Fluke 7102 Operating Manual

7102

Micro-Bath

User's Guide

PN 3729328 December 2013

© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. 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

Chapter		Title	Page
1	Before You Start ..................................................................................		1-1
	1.1	Symbols Used .................................................................................	1-1
	1.2	Safety Information ...........................................................................	1-2
	1.2.1 Warnings...............................................................................		1-2
	1.2.2 Cautions ...................................................................................		1-4
	1.3 Authorized Service Centers.............................................................		1-5
2	Introduction .........................................................................................		2-1
3	Specifications and Environmental Conditions.................................		3-1
	3.1 Specifications ..................................................................................		3-1
	3.2 Environmental Conditions................................................................		3-2
4	Quick Start ...........................................................................................		4-1
	4.1 Unpacking........................................................................................		4-1
	4.2	Setup ...............................................................................................	4-2
	4.3	Power ..............................................................................................	4-2
	4.4 Setting the Temperature..................................................................		4-2
5	Installation ...........................................................................................		5-1
	5.1	Bath Environment............................................................................	5-1
	5.2	“Dry-out” Period...............................................................................	5-1
	5.3	Bath Preparation and Filling ............................................................	5-2
	5.4	Power ..............................................................................................	5-2
6	Bath Use...............................................................................................		6-1
	6.1	General............................................................................................	6-1
	6.2	Comparison Calibration...................................................................	6-2
	6.3	Calibration of Multiple Probes..........................................................	6-2

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7	Parts and Controls ..............................................................................		7-1
	7.1	Front Panel......................................................................................	7-1
	7.2	Back Panel ......................................................................................	7-2
	7.3	Accessories .....................................................................................	7-3
	7.3.1 Transport/Pour Access Lid .......................................................		7-3
	7.3.2 Access Cover (Optional)...........................................................		7-4
	7.3.3 Probe Basket ............................................................................		7-4
	7.3.4 Stir Bar......................................................................................		7-4
	7.3.5 Well Extender (Optional) ..........................................................		7-4

8	General Operation ...............................................................................		8-1
	8.1	Changing Display Units ...................................................................	8-1
	8.2	Switching to 230V Operation...........................................................	8-1
	8.3 Bath Fluid ........................................................................................		8-1
	8.3.1 Temperature Range .................................................................		8-2
	8.3.2 Viscosity ...................................................................................		8-2
	8.3.3 Specific Heat ............................................................................		8-2
	8.3.4 Thermal Conductivity................................................................		8-2
	8.3.5 Thermal Expansion...................................................................		8-2
	8.3.6 Electrical Resistivity..................................................................		8-3
		8.3.7 Fluid Lifetime ........................................................................	8-3
	8.3.8 Safety.......................................................................................		8-3
	8.3.9 Cost ..........................................................................................		8-3
	8.3.10 Commonly Used Fluids ..........................................................		8-3
		8.3.10.1 Water (Distilled) ...............................................................	8-4
		8.3.10.2 Mineral Oil .......................................................................	8-4
		8.3.10.3 Silicone Oil (Dow Corning 200.05, 200.10, 200.20) ........	8-4
	8.3.11 Fluid Characteristics Charts ...................................................		8-4
		8.3.11.1 Limitations and Disclaimer...............................................	8-5
		8.3.11.2 About the Graph ..............................................................	8-6
	8.4	Stirring .............................................................................................	8-7
	8.5	Power ..............................................................................................	8-8
	8.6	Thermal Electric Devices (TED) ......................................................	8-8
	8.7	Fluid Drain .......................................................................................	8-9
	8.8	Temperature Controller ...................................................................	8-9

9	Controller Operation ...........................................................................		9-1
	9.1	Well Temperature............................................................................	9-1
	9.2 Temperature Set-point.....................................................................		9-1
	9.2.1 Programmable Set-points.........................................................		9-1
	9.2.2 Set-point Value .........................................................................		9-3
	9.2.3 Temperature Scale Units..........................................................		9-3
	9.3	Scan ................................................................................................	9-4
	9.3.1 Scan Control.............................................................................		9-4
	9.3.2 Scan Rate.................................................................................		9-4
	9.4	Temperature Display Hold...............................................................	9-4
	9.4.1 Hold Temperature Display........................................................		9-5
	9.4.2 Mode Setting ............................................................................		9-5
	9.4.3 Switch Wiring............................................................................		9-5
	9.4.4 Switch Test Example ................................................................		9-6
	9.5	Secondary Menu .............................................................................	9-6
	9.6	Thermal Electric Device (TED)........................................................	9-6
	9.7	Proportional Band............................................................................	9-7
	9.8	Controller Configuration ..................................................................	9-8

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		Contents (continued)
	9.8.1 Operating Parameters ..............................................................	9-8
	9.8.1.1 High Limit...........................................................................	9-9
	9.8.1.2 Stir Speed..........................................................................	9-9
	9.8.2 Serial Interface Parameters......................................................	9-9
	9.8.2.1 Baud Rate..........................................................................	9-10
	9.8.2.2 Sample Period ...................................................................	9-10
	9.8.2.3 Duplex Mode .....................................................................	9-10
	9.8.2.4 Linefeed.............................................................................	9-11
	9.8.3 Calibration Parameters.............................................................	9-11
	9.8.3.1 R0 ......................................................................................	9-12
	9.8.3.2 ALPHA...............................................................................	9-12
	9.8.3.3 DELTA ...............................................................................	9-12
	9.8.3.4 C0 and CG.........................................................................	9-12
	9.8.3.5 rCAL ..................................................................................	9-12
10	Digital Communication Interface .......................................................	10-1
	10.1 Serial Communications..................................................................	10-2
	10.1.1 Wiring .....................................................................................	10-2
	10.1.2 Setup ......................................................................................	10-2
	10.1.2.1 Baud Rate........................................................................	10-2
	10.1.2.2 Sample Period .................................................................	10-3
	10.1.2.3 Duplex Mode ...................................................................	10-3
	10.1.2.4 Linefeed...........................................................................	10-3
	10.1.3 Serial Operation......................................................................	10-3
	10.2 Interface Commands .....................................................................	10-3
11	Test Probe Calibration ........................................................................	11-1
	11.1 Calibrating a Single Probe.............................................................	11-1
	11.2 Stabilization and Accuracy ............................................................	11-2
12	Calibration Procedure.........................................................................	12-1
	12.1 Calibration Points ..........................................................................	12-1
	12.2 Calibration Procedure....................................................................	12-2
	12.2.1 Compute DELTA ....................................................................	12-2
	12.2.2 Compute R0 & ALPHA ...........................................................	12-3
	12.2.3 Accuracy & Repeatability........................................................	12-3
13	Maintenance.........................................................................................	13-1
14	Troubleshooting ..................................................................................	14-1
	14.1 Troubleshooting Problems, Possible Causes, and Solutions ........	14-1
	14.2 Comments .....................................................................................	14-4
	14.2.1 EMC Directive.........................................................................	14-4
	14.2.2 Low Voltage Directive (Safety) ...............................................	14-4

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iv

List of Tables

Table	Title	Page
1.	International Electrical Symbols ................................................................	1-1
2.	Specifications ............................................................................................	3-1
3.	Table of Various Bath Fluids .....................................................................	8-5
4.	Nominal Stirrer Motor SettingsWith Different Liquids ................................	8-8
5.	Controller Communications Commands....................................................	10-4

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vi

List of Figures

Figure			Title	Page
1.	7102	Front Panel.......................................................................................		7-1
2.	7102	Back Panel and Bottom....................................................................		7-2
3.	Bath Lids and Lid Parts .............................................................................			7-3
4.	Probe Basket.............................................................................................			7-4
5.	Stir Bar ......................................................................................................			7-4
6.	Chart of Various Bath Fluids .....................................................................			8-6
7.	Controller Operation Flowchart .................................................................			9-2
8.	Serial Cable Wiring....................................................................................			10-2

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viii

Chapter 1

Before You Start

1.1 Symbols Used

Table 1 lists the International Electrical Symbols. Some or all of these symbols may be used on the instrument or in this manual.

	Table 1. International Electrical Symbols
Symbol		Description
		AC (Alternating Current)
		AC-DC
		Battery
		CE Complies with European Union directives
		DC
		Double Insulated
		Electric Shock
		Fuse
		PE Ground
		Hot Surface (Burn Hazard)
		Read the User’s Guide (Important Information)
O		Off
I		On
		Canadian Standards Association
		OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2
		per IEC1010-1 refers to the level of Impulse Withstand Voltage
CATII		protection provided. Equipment of OVERVOLTAGE CATEGORY II
		is energy-consuming equipment to be supplied from the fixed
		installation. Examples include household, office, and laboratory
		appliances.
		C-TICK Australian EMC mark
		The European Waste Electrical and Electronic Equipment (WEEE)
		Directive (2002/96/
		EC) mark.

1-1

7102

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1.2 Safety Information

Use this instrument only as specified in this manual. Otherwise, the protection provided by the instrument maybe impaired.

The following definitions apply to the terms “Warning” and “Caution”.

•“Warning” identifies conditions and actions that may pose hazards to the user.

•“Caution” identifies conditions and actions that may damage the instrument being used.

1.2.1Warnings

Warnings

To avoid personal injury, follow these guidelines.

•Disclaimer: Hart Scientific manufactures instruments for the purpose of temperature calibration. Instruments used for applications other than calibration are used at the discretion and sole responsibility of the customer. Hart Scientific cannot accept any responsibility for the use of instruments for any application other than temperature calibration.

GENERAL

•DO NOT install an access cover without holes onto a bath that is energized. Dangerous pressures may result from fluids vaporizing.

•DO NOT use the instrument for any application other than calibration work. The instrument was designed for temperature calibration. Any other use of the unit may cause unknown hazards to the user.

•DO NOT use the unit in environments other than those listed in the user’s guide. Completely unattended operation in not recommended.

•DO NOT install access cover without holes onto a bath that is energized. Dangerous pressures may result from fluids vaporizing.

•Follow all safety guidelines listed in the user’s manual.

•Calibration Equipment should only be used by Trained Personnel.

•If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired or safety hazards may arise.

•Inspect the instrument for damage before each use. DO NOT use the instrument if it appears damaged or operates abnormally.

1-2

Before You Start 1

1.2 Safety Information

•Before initial use, or after transport, or after storage in humid or semi-humid environments, or anytime the instrument has not been energized for more than 10 days, the instrument needs to be energized for a “dry-out” period of 2 hours before it can be assumed to meet all of the safety requirements of the IEC 61010-1. If the product is wet or has been in a wet environment, take necessary measures to remove moisture prior to applying power such as storage in a low humidity temperature chamber operating at 50 °C for 4 hours or more.

•The instrument is intended for indoor use only.

•Lift the instrument by the handle provided to move the instrument. DO NOT move the instrument until the display reads less than 25 °C (77 °F) and the unit has been drained or the Transport Lid installed.

BURN HAZARD

•ALWAYS ensure the instrument is COOL before closing the instrument for storage.

•DO NOT touch the well access surface of the unit.

•DO NOT mix water and oil when exceeding temperatures of 90 °C (194 °F).

•DO NOT mix water and oil when exceeding temperatures of 90 °C (194 °F). The temperature of the well access is the same as the actual temperature shown on the display, e.g. if the unit is set at 125 °C and the display reads 125 °C, the well is at 125 °C.

•Ensure the power cord is positioned in such a way as it cannot contact hot surfaces or temperature probes. Always inspect power cord before use for any damage to the insulation due to contact with hot surfaces, cuts or abrasions.

•The top sheet metal of the instrument may exhibit extreme temperatures for areas close to the well access.

•DO NOT turn off the unit at temperatures higher than 100 °C.

This could create a hazardous situation. Select a set-point less than 100 °C and allow the unit to cool before turning it off.

•DO NOT remove the fluid at high temperatures. The fluid will be the same temperature as the display temperature.

•DO NOT operate near flammable materials. Extreme temperatures could ignite the flammable material.

•Use of this instrument at HIGH TEMPERATURES for extended periods of time requires caution.

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7102

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ELECTRICAL HAZARD

•These guidelines must be followed to ensure that the safety mechanisms in this instrument will operate properly. This instrument must be plugged into an AC only electric outlet as listed in Section 3.1, Specifications. The power cord of the instrument is equipped with a three-pronged grounding plug for your protection against electrical shock hazards. It must be plugged directly into a properly grounded threeprong receptacle. The receptacle must be installed in accordance with local codes and ordinances or adapter plug. DO NOT use an extension cord. Consult a qualified electrician. Always inspect the power cord before use for any damage to the insulation due to contact with hot surfaces, cuts or abrasions.

•The instrument is equipped with operator accessible fuses. If a fuse blows, it may be due to a power surge or failure of a component. Replace the fuse once. If the fuse blows a second time, it is likely caused by failure of a component part. If this occurs, contact a Hart Scientific Authorized Service Center. Always replace the fuse with one of the same rating, voltage, and type. Never replace the fuse with one of a higher current rating.

•Always replace the power cord with an approved cord of the correct rating and type. If you have questions, contact an Authorized Service Center (see Section 1.3).

•High voltage is used in the operation of this equipment. Severe injury or death may result if personnel fail to observe the safety precautions.

1.2.2Cautions

Cautions

To avoid possible damage to the instrument, follow these guidelines.

•Always operate this instrument at room temperatures listed in Section 3.2, Environmental Conditions. Allow sufficient air circulation by leaving at least 6 inches (15 cm) of clearance around the instrument.

•Overhead clearance is required. DO NOT place this instrument under a cabinet or other structure.

•Never introduce any foreign material into the well.

•DO NOT change the values of the calibration constants from the factory set values. The correct setting of these parameters is important to the safety and proper operation of the unit.

•DO NOT slam the probe stems into the well. This type of action can cause a shock to the sensor and affect the calibration.

•DO use a ground fault interrupt device.

1-4

Before You Start 1

1.3 Authorized Service Centers

•DO NOT operate this instrument in an excessively wet, oily, dusty, or dirty environment.

•The unit is a precision instrument. Although it has been designed for optimum durability and trouble free operation, it must be handled with care.

•Most probes have handle temperature limits. Be sure that the probe handle temperature limit is not exceeded in the air above the instrument.

•The instrument and any thermometer probes used with it are sensitive instruments that can be easily damaged. Always handle these devices with care. Do not allow them to be dropped, struck, stressed, or overheated.

•When calibrating PRTs always follow correct calibration procedure and calibrate from high temperatures to low temperatures with the appropriate triple point of water checks.

•Components and heater lifetimes can be shortened by continuous high temperature operation.

•If a mains supply power fluctuation occurs, immediately turn off the bath. Power bumps from brown-outs and blackouts can damage the instrument. Wait until the power has stabilized before re-energizing the bath.

•Fluids may expand at different rates. Allow for fluid expansion inside the well as the instrument heats. Otherwise, the fluid may overflow the well and leak into the instrument.

1.3Authorized Service Centers

Please contact one of the following authorized Service Centers to coordinate service on your Hart product:

Fluke Corporation

Hart Scientific Division

799 E. Utah Valley Drive American Fork, UT 84003-9775 USA

Phone: + 1.801.763.1600

Telefax: +1.801.763.1010

E-mail: [e-mail]

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Fluke Nederland B.V.

Customer Support Services Science Park Eindhoven 5108 5692 EC Son NETHERLANDS

Phone: [phone]

Telefax: [phone] E-mail: [e-mail]

Fluke Int’l Corporation

Service Center - Instrimpex Room 2301 Sciteck Tower 22 Jianguomenwai Dajie Chao Yang District

Beijing 100004, PRC CHINA

Phone: [phone] Telefax: [phone] E-mail: [e-mail]

Fluke South East Asia Pte Ltd.

Fluke ASEAN Regional Office Service Center

60 Alexandra Terrace #03-16 The Comtech (Lobby D) 118502

SINGAPORE

Phone: [phone]

Telefax: [phone] E-mail: [e-mail]

When contacting these Service Centers for support, please have the following information available:

•Model Number

•Serial Number

•Voltage

•Complete description of the problem

1-6

Chapter 2

Introduction

The Hart Scientific 7102 Micro-Bath may be used as a portable instrument or bench top temperature calibrator for calibrating thermocouple and RTD temperature probes. The 7102 is small enough to use in the field, and accurate enough to use in the lab. With an ambient temperature of 23 °C (74 °F), calibrations may be done over a range of −5 °C to 126 °C (23 °F to 259 °F). The resolution of the 7102 temperature display is 0.01 degrees.

The Micro-Bath calibrator features:

•Convenient handle

•RS-232 interface

•Switchable AC Input (115 VAC or 230 VAC)

•Optional well extender to extend well depth Built in programmable features include:

•Temperature scan rate control

•Temperature switch hold

•Eight Set-point memory

•Adjustable readout in °C or °F

The temperature is accurately controlled by Hart’s hybrid analog/digital controller. The controller uses a precision platinum RTD as a sensor and controls the well temperature with a solid state relay (triac) driven heater.

The LED front panel continuously shows the current well temperature. The temperature may be easily set with the control buttons to any desired temperature within the specified range. The calibrator’s multiple fault protection devices insure user and instrument safety and protection.

The 7102 Micro-Bath was designed for portability, low cost, and ease of operation. Through proper use, the instrument will continuously provide accurate calibration of temperature sensors and devices. The user should be familiar with the safety guidelines and operating procedures of the calibrator as described in the instruction manual.

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2-2

Chapter 3

Specifications and Environmental

Conditions

3.1 Specifications

	Table 2. Specifications
Range		−5 to 125 °C (23 to 257 °F)
Accuracy		±0.25 °C
Stability		±0.015 °C at −5 °C (oil, 5010)
		±0.03 °C at 121 °C (oil, 5010)
Uniformity		±0.02 °C
Resolution		0.01 °C/F
Operating Temperature		5 to 45 °C (41 to 113 °F)
Heating Time		25 °C to 100 °C (77 °F to 212 °F): 30 minutes
Cooling Time		25 °C to 0 °C (77 °F to 32 °F): 30 minutes
Well Size		2.5" dia. x 5.5" deep (64 x 139 mm)
		(access opening is 1.9" [48 mm] in diameter )
Exterior Dimension		12" H x 7.2" W x 9.5" D (31 cm x 18 cm x 24 cm)
Weight		15 lb. (6.8 kg) with fluid
Power		115 VAC ( ±10 %), 1.8 A, or 230 VAC ( ±10 %), 0.9
		A, switchable, 50/60 Hz, 200 W
Readout		Switchable °C or °F
Controller		Digital controller with data retention
Thermal Electric Devices (TED)		150 W
Cooling		Fan and Thermal Electric Devices (TED)
Fault Protection		Sensor burnout and short protection
Safety		Overvoltage (Installation) Category II, Pollution
		Degree 2 per IEC 61010-01
Fuse Rating		115 V: 250 V 3A SB (slow blow)
		230 V: 250 V 1.6 A T (time delay)

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7102

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3.2Environmental Conditions

Although the instrument has been designed for optimum durability and troublefree operation, it must be handled with care. The instrument should not be operated in an excessively dusty or dirty environment. Maintenance and cleaning recommendations can be found in the Maintenance Section of this manual.

•The instrument operates safely under the following conditions:

•ambient temperature range: 5 − 45 °C (41 − 113 °F)

•ambient relative humidity: maximum 80 % for temperature <31 °C, decreasing linearly to 50 % at 40 °C

•mains voltage within ± 10 % of nominal

•vibrations in the calibration environment should be minimized

•altitudes less than 2,000 meters

3-2

Chapter 4

Quick Start

Caution:

READ SECTION 6 ENTITLED BATH USE before placing the bath in service. Incorrect handling can damage the bath and void the warranty.

4.1Unpacking

Unpack the Micro-Bath carefully and inspect it for any damage that may have occurred during shipment. If there is shipping damage, notify the carrier immediately.

Verify that the following components are present:

•7102 Micro-Bath

•Transport/Pour Access Lid

•Probe Basket

•Stir Bar

•Power Cord

•User’s Guide

•Report of Calibration

•Calibration Label

•Access Cover, optional

•Well Extender, optional

4-1