Fluke 525A Service Manual

®

525A

Temperature/Pressure Calibrator

Service Manual

PN 1644492

March 2002

© 2002 Fluke Corporation. All rights reserved. Printed in USA All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke’s opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country.

Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation	Fluke Europe B.V.
P.O. Box 9090	P.O. Box 1186
Everett, WA 98206-9090	5602 BD Eindhoven
U.S.A.	The Netherlands

11/99

To register your product online, visit register.fluke.com

Table of Contents

Title	Page
Introduction .......................................................................................................	1
Contacting Fluke ...............................................................................................	1
Safety Information.............................................................................................	1
Calibrator Specifications ...................................................................................	3
General Specifications ..................................................................................	3
DC Voltage Specifications, Output ...............................................................	4
DC Current Specifications, Output ...............................................................	4
Resistance Specifications, Output .................................................................	5
Resistance Specifications, Input....................................................................	5
Thermocouple Specification, Output and Input ............................................	6
TC mV Specifications, Input and Output......................................................	7
RTD and Thermistor Specification, Output ..................................................	8
RTD and Thermistor Specification, Input.....................................................	9
Pressure Measurement ..................................................................................	11
Theory of Operation ..........................................................................................	11
Micro-Controller Section ..............................................................................	11
Analog Section ..............................................................................................	12
Basic Maintenance.............................................................................................	12
Cleaning the Calibrator .................................................................................	12
Replacing a Line Fuse ...................................................................................	12
To Check or Replace a Fuse..........................................................................	13
Changing Line Voltage .................................................................................	13
Modular-Level Maintenance .............................................................................	14
Disassembly ..................................................................................................	15
Reassembly ...................................................................................................	15
Output Block Subassembly Connections..................................................	17
Keypad to Main PCB................................................................................	19
Display Assembly to Main PCB ...............................................................	19
Opto RS232 to Main PCA ........................................................................	20
Reinstalling the Circuit Boards.................................................................	21
Connecting the Power Module .................................................................	21
Final Assembly and Inspection .....................................................................	22
Performance Tests .............................................................................................	23
Required Equipment List ..............................................................................	23
Testing DC Voltage.......................................................................................	24

i

525A

Service Manual

Testing DC Current .......................................................................................	25
Testing Thermocouple Output ......................................................................	26
Testing CJC (Cold Junction Compensation).............................................	27
CJC (Cold Junction Compensation) Calibration.......................................	27
Testing Thermocouple Input .........................................................................	28
Testing Ohms Output ....................................................................................	29
Testing Ohms Input.......................................................................................	30
Testing Pressure Modules .............................................................................	32
Calibration Adjustment .....................................................................................	32
Initiating Communication .............................................................................	32
Starting Adjustment Mode ............................................................................	32
Adjustment Sequence....................................................................................	33
14: Calibrate DAC, Digital to Analog Converter Adjustment..................	34
1: 100 mV Source to 4: 100 V Source, Adjusting DC Source..................	34
5: 100 mA Source, Adjusting DC Current Source....................................	35
6: Hi Ohms Source, Adjusting High Resistance Source ...........................	37
7: Low Ohms, Adjusting Low Ohms Source............................................	38
8: Hi Ohms, Adjusting High Resistance Measure ....................................	38
9: Low Ohms, Adjusting Low Resistance Measure..................................	40
10: SPRT 25, Adjusting SPRT Low Resistance Measure ........................	41
11: TC SOURCE, Adjusting TC mVolt Source .......................................	43
12: TC Read, Adjusting TC mVolt Measure ............................................	43
Customer Replaceable Parts ..............................................................................	45

ii

List of Tables

Table	Title	Page
1.	Symbols Used on the Calibrator ............................................................................	2
2.	Replacement Fuses ................................................................................................	13
3.	Front Panel Wire Color Assignments ....................................................................	16
4.	Rear Panel Wire Color Assignments .....................................................................	16
5.	Output Block to Main PCA Connections...............................................................	17
6.	TC PCA to Main PCA Connections ......................................................................	18
7.	Opto RS232 to Main PCA Connections ................................................................	20
8.	Power Module to Main PCA Connections.............................................................	21
9.	Power Connections ................................................................................................	22
10.	Required Equipment ..............................................................................................	23
11.	Testing DC Voltage ...............................................................................................	24
13.	TC Temperatures ...................................................................................................	26
14.	Ohms Output Ranges .............................................................................................	29
15.	Ohms Ratio Table ..................................................................................................	31
16.	Calibration Dependencies ......................................................................................	33
17.	List of Equipment for Voltage Calibration Adjustments .......................................	34
18.	List of Equipment for Current Calibration Adjustments .......................................	35
19.	List of Equipment for High Ohms Measure Calibration Adjustments ..................	38
20.	List of Equipment for High Ohms Measure Calibration Adjustments ..................	40
21.	List of Equipment for Low Ohms Measure Calibration Adjustments ...................	41
22.	List of Test Equipment for Adjusting TC Source ..................................................	43
23.	List of Test Equipment for Adjusting TC Read.....................................................	43
24.	List of Test Equipment for Adjusting TC CJC ......................................................	45
25.	Replacement Parts..................................................................................................	47
26.	Accessories ............................................................................................................	48

iii

525A

Service Manual

iv

List of Figures

Figure	Title	Page
1.	Accessing the Fuse.................................................................................................	14
2.	Wiring Connections ...............................................................................................	17
3.	Solder Connections for the TC PCA......................................................................	18
4.	Keypad PCA Connections .....................................................................................	19
5.	Connections for the Opto RS232 PCA ..................................................................	20
6.	Power Module Connections...................................................................................	22
7.	Measuring DC Current...........................................................................................	25
8.	Testing TC Output .................................................................................................	26
9.	Connections for CJC Calibration ...........................................................................	27
10.	Connections for Measuring TC Input ....................................................................	28
11.	Connection for Measuring Resistance Output .......................................................	29
12.	1281 Connection Diagram .....................................................................................	30
13.	Connection for Measuring Ohms...........................................................................	31
14.	Exploded View of the 525A ..................................................................................	46

v

525A

Service Manual

vi

525A

Introduction

This manual provides user-service information for the 525A Temperature/Pressure Calibrator (hereafter referred to as "the Calibrator"). Details regarding verification of the Calibrator’s functionality and calibration, basic maintenance, contacting Fluke service centers, and important safety information are also contained within this manual.

Contacting Fluke

To contact Fluke, order accessories, or locate the nearest Fluke Service Center or distributor, call:

∙USA: 1-888-99-FLUKE (1-888-993-5853)

∙Canada: 1-800-36-FLUKE (1-800-363-5853)

∙Europe: [phone]

∙Japan: [phone]

∙Singapore: [phone]

∙Anywhere in the world: [phone]

Or, visit Fluke’s Web site at www.fluke.com.

Safety Information

The Calibrator complies with EN 61010, ANSI/ISA-S82.01-1994, and CAN/CSA-C22.2 No. 1010.1-92. Use the Calibrator only as specified in this manual, otherwise the protection provided by the Calibrator may be impaired.

CAT II equipment is designed to protect against transients from energy-consuming equipment supplied from a fixed installation, such as televisions, personal computers, portable tools, and other household appliances.

A “ WWarning” statement identifies hazardous conditions and actions that could cause bodily harm or death.

A “ WCaution” statement identifies conditions and actions that could damage the Calibrator or the equipment under test.

International symbols used on the Calibrator and in this manual are explained in Table 1.

1

525A

Service Manual

WWarning

To avoid possible electric shock or personal injury, follow these guidelines:

∙Use the Calibrator only as specified in this manual or the protection provided by the Calibrator might be impaired.

∙Inspect the Calibrator before use. Do not use the Calibrator if it appears damaged. Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors.

∙Have the Calibrator serviced only by qualified service personnel.

∙Do not apply more than the rated voltage between the terminals, as marked on the Calibrator, or between any terminal and earth ground.

∙Always use the power cord and connector appropriate for the voltage and outlet of the country or location in which you are working.

∙Never operate the Calibrator with the cover removed or the case open.

∙Never remove the cover or open the case of the Calibrator without first removing the power source.

∙Use caution when working with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc. These voltages pose a shock hazard.

∙Use only the replacement fuse(s) specified in this manual.

∙Use the proper terminals, function, and range for your measurements.

∙Do not operate the Calibrator around explosive gas, vapor, or dust.

∙When servicing the Calibrator, use only specified replacement parts.

Table 1. Symbols Used on the Calibrator

AC (Alternating Current)		Earth ground
DC (Direct Current)	Ω	Resistance
Pressure		Conforms to European Union directives
Chassis protective ground		Canadian Standards Association,
		NRTL
Important Information. Refer to the		International ON/OFF symbol.
manual.
Caution, risk of electric shock

2

525A

Calibrator Specifications

Calibrator Specifications

General Specifications

Warm up time

Settling time

Standard interface

Optional interface

Temperature performance

Twice the time since last warmed up, to a maximum of 30 minutes

Less than 5 seconds for all functions and ranges except as noted

RS-232

IEEE-488 (GPIB)

Operating	0 °C to 50 °C
Calibration (tcal)	18 °C to 28 °C
Storage	-20 °C to 70 °C

Electromagnetic compatibility

Temperature coefficient

Relative humidity

CE: Conforms to EN61326

Temperature coefficient for temperatures outside tcal ±5 °C is 10 % of the 90 day specification (or 1 year if applicable) per °C

Operating	< 80 % to 30 °C, < 70 % to 40 °C, < 40 % to 50 °C
Storage	< 95 % noncondensing

Altitude

Safety

Analog low isolation

Line power

Power consumption

Dimensions

Weight (without options)

Operating	3,050 m (10,000 ft) maximum
Nonoperating	12,200 m (40,000 ft) maximum

EN 61010 Second, ANSI/ISA-S82.01-1994,

CAN/CSA-C22.2 No. 1010.1-92, NRTL

20 V

Line Voltage (selectable)		100 V/120 V or 220 V/240 V
Line Frequency		47 to 63 Hz
Line Voltage Variation		±10 % about line voltage setting
15 VA maximum
Height	13.3 cm (5.25 in) plus 1.5 cm (0.6 in) four feet on bottom
Width	¾ standard rack width
Depth	47.3 cm (18.6 in) overall

4 kg (9 lb)

3

525A

Service Manual

DC Voltage Specifications, Output

Absolute Uncertainty,

tcal ±5 °C

± (ppm of output +μV)

Stability

Maximum

±

°

C

Ranges1

24 hours,

1

Resolution

Burden2

90 days

1 year

±

μ

(ppm of output + V)

0 to 100.000 mV

25

3

30

3

5

+2

1 μV

10 mA

0 to 1.00000 V

25

20

30

20

4

+20

10 μV

10 mA

0 to 10.0000 V

25

200

30

200

4

+200

100 μV

10 mA

0 to 100.000 V

25

2 mV

30

2 mV

5

+1 mV

1 mV

1 mA

1.All outputs are positive only.

2.Remote sensing is not provided. Output resistance is < 1Ω.

			Noise
Ranges		Bandwidth 0.1 to 10 Hz		Bandwidth10 Hz to 10 kHz
		μ		μ
		(ppm of output + V p-p)		( V rms)
0 to 100.000 mV		1 μV		6 μV
0 to 1.00000	V	10 μV		60 μV
0 to 10.0000	V	100 μV		600 μV
0 to 100.000 V		10 ppm+1 mV		20 mV

DC Current Specifications, Output

		Absolute Uncertainty,
	tcal ±5 °C ± (ppm of output +μA)
Ranges1
	90 days			1 year
0 to 100.000 mA	85		2	100	2
1. All outputs are positive only.

	Maximum		Maximum
	Compliance		Inductive
Resolution	Voltage		Load
1 μA	10 V		100 μH

		Noise
Ranges	Bandwidth		Bandwidth
	0.1 to 10 Hz p-p		10 Hz to 10 kHz rms
0 to 100.000 mA	2000 nA		20 μA

4

525A

Calibrator Specifications

Resistance Specifications, Output

Absolute Uncertainty, tcal ±5 °C,

±(ppm of output ± Ω)

Ranges1	90 days	1 year	Resolution	Allowable Current2
5 to 400.00 Ω	0.025	0.03	0.01 Ω	1 to	10 mA
5 to 4.0000 kΩ	0.25	0.3	0.1 Ω	250	μA to 1 mA

1.Continuously variable from 0 to 4 kΩ.

2.For currents lower than shown, the floor adder increases by Floor(new) = Floor(old) x Imin/Iactual.

For example, a 500 μA stimulus measuring 100 Ω has a floor uncertainty of 0.025 Ω x 1 mA/500 μA = 0.05 Ω.

Resistance Specifications, Input

Absolute Uncertainty,

tcal ±5 °C, ±(ppm of output ± Ω)

	Ranges		90 days			1 year			Resolution		Stimulus Current
	0 to 400.00 Ω	35		0.003	40		0.003		0.001 Ω		1 mA
	401 to 4001.00 Ω	35		0.03	40		0.03		0.01 Ω		0.1 mA

5

525A

Service Manual

Thermocouple Specification, Output and Input

TC Type

B

C

E

J

K

L

N

Range (°C)

Minimum	Maximum
600 °C	800 °C
800 °C	1000 °C
1000 °C	1550 °C
1550 °C	1820 °C
0 °C	150 °C
150 °C	650 °C
650 °C	1000 °C
1000 °C	1800 °C
1800 °C	2316 °C
-250 °C	-100 °C
-100 °C	-25 °C
-25 °C	350 °C
350 °C	650 °C
650 °C	1000 °C
-210 °C	-100 °C
-100 °C	-30 °C
-30 °C	150 °C
150 °C	760 °C
760 °C	1200 °C
-200 °C	-100 °C
-100 °C	-25 °C
-25 °C	120 °C
120 °C	1000 °C
1000 °C	1372 °C
-200 °C	-100 °C
-100 °C	800 °C
800 °C	900 °C
-200 °C	-100 °C
-100 °C	-25 °C
-25 °C	120 °C
120 °C	410 °C
410 °C	1300 °C

Absolute Uncertainty,

tcal ±5 °C, ±(°C)1

Output/Input

90 days	1 year
0.42 °C	0.46 °C
0.39 °C	0.39 °C
0.40 °C	0.40 °C
0.44 °C	0.45 °C
0.25 °C	0.30 °C
0.21 °C	0.26 °C
0.23 °C	0.31 °C
0.38 °C	0.50 °C
0.63 °C	0.84 °C
0.38 °C	0.50 °C
0.16 °C	0.18 °C
0.14 °C	0.15 °C
0.14 °C	0.16 °C
0.16 °C	0.21 °C
0.20 °C	0.27 °C
0.18 °C	0.20 °C
0.14 °C	0.16 °C
0.14 °C	0.17 °C
0.18 °C	0.23 °C
0.25 °C	0.33 °C
0.19 °C	0.22 °C
0.14 °C	0.16 °C
0.19 °C	0.26 °C
0.30 °C	0.40 °C
0.37 °C	0.37 °C
0.26 °C	0.26 °C
0.17 °C	0.17 °C
0.33 °C	0.40 °C
0.20 °C	0.24 °C
0.16 °C	0.19 °C
0.14 °C	0.18 °C
0.21 °C	0.27 °C

1. Does not include thermocouple wire error.

6

525A

Calibrator Specifications

Thermocouple Specification, Output and Input (continued)

TC Type

R

S

T

U

mV

Range (°C)

Minimum	Maximum
0 °C	250 °C
250 °C	400 °C
400 °C	1000 °C
1000 °C	1750 °C
0 °C	250 °C
250 °C	1000 °C
1000 °C	1400 °C
1400 °C	1750 °C
-250 °C	-150 °C
-150 °C	0 °C
0 °C	120 °C
120 °C	400 °C
-200 °C	0 °C
0 °C	600 °C

-10 to 75.000 mV

Absolute Uncertainty,

tcal ±5 °C, ±(°C)1

Output/Input

90 days	1 year
0.58 °C	0.58 °C
0.34 °C	0.35 °C
0.31 °C	0.33 °C
0.30 °C	0.40 °C
0.56 °C	0.56 °C
0.36 °C	0.36 °C
0.30 °C	0.37 °C
0.35 °C	0.46 °C
0.51 °C	0.63 °C
0.18 °C	0.24 °C
0.13 °C	0.16 °C
0.12 °C	0.14 °C
0.56 °C	0.56 °C
0.27 °C	0.27 °C

1. Does not include thermocouple wire error.

TC mV Specifications, Input and Output

Range

(mV)

-10 to 75.000

Absolute Uncertainty, tcal +/-5 °C

+/-( ppm of output + μV)

90 Days	1 Year
25 + 3μV	30 + 3μV

Stability
24 Hours +/-1°C		Maximum
+/- ( ppm of output + μV)	Resolution	Burden
5 + 2μV	1μV	10 Ohms

7

525A

Service Manual

RTD and Thermistor Specification, Output

			Absolute Uncertainty
	Range (°C)		tcal ±5 °C, ±(°C)1
RTD Type	Minimum	Maximum	90 days	1 year
Pt 385, 100 Ω	-200 °C	-80 °C	0.06 °C	0.07 °C
	-80 °C	0 °C	0.08 °C	0.10 °C
	0 °C	100 °C	0.08 °C	0.10 °C
	100 °C	300 °C	0.07 °C	0.09 °C
	300 °C	400 °C	0.07 °C	0.09 °C
	400 °C	630 °C	0.08 °C	0.09 °C
	630 °C	800 °C	0.08 °C	0.10 °C
Pt 3926, 100 Ω	-200 °C	-80 °C	0.06 °C	0.07 °C
	-80 °C	0 °C	0.06 °C	0.07 °C
	0 °C	100 °C	0.06 °C	0.08 °C
	100 °C	300 °C	0.07 °C	0.08 °C
	300 °C	400 °C	0.07 °C	0.09 °C
	400 °C	630 °C	0.08 °C	0.09 °C
Pt 3916, 100 Ω	-200 °C	-190 °C	0.06 °C	0.07 °C
	-190 °C	-80 °C	0.06 °C	0.08 °C
	-80 °C	0 °C	0.06 °C	0.08 °C
	0 °C	100 °C	0.06 °C	0.08 °C
	100 °C	260 °C	0.07 °C	0.08 °C
	260 °C	300 °C	0.07 °C	0.08 °C
	300 °C	400 °C	0.07 °C	0.09 °C
	400 °C	600 °C	0.08 °C	0.09 °C
	600 °C	630 °C	0.08 °C	0.09 °C
Pt 385, 200 Ω	-200 °C	-80 °C	0.31 °C	0.38 °C
	-80 °C	0 °C	0.32 °C	0.38 °C
	0 °C	100 °C	0.33 °C	0.39 °C
	100 °C	260 °C	0.33 °C	0.39 °C
	260 °C	300 °C	0.36 °C	0.43 °C
	300 °C	400 °C	0.36 °C	0.43 °C
	400 °C	600 °C	0.42 °C	0.50 °C
	600 °C	630 °C	0.42 °C	0.50 °C
Pt 385, 500 Ω	-200 °C	-80 °C	0.13 °C	0.15 °C
	-80 °C	0 °C	0.13 °C	0.15 °C
	0 °C	100 °C	0.13 °C	0.16 °C
	100 °C	260 °C	0.14 °C	0.17 °C
	260 °C	300 °C	0.14 °C	0.17 °C
	300 °C	400 °C	0.15 °C	0.18 °C
	400 °C	600 °C	0.16 °C	0.19 °C
	600 °C	630 °C	0.16 °C	0.19 °C

1. 2-wire output

8

525A

Calibrator Specifications

RTD and Thermistor Specification, Output (continued)

RTD Type

Pt 385, 1000 Ω

PtNi 385, 120 Ω (Ni 120)

Cu 427, 10 Ω2

YSI 400

1. 2-wire output

						Absolute Uncertainty
		Range (°C)				tcal ±5 °C, ±(°C)1
Minimum			Maximum		90 days		1 year
-200 °C			-80 °C		0.06 °C		0.07 °C
-80	°C		0 °C		0.06	°C	0.08	°C
0 °C			100	°C	0.07	°C	0.08	°C
100	°C		260	°C	0.07	°C	0.08	°C
260	°C		300	°C	0.07	°C	0.09	°C
300	°C		400	°C	0.07	°C	0.09	°C
400	°C		600	°C	0.08	°C	0.09	°C
600	°C		630	°C	0.08	°C	0.09	°C
-80 °C			0 °C		0.04 °C		0.05 °C
0 °C			100	°C	0.04	°C	0.04	°C
100	°C		260	°C	0.03	°C	0.03	°C
-100 °C			260 °C		0.63 °C		0.75 °C
15 °C			50 °C		0.005 °C		0.007 °C

2. Based on MINCO Application Aid No. 18.

RTD and Thermistor Specification, Input

RTD Type

Pt 385, 100 Ω

Pt 3926, 100 Ω

Pt 3916, 100 Ω

Pt 385, 200 Ω

			Absolute Uncertainty,
	Range (°C)		tcal ±5 °C, ±(°C)1
Minimum		Maximum	90 days	1 year
-200 °C		-80 °C	0.031 °C	0.012 °C
-80 °C		0 °C	0.018 °C	0.020 °C
0 °C		100 °C	0.018 °C	0.020 °C
100 °C		300 °C	0.027 °C	0.030 °C
300 °C		400 °C	0.031 °C	0.035 °C
400 °C		630 °C	0.042 °C	0.047 °C
630 °C		800 °C	0.050 °C	0.057 °C
-200 °C		-80 °C	0.031 °C	0.031 °C
-80 °C		0 °C	0.014 °C	0.015 °C
0 °C		100 °C	0.018 °C	0.019 °C
100 °C		300 °C	0.026 °C	0.029 °C
300 °C		400 °C	0.031 °C	0.034 °C
400 °C		630 °C	0.041 °C	0.046 °C
-200 °C		-190 °C	0.026 °C	0.028 °C
-190 °C		-80 °C	0.011 °C	0.012 °C
-80 °C		0 °C	0.014 °C	0.015 °C
0 °C		100 °C	0.018 °C	0.019 °C
100 °C		260 °C	0.025 °C	0.028 °C
260 °C		300 °C	0.026 °C	0.029 °C
300 °C		400 °C	0.031 °C	0.034 °C
400 °C		600 °C	0.040 °C	0.045 °C
600 °C		630 °C	0.042 °C	0.047 °C
-200 °C		-80 °C	0.071 °C	0.072 °C
-80 °C		0 °C	0.075 °C	0.076 °C
0 °C		100 °C	0.079 °C	0.081 °C
100 °C		260 °C	0.082 °C	0.085 °C
260 °C		300 °C	0.090 °C	0.093 °C
300 °C		400 °C	0.093 °C	0.097 °C
400 °C		600 °C	0.100 °C	0.105 °C
600 °C		630 °C	0.101 °C	0.106 °C

1. 4-wire mode. Uncertainties listed do not include probe uncertainties.

9