read within +/- 2 degrees F and will be recalibrated every 3 months or if damaged. A digital or instant read thermometer is electronic and cannot normally be calibrated. ) The conversion method (resistance to temperature, emf to temperature, etc. 2. 417. In any case, their integrity must be carefully maintained from preparation through analysis. The mounting device is what holds the infrared thermometer during a calibration. Avoid touching the thermometer to the bottom or sides of the glass. J. The first step in calibrating a thermometer is to determine if it's reading accurately. Try to keep them close together, in a circle, with the reference probe in the center. 5(a)(3) HACCP Records – The establishment shall maintain –. OptiMelt Calibration Calibration of the OptiMelt is very straightforward: The melting points of three Dec 23, 2019 · 1. Place the NIST reference thermometer in the water bath at the same time, to the same depth, as the bimetal coil thermometer. Connect the leads to the readout (s) ensuring proper 2-, 3-, or 4-wire connection. RF Calibration ». Thermometer Use & Calibration. Calibration Process: Place the standard PRT and the thermometer to be calibrated in the liquid bath or dry-well calibrator. These thermometers tend to be stable with time and use. 3 Blackbody Range: -10 °C to 100 °C Range: 100 °C to 500 °C Range: 500 °C to 650 °C Fluke 4180 Fluke 4181 Plate Blackbody with 10 cm to 15 cm target. Obtain the conductivity meter, a 1 000 mL flask, and the thermometer. calibration program. Scroll to Laboratory and Industrial-Grade Thermometers and click. To calibrate your digital instant-read thermometer, read the manufacturer’s instructions. Fit the data. The thermometer response function converts the detector signal to a temperature reading in a nonlinear way. 2. Balance calibration. Place the reference probe and the UUTs in the temperature source in close proximity to one another. Wise. pdf The Second Calibration with Increasing Pressure. Figure 3. (link is external) , 2019, Calibration Procedures for Weights and Measures Laboratories, Georgia L. The thermometer should register a temperature of 32 measurement. Aug 2, 2022 · The Fluke 1551A "Stik" Thermometer provides a temperature range—50 °C to 160 °C (-58 °F to 320 °F). Repeat the procedure for the additional temperatures. Allow at least 30 seconds to stabilize the reading. 2 Blackbody 2. Allow the temperature readings to stabilize for 15 to 30 seconds. It offers a wide measurement range, a 10:1 distance–to-spot ratio, a targeting laser, and user-selectable from Fahrenheit to Celsius temperature scales. Electronic thermometers using analog or digital readout. V. Rinse the 1 000 mL flask. This is an especially important consideration when bringing a thermometer in from the outside. II . Take the second series of calibration at 500, 600, 700, 800, 900, 1000 and 1050 hPa while increasing the pressure. Aug 1, 2019 · There are two methods which can be used to calibrate thermocouples, thermometers and temperature probes; tolerance testing and characterisation testing. Record the temperature of both thermometers. Field calibration is the process of using a calibration source to verify an 7. Set up for ice water calibration for a dial thermometer Do not remove stem from the ice mixture when you are calibrating. into a solution of dry ice and alcohol contained in a beaker. calibration. 1 Reagents. 5. For best accuracy with modern equipment choose characterization. Remove probe from its storage container, rinse with deionized water, and remove excess water. Reread the thermometer after calibrating and record the temperature readings. This work instruction can be applied to the verification of new and for the calibration of liq- uid-in-glass thermometers, with the measuring range of –100~+600°Cfor industrial . Allow the buffered standards to equilibrate to the ambient temperature. Place the dial thermometer and the thermocouple probe in each cup of water until the thermometer reading remains constant (approximately 30 seconds). , Suite D Alpine, UT 84004 ph: 800-393-6434 fax: 801-756-8948 www. 1 Scope. 0 PROCEDURE 5. Measure the reference prob. 5. If the thermometer does not read 32°F, it requires recalibration. Perform a five point upscale and downscale test. Effective Date 2002 Revision 00. PCR assays. Subject. NCSLPH “Thermometer Calibration Procedure”, Document (s): Temperature Calibration Equipment: A Technician's Guide (1. 4 cm). It should be within 1C of 100C or 2F of 212F. 1 Calibration Procedure 5. Immerse the stem to a minimum depth of 21⁄2 inches (6. Ice Water To use the ice water method, fill a large glass with finely crushed ice. Klein Tools IR1 is an entry-level infrared thermometer with targeting laser. Accurate thermometers can be used as a reference thermometer (e. Purpose. Go to Shop NIST web page. Down arrow for Calibrations. NBS Handbook 145, 1986, Handbook for the Quality In addition to comparison calibration thermometers can be calibrated at fixed points. These thermometers have calibration slope and intercept. GENERAL SPECIFICATIONS - IR1. This procedure specifies the schedule and requirements for maintenance, performance, calibration, and verification of laboratory testing equipment to ensure compliance with ISO/IEC Sep 26, 2014 · 2. Use a calibrated thermometer. Tolerance testing. Typically, 30 minutes is sufficient. 62 MB) Have you ever been brought a new thermometer to calibrate, and asked yourself, “What am I going to need to calibrate this?”. For example, let’s look at calibrating a temperature probe. 2 This section may also be used as a guide by thermometer calibration laboratories in the development and The calibrator simulates the RTD resistance for the transmitter and displays the resulting milliamp output. 3 This guide is intended for use with dry-block temperature calibrators without the use of fluids or thermal contact-enhancing media over a range of -100 °C to 1700 °C. Sep 16, 2003 · [Show full abstract] calibration procedure is necessary whenever the thermometer operates in a different medium. 9. Application of the NZ Code of Radiology Management Practice. There are five basic steps to perform as listed below:Place the referenc. Many food thermometers have a calibration nut under the dial that can be adjusted. Temperature Calibration ». Immerse your instrument in ice water. Author. probe and the UUTs in the temperature source in close proxim-ity to one another. Calibrating a Thermometer There are two ways to check the accuracy of a food thermometer. the calibration access holes. The mount-ing device maintains the measuring distance and alignment of the infrared thermometer during calibration. Item Minimum Use Specifications Calibration Equipment 2. A. Insert the probe of the thermometer into the water. 0 SCOPE This SOP is applicable for calibration of the thermometer. ) The readout instrument (or temperature indicator) A thermometer can be calibrated either as a whole system (containing all the three above subsystems) or Instrument calibration is the process of comparing a scientific measurement instrument to a standard of known accuracy, to determine the reliability of the data the device is capturing. Type I, Class 1 thermometers (reference NIST Handbook 44) are total immersion types. Check the temperature at the same time as using another calibrated thermometer*. Intervals may be adjusted based on adequate data and criteria in Section 2. Measure and record the resistance of the UUT (s). We will be using a single point calibration since the environment that we will measure is the existing environmental condition in a stable room. Some of these reagents will be used to calibrate the equipment, while others will become an integral part of the sample itself. Calibration in Boiling Water 1. 0 RESPONSIBILITY Quality control executive 4. 05°C over its full range. roduct of the calibration. Calibration of a Liquid-in-Glass Ther- mometer. Apr 25, 2005 · Completed forms are SOP No. Check the temperature of boiling water*. Use a wrench to turn the calibration nut. 2, Division 6, Clause 22, states that: " a food business must at Oct 6, 2009 · NISTIR 8250. If the procedure fails to recommend the use of a total or partial immersion thermometer, then the decision should be governed by the physical limitations in thermometer placement. However, for thermometers with contraction chambers and fine graduations, full recalibration is likely necessary for the best performance. 3. Completed Point Check Calibration of Laboratory Thermometers Record Management ; forms are archived in the Point-Check Calibration of Laboratory Thermometers Record Book. Oct 15, 2018 · The better the calibration uncertainties the tighter the guard band can be. Environment: Indoor or outdoor. Main St. Øóºìm | G˜Ï=|¨Lõ ]S~42*% *ù Iú VÆì=l¢ ŒR× KíÚƒ %‚8‡ÖÈCä­ÔÑ' ¯&KZ,r¶ú\ Kž ô6zöJó \²KƒoÎûIÒàš÷ ¹àC N”}ÐÚswÖ+r¡ý^Í } Ú }« ßÝ Ü§ ù …5]`6 òÔ Oå ã¸a€ Ùµ ¶ §ŠO€þ®š& è|— ~þ‚‚/åôHžt® -ÕZÂ!qÉm4 k\̼ž ‹2‚ ,é ðs‰ÛÑ U×~˜øªñá]OãBšÓh ç  u q 3. Wait a minimum of 30 seconds before adjusting. A device should be used to determine measur-ing distance. com CALIBRATION Use a clamp to submerge the thermometer and reference the hot water. Astin,Director Calibrationof Liquid-in-GlassThermometers JamesF. and determine. Note: It may be necessary to prepare both a water bath and an oil bath in order to test the range 3. Ensure it is immersed two inches in cold water. pdf), Text File (. After placement in ice and water, a thermometer reading should stabilize in about 30 seconds. Calibration Method: Jun 1, 2001 · The NIST Industrial Thermometer Calibration (ITC) Laboratory provides calibrations of industrial thermometers over the range from 196 C to 550 C. Note 1: This practice does not apply to used thermocouples. May 11, 2015 · CALIBRATION REPORT FOR DIGITAL THERMOMETER The instrument or device identified below was examined and calibrated in ICL's metrology laboratory, using NIST traceable standards, following the calibration procedure referenced below. The Fluke 1551A delivers repeatable temperature measurements accurate to ±0. 1 The thermometer for calibration shall be mercury in glass type. To describe the procedure for calibration of the thermometer. FREE - Calibration Procedure Model: Click on the pdf below to download your free calibration procedure. txt) or read online for free. A Procedure for the Effective Recalibration of Liquid-in-Glass Thermometers. Caliberation of Thermometer - Free download as PDF File (. 22 In the calibration procedure the simulator is set at the required calibration point. Using a flat-head screwdriver, slightly turn the calibration adjustment dial accordingly to change the readout value. Method A – Attempt to force the liquid together by tightly holding the thermometer while slinging it in a circle and jerking to a stop. A thermometer consists of: The measuring element (resistor, thermocouple, etc. Allow it to sit for a few minutes until the reading stabilizes. thermoworks. It should stabilize at 32°F (0°C). When the temperature is at the desired level, the thermocouple to be calibrated is used to measure temperature along with a known The calibration of the thermometer readings according to Methods 1 & 2 is a convenient wa y to check the proper operation of the block’s thermometer but does not lead to a certifiable calibration procedure according to GLP and GMP practices. Once the distilled water has reached the reference temperature, place the thermometer to be calibrated in the hot water bath. Select measurement mode. Jun 8, 2021 · To calibrate a PRT, PT100, or RTD using a dry-block calibrator or calibration bath, there are five steps you usually need to follow: Place the reference probe and the probe you’re calibrating in the temperature source. 3 This standard does not purport to address all of the safety concerns, if any, associated with its use. Power on your Temperature Calibrator and set the desired temperature. Check the temperature reading. Mar 30, 2018 · This study presents the reliability of a Pt-100 Platinum Resistance Thermometer (PRT) measurement results which can be described according to calibration and statistical methods. The basic infrared thermometer procedure for a calibration point should include the following steps: If a purge device is used, set up the purge. Selection of Calibration Points: Choose temperature points relevant to the thermometer’s intended use. Place the thermometer probe into boiling water for at least one minute taking care Tiquid-in-glass thermometers that have a 0 °C [32 °F] reference point. It should give you the same temperature. If the reading isn’t accurate, then the thermometer needs to be adjusted and retested until it’s correct. Calibration results are recorded on a log. An inventory of thermometers requiring vendor calibration will be Apr 29, 2009 · How to Arrange a Calibration. 6-02-11. [1] [1] Calibrate with an IR thermometer that has low uncertainty such as KT19 and TRT. Insert the end of the sanitized thermometer into one of the following locations, 4. 1 Blackbody 2. Top 3 Calibration Forms: 1) Calibration Form, 2) Equipment Calibration Log, and 3) Thermometer Calibration Log. Stir slightly and wait for the temperature to stabilize. 1, 7. Both types of thermometers can be used in a number of different applications. Title. This calibration data must also appear in your lab notebook (calibration curves and linear regressions will be required for the lab report). 1 This section contains the specific technical criteria in accordance with which a laboratory should demonstrate that it operates, if it is to be Recognized as competent to carry out thermometer calibrations. Adjust a dial thermometer by turning the hex Uncertainties can enter the calibration equation from various sources. It involves measuring the thermometer's readings at two known temperature fixed points (ice point of water at 0°C and boiling point of water) and using the results to construct a calibration curve. Open the pure water system valve and let it run for approximately 5 to 10 seconds, rinse out the 1 000 mL flask several times and then fill it to approximately 1 000 mL. If no initial measurement assurance data is available, the laboratory’s Technical Manager should assign initial intervals based on guidance and limits provided in this GMP. Mar 24, 2020 · Absence of Control Charts or Measurement Assurance Data. If the thermometer does not read between 30o and 34oF adjust to 32oF. Adjust the RH calibration pot in 1⁄2 turn increments, waiting for the display to update after each adjustment, until the reading is within the accuracy specification. Using The Ice-Water Method To Calibrate A Thermometer: Start by filling a large glass with ice and add cold tap water to the tip. Articles and Education. Thermometer calibration. This document provides guidance on calibrating low-temperature infrared thermometers. The SOP outlines procedures for calibrating thermometers used in food processing. The ice-point method is the most widely used method to calibrate a thermometer. The thermometer should touch the glass at all Mar 8, 2024 · Her years of experience in one of the world’s leading business news organisations helps enrich the quality of the information in her work. Calibrations are performed by both Calibration Procedure 1. It is advisable to contact theNBSliquid- in-glassthermometrylaboratory Thermodynamic fixed-point calibration is the most accurate way to calibrate a thermometer. Platinum Resistance Thermometer calibration procedures are similar whether the method selected is characterization or tolerance testing. Stirred bath or furnace method: The option between stirred bath or furnace is used based on the temperature requirements. Repeat the RH accuracy verification procedure. In most applications, a thermometer should be within ±1°F or ±0. Using a small hex wrench, adjust the hex nut under the head of the thermometer until the needle points to 32°F (Figure 3). 1 Scope. Adjust the thermometer according to the temperature reading of the reference. Note: NIST Interagency or Internal Reports (NIST"IR") can be obtained by going to the Weight and Measures Publications page. Before the calibration, the infrared thermometer should be allowed enough time to reach the temperature of the laboratory, typically 15 minutes. SOP 1 Preparation of Calibration Certificates • 2018 Updated entire SOP based on changes to ISO/IEC 17025:2017, Section 7. Annual Thermometer Calibration Reports for NIST traceable thermometers (sections 7. (2000 m) 1. To define the verification procedure on thermo-hygrometers with a probe using a Fluke 971 as the reference standard. Calibration is more complex for IR Insert the thermometer probe into the center of the glass of ice water. Page 3 of 13. Common points include the freezing point of water (0°C/32°F) and the boiling point (100°C/212°F), among others. , National Institute of Standards and Technology, NIST). A Policy Guide may set forth new, or clarify existing, general policies, procedures, and requirements. It begins with an overview of infrared thermometry principles, including how IR thermometers measure temperature based on the emitted electromagnetic radiation. The method is straightforward with no data fitting or complex calculations required. Wait for at least three minutes and then record the reading. 1. 5°C when compared to the reference thermometer used for calibration. Using a flat-head screwdriver pry the back cover of the digital thermometer of the back plate of the housing. g. This guide is intended to help you work out the kind of equipment you need for your particular calibration situation. Bring a clean container of water to a rolling boil. Don't forget to record all the results every time you check your thermometers. 1 This test method provides guidelines and basic test methods for the accuracy verification of infrared thermometers. 2 This practice covers reports of calibration for radiation thermometers, liquid-in-glass thermometers, resistance thermometers, digital thermometers, and new thermocouples. The different types of thermometers include liquid-in-glass (LiG), thermistors, thermocouples (<300 C), and industrial platinum resistance thermometers (IPRTs). Individual thermocouple probes are calibrated in some cases, while entire rolls of wire require certification in other cases. After finishing the calibration at 500 hPa, decrease the pressure further to 498 hPa and leave it for 10 minutes to check leakage from the pressured pipes. Calibration Software ». The infrared thermometer should be at or near the room temperature where the test will be conducted. Calibration procedure Preparation. Flow Calibration ». Use SafetyCulture app to record calibration logs using a handheld device. It should read between 99°C and 101°C. · Cold Temperature Check. 3 In between the formal revisions of NIST Handbook 150, NVLAP may publish NVLAP Policy Guides to augment NIST Handbook 150 and give notice of any changes on the requirements for accreditation. Immerse the food thermometer stem a minimum of 2 inches into the mixture, touching neither the sides nor the bottom of the glass. Assessment Guidelines for Technical Experts. Bring the water to a rolling boil. Thermometer Calibration Procedure. Put the probe into the water, stir and leave it to sit for a couple of minutes. Check the package for instructions. Procedures will be consistent with SOP ADM-07, Non-Conformance Reports. There are five basic steps to perform as listed below:Place the referen. The calibration principle is based on the verification of this conversion process by the direct measurement of the electrical signal produced by the simulator. It’s usually reserved for lower accuracy To calibrate a thermocouple to ASTM specifications is to determine that it follows the standard model. Data ; 1. Scroll to Thermodynamic and click. Metrology, Metric and Weights and measures. Dec 7, 2021 · 5. Tolerance testing is the most common and easiest to perform method of calibration, especially within industrial applications. Class 2 liquid-in-glass thermometers, may be of the total or partial immersion type. 4 In this guide, the essential features of dry-block calibrators used for the purpose of thermometer calibration in either the direct or comparison mode are described. Measurement uncertainty in chemistry and microbiology. Non-adjustable thermometers should be removed from use until they have been professionally serviced. However, recording multiple calibrations is a time-consuming task, and not always Mar 11, 2022 · Submerge the thermometer probe until the immersion mark without touching the bottom of the glass. Conclusion. Electrical Calibration ». HACCP Records Requirement. If the thermometer does not read 32°F (0°C), use a wrench to adjust the calibration nut until the reading is correct. Sanitize stem of clean thermometer with an alcohol wipe or insert stem into sanitizing solution for at least 5 seconds, then air dry. Calibrate thermometers on a weekly basis, or whenever they are dropped or suffer a shock. bulb-volume change,ice bath,ice point,ITS-90,liquid-in-glass thermometer,recalibration,thermometer. 2, and 7. Calibrate digital thermometer 1. Add clean tap water to the top of the ice and stir well. The bi-metallic stem thermometer is a mechanical thermometer which must be calibrated regularly. Operating Altitude: 6562 ft. To ensure the readings are correct and Jul 29, 2021 · 6. The following simple instructions should help you perform a field check of an IR thermometer at moderate temperatures. Records documenting the monitoring of CCP's and their critical limits, including the recording of actual times, temperatures, or other quantifiable values, as prescribed in the establishment's HACCP plan; The calibration of process-monitoring The ice-point method is the most widely used method to calibrate a thermometer. The food standards state in Standard 3. To do this, insert the thermometer into the ice water without touching the sides or bottom of the container. This document describes calibrating a stem thermometer. In some critical applications calibration against a certified reference Insert meter’s sensor into a 75% salt reference bottle or humidity chamber. Clean the probe end with de-ionized water and immerse into sample. References: CLSI GP31-A, Laboratory Instrument Implementation, Verification, and Maintenance; Approved Guideline, April 2009 . Hodges,Secretary NATIONALBUREAUOFSTANDARDS•A. Measure the reference probe and determine the temperature. Keywords. Allow the thermal radiation source to stabilize at its set-point. It’s important to note that the boiling point of water may vary with altitude, so adjust accordingly. If available, set the infrared thermometer’s reflected temperature setting to the reflected For mercury-filled thermometers used at temperatures of 200 °C and below, a single point recalibration at the ice point (0 °C) may be used, and a full recalibration is not necessary. Nov 8, 2023 · Follow these steps to perform the boiling water calibration method: Boil the water: Fill a pot or kettle with enough water to fully immerse the sensing area of the thermometer. Calibration of a Liquid-in-Glass Thermometer. 6. THERMOMETER CALIBRATION You can check your thermometer by: Check the temperature of ice-slush (slurry)*. The dial or bi-metallic stem thermometer and the digital or instant read thermometer. • Ensure the thermometer is NIST Traceable® or NIST Certified and remember, if your thermometer has bubbles or cracks that can not be fixed, it must be replaced. Wait for the water to come to a continuous rolling boil. Data Acquisition and Test Equipment ». In some cases, reagents are prepared prior to sampling. It is rated intrinsically safe for working in indoor or outdoor environments where potentially explosive gases may be present. (Brand, Product, Serial #) Determine the range of the thermometer, equally divide the range based on the scale, and choose at least three or more test points based on the user's needs. One method uses ice water, the other uses boiling water. 12. Perhaps the simplest example would be a flask of ice and water, at atmospheric pressure the temperature will be close to 0°C and thermometers can be checked not by comparing them to a second thermometer but directly to the “ice point”. Zero and span interact, recheck and adjust as required. The books are Mar 22, 2023 · Boil tap water and put it in a heatproof container. Thermometers should be calibrater regularly to make sure the readings are correct. It should read between -1°C and 1°C. 3) are stored in the Thermometers and Hygrometer Calibration Certificates notebook. It includes test set-up and calculation of uncertainties. 3. Follow by stirring the contents and allow them to sit for about three minutes. Type . Adding uncertainties of components together is referred to as an uncertainty evaluation. The FSANZ (Food Standards Australia & New Zealand) Food Safety Standards do not require thermometers to be re-calibrated. 1 This guide is applicable to the calibration, by electrical simulation and measurement of temperature indicators and temperature simulators intended for use with resistance thermometers or standardised thermocouples and of simulators which are intended to emulate the electrical outputs of resistance thermometers or standardised Jun 3, 2020 · Prep the measurement data sheet with the necessary information to identify the unit. There are two common types of calibration, field calibration and laboratory calibration. The mounting device may be a tripod, a fixture, or a hand. Correct the span at 90%. If not measuring in-situ, swirl the instrument in the sample for mixing and equilibration. 4. PURPOSE. SOP 2 Applying Air Buoyancy Corrections 2016 Check the Thermometer's Accuracy. onnect the leads to the readout(s) ensuring proper 2-, 3-, r 4-wire connection. Thermapen™ Calibration Procedure ZERO 32°F (0°C) SPAN 212°F (100°C) 270 N. Suspend the instrument away from the sides and bottom, if not in-situ, to observe the temperature reading. Nov 10, 2021 · 1. Once tolerance tested, the thermometer can be checked at the reference point to verify that it remains in tolerance. Thermmodynamics. EQ-02-03 Date Revised 04-25-05 Page 5 of 6 archived in the Point Check Calibration of Laboratory Thermometers Record Book. Nov 6, 2015 · To use the ice water method, fill a large glass with finely crushed ice. Fill calibration containers with the buffered standards so each standard will cover the pH probe and temperature sensor. Swindells roduct of the calibration. 2019 • Conformity Assessment criteria added to checklists and to example certificate (was already in the text of procedure). 4 and NIST recommendations. Zero is corrected at 10% input and adjusted for 10% output as shown on the milliammeter. kb va ck oe sz gt nb wp un by