Temperature POD 050504

7/21/2019 Temperature POD 050504

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When Do You Need toVerify Temperature?

Performing a test or running a process at the

incorrect temperature is a frequent source of bad

results or poor quality. Many material properties

are temperature dependent, so ensuring that your

temperature measurement is accurate is often

critical for achieving good results. Variability of

temperature either in accuracy or uniformity is

a significant, and often unrecognized, contributor

to reduced product quality and inconsistent

test data. Verification of temperature

measuring systems is often not performed

frequently enough or with appropriate procedures

and methodologies.

To address these challenges, Instron has

developed a number of temperature verification

procedures that meet the most commonrequirements of laboratories and related

manufacturing processes. These procedures are

compliant with ISO/IEC 17025 methodology,

providing assurance that your test data is valid

and processes are properly controlled.

Types of Equipment Verified

h Environmental chambers and furnaces

manufactured by Instron SFL and most

other brands

h Temperature data loggers, circular or strip

chart recordersh Temperature indicators of all types

h Heat treating and finishing equipment

h All types of testing equipment that utilize

temperature control

h Temperature controls for various

manufacturing processes

We can also determine temperature profiles used

to characterize gradients, including oven and

chamber uniformity surveys.

TEMPERATURECALIBRATIONInstron ensures you are operating at the

proper temperature.

S T R A I N

STR

ESS

Effects of Temperature on Results

PLASTIC SAMPLE

0

84 MPa 12 KSI

30%

0 C

25 C

50 C

65 C

Material properties can be affected by small

changes in temperature. Errors in temperature

mean errors in results.

TM


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Temperature CertificateSingle point environmental chamber calibration.

Method of verification and conformance torelevant quality standards

(eg. ISO/IEC 17025 or ANSI Z540-1) clearly

stated so your auditors, customers and you

have the information you need.

As found/ as left information is provided.

Instron service engineers can make

adjustments and repairs if necessary.

The certificate number is printed

on every page for quick reference.

Complete description

of the equipment

eliminates all doubts

about what has

been verified.

Uncertainty of

measurement

calculated anddocumented for

all tests.

Instron maintains a secure electronic

back-up of all data at the factory.

Instron certificates are designed to help

you meet your quality program requirements.

All of them include a unique certificate

number and date of issue.


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Temperature CertificateMulti-point temperature uniformity survey.

10 thermocouples

measure temperature at

critical locations

throughout the chamber.

Multiple readings over

time fully characterize

temperature response.

Operating range

of each location

are summarized.

All standards used are traceable to

National Standards (e.g. NIST, NPL).


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WB1194

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Canton, MA 02021-1089 USA

Tel: +1 800 473 7838

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Fax: +1 781 575 5751

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High Wycombe, Bucks

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Tel: +44 1494 456815

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Industrial Products Group

900 Liberty Street

Grove City, PA 16127-9005 USA

Tel: +1 800 726 8378

+ 724 458 9610

Fax: +1 724 458 9614

Service DescriptionInstron performs two types of temperature

verifications in the field. Type 1 is referred to as

In-situ and is performed by comparing a

calibrated thermocouple's reading to either the set

temperature or the readout of the system being

verified. The calibrated thermocouple is placed as

close as possible to the transducer being verified,or in an alternate location specified by the

customer. For a chamber uniformity survey,

multiple calibrated thermocouples are used to

measure the temperature at multiple locations

within a chamber. Type 2 is Sensor substitution

and is done by injecting calibrated signals into the

instrument being verified. This simulates

a correctly performing thermocouple (mV)

or RTD (ohms).

Type 1 is preferred because the entire system is

verified. Type 2 verifies the electronics only and is

used when Type 1 is not possible or practical.

Often an in-situ (Type 1) verification will be done

at one temperature (e.g. the current temperature

of a process), then a sensor substitution

verification (Type 2) will be performed on theelectronics to ensure they are operating properly

throughout their range. Many calibration vendors

only perform Type 2 verifications.

The basic in-situ calibration is for one data point,

and the basic sensor substitution calibration is for

five data points. Additional points are optional.

Standard in-situ pricing assumes that temperature

change rate is 10 C per minute or faster.

Calibrator

Range -200 C to +1800 C

Thermocouple Types J,K,T,E,R,S,B per NIST 175 and ITS-90 L,U per DIN 43710 and IPTS-68

Resolution 0.1 C or F (Types J,K,T,E,L,U) 1 C or F (Types B,R,S)

Accuracy +0.3 C + 10 microvolts

Display 5 digits

Type K Thermocouple Wire

Range 0 C to +900 C

Accuracy 0.5 C or 0.2 %

Type T Thermocouple Wire

Range - 200 C to 0 C

Accuracy 0.5 C or 0.4 %

Simulation Error (Sensor Substitution)

Type J,K,T,E +0.5 C

Type R,S +1.4 CType B +1.8 C

Temperature Calibration Specifications

Instron is a registered trademark of Instron Corporation. Other names, logos, icons and marks identifying Instron products and

services referenced herein are trademarks of Instron Corporation and may not be used without the prior written permission of Instron.

Other product and company names listed are trademarks or trade names of their respective companies.

Copyright 2004 Instron Corporation. All rights reserved.

All of the specifications shown in this brochure are subject to change without notice.

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Temperature POD 050504