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Via Acquanera, 29
22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
info@calpower.it
www.calpower.it
PN 3720821
March 2013
© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
Model 7011
Temperature Bath
User's Guide
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Table of Contents
Related Manuals for Fluke 7011
Summary of Contents for Fluke 7011
- Page 1 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it Model 7011 Temperature Bath User’s Guide PN 3720821 March 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 8 General Operation ......25 Heat Transfer Fluid ......25 8.1.1 Temperature Range .
- Page 5 9.12.1 CTO ........45 9.12.2 H and L .
- Page 6 Figures and Tables Figure 1 Bath Assembly ......7 Figure 2 Front Panel .
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Page 7: 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 8: Safety Information
7011 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 9 1 Before You Start Safety Information period of 2 hours before it can be assumed to meet all of the safety re- quirements of the IEC 1010-1. If the product is wet or has been in a wet environment, take necessary measures to remove moisture prior to apply- ing power such as storage in a low humidity temperature chamber operat- ing at 50 degree centigrade for 4 hours or more.
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Page 10: Cautions
7011 Calibration Bath User’s Guide • The instrument is equipped with a soft cutout (user settable firmware) and a hard cutout (set at the factory). Check the flash point, boiling point, or other fluid characteristic applicable to the circumstances of the unit opera- tion. -
Page 11: Authorized Service Centers
Wait until the power has stabilized before re-energizing the instrument. Authorized 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 Phone: +1.801.763.1600 Telefax: +1.801.763.1010... - Page 12 7011 Calibration Bath User’s Guide Beijing 100004, PRC CHINA 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...
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Page 13: Introduction
User interface is provided by the 8-digit LED display and four key-switches. The tank for the 7011 is stainless steel and holds 25 liters. The 7011 uses a re- frigeration system that is CFC free. -
Page 15: Specifications And Environmental Conditions
3 Specifications and Environmental Conditions Specifications Specifications and Environmental Conditions Specifications –10°C to 110°C (14°F to 230°F) Range ±0.0008°C at 0°C (ethanol) Stability ±0.0008°C at 25°C (water) ±0.003°C at 100°C (oil 5012) Uniformity ±0.003°C at 0°C (ethanol) ±0.002°C at 25°C (water) ±0.004°C at 100°C (oil 5012) Temperature Setting Digital display with push-button data entry... -
Page 16: Environmental Conditions
7011 Calibration Bath User’s Guide Environmental Conditions Although the instrument has been designed for optimum durability and trou- ble-free operation, it must be handled with care. The instrument should not be operated in an excessively dusty or dirty environment. Maintenance and clean- ing recommendations can be found in the Maintenance Section of this manual. -
Page 17: Quick Start
This section gives a brief summary of the steps required to set up and operate the 7011 bath. This should be used as a general overview and reference and not as a substitute for the remainder of the manual. Please read Sections 5 through 7 carefully before operating the bath. -
Page 18: Power
7011 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 for power details. Set the “HEATER” switch on the front panel to position “LOW” and turn the bath on using the front panel “POWER”... - Page 19 4 Quick Start Setting the Temperature Store new set-point, access vernier 0.00000 Current vernier value Press “EXIT” and the bath temperature will be displayed again. Return to the temperature display 24.73 C Bath temperature display 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 21: Installation
Installation Bath Environment The Model 7011 Bath is a precision instrument which should be located in an appropriate environment. The location should be free of drafts, extreme temper- atures and temperature changes, dirt, etc. The surface where the bath is placed must be level. -
Page 22: Probe
7011 Calibration Bath User’s Guide • Methanol • Mineral oil • Silicone oil Fluids are discussed in detail in Section 8.1. Remove any access hole cover from the bath and check the tank for foreign matter (dirt, remnant packing material, etc.). Use clean unpolluted fluid. Care- fully fill the bath through the large square access hole to a level that will allow for stirring and thermal expansion. -
Page 23: Bath Use
6 Bath Use General Bath Use 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 24: Calibration Of Multiple Probes
7011 Calibration Bath User’s Guide these gradients are minimized inside the bath work area. Nevertheless, probes should be inserted to the same depth in the bath liquid. Be sure that all probes are inserted deep enough to prevent stem effect. From research at Hart Scien- tific, we suggest a general rule-of-thumb for immersion depth to reduce the stem effect to a minimum: 15 x the diameter of the UUT + the sensor length. -
Page 25: Parts And Controls
When the indicator is red the heater is on, and when it is green the heater is off and the bath is cooling. 7011 HIGH PRECISION BATH –10°C to 110°C... -
Page 26: Side Panel
7011 Calibration Bath User’s Guide When the indicator “toggles” red/green it has reached the set-point and is at- tempting to control at that temperature. (5) The heater power switch is used to select the appropriate heater power lev- els for heating and controlling the bath at various temperatures. -
Page 27: Back Panel
7 Parts and Controls Back Panel For this bath: Set the Cooling Temp. Valve to this pressure Control Temperature °C °F Nominal Cooling PSIG –10 –5 14.5 20.7 27.9 36.1 45.5 56.2 68.4 82.1 98.6 DO NOT set the Cooling Pressure above 90 PSIG 3) The COOLING TEMP gauge is used to indicate the temperature at which the refrigerant is evaporating. -
Page 28: Lid
7011 Calibration Bath User’s Guide Figure 4 Back Panel 7) The model and power are located on the label near the top of the back panel. When consulting with the factory use the model number. There are two different types of lids. They all have the same overall dimensions but the optional lid (see Figure 5) has a recirculating pump and the standard lid has a stirring motor with rectangular access hole. -
Page 29: Figure 5 Lid Options
7 Parts and Controls 2) The thermometer/liquid level is a hole in the lid for filling and removing of liquid, checking liquid level and for mounting a thermometer. A hole may be drilled in the rubber stopper supplied for inserting a thermometer into the bath. - Page 30 7011 Calibration Bath User’s Guide stant temperature stability and uniformity. The stir motor power cord plugs into the back of the bath at the power socket labeled “STIRRER”. 5) The probe hole is for the temperature controller probe. The probe must...
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Page 31: General Operation
Heat Transfer Fluid General Operation Heat Transfer Fluid Many fluids will work with the 7011 bath. Choosing a fluid requires consider- ation of many important characteristics of the fluid. Among these are tempera- ture range, viscosity, specific heat, thermal conductivity, thermal expansion, electrical conductivity, fluid lifetime, safety, and cost. -
Page 32: Thermal Conductivity
7011 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 33: Fluid Lifetime
8 General Operation Heat Transfer Fluid 8.1.8 Fluid Lifetime Many fluids degrade over time because of evaporation, water absorption, gel- ling, or chemical breakdown. Often the degradation becomes significant near the upper temperature limit of the fluid. 8.1.9 Cost Cost of bath fluids may vary greatly, from cents per gallon for water to hun- dreds of dollars per gallon for synthetic oils. -
Page 34: Silicone Oil
7011 Calibration Bath User’s Guide fume hood is highly recommended. As with most oils mineral oil will expand as temperature increases so be careful not to fill the bath too full that it over- flows when heated. The viscosity and thermal characteristics of mineral oil is poorer than water so temperature stability will not be as good. - Page 35 8 General Operation Heat Transfer Fluid Table 2 Table of various fluids and their properties Fluid Lower Upper Specific Heat Thermal Thermal (# = Hart Part No.) Temperature Temperature Flash Viscosity Specific (cal/g/°C) Conductivity Expansion Resistivity Ω-cm ) Limit* Limit* Point (centistokes) Gravity...
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Page 36: Figure 6 Chart Of Various Bath Fluids And Their Properties
7011 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 37: 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 38: Cooling
7011 Calibration Bath User’s Guide Cooling The BACK PRESSURE control valve limits the cooling capacity of the unit. It will normally be open all the way (full CCW) for temperature slewing and op- eration. If during operation the front panel meter indicates excessive cooling, this valve is closed partially (turn CW) until the percentage of heating to cool- ing is brought into line. - Page 39 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. Operation of the control- ler using the front control panel is discussed in Section 9. When the controller is set to a new set-point the bath will heat or cool to the new temperature.
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Page 41: 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 cut-out set-point, and program the probe calibration param- eters, operating parameters, serial and IEEE-488 interface configuration, and... -
Page 42: Figure 7 Controller Flowchart
7011 Calibration Bath User’s Guide Figure 7 Controller Flowchart... -
Page 43: Temperature Set-Point
9 Controller Operation Temperature Set-point rESEt ? Cutout reset function Press “SET” once more to reset the cutout. Reset cutout This will also switch the display to the set temperature function. To return to displaying the temperature press the “EXIT” button. If the cutout is still in the over-temperature fault condition the display will continue to flash “Cutout”. -
Page 44: Set-Point Value
7011 Calibration Bath User’s Guide Accept selected set-point memory 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. -
Page 45: Temperature Scale Units
9 Controller Operation Temperature Scale Units Access 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 will be used in displaying the bath temperature, set-point, vernier, proportional band, and cutout set-point. -
Page 46: Secondary Menu
7011 Calibration Bath User’s Guide Secondary Menu Functions which are used less often are accessed within the secondary menu. The secondary menu is accessed by pressing SET and EXIT simultaneously and then releasing. The first function in the secondary menu is the heater power display. -
Page 47: Figure 8 Bath Temperature Fluctuation At Various Proportional Band Settings
9 Controller Operation Proportional Band tional band is too narrow the bath temperature may swing back and forth be- 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-... -
Page 48: Cutout
7011 Calibration Bath User’s Guide Table 3 Proportional Band — Fluid Table Proportional Fluid Temperature Heater Setting Band Stability Water 30.0°C 0.04°C ±0.0004°C Water 60.0°C 0.04°C ±0.001°C Eth-Gly 50% 35.0°C 0.05°C ±0.0005°C Eth-Gly 50% 60.0°C 0.05°C ±0.001°C Eth-Gly 50% 100.0°C High 0.4°C... - Page 49 9 Controller Operation Cutout panel of the controller. It must always be set below the upper temperature limit of the fluid and no more than 10 degrees above the upper temperature limit of the bath. If the cutout is activated because of excessive bath temperature then power to the heater will be shut off and the bath will cool.
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Page 50: Controller Configuration
7011 Calibration Bath User’s Guide 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 51: Cutout Reset Mode
Press “SET” five times to enter the menu. 9.12.1 Parameter CTO sets the calibration of the over-temperature cutout. This is not adjustable by software but is adjusted with an internal potentiometer. For the 7011 bath this parameter should read between 110 and 130. -
Page 52: H And L
7011 Calibration Bath User’s Guide 9.12.2 H and L These parameters set the upper and lower set-point limits of the bath. DO NOT change the values of these parameters from the factory set values. To do so may present danger of the bath exceeding its temperature range causing damage or... -
Page 53: Bath Calibration
10 Bath Calibration Calibration Points Bath Calibration 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 DO and DG so that the temperature of the bath as measured with a standard thermometer agrees more closely with the bath set-point. -
Page 54: Figure 9 Sample Calibration Computations
7011 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 DO′ and DG′ are computed by entering the old values for DO and DG, the calibration temperature set-points t... -
Page 55: Calibration Example
10 Bath Calibration Calibration Example If for example DO and DG were previously set for -25.229 and 186.9740 re- spectively and the data for t , err , and err were as given above then the new values DO′ and DG′ would be computed as -24.627 and 185.728 respec- tively. -
Page 57: Maintenance
11 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 58: Draining The Bath
7011 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, contact an Authorized Service Center for more information. - Page 59 11 Maintenance Draining the Bath 1. Water and low viscosity fluids - Drain at room temperature. Normal care must be taken for fluids that may have corrosive or damaging effects on the surrounding facility or equipment. 2. High viscosity oils - The fluid should be sufficiently low in viscosity to drain efficiently.
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Page 61: Troubleshooting
12 Troubleshooting Troubleshooting Troubleshooting This section contains information on troubleshooting and CE Comments. This information pertains to a number of bath models and certain specifics may not pertain to your model. 12.1 Troubleshooting In the event that the instrument appears to function abnormally, this section may help to find and solve the problem. - Page 62 7011 Calibration Bath User’s Guide Problem Causes and Solutions The display flashes “cutout” and The problem may be that the controller’s voltmeter circuit is not func- an incorrect process temperature tioning properly. • A problem could exist with the memory back-up battery.
- Page 63 12 Troubleshooting Troubleshooting Problem Causes and Solutions The controller controls or at- The controller operates normally except when controlling at a speci- tempts to control at an inaccurate fied set-point. At this set-point, the temperature displayed does not temperature agree with the temperature measured by the user’s reference ther- mometer to within the specified accuracy.
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Page 64: Comments
7011 Calibration Bath User’s Guide Problem Causes and Solutions The bath does not achieve low Too much heating or not enough cooling can cause this problem. temperatures • Check that the control indicator glows green showing that the controller is attempting to cool. The heaters may be disabled as a test by temporarily removing the heater fuses.