Digital Thermometer Procedures

1. Sanitize the calibrating and repair area freeing the table of any dirt or stray chemicals.


2. Set-up and calibrate (on site/mail in) with reference thermometer traceable to Comark. Allow to adjust to room temp.


3. Ice Point Method:
   • Mix thoroughly crushed ice in distilled water=60% ice and 40% water in glass beaker
   • If the mixture does not reach 32 degrees F add more ice
   • Mix for 1 minute, let sit for 5 minutes
   • Place Reference Thermometer Probe in mixture-stir for 30 seconds, take reading and reference temperature
   • Probe can not touch bottom of cup
   • Probe should be immersed 2.5 inches
   • Place probe to be calibrated and serviced in mixture (probes should not touch)
   • Take reading


4. Boiling Point Method
   • Place distilled water in glass container and boil
   • Once boiling, place reference thermometer in boiling water
   • Boiling point temperatures in relation to Altitude:
     • Sea Level = 212 degrees F
     • 2,000 ft = 208 degrees F
     • 4,000 ft = 204 degrees F
     • 6,000 ft = 201 degrees F
     • 8,000 ft = 197 degrees F
     • 10,000 ft = 194 degrees F
   • Place probe to be calibrated and serviced in mixture (probes should not touch)
   • Take reading

< Back     Next >

© 2007 Carter Calibrations. All rights reserved.
Call us today! 703-675-5656.