Table of Contents
Advertisement
Quick Links
Via Acquanera, 29
22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
info@calpower.it
www.calpower.it
January 2013
© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
6331
Calibration Bath
User's Guide
Advertisement
Table of Contents
Related Manuals for Fluke Calibration CalPower 6331
Summary of Contents for Fluke Calibration CalPower 6331
- Page 1 Via Acquanera, 29 22100 Como tel. 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it 6331 Calibration Bath User’s Guide January 2013 © 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
-
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 ......24 Back Panel.
- Page 5 Secondary Menu......45 Heater Power ......45 Proportional Band .
- Page 6 12 Maintenance ......69 13 Troubleshooting......71 13.1 Troubleshooting .
- Page 7 Figures Figure 1 Stir Baffle Fill Levels ......13 Figure 2 Tipping Prevention Bracket Installation ....18 Figure 3 Front Panel Features .
- Page 8 Tables Table 1 International Electrical Symbols ..... 1 Table 2 Table of Bath Fluids ......32 Table 3 Program Mode Setting Actions .
-
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
6331 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 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°C for 4 hours or more.
-
Page 12: Cautions
6331 Calibration Bath User’s Guide • High voltage is used in the operation of this equipment. Severe injury or death may result if personnel fail to observe the safety precautions. Before working inside the equipment, turn off the power and disconnect the power cord. -
Page 13: Authorized Service Centers
1 Before You Start Authorized Service Centers • Silicon oil can condense on the bath during normal operation. See Section 12, Maintenance, for cleaning instructions. • Most probes have handle temperature limits. Be sure that the probe handle temperature limit is not exceeded in the air above the instrument. •... - Page 14 6331 Calibration Bath User’s Guide 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: •...
-
Page 15: Introduction
2 Introduction Introduction The Hart Scientific Model 6331 is a compact constant temperature bath useful in temperature calibration and other applications requiring stable temperatures. An innovative state of the art solid-state temperature controller has been incor- porated which maintains the bath temperature within extreme stability. The temperature controller uses a micro-controller to execute the many operating functions. -
Page 16: Specifications And Environmental Conditions
3 Specifications and Environmental Conditions Specifications Specifications and Environmental Conditions Specifications Range 35°C to 300°C ±0.007°C at 100°C (oil 5012) Stability (2 sigma) ±0.010°C at 200°C (oil 5017) ±0.015°C at 300°C (oil 5017) Uniformity ±0.007°C at 100°C (oil 5012) ±0.017°C at 200°C (oil 5017) ±0.025°C at 300°C (oil 5017) 140 minutes, from 35°C to 300°C (oil 5017) Heating Time... -
Page 17: Environmental Conditions
6331 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 18: 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 19: Set Up
6331 Calibration Bath User’s Guide Set Up WARNING: 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 instrument operation. -
Page 20: Figure 1 Stir Baffle Fill Levels
4 Quick Start Set Up CAUTION: When filling the tank, ensure the heating coils are completely covered. DO NOT FILL ABOVE THE STIR BAFFLE. See Figure 1. Maximum Fill Level Top of Baffle Minimum Fill MIN FILL Level Line Figure 1 Stir Baffle Fill Levels An overflow drain is provided for excess bath fluid due to expansion. -
Page 21: Power
6331 Calibration Bath User’s Guide Power Plug the bath power cord into a mains outlet of the proper voltage, frequency, and current capability. Refer to Section 3.1, Specifications, for details. Turn the bath on using the front panel “POWER” switch. The bath begins to heat or cool to reach the previously programmed tempera- ture set-point. - Page 22 4 Quick Start Setting the Temperature Current vernier value 0.00000 Press “EXIT” and the bath temperature is displayed again. Return to the temperature display Bath temperature display 24.73 C The bath heats or is allowed to cool until it reaches the new set-point temperature.
-
Page 23: Installation
5 Installation Moving or Uncrating the Bath Installation CAUTION: READ SECTION 6 ENTITLED BATH USE before placing the bath in service. Incorrect handling can damage the bath and void the war- ranty. Moving or Uncrating the Bath The bath is equipped with casters and should be rolled. It is not equipped with handles and is not designed to be lifted. -
Page 24: Installation On A Wood Floor
6331 Calibration Bath User’s Guide 5.3.1 Installation On A Wood Floor The wood floor installation kit includes lag bolts. Drill three 1/8 inch x 1 inch deep (approximately 3 mm x 25.5 mm) pilot holes using the bracket to mark the hole placement. -
Page 25: Dry-Out" Period
5 Installation “Dry-out” Period If you have any questions concerning installation of the tipping prevention bracket, please contact an Authorized Service Center (see Section 1.3). “Dry-out” Period If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. - Page 26 6331 Calibration Bath User’s Guide Refer to and read the CAUTION at the front of the manual concerning brown- out and over voltage protection. Check the back label for the correct voltage and frequency prior to energizing the bath.
-
Page 27: Bath Use
6 Bath Use General Bath Use CAUTION: Read this section before placing the bath into 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 needs to write their own specific procedures. -
Page 28: Calibration Of Multiple Probes
6331 Calibration Bath User’s Guide tally eliminated. Even though all baths have horizontal and vertical gradients, these gradients are minimized inside the bath work area. Nevertheless, probes should be inserted to the same depth in the bath fluid. Be sure that all probes are inserted deep enough to prevent stem effect. -
Page 30: Bath Tank And Lid
6331 Calibration Bath User’s Guide EXIT – Used to exit from a menu. When EXIT is pressed, any changes made to the displayed value are ignored. 5) The control indicator is a two color light emitting diode (LED). This in- dicator lets the user visually see the ratio of heating to cooling. -
Page 31: Fluid Expansion Reservoir
7 Parts and Controls Back Panel 7.3.1 Fluid Expansion Reservoir The fluid expansion reservoir is attached to the rear panel of the bath. Its pur- pose is to receive excess fluid expanded in the process of heating the bath to higher temperatures. -
Page 32: General Operation
8 General Operation Heat Transfer Fluid General Operation Heat Transfer Fluid Many fluids work with the 6331 bath. Choosing a fluid requires consideration of many important characteristics of the fluid. Among these are temperature range, viscosity, specific heat, thermal resistivity, thermal expansion, electrical resistivity, fluid lifetime, safety, and cost. -
Page 33: Specific Heat
6331 Calibration Bath User’s Guide 8.1.3 Specific Heat Specific heat is the measure of the heat storage ability of the fluid. Specific heat, to a small degree, affects the control stability. It also affects the heating and cooling rates. Generally, a lower specific heat means quicker heating and cooling. -
Page 34: Electrical Resistivity
8 General Operation Heat Transfer Fluid Example: The final depth of Dow Corning 710 silicone oil in the bath tank is to be 9.2 inches when heated from 25 to 300°C. What should the starting depth be? Expansion coefficient for 710 oil on Table 2, K= 0.00077 inch/inch/°C Ending temperature, T = 300°C Starting temperature, T... -
Page 35: Cost
6331 Calibration Bath User’s Guide sured with the vapors being contained within the tank. Since oxygen and an ig- nition source are less available inside the tank, the closed cup flash point is lower than the open cup flash point. Environmentally hazardous fluids require special disposal according to applica- ble federal or local laws after use. -
Page 36: Silicone Oil
8 General Operation Heat Transfer Fluid tion with mineral oil since it is flammable and may also cause serious injury if inhaled or ingested. 8.1.10.4 Silicone Oil Silicone oils are available which offer a much wider operating temperature range than mineral oil. Like most oils, silicone oils have temperature control characteristics which are somewhat poorer than water. -
Page 37: Table 2 Table Of Bath Fluids
6331 Calibration Bath User’s Guide Table 2 Table of Bath Fluids Fluid Lower Upper Thermal Thermal (# = Hart Part No.) Temperature Temperature Flash Viscosity Specific Specific Heat Conductivity Expansion Resistivity Limit* Limit* Point (centistokes) Gravity (cal/g/°C) (cal/s/cm/°C) (cm/cm/°C) -cm ) Halocarbon 0.8 –100°C (v)** 70°C (e) -
Page 38: Figure 4 Chart Showing Usable Range Of Various Fluids
8 General Operation Heat Transfer Fluid Figure 4 Chart Showing Usable Range Of Various Fluids for bath applications. Optimum stirring generally occurs at 10 centistokes and below. Fume Point: Indicates the point at which a fume hood or ventilation system must be used to prevent health hazards posed by fume vapors. -
Page 39: Stirring
6331 Calibration Bath User’s Guide Flash Point: The point at which ignition may occur. The point shown may be either the open or closed cup flash point. Refer to the flash point discussion in Section 8.1.8, Safety. Boiling Point: At or near the boiling point of the fluid, the temperature stabil- ity is difficult to maintain. -
Page 40: Temperature Controller
8 General Operation Temperature Controller Temperature Controller The bath temperature is controlled by Hart Scientific’s unique hybrid digi- tal/analog temperature controller. The controller offers the tight control stability of an analog temperature controller as well as the flexibility and programmabil- ity of a digital controller. -
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 cutout set-point, and program the probe calibration parame- ters, operating parameters, serial and IEEE-488 interface configuration, and... -
Page 42: Figure 5 Controller Operation Flowchart
6331 Calibration Bath User’s Guide Display Program Menu EXIT Temperature Number of Set-points EXIT Reset Cutout Select Set-point Adjust Set-point Cutout Active EXIT Select Setpoint EXIT Soak Time SECONDARY FUNCTIONS EXIT Adjust Setpoint EXIT Program Function Mode Display Power EXIT EXIT Adjust Vernier EXIT... -
Page 43: Temperature Set-Point
9 Controller Operation Temperature Set-point Cutout reset function rESEt ? Press “SET” once more to reset the cutout. Reset cutout This action also switches 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 continues to flash “cutout.”... -
Page 44: Set-Point Value
6331 Calibration Bath User’s Guide New set-point memory 4, 40.0°C 40.0 Press “SET” to accept the new selection and access the set-point value. 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”. -
Page 45: Scan
9 Controller Operation Scan Increment display New vernier setting 0.00090 Next press “EXIT” to return to the temperature display or “SET” to access the temperature scale units selection. Access scale units Scan The scan rate can be set and enabled so that when the set-point is changed the instrument heats or cools at a specified rate (degrees per minute) until it reaches the new set-point. -
Page 46: Temperature Scale Units
6331 Calibration Bath User’s Guide Sr=2.0 New scan rate Press “SET” to accept the new scan rate and continue. 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. -
Page 47: Ramp And Soak Program
9 Controller Operation Ramp and Soak Program Set the new units and resume temperature display Ramp and Soak Program The ramp and soak program feature allows the user to program a number of set-points and have the instrument automatically cycle between the tempera- tures, holding at each for a length of time. -
Page 48: Program Soak Time
6331 Calibration Bath User’s Guide Use the “UP” or “DOWN” buttons to select any of the set-points. 3 30.0 Third set-point Press “SET” to be able to change the set-point. C 30.00 Set-point value Use “UP” and “DOWN” to change the set-point value. New set-point value C 40.00 Press “SET”... -
Page 49: Program Control
9 Controller Operation Secondary Menu Pf=4 New mode Press “SET” to continue. Table 3 Program Mode Setting Actions Function Action up-stop up-down-stop up-repeat up-down-repeat Enter program menu 9.6.5 Program Control The final parameter in the program menu is the control parameter. Three op- tions are available for controlling the ramp and soak program. -
Page 50: Proportional Band
6331 Calibration Bath User’s Guide may be estimated by watching the red/green control indicator light or read di- rectly from the digital display. By knowing the amount of heating, the user can tell if the bath is heating up to the set-point, cooling down, or controlling at a constant temperature. -
Page 51: Figure 6 Bath Temperature Fluctuation At Various Proportional Band Settings
9 Controller Operation Proportional Band The temperature stability of the bath depends on the width of the proportional band (see Figure 6). Figure 6 Bath Temperature Fluctuation At Various Proportional Band Settings If the band is too wide, the bath temperature deviates excessively from the set-point due to varying external conditions. -
Page 52: Table 4 Proportional Band - Fluid Table
6331 Calibration Bath User’s Guide Table 4 Proportional Band — Fluid Table Fluid Temperature Proportional Band Stability ±0.003°C Water 30.0°C 0.2°C ±0.003°C Water 60.0°C 0.2°C ±0.001°C Eth-Gly 50% 35.0°C 0.05°C ±0.001°C Eth-Gly 50% 60.0°C 0.05°C ±0.007°C Eth-Gly 50% 100.0°C 0.1°C ±0.004°C Oil 200.10 35.0°C... -
Page 53: Cutout
9 Controller Operation Cutout Accept the new proportional band setting 9.10 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 shuts 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 54: Controller Configuration
6331 Calibration Bath User’s Guide Decrement display New cutout set-point CO= 95C To accept the new cutout set-point press “SET”. Accept cutout set-point The next function is the configuration menu. Press “EXIT” to resume display- ing the bath temperature. 9.11 Controller Configuration The controller has a number of configuration and operating options and calibra- tion parameters which are programmable via the front panel. -
Page 55: Alpha
9 Controller Operation Operating Parameters 9.12.2 ALPHA This probe parameter refers to the average sensitivity of the probe between 0 and 100°C. Normally this is set for 0.00385°C 9.13 Operating Parameters The operating parameters menu is indicated by, Operating parameters menu Press “UP”... -
Page 56: Serial Interface Parameters
6331 Calibration Bath User’s Guide BooSt Boost heater mode Press "SET" to choose the mode. The current mode is displayed. b=Auto Current mode setting Select the mode with "UP" or "DOWN" then press "SET" to accept the desired mode. b= USEr 9.14 Serial Interface Parameters The serial RS-232 interface parameters menu is indicated by,... -
Page 57: Sample Period
9 Controller Operation Serial Interface Parameters 9.14.2 Sample Period The sample period is the next parameter in the serial interface parameter menu. The sample period is the time period in seconds between temperature measure- ments transmitted from the serial interface. If the sample rate is set to five, the bath transmits the current measurement over the serial interface approximately every five seconds. -
Page 58: Ieee-488 Parameters
6331 Calibration Bath User’s Guide Press “SET” to access the linefeed parameter. Current linefeed setting LF= On The mode may be changed using “UP” or “DOWN” and pressing “SET”. New linefeed setting LF= OFF 9.15 IEEE-488 Parameters Baths may optionally be fitted with an IEEE-488 GPIB interface. In this case the user may set the interface address and the transmission termination charac- ter within the IEEE-488 parameter menu. -
Page 59: Calibration Parameters
9 Controller Operation Calibration Parameters EOS=Cr Present IEEE-488 termination Use “UP” or “DOWN” to change the selection. EOS=LF New termination selection Use “SET” to save the new selection. 9.16 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. -
Page 60: Digital Communication Interface
10 Digital Communication Interface Serial Communications Digital Communication Interface The 6331 bath is capable of communicating with and being controlled by other equipment through the digital interface. Two types of digital interface are avail- able—the RS-232 serial interface which is standard and the IEEE-488 GPIB interface. -
Page 61: Baud Rate
6331 Calibration Bath User’s Guide is the menu selection. Press “UP” repeatedly until the serial interface menu is indicated with “SErIAL”. Finally press “SET” to enter the serial interface pa- rameters menu. In the serial interface parameters menu are the baud rate, sam- ple rate, duplex mode, and linefeed parameters. -
Page 62: Ieee-488 Communication (Optional)
10 Digital Communication Interface IEEE-488 Communication (optional) set the bath and view or program the various parameters. The interface com- mands are discussed in Section 10.3, Interface Commands. All commands are ASCII character strings terminated with a carriage-return character (CR, ASCII 13). - Page 63 6331 Calibration Bath User’s Guide with both the RS-232 serial interface and the IEEE-488 GPIB interface. In ei- ther case the commands are terminated with a carriage-return character (Cr, ASCII 13). The interface makes no distinction between upper and lower case letters, hence either may be used.
-
Page 64: Table 5 Interface Command Summary
10 Digital Communication Interface Interface Commands 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 s[etpoint]= n s=300 Instrument... -
Page 65: Table 5 Interface Command Summary Continued
6331 Calibration Bath User’s Guide Interface Command Summary continued Command Command Returned Acceptable Command Description Format Example Returned Example Values Read program function pf: 9 pf: 3 Set program function to n pf= n pf=2 1 to 4 Secondary Menu Read proportional band setting pr[op-band] pb: 9.999... - Page 66 10 Digital Communication Interface Interface Commands Interface Command Summary continued Command Command Returned Acceptable Command Description Format Example Returned Example Values Read CG calibration parameter cg: 999.99 cg: 406.25 Set CG calibration parameter to n *cg=n *cg=406.25 unlimited Read Boost Heater mode bo[ost] bo: xxxx bo: auto...
-
Page 67: Calibration Procedure
11 Calibration Procedure Calibration Points Calibration Procedure Note: This procedure is to be considered a general guideline. Each labo- ratory should write their own procedure based on their equipment and their quality program. Each procedure should be accompanied by an un- certainty analysis also based on the laboratory's equipment and environ- ment. -
Page 68: Computing R0 And Alpha
6331 Calibration Bath User’s Guide 11.3 Computing R0 and ALPHA Before computing the new values for R and ALPHA, the current values must be known. The values may be found by either accessing the probe calibration menu from the controller panel or by inquiring through the digital interface. The user should keep a record of these values in case they need to be restored ′... -
Page 69: Figure 8 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 70: 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 71 6331 Calibration Bath User’s Guide nificant change in the viscosity can indicate that the fluid is contaminated, being used outside of its temperature limits, contains ice particles, or is close to a chemical breakdown. Once data has been gathered, a specific maintenance schedule can be outlined for the instrument.
-
Page 72: Troubleshooting
13 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. 13.1 Troubleshooting In the event that the instrument appears to function abnormally, this section may help to find and solve the problem. - Page 73 6331 Calibration Bath User’s Guide Problem Causes and Solutions The display flashes “cutout” The problem may be that the controller’s voltmeter circuit is not func- and an incorrect process tioning properly. A problem could exist with the memory back-up bat- temperature tery.
-
Page 74: Comments
13 Troubleshooting Comments Problem Causes and Solutions The controller does not maintain Note: Before performing the memory check,you need to record the controller parameters or parame- controller calibration parameters (found in the CAL menu of the instru- ters are reset each time the ment) and any user-adjusted parameters that you have changed power to the unit is removed (such as the programmable set points and proportional band). -
Page 75: Emission Testing
6331 Calibration Bath User’s Guide the instrument may require the user to cycle the power to return to normal operation. 13.2.1.2 Emission Testing The instrument fulfills the limit requirements for Class A equipment but does not fulfill the limit requirements for Class B equipment. The instrument was not designed to be used in domestic establishment.