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PN 3720771
April 2013
© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
6020 Series
Calibration Baths
User's Guide
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Table of Contents
Related Manuals for Fluke Calibration 6020 Series
Summary of Contents for Fluke Calibration 6020 Series
- Page 1 Via Acquanera, 29 22100 Como tel. 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it 6020 Series Calibration Baths User’s Guide PN 3720771 April 2013 © 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
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Page 3: Table Of Contents
Table of Contents 1 Before You Start ......1 Symbols Used ......1 Safety Information . - Page 4 Front Panel ......23 Bath Tank and Lid ......25 Back Panel .
- Page 5 9.10.2 ALPHA ........48 9.11 Operating Parameters .
- Page 6 14.2 Chiller Parts and Controls ..... . 74 14.3 Chiller Controller Operation ....75...
- Page 7 Figures Figure 1 6020 Series of Calibration Baths ..... 9 Figure 2 Tipping Prevention Bracket Installation ....20 Figure 3 Front Panel Features .
- Page 8 Tables Table 1 International Electrical Symbols ..... 1 Table 2 Table of Various Fluids and Their Properties ....33 Table 3 Proportional Band —...
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Page 9: Before You Start
1 Before You Start Symbols Used Before You Start 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... -
Page 10: Safety Information
6020 Series Calibration Bath User’s Guide Symbol Description Canadian Standards Association OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re- fers to the level of Impulse Withstand Voltage protection provided. Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation. - Page 11 1 Before You Start Safety Information • Before initial use, or after transport, or after storage in humid or semi-hu- mid 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 re- quirements of the IEC 1010-1.
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Page 12: Cautions
6020 Series Calibration Bath User’s Guide • Be extremely careful when filling the bath and bringing it up to tempera- ture. Most fluids expand with temperature. It is easy to add fluid, but ex- tremely dangerous to remove hot fluid when the bath is over filled. DO NOT fill the bath above the indicated fill line when the stirring is on. - Page 13 1 Before You Start Safety Information • DO NOT overfill the bath. Overflowing liquid may damage the electrical system. Be sure to allow for thermal expansion of the fluid as the bath temperature increases. See Section 5.3, Bath Preparation and Filling, for specific instructions.
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Page 14: Authorized Service Centers
6020 Series Calibration Bath User’s Guide the bath by the tower, while the second person lifts from underneath the bath tank. • The control probe must be inserted through the lid into the bath fluid and plugged into the socket at the back of the bath. DO NOT operate the bath without the control probe properly inserted and attached. - Page 15 1 Before You Start Authorized Service Centers Phone: +86-10-6-512-3436 Telefax: +86-10-6-512-3437 E-mail: xingye.han@fluke.com.cn Fluke South East Asia Pte Ltd. Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace #03-16 The Comtech (Lobby D) 118502 SINGAPORE Phone: +65 6799-5588 Telefax: +65 6799-5588 E-mail: antng@singa.fluke.com When contacting these Service Centers for support, please have the following information available:...
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Page 17: Introduction
2 Introduction Introduction The Hart Scientific 6020 series hot baths are constant temperature baths in- tended mainly for the application of temperature calibration. However, their high stability and the availability of factory modifications, such as a circulation pump, make these baths suitable for other uses as well. -
Page 19: Specifications And Environmental Conditions
3 Specifications and Environmental Conditions Specifications Specifications and Environmental Conditions Specifications 6020 6021 6022 6024 Range 40°C to 300°C 40°C to 200°C 40°C to 300°C 40°C to 300°C Stability ±0.001°C at 40°C (water) ±0.003°C at 100°C (oil) ±0.005°C at 300°C (oil) Uniformity ±0.002°C at 40°C (water) ±0.004°C at 100°C (oil) -
Page 20: Environmental Conditions
6020 Series Calibration Bath User’s Guide Environmental Conditions These instruments have been designed for optimum durability and trouble-free operation, however, they 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. -
Page 21: Quick Start
4 Quick Start Unpacking Quick Start CAUTION: READ SECTION 6 ENTITLED BATH USE before placing the bath in service. Incorrect handling can damage the bath and void the war- ranty. This section gives a brief summary of the steps required to set up and operate the bath. -
Page 22: Power
6020 Series Calibration Bath User’s Guide Power Plug the bath power cord into a mains outlet of the proper voltage, frequency, and current capability. See Section 3.1, Specifications. Set the “HEATER” switch on the front panel to position “LOW” and turn the bath on using the front panel “POWER”... - Page 23 4 Quick Start Setting the Temperature Press “EXIT” and the bath temperature will be displayed again. Return to the temperature display Bath temperature display 24.73 C The bath will heat or cool until it reaches the new set-point temperature. Set the heater switch to position “HIGH”...
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Page 25: Installation
5 Installation Bath Environment Installation CAUTION: READ SECTION 6 ENTITLED BATH USE before placing the bath in service. Incorrect handling can damage the bath and void the warranty. This bath is not designed to be portable. Therefore, moving the bath once it has been installed should be kept to a minimum. -
Page 26: Dry-Out" Period
6020 Series Calibration Bath User’s Guide “Dry-out” Period Before initial use, after transport, and any time the instrument has not been en- ergized for more than 10 days, the bath needs to be energized for a “dry-out” period of 1-2 hours before it can be assumed to meet all of the safety require- ments of the IEC 1010-1. -
Page 27: Power
5 Installation Power Insert the probe into the 1/4 inch probe hole at the top left side of the bath lid. The tip of the probe must be well immersed in the fluid. The probe connector is plugged into the rear of the bath into the socket labeled “PROBE”. Power With the bath power switch off, plug the bath into an AC mains outlet of the appropriate voltage, frequency, and current capacity. -
Page 28: Figure 2 Tipping Prevention Bracket Installation
6020 Series Calibration Bath User’s Guide Caster Slots Wall Figure 2 Tipping Prevention Bracket Installation... -
Page 29: Bath Use
6 Bath Use General Bath Use CAUTION: Read before placing the bath in service. The information in this section is for general information only. It is not de- signed to be the basis for calibration laboratory procedures. Each laboratory will need to write their own specific procedures. General Be sure to select the correct fluid for the temperature range of the calibration. -
Page 30: Calibration Of Multiple Probes
6020 Series Calibration Bath User’s Guide the same time. However, stem effect from different types of probes is not to- tally eliminated. Even though all baths have horizontal and vertical gradients, these gradients are minimized inside the bath work area. See Section 7.2 enti- tled Bath Tank and Lid. -
Page 31: Parts And Controls
7 Parts and Controls Front Panel Parts and Controls Refer to the Appendix specific to your bath model for additional information on parts and controls. Front Panel The following controls and indicators are present on the controller front panel (see Figure 3 below): (1) the digital LED display, (2) the control buttons, (3) the bath on/off power switch, (4) the control indicator light, and (5) the heater power switch. -
Page 32: Figure 4 Typical 6020 Series Calibration Bath
When the indicator is red the heater is on, and when it is green the heater is off and the bath is cooling. Hart High Precision Bath Scientific 6021, 6022 only 6020, 6021, 6022, 6024 Figure 4 Typical 6020 Series Calibration Bath... -
Page 33: Bath Tank And Lid
7 Parts and Controls Bath Tank and Lid (5) The heater power switch is used to select the appropriate heater power lev- els for heating and controlling temperatures. Bath Tank and Lid The bath tank and lid assembly includes: (1) the tank, (2) the control probe, (3) the stir motor, (4) the access hole, (5) the access hole cover, and (6) the bath drain. -
Page 34: Back Panel
6020 Series Calibration Bath User’s Guide Back Panel The back panel of the bath contains the following features: (1) the bath power cord, (2) the stir motor power socket, (3) the system fuses (located internally), (4) the probe socket, (5) the RS-232 interface connector (optional), (6) the IEEE-488 interface connector (optional), (7) the cooling tubes, and (8) the bath drain. - Page 35 7 Parts and Controls Back Panel (7) The cooling tubes protrude from the bottom of the back of the bath. Cooling fluid may be circulated around the bath by pumping fluid through the tubes. (8) A drain valve is provided for ease of removing the fluid media from the bath.
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Page 37: General Operation
Bath Fluid General Operation Bath Fluid Many fluids work with the 6020 series baths. Choosing a fluid requires consid- eration of many important characteristics of the fluid. Among these are temper- ature range, viscosity, specific heat, thermal conductivity, thermal expansion, electrical resistivity, fluid lifetime, safety, and cost. -
Page 38: Thermal Conductivity
6020 Series Calibration Bath User’s Guide 8.1.4 Thermal Conductivity Thermal conductivity measures how easily heat flows through the fluid. Ther- mal conductivity of the fluid affects the control stability, temperature unifor- mity, and probe temperature settling time. Fluids with higher conductivity distribute heat more quickly and evenly improving bath performance. -
Page 39: Cost
8 General Operation Bath Fluid flash point. The flash point may be either of the open cup or closed cup type. Either condition may occur in a bath situation. The closed cup temperature is always the lower of the two. The closed cup represents the contained vapors in- side the tank and the open cup represents the vapors escaping the tank. -
Page 40: Silicone Oil
6020 Series Calibration Bath User’s Guide than water so temperature stability is not be as good. Mineral oil has very low electrical conductivity. Use caution with mineral oil since it is flammable and may also cause serious injury if inhaled or ingested. -
Page 41: Table 2 Table Of Various Fluids And Their Properties
8 General Operation Bath Fluid Table 2 Table of Various Fluids and Their Properties Fluid Lower Upper Specific Heat Thermal Thermal (# = Hart Part Temperature Temperature Flash Viscosity Specific (cal/g/°C) Conductivity Expansion Resistivity No.) Limit* Limit* Point (centistokes) Gravity (cal/s/cm/°C) (cm/cm/°C) -cm ) -
Page 42: Figure 6 Chart Of Various Bath Fluids
6020 Series Calibration Bath User’s Guide –100°C 0°C 100°C 200°C 300°C 400°C 500°C 600°C Silicone Oil FL 302°C 10 CS 5017 Silicone Oil FL 280°C 10 CS 5014 Silicone Oil FL 232°C 10 CS 5013 Silicone Oil FL 211°C 10 CS... -
Page 43: Stirring
8 General Operation Stirring Boiling Point: At or near the boiling point of the fluid, the temperature stabil- ity is difficult to maintain. Fuming or evaporation is excessive. Large amounts of heater power may be required because of the heat of vaporization. Decomposition: The temperature may reach a point at which decomposition of the fluid begins. -
Page 44: Cooling
6020 Series Calibration Bath User’s Guide Heater fuses are located internally. See Section 13, Troubleshooting, for more information Cooling WARNING: Do not use cooling water at temperatures approaching 100°C. When operating the bath at these high temperatures make sure the hoses are disconnected and completely drained, otherwise there may be danger of steam explosion. - Page 45 8 General Operation Temperature Controller enheit. The controller is operated and programmed from the front control panel using the four key switches and digital LED display. The controller may also be optionally equipped with an serial RS-232 or IEEE-488 GPIB digital interface for remote operation.
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Page 47: Controller Operation
9 Controller Operation Bath temperature Controller Operation This section discusses in detail how to operate the bath temperature controller using the front control panel. Using the front panel key switches and LED dis- play the user may monitor the bath temperature, set the temperature set-point in degrees C or F, monitor the heater output power, adjust the controller propor- tional band, set the cutout set-point, and program the probe calibration parame- ters, operating parameters, serial and IEEE-488 interface configuration, and... -
Page 48: Figure 7 Controller Operation Flowchart
6020 Series Calibration Bath User’s Guide Display Secondary Functions Temperature EXIT Display Power EXIT EXIT Reset Cutout Cutout Active Set Proportional Band EXIT Select Setpoint EXIT Set Cutout Temp. EXIT Adjust Setpoint EXIT Adjust Vernier EXIT EXIT Set Scale °C/°F... -
Page 49: Temperature Set-Point
9 Controller Operation Temperature Set-point rESEt ? Cutout reset function Press “SET” once more to reset the cutout. Reset cutout This also switchs the display to the set temperature function. To return to dis- playing the temperature press the “EXIT” button. If the cutout is still in the over-temperature fault condition the display continues to flash “cutout”. -
Page 50: Set-Point Value
6020 Series Calibration Bath User’s Guide 9.3.2 Set-point Value The set-point value may be adjusted after selecting the set-point memory and pressing “SET”. The set-point value is displayed with the units, C or F, at the left. Set-point 4 value in °C C 40.00... -
Page 51: Temperature Scale Units
9 Controller Operation Temperature Scale Units Temperature Scale Units The temperature scale units of the controller may be set by the user to degrees Celsius (°C) or Fahrenheit (°F). The units are used in displaying the bath tem- perature, set-point, vernier, proportional band, and cutout set-point. The temperature scale units selection is accessed after the vernier adjustment function by pressing “SET”. -
Page 52: Heater Power
6020 Series Calibration Bath User’s Guide Heater Power The temperature controller controls the temperature of the bath by pulsing the heater on and off. The total power being applied to the heater is determined by the duty cycle or the ratio of heater on time to the pulse cycle time. This value may be estimated by watching the red/green control indicator light or read di- rectly from the digital display. -
Page 53: Figure 8 Bath Temperature Fluctuation At Various Proportional Band Settings
9 Controller Operation Proportional Band cause the controller overreacts to temperature variations. For best control stability the proportional band must be set for the optimum width. Figure 8 Bath Temperature Fluctuation at Various Proportional Band Settings The optimum proportional band width depends on several factors among which are fluid volume, fluid characteristics (viscosity, specific heat, thermal conduc- tivity), heater power setting, operating temperature, and stirring. -
Page 54: Proportional Band - Fluid Table
6020 Series Calibration Bath User’s Guide tional band settings for optimum performance with a variety of fluids at se- lected temperatures. Table 3 Proportional Band — Fluid Table Proportional Band Fluid Temperature Heater Setting Stability Water 30.0°C 0.04°C ±0.0004°C Water 60.0°C... -
Page 55: Cutout
9 Controller Operation Cutout Cutout As a protection against software or hardware fault, shorted heater triac, or user error, the bath is equipped with an adjustable heater cutout device that will shut off power to the heater if the bath temperature exceeds a set value. This protects the heater and bath materials from excessive temperatures and, most impor- tantly, protects the bath fluids from being heated beyond the safe operating temperature preventing hazardous vaporization, breakdown, or ignition of the... -
Page 56: Controller Configuration
6020 Series Calibration Bath User’s Guide The next function is the configuration menu. Press “EXIT” to resume display- ing the bath temperature. Controller Configuration The controller has a number of configuration and operating options and calibra- tion parameters which are programmable via the front panel. These are ac- cessed from the secondary menu after the cutout set-point function by pressing “SET.”... -
Page 57: Cutout Reset Mode
9 Controller Operation Serial Interface Parameters Press “UP” to enter the menu. The operating parameters menu contains the cutout reset mode setting. 9.11.1 Cutout Reset Mode The cutout reset mode determines whether the cutout resets automatically when the bath temperature drops to a safe value or must be manually reset by the operator. -
Page 58: Sample Period
6020 Series Calibration Bath User’s Guide The baud rate of the bath serial communications may be programmed to 300,600,1200, or 2400 BAUD. Use “UP” or “DOWN” to change the baud rate value. New baud rate 2400 b Press “SET” to set the baud rate to the new value or “EXIT” to abort the opera- tion and skip to the next parameter in the menu. -
Page 59: Linefeed
9 Controller Operation IEEE-488 Parameters 9.12.4 Linefeed The final parameter in the serial interface menu is the linefeed mode. This pa- rameter enables (on) or disables (off) transmission of a linefeed character (LF, ASCII 10) after transmission of any carriage-return. The linefeed parameter is indicated by, Serial linefeed parameter Press “SET”... -
Page 60: Calibration Parameters
6020 Series Calibration Bath User’s Guide 9.14 Calibration Parameters The operator of the bath controller has access to a number of the bath calibra- tion constants namely CTO, C0, CG, H, and L. These values are set at the fac- tory and must not be altered. -
Page 61: Digital Communication Interface
10 Digital Communication Interface Serial Communications Digital Communication Interface If supplied with the option, the bath is capable of communicating with and be- ing controlled by other equipment through the digital interface. Two types of digital interface are available — the RS-232 serial interface and the IEEE-488 GPIB interface. -
Page 62: Wiring
6020 Series Calibration Bath User’s Guide 10.1.1 Wiring The serial communications ca- ble attaches to the bath through the DB-9 connector at the back of the instrument. Figure 9 shows the pin-out of this con- nector and suggested cable wir- ing. -
Page 63: Duplex Mode
10 Digital Communication Interface IEEE-488 Communication (optional) PLE”. The sample period is the time period in seconds between temperature measurements transmitted from the serial interface. If the sample rate is set to 5, the bath transmits the current measurement over the serial interface approxi- mately every five seconds. -
Page 64: Ieee-488 Operation
6020 Series Calibration Bath User’s Guide pressing “SET” and release to enter the secondary menu. Press “SET” repeat- edly until the display reaches “PrObE”. This is the menu selection. Press “UP” repeatedly until the IEEE-488 interface menu is indicated with “IEEE”. Press “SET”... -
Page 65: Power Control Functions
To allow the interface to control the heating, the front panel controls are dis- abled by switching the heater switch to “LOW”. Otherwise, the interface can not switch the heater functions off. The 6020 series baths have one control function with the digital interface. This control function is for the heater settings. -
Page 66: Interface Command Summary
6020 Series Calibration Bath User’s Guide Table 5 Interface Command Summary Command Command Returned Acceptable Command Description Format Example Returned Example Values Display Temperature Read current set-point s[etpoint] set: 9999.99 {C or F} set: 150.00 C Set current set-point to n... -
Page 67: Power Control Functions
10 Digital Communication Interface Power Control Functions Interface Command Summary continued Command Command Returned Acceptable Command Description Format Example Returned Example Values Set cutout to be reset cm[ode]=a[uto] cm=a automatically Serial Interface Menu Read serial sample setting sa[mple] sa: 9 sa: 1 Set serial sampling setting to n sa[mple]=n... -
Page 69: Calibration Procedure
11 Calibration Procedure Calibration Points Calibration Procedure In some instances the user may want to calibrate the bath to improve the tem- perature set-point accuracy. Calibration is done by adjusting the controller probe calibration constants R0 and ALPHA so that the temperature of the bath as measured with a standard thermometer agrees more closely with the bath set-point. -
Page 70: Calibration Example
6020 Series Calibration Bath User’s Guide The user should keep a record of these values in case they may need to be re- stored in the future. The new values R0′ and ALPHA′ are computed by entering the old values for R0 and ALPHA, the calibration temperature set-points t... -
Page 71: Figure 10 Calibration Example
11 Calibration Procedure Calibration Example R0 = 100.000 ALPHA = 0.0038500 = 80.00°C measured t = 79.843°C = 120.00°C measured t = 119.914°C Compute errors, = 79.843 - 80.00°C = -0.157°C = 119.914 - 120.00°C = -0.086°C Compute R0, ⎡ ⎤... -
Page 73: Maintenance
12 Maintenance Maintenance The calibration instrument has been designed with the utmost care. Ease of op- eration and simplicity of maintenance have been a central theme in the product development. Therefore, with proper care the instrument should require very little maintenance. Avoid operating the instrument in dirty or dusty environments. -
Page 74: Draining The Bath
6020 Series Calibration Bath User’s Guide • If the mains supply cord becomes damaged, replace it with a cord with the appropriate gauge wire for the current of the bath. If there are any questions, call an Authorized Service Center for more information. - Page 75 12 Maintenance Draining the Bath how rapidly it drains as well as how well it flows off of the walls. Heat proof containers and appropriate safety equipment such as face shields, gloves and body covering should be used. WARNING: Extreme danger of BURNS and FIRE. Use safety equipment. Use proper equipment, and have fire safety equipment standing by.
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Page 77: Troubleshooting
13 Troubleshooting Troubleshooting Troubleshooting 13.1 Troubleshooting In the event the bath appears to function abnormally this section may help to find and solve the problem. Several possible problem conditions are described along with likely causes and solutions. If a problem arises please read this sec- tion carefully and attempt to understand and solve the problem. - Page 78 6020 Series Calibration Bath User’s Guide Problem Causes and Solutions The display flashes Low battery. A problem could exist with the memory back-up battery. If the bat- “Cutout” alternately with tery voltage is insufficient to maintain the memory, data may become scrambled an incorrect process causing problems.
- Page 79 13 Troubleshooting Troubleshooting Problem Causes and Solutions The controller shows that If the bath does not achieve the expected degree of temperature stability when it is controlling at the measured using a thermometer, consider the following: proper temperature, but the bath temperature is Wrong proportional band setting.
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Page 81: Appendix - Model 6021
14 Appendix – Model 6021 Installation Appendix – Model 6021 The Hart Scientific 6021 is a heated bath adapted for use with a chiller. A switch on the back of the controller permits the use of the chiller in an auto- mated or manual mode. - Page 82 6020 Series Calibration Bath User’s Guide the chiller operation, but the chiller mode cannot override the high heat mode. The chiller option can only be used when the bath is in low heat mode. The bath operates as such, since it is not capable of supplying the current required to run a chiller and high heat mode simultaneously.
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Page 83: Figure 11 6021 Back Panel
14 Appendix – Model 6021 Chiller Controller Operation (Optional) (Optional) IEEE-488 RS-232 PROBE STIRRER COOLING TUBES aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa Figure 11 6021 Back panel 14.3 Chiller Controller Operation Sections 8 (General Operation), 9 (Controller Operation), and 10 (Digital Com- munications) of this manual explain the general operation, controller operation, and digital communications for the 6021 bath.