How to Calibrate and Verify a Heating Oven

Dongzkie

Involved In Discussions
#1
Hello guys. Just want to do a verification with our heating oven range is up to 150?C. I have here a digital thermometer, but I want to know if what type of thermocouple should i use during the verification, I need some 3 meters long thermocouple. Although I do have 1 meter long of type J and K but I have doubts in using it because I dont know there application type, I am afraid that the thermocouple will bend or deformed when I close the door of the oven. please need some advise. thank you.
 
Elsmar Forum Sponsor

dgriffith

Quite Involved in Discussions
#2
You don't say what kind of oven nor how large. Does the oven have a pass-thru access port? If not and you are going to run the TC where the edge of the door seal will crimp it, then depending on how soft the seal(s) are you may encounter errors. A crimped TC wire within a thermal transition zone is not good.
The TC sheath will need support inside the oven--clamps along the side-wall would do. You could even run it along the ceiling(roof) and let the end hang straight down at any location and whatever length you need. Otherwise, you could get support from an all-metal stand or two (or racks) placed inside during your test.

Don't forget to either calibrate the TC (calibrated accuracy) or use new TC wire (published limits of error). Also, your TC readout will add to the error of readings, so account for that.
 

Dongzkie

Involved In Discussions
#3
@dgriffith
yes thats what i mean, the TC might be crimped on edge of the ovens door during the verification. oven size was 824 X 1183 x 684mm. And i have checked that before the access ports but nothing, the TC will have to pass through the door.
 

dgriffith

Quite Involved in Discussions
#4
Well, for soft seals, the thicker the probe sheath and wire, the less likely to crimp badly, but more likely to allow leakage around the seal. 33"x 47.5"x 27" isn't too large a volume. What oven controller type do you have and how does it control--analog, digital, PID, Dead Band, etc.? Type of temperature probe it uses and location (PT100, TC, near a inner wall, next to any internal work lamp, etc.)?

There are many factors to consider--these are just a very few: Stability (better with PID), gradients (vertical and horizontal), temp controller and probe error, and control probe location may add additional errors if not placed where the 'product' is. Internal work lamps when lit are notorious for screwing with the temperature measurements.

Also consider that some test engineers require the air temperature surrounding the test article to be known, and some require the test article temperature itself to be known.

If you know something about the walls in your oven, you might pick one, drill a hole carefully through the outer wall, find the inner wall if unobstructed, and drill it to get a small opening to the inside. Run a TC into the chamber and seal the hole with high-temp epoxy, rubber gasket, etc.
 
Thread starter Similar threads Forum Replies Date
W How to verify/calibrate a Neptune Water Meter General Measurement Device and Calibration Topics 4
C How to Calibrate and Verify Torque Multiplier Gages General Measurement Device and Calibration Topics 6
S How to Calibrate or Verify Screw Pitch Gages General Measurement Device and Calibration Topics 16
J Work Instruction to Calibrate or Verify a Combination Square General Measurement Device and Calibration Topics 15
A Looking for a third party to calibrate our measure equipment - South Carolina General Measurement Device and Calibration Topics 6
I Can I Calibrate On Demand? General Measurement Device and Calibration Topics 9
S Calibrating our own equipment, can we? Micrometers to calibrate vernier calipers General Measurement Device and Calibration Topics 13
F Crimper Calibration - How do you Control & Calibrate your crimpers? Calibration Frequency (Interval) 13
P How to Calibrate a HP 3458A Digital Multimeter with Fluke 5080A calibrator General Measurement Device and Calibration Topics 1
B Choosing not to calibrate (IATF 16949) IATF 16949 - Automotive Quality Systems Standard 6
K New Kilogram - The process we use to calibrate the standards General Measurement Device and Calibration Topics 6
D How to Calibrate any Digital Sphygmomanometer under use for 2 years in a Hospital Forum News and General Information 1
L Re-calibrate after software update? Calibration Frequency (Interval) 3
J To Calibrate or not to calibrate electronics rack components Manufacturing and Related Processes 5
T How to Calibrate Taper Gages General Measurement Device and Calibration Topics 1
N Calibrate temperature on refrigerated Centrifuges? General Measurement Device and Calibration Topics 2
B Can we calibrate a standard pin with a gauge? General Measurement Device and Calibration Topics 2
D Lesser expensive to calibrate various test weights General Measurement Device and Calibration Topics 5
A How to Calibrate Laser Beam Tester & Radiation Monitor General Measurement Device and Calibration Topics 3
P How do you calibrate a VNA (Vector Network Analyzer) cal kit? General Measurement Device and Calibration Topics 4
V How to Calibrate Ring Force Gauges Service Industry Specific Topics 1
bobdoering Who says you can't calibrate a steel rule! Funny Stuff - Jokes and Humour 14
S How can I Calibrate a Biosafety Cabinet? General Measurement Device and Calibration Topics 1
C How to Calibrate a Viscosity Tester General Measurement Device and Calibration Topics 3
0 Is it possible to use a threaded ring gage to calibrate the M8 gage? Calibration and Metrology Software and Hardware 4
C How to Calibrate a Medical Infrared Thermometer General Measurement Device and Calibration Topics 3
T How do I calibrate NPT Thread Plug Gages? General Measurement Device and Calibration Topics 9
E Do you need a Certification to Calibrate Gauges? General Measurement Device and Calibration Topics 2
B Calibrate Hole Presence Detection Device? General Measurement Device and Calibration Topics 5
J What do you use to Calibrate 40" Calipers General Measurement Device and Calibration Topics 10
A Guideline to Calibrate Chamber Temp. & Pressure of a Medical Steam Sterilizer General Measurement Device and Calibration Topics 8
S How to calibrate AOI (Automated Optical Inspection) for IOPQ Qualification and Validation (including 21 CFR Part 11) 3
S Laboratory to Calibrate Objective Micrometer needed General Measurement Device and Calibration Topics 4
C Tolerance Estimation of a Load Cell I want to Calibrate General Measurement Device and Calibration Topics 9
D Procedure on How to Calibrate a External Micrometer General Measurement Device and Calibration Topics 1
B ISO/TS 16949 Section 7.6.3 - Use of Manufacturer to Calibrate IATF 16949 - Automotive Quality Systems Standard 21
N Laboratory that is able to Calibrate Dew Point Meter up to 60?Cdp - Needed General Measurement Device and Calibration Topics 1
C How to calibrate or control patterns for fiberglass General Measurement Device and Calibration Topics 4
N Scale with Internal Calibration - Do I need to calibrate? How to document this? Calibration Frequency (Interval) 8
I Need help finding an Accredited Lab that can Calibrate Brunson 76-RH Survey Transits General Measurement Device and Calibration Topics 5
M Controlling Temperature and Time - Do I need to calibrate the thermostat? IATF 16949 - Automotive Quality Systems Standard 4
D How much Tolerance do I use to Calibrate a 150kgs capacity Scale? General Measurement Device and Calibration Topics 5
M To Calibrate or Not to Calibrate various Weight Scales ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 24
N Thermocouple Inhomogeneity - Need to calibrate a roll of 50m thermocouple type K General Measurement Device and Calibration Topics 3
J Calibrate before use required? Inspection Gages and Measurement Equipment ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 9
R Traceability for Mercury Argon Calibration Source to Calibrate a Spectrometer? General Measurement Device and Calibration Topics 5
P How to Calibrate Laser Micrometer when no Calibration Company in the Country? General Measurement Device and Calibration Topics 3
S 3 Point Calibration or Calibrate to Extreme High and Low? General Measurement Device and Calibration Topics 9
C Seeking a holder/jig to calibrate large OD micrometer calipers (up to 23") General Measurement Device and Calibration Topics 8
S Is it OK to calibrate a measurement device tighter than manufacturer specifications? General Measurement Device and Calibration Topics 18
Similar threads


















































Top Bottom