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Related Manuals for Fluke Micro-Bath 7102
Summary of Contents for Fluke Micro-Bath 7102
- Page 1 7102 Micro-Bath User’s Guide Revision 830501-EN...
- Page 2 Limited Warranty & Limitation of Liability Each product from Fluke’s Hart Scientific Division (“Hart”) is warranted to be free from defects in mate rial and workmanship under normal use and service. The warranty period is one year for the Micro-Bath. The warranty period begins on the date of the shipment.
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Page 3: Table Of Contents
Table of Contents Before You Start ...............1 Symbols Used ................... 1 Safety Information ..................2 1.2.1 Warnings ....................2 1.2.2 Cautions ....................4 Authorized Service Centers ..............5 Introduction ................7 Specifications and Environmental Conditions ......9 Specifications ................... 9 Environmental Conditions ................. 9 Quick Start ................ - Page 4 7.3.2 Access Cover (Optional) ................19 7.3.3 Probe Basket ....................20 7.3.4 Stir Bar ......................20 7.3.5 Well Extender (Optional) ................20 General Operation ..............21 Changing Display Units ................21 Switching to 230V Operation ..............21 Bath Fluid ....................21 8.3.1 Temperature Range ..................21 8.3.2 Viscosity ......................22 8.3.3...
- Page 5 Temperature Display Hold ..............35 9.4.1 Hold Temperature Display ................35 9.4.2 Mode Setting ....................35 9.4.3 Switch Wiring ....................36 9.4.4 Switch Test Example ..................36 Secondary Menu ..................36 Thermal Electric Device (TED) ............... 37 Proportional Band .................. 37 Controller Configuration ................38 9.8.1 Operating Parameters ...................38 9.8.1.1...
- Page 6 12.1 Calibration Points ................... 49 12.2 Calibration Procedure ................49 12.2.1 Compute DELTA ...................50 12.2.2 Compute R0 & ALPHA ..................50 12.2.3 Accuracy & Repeatability ................51 13 Maintenance ................53 14 Troubleshooting ..............55 14.1 Troubleshooting Problems, Possible Causes, and Solutions ....55 14.2 Comments ....................
- Page 7 Tables Table 1 International Electrical Symbols ............1 Table 2 Specifications ..................9 Table 3 Table of Various Bath Fluids ............... 25 Table 4 Nominal Stirrer Motor Settings With Different Liquids ......27 Table 5 Controller Communications Commands ..........46...
- Page 8 Figures Figure 1 7102 Front Panel ................17 Figure 2 7102 Back Panel and Bottom ............18 Figure 3 Bath Lids and Lid Parts ..............19 Figure 4 Probe Basket ..................20 Figure 5 Stir Bar ....................20 Figure 6 Chart of Various Bath Fluids ............. 26 Figure 7 Controller Operation Flowchart ............
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Page 9: Before You Start
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 Battery... -
Page 10: Safety Information
7102 Micro-Bath User’s Guide Safety Information Symbol Description 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. Examples include household, office, and laboratory appliances. - Page 11 Before You Start Safety Information 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.
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Page 12: Cautions
7102 Micro-Bath User’s Guide Safety Information 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 haz ards. -
Page 13: 1.3 Authorized Service Centers
Otherwise, the fluid may overflow the well and leak into the instrument. 1.3 Authorized Service Centers Please contact one of the following authorized Service Centers to coordinate service on your Hart product: Fluke Corporation Hart Scientific Division... - Page 14 7102 Micro-Bath User’s Guide Authorized Service Centers Fluke Nederland B.V. Fluke Int’l Corporation Fluke South East Asia Pte Ltd. When contacting these Service Centers for support, please have the following information available: Model Number ● Serial Number ● Voltage ●...
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Page 15: Introduction
Introduction Introduction The Hart Scientific 7102 Micro-Bath may be used as a portable instrument or bench top temperature calibrator for calibrating thermocouple and RTD temper ature 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). -
Page 17: Specifications And Environmental Conditions
Specifications and Environmental Conditions Specifications 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... -
Page 19: Quick Start
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. 4.1 Unpacking Unpack the Micro-Bath carefully and inspect it for any damage that may have occurred during shipment. -
Page 20: Power
7102 Micro-Bath User’s Guide Power Turn on the power to the calibrator by toggling the switch on the power entry module. The fan should begin blowing air through the instrument and the con troller display should illuminate after 3 seconds. After a brief self test the con troller should begin normal operation. -
Page 21: Installation
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 war ranty. Bath Environment The 7102 Micro Bath is a precision instrument which should be located in an appropriate environment. -
Page 22: Power
7102 Micro-Bath User’s Guide Power Note: 200.05 Silicon Oil expands 2.54 cm (1 inch) for a 100°C increase in temperature. Power With the bath power switch off, plug the bath into an AC mains outlet of the appropriate voltage, frequency, and current capacity. Refer to Section 3.1, Specifications, for power details. -
Page 23: Bath Use
Bath Use General 6 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. -
Page 24: Calibration Of Multiple Probes
7102 Micro-Bath User’s Guide Calibration of Multiple Probes 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
Parts and Controls Front Panel Parts and Controls The user should become familiar with the bath and its parts: Front Panel Figure 1 on this page. 7102 MICRO-BATH –5°C to 125°C DOWN EXIT Figure 1 7102 Front Panel Controller Display – The digital display is an important part of the temperature controller because it not only displays set and actual temperatures but also dis plays various calibrator functions, settings, and constants. -
Page 26: Figure 2 7102 Back Panel And Bottom
7102 Micro-Bath User’s Guide Back Panel DISPLAY HOLD FLUKE CORPORATION HART SCIENTIFIC DIVISION www.hartscientific.com POWER 115 VAC / 3 A 230 VAC / 1.6 A 50/60 Hz 115 V - 3 250 V 230 V - 1.6 A T 250 V... -
Page 27: Accessories
Parts and Controls Accessories Accessories 7.3.1 Transport/Pour Access Lid A transport/pour access lid (Figure 3) is provided so the fluid being used does not have to be removed when transporting. The lid doubles as a pour spout. Pour Spout Pour Spout Cover Transport Plug... -
Page 28: Probe Basket
7102 Micro-Bath User’s Guide Accessories 7.3.3 Probe Basket A probe basket (Figure 4) is provided as a guide for the probes and to prevent bumping of the stir bar. Figure 4 Probe Basket 7.3.4 Stir Bar The stir bar (Figure 5) sits in the bottom of the well for mixing the fluid provid ing better accuracy, uniformity, and stability. -
Page 29: General Operation
General Operation Changing Display Units General Operation Changing Display Units The 7102 can display temperature in Celsius or Fahrenheit. The temperature units are shipped from the factory set to Celsius. To change to Fahrenheit or back to Celsius there are two ways: Press “SET”... -
Page 30: Viscosity
7102 Micro-Bath User’s Guide Bath Fluid flammability, or chemical breakdown of the fluid. Vaporization of the fluid at higher temperatures may affect temperature stability because of cool condensed fluid dripping into the bath from the lid. 8.3.2 Viscosity Viscosity is a measure of the thickness of a fluid, how easily it can be poured and mixed. -
Page 31: Fluid Lifetime
General Operation Bath Fluid 8.3.7 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, substantially reducing the fluid’s lifetime. 8.3.8 Safety When choosing a fluid always consider the safety issues associated. -
Page 32: Water (Distilled)
7102 Micro-Bath User’s Guide Bath Fluid 8.3.10.1 Water (Distilled) Water is often used because of its very low cost, availability, and excellent tem perature control characteristics. Water has very low viscosity and good thermal conductivity and heat capacity which makes it among the best fluids for control stability at low temperatures. -
Page 33: Limitations And Disclaimer
General Operation Bath Fluid 8.3.11.1 Limitations and Disclaimer The information given in this manual regarding fluids is intended only to be used as a general guide in choosing a fluid. Though every effort has been made to provide correct information we cannot guarantee accuracy of data or assure suitability of a fluid for a particular application. -
Page 34: About The Graph
7102 Micro-Bath User’s Guide Bath Fluid Figure 6 Chart of Various Bath Fluids 8.3.11.2 About the Graph The fluid graph visually illustrates some of the important qualities of the fluids shown. Temperature Range: The temperature scale is shown in degrees Celsius. The fluids’ general range of application is indicated by the shaded bands. -
Page 35: Stirring
General Operation Stirring Pour Point: This represents a handling limit for the fluid. Viscosity: Points shown are at 50 and 10 centistokes viscosity. When viscosity is greater than 50 centistokes stirring is very poor and the fluid is unsatisfactory for bath applications. -
Page 36: Power
7102 Micro-Bath User’s Guide Power Power Power to the bath is provided by an AC mains supply and passes through a fil ter to prevent switching spikes from being transmitted to other equipment. Re fer to Section 3.1, Specifications, for power details. To turn on the bath, switch the control panel power switch to the ON position. - Page 37 General Operation Temperature Controller When the controller is set to a new set-point the bath heats or cools to the new temperature. Once the new temperature is reached the bath usually takes 15 – 20 minutes for the temperature to settle and stabilize. There may be a small over shoot or undershoot.
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Page 39: Controller Operation
Controller Operation Well Temperature 9 Controller Operation This chapter 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 well temperature, set the temperature set-point in degrees C or F, monitor the heater output power, adjust the controller propor tional band, and program the calibration parameters, operating parameters, and serial interface configuration. -
Page 40: Figure 7 Controller Operation Flowchart
7102 Micro-Bath User’s Guide Temperature Set-point Displ ay Te mperatur e Switch Hold Displa y Mode DO WN DO WN Select Setpoint Toggles Displa y of Rs Adjust Setpoint Toggles °C / °F EXIT EXIT Units °C/°F Secondar y Functions Ca l EXIT Scan On/Off... -
Page 41: Set-Point Value
Controller Operation Temperature Set-point Well temperature in degrees Celsius 100.00C Access set-point memory Set-point memory 1, 25°C currently used 1. 25 To change the set-point memory press “UP” or “DOWN”. New set-point memory 4, 125°C 4. 125. Press “SET” to accept the new selection and access the set-point value. Accept selected set-point memory 9.2.2 Set-point Value... -
Page 42: Scan
7102 Micro-Bath User’s Guide Scan New units selected Un= F Scan The scan rate can be set and enabled so that when the set-point is changed the bath heats or cools at a specified rate (degrees per minute) until it reaches the new set-point. With the scan disabled the bath heats or cools at the maximum possible rate. -
Page 43: Temperature Display Hold
Controller Operation Temperature Display Hold Temperature Display Hold The 7102 has a display hold function which allows action of an external switch to freeze the displayed temperature and stop the set-point from scanning. This is useful for testing thermal switches and cut-outs. The instrument must be powered off before attaching thermal switches or cut-outs. -
Page 44: Switch Wiring
7102 Micro-Bath User’s Guide Secondary Menu 9.4.3 Switch Wiring The thermal switch or cut-out is wired to the calibrator at the two terminals on the back of the Micro-Bath labeled “DISPLAY HOLD”. The switch wires may be connected to the terminals either way. Internally the black terminal connects to ground. -
Page 45: Thermal Electric Device (Ted)
Controller Operation Thermal Electric Device (TED) Thermal Electric Device (TED) The temperature controller controls the temperature of the well by pulsing the TED on and off. The total power being applied to the TED is determined by the duty cycle or the ratio of TED on time to the pulse cycle time. -
Page 46: Controller Configuration
7102 Micro-Bath User’s Guide Controller Configuration The proportional band width is set at the factory to about 5.0°C. The propor tional band width may be altered by the user if he desires to optimize the con trol characteristics for a particular application. The proportional band width is easily adjusted from the front panel. -
Page 47: High Limit
Controller Operation Controller Configuration The operating parameters menu contains the High Limit and Stir Speed parameters. 9.8.1.1 High Limit The High Limit Parameter adjusts the upper set-point temperature. The factory default and maximum temperature are set to 126°C. For safety, a user can ad just the HL down so the maximum temperature set-point is restricted. -
Page 48: Baud Rate
7102 Micro-Bath User’s Guide Controller Configuration The serial interface parameters menu contains parameters which determine the operation of the serial interface. These controls only apply to instruments fitted with the serial interface. The parameters in the menu are — baud rate, sample period, duplex mode, and linefeed. -
Page 49: Duplex Mode
Controller Operation Controller Configuration 9.8.2.3 Duplex Mode The next parameter is the duplex mode. The duplex mode may be set to full du plex or half duplex. With full duplex any commands received by the calibrator via the serial interface will be immediately echoed or transmitted back to the device of origin. With half duplex the commands will be executed but not ech oed. -
Page 50: Alpha
7102 Micro-Bath User’s Guide Controller Configuration The calibration parameters menu is indicated by: Calibration parameters menu Press “SET” five times to enter the menu. The calibration parameters R0, ALPHA, DELTA, C0, CG, and rCAL characterize the resistance-temperature relationship of the platinum control sensor. These pa rameters may be adjusted by an experienced user to improve the accuracy of the calibrator. -
Page 51: 10 Digital Communication Interface
Digital Communication Interface Serial Communications 10 Digital Communication Interface The Micro-Bath calibrator is capable of communicating with and being con trolled by other equipment through the digital serial interface. With a digital interface the instrument may be connected to a computer or other equipment. -
Page 52: Baud Rate
7102 Micro-Bath User’s Guide Serial Communications interface parameters menu are the baud rate, the sample rate, the duplex mode, and the linefeed parameter. 10.1.2.1 Baud Rate The baud rate is the first parameter in the menu. The display will prompt with the baud rate parameter by showing “bAUd”. -
Page 53: 10.2 Interface Commands
Digital Communication Interface Interface Commands 10.2 Interface Commands The various commands for accessing the calibrator functions via the digital in terfaces are listed in this section (see Table 5). These commands are used with the RS-232 serial interface. The commands are terminated with a carriage-re turn character. The interface makes no distinction between upper and lower case letters, hence either may be used. -
Page 54: Table 5 Controller Communications Commands
7102 Micro-Bath User’s Guide Interface Commands Table 5 Controller Communications Commands Command Description Command Format Command Example Returned Returned Example Acceptable Values Display Temperature Read current set-point s[etpoint] set: 999.99 {C or F} set: 150.00 C Set current set-point to n s[etpoint]=n s=200.00 Instrument Range... -
Page 55: Test Probe Calibration
Test Probe Calibration Calibrating a Single Probe Test Probe Calibration Note: This procedure is to be considered a general guideline. Each laboratory should write their own procedure based on their equipment and their quality program. Each procedure should be accompanied by an uncertainty analysis also based on the laboratory’s equipment and environment. -
Page 57: 12 Calibration Procedure
Calibration Procedure Calibration Points 12 Calibration Procedure Note: This procedure is to be considered a general guideline. Each laboratory should write their own procedure based on their equipment and their quality program. Each procedure should be accompanied by an uncertainty analysis also based on the laboratory’s equipment and environment. -
Page 58: Compute Delta
7102 Micro-Bath User’s Guide Calibration Procedure 12.2.1 Compute DELTA − − − − − ... -
Page 59: Accuracy & Repeatability
Calibration Procedure Calibration Procedure “CAL” is displayed. Press “SET” five times until “ R0” is displayed. Press “SET” then use the “UP” or “DOWN” keys until the correct nu merical setting is displayed. Press “SET” to accept the new value. Repeat step 2 for ALPHA and DELTA. -
Page 61: Maintenance
Maintenance Maintenance The calibration instrument has been designed with the utmost care. Ease of ● operation 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 an oily, wet, dirty, or dusty environment. -
Page 63: Troubleshooting
Troubleshooting Troubleshooting Problems, Possible Causes, and Solutions Troubleshooting This section contains information on troubleshooting and CE Comments. 14.1 Troubleshooting Problems, Possible Causes, and Solutions In the event that the instrument 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. -
Page 64: Comments
7102 Micro-Bath User’s Guide Comments Problem Possible Causes and Solutions AC voltage present on Use a wall plug tester to check the main power plug at the wall. Use an ohmmeter to the chassis check the continuity between the ground prong on the PEM and the chassis. If the resistance reading is greater than three ohms, there is a problem.