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Summary of Contents for Fluke Calibration 7103
- Page 1 7103 Micro-Bath User’s Guide December 2013 Rev. 1, 3/22 © 2013-2022 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
- Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.
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Page 3: Table Of Contents
Table of Contents Title Page Introduction....................1 Safety Information ..................2 Contact Fluke Calibration ................2 Service Information..................2 Specifications .................... 3 Bath Environment ................. 4 Bath Fluids (Summary) ................. 4 Unpack the Product ................4 Setup ......................5 Power....................5 Set the Temperature................ - Page 4 7103 User’s Guide Water (Distilled) ................15 Mineral Oil..................15 Silicone Oil (Dow Corning 200.05, 200.10, 200.20)......15 Fluid Characteristics Charts..............16 Limitations and Disclaimer ............... 17 About the Graph................18 Stirring ....................... 18 Fluid Drain ....................19 Temperature Controller ................19 Controller Operation ..................
- Page 5 Micro-Bath Table of Contents Compute DELTA................... 35 Compute R0 & ALPHA ................. 36 Accuracy and Repeatability ..............37 Stabilization and Accuracy ................ 37 Maintenance ....................37 Troubleshooting Problems, Possible Causes, and Solutions ....38...
- Page 6 7103 User’s Guide...
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Page 7: Introduction
Introduction The Fluke Calibration 7103 Micro-Bath (the Product, calibrator, or instrument) is a portable instrument/ bench-top temperature calibrator. Use the Product to calibrate thermocouple and RTD temperature probes. The Product 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), calibrate over a range of −30 °C to 125 °C (-22 °F to 257 °F). -
Page 8: Safety Information
+1-425-446-5500 info@flukecal.com Service Information Contact an authorized Fluke Calibration Service Center if the Product needs calibration or repair during the warranty period. Please have Product information such as the purchase date and serial number ready when you schedule a repair. -
Page 9: Specifications
Micro-Bath Specifications Specifications Table 1. Specifications -30 °C to 125 °C (22 °F to 257 °F) Range Accuracy ±0.25 °C ±0.03 °C at -25 °C (oil, 5010) Stability ±0.05 °C at 125 °C (oil, 5010) Uniformity ±0.02 °C 0.01 °C/°F Resolution Heating Time 25 °C to 100 °C (77 °F to 212 °F): 35 minutes... -
Page 10: Bath Environment
Bath Fluids (Summary) The Product does not come with fluid. Various fluids are available from Fluke Calibration and other sources. To safely operate the Product, only select bath fluids with adequate thermal properties that meet the application requirements. -
Page 11: Setup
Micro-Bath Setup Setup This section is a brief overview of the setup process. Product use is explained in greater detail in later sections. Caution To prevent Product damage: • Do not operate this instrument without fluid. • Make sure that the tank is 3/4 full before you set the temperature. To set up the Product: 1. -
Page 12: Set The Temperature
7103 User’s Guide Set the Temperature Temperature Set-point explains how to set the calibrator temperature set-point with the front panel keys. Briefly, the procedure is: 1. Push SET twice to access the set-point value. 2. Push UP or DOWN to change the set-point value. -
Page 13: Calibration Of Multiple Probes
Micro-Bath Parts and Controls W Warning To prevent possible fire, or personal injury: • Use care to prevent personal injury or damage to objects. The bath generates extreme temperatures. • Carefully place probes on a heat/cold resistant surface or rack until they are at room temperature. -
Page 14: Front Panel
7103 User’s Guide Figure 1. 7103 Back Panel Serial Port (A) – Use the DB-9 male connector to interface the calibrator to a computer or terminal with serial RS-232 communications. Power Switch (B) – The power switch is on the power entry module (PEM). The PEM also houses the fuses and the dual voltage selector (on applicable units). - Page 15 Micro-Bath Parts and Controls Figure 2. 7103 Front Panel 7103 MICRO-BATH –30°C to 125°C EXIT DOWN Controller Display (A) – The digital display not only displays set and actual temperatures but also displays various calibrator functions, settings, and constants. The display shows temperatures in units according to the selected scale °C or °F.
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Page 16: Accessories
7103 User’s Guide Accessories Transport/Pour Access Lid Use the provided transport/pour access lid (see Table 2) to keep the fluid in the bath when transporting. The lid doubles as a pour spout. Table 2. Bath Lids and Lid Parts Item... -
Page 17: Access Cover
Micro-Bath Parts and Controls Access Cover An aluminum access cover (see Table 2) is available for optimum stability. Drill holes in the access cover to insert the probes into the well. The holes must be within the guide ring for the probes to fit into the probe basket. -
Page 18: Stir Bar
Nevertheless, make sure to insert probes to the same depth in the bath liquid. Be sure that all probes are inserted deep enough to prevent stem effect. Fluke Calibration recommends a general rule for immersion depth to reduce the stem effect to a minimum: 15 x the diameter of the DUT + the sensor length. -
Page 19: General Operation
Among these are temperature range, viscosity, specific heat, thermal conductivity, thermal expansion, electrical resistivity, fluid lifetime, safety, and cost. Fluke Calibration recommends Silicone Oil Type 200.05. If the viscosity becomes too great, the stirrer may not function. -
Page 20: Temperature Range
7103 User’s Guide Temperature Range An important characteristic to consider is the temperature range of the fluid. Few fluids work well throughout the complete temperature range of the bath. The bath operating temperature must always be within the safe and useful temperature range of the fluid. The freeze point of the fluid or the temperature at which the viscosity becomes too great determines the lower temperature range of the fluid. -
Page 21: Cost
At lower temperatures, mineral oil is quite viscous, and control can be poor. At higher temperatures, vapor emission is significant. The vapors can be dangerous, and Fluke Calibration highly recommends a fume hood. As with most oils, mineral oil expands as temperature increases so do not fill the bath so full that it overflows when heated. -
Page 22: Fluid Characteristics Charts
7103 User’s Guide Fluid Characteristics Charts Table and Figure help to select a heat exchange fluid media for your constant temperature bath. These charts are a visual and numerical representation of most of the physical qualities that are important to remember when you select a fluid. The list is not all inclusive. There are other useful fluids not shown in this list. -
Page 23: Limitations And Disclaimer
Specifications may change and sources sometimes offer differing information. Fluke Calibration is not liable for any personal injury or damage to equipment, product, or facilities that result from the use of these fluids. The user of the bath is responsible and must collect correct information, exercise proper judgment, and ensure safe operation. -
Page 24: About The Graph
7103 User’s Guide About the Graph The fluid graph illustrates some of the important qualities of the fluids shown. Temperature Range: The temperature scale in the graph is in degrees Celsius. The fluids’ general range of application is indicated by the shaded bands. Qualities that include pour point, freeze point, important viscosity points, flash point, boiling point, and others may be shown. -
Page 25: Fluid Drain
Temperature Controller A Fluke Calibration unique hybrid digital/analog temperature controller controls the bath temperature. The controller offers the tight control stability of an analog temperature controller as well as the flexibility and programmability of a digital controller. -
Page 26: Well Temperature
7103 User’s Guide Well Temperature The display shows the actual well temperature. This temperature value is what is normally shown on the display. The temperature units are displayed at the right. For example, Well temperature in degrees Celsius 100.00C Push Exit to access the temperature display function from any other function. - Page 27 Micro-Bath Temperature Set-point Figure 6. Controller Operation Flowchart Display Switch Hold Display Mode Temperature DOWN DOWN Select Setpoint Displays of Rs Adjust Setpoint Toggles °C / °F EXIT EXIT Units °C/°F Secondary Functions EXIT Scan On/Off Menu EXIT Display Power Scan Rate Hard Cut-out Set Proportional Band...
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Page 28: Set-Point Value
7103 User’s Guide Set-point Value To adjust the set-point after you select the set-point memory: 1. Push SET. ° Set-point 4 value in 4 125. 2. If the set-point value is correct, hold EXIT to show the well temperature. 3. Push UP or DOWN to adjust the set-point value. -
Page 29: Temperature Display Hold
Micro-Bath Temperature Display Hold Temperature Display Hold The display hold function allows an external switch to freeze the displayed temperature and stop the scan of the set-point. Use this function to test thermal switches and cut-outs. The instrument must be powered off before you attach thermal switches or cut-outs. -
Page 30: Switch Test Example
7103 User’s Guide Switch Test Example This section describes a possible application for the temperature hold feature and how the instrument is set up and operated. For example, a thermal switch which is supposed to open at about 75 °C (167 °F) and close at about 50 °C (122 °F) and you want to test the switch to see how accurate and repeatable it is. -
Page 31: Proportional Band
Micro-Bath Proportional Band Access the heater power display in the secondary menu. Push SET and EXIT simultaneously and release. Heater power shows as a percentage of full power. Well temperature 100.00C Push SET and EXIT Access heater power in secondary menu Flashes Heater power in percent 12.0 P... -
Page 32: Controller Configuration
7103 User’s Guide Controller Configuration The controller has several configuration and operating options and calibration parameters which are programmable through the front panel. To access these, push SET from the secondary menu after the proportional band. Push SET again to enter the first of three sets of configuration parameters: operating parameters, serial interface parameters, and calibration parameters. -
Page 33: Serial Interface Parameters
Micro-Bath Controller Configuration Serial Interface Parameters The serial RS-232 interface parameters menu is indicated by, Serial RS-232 interface parameters menu SErIAL 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 34: Duplex Mode
7103 User’s Guide Duplex Mode The next parameter is the duplex mode. The duplex mode can be set to full duplex or half duplex. With full duplex, any commands received by the calibrator with the serial interface will be immediately echoed or transmitted back to the device of origin. -
Page 35: Hard Cut-Out
Micro-Bath Digital Communication Interface HARD Cut-out This parameter is the temperature above which the unit shuts down automatically. The parameter is set at the factory to approximately 140 °C and can be changed only through the variable resistor. This parameter cannot be changed through the instrument menu or the communications port This probe parameter refers to the resistance of the control probe at 0 °C. -
Page 36: Serial Communications
7103 User’s Guide Serial Communications The calibrator has an RS-232 serial interface that allows serial digital communications over fairly long distances. Use a serial interface to access any of the functions, parameters, and settings discussed in except for the BAUD rate setting. - Page 37 Micro-Bath Interface Commands Table 5. Controller Communications Commands Command Command Description Command Format Returned Returned Example Acceptable Values Example Display Temperature set: Read current set-point s[etpoint] set: 999.99 {C or F} 150.00 C Set current set-point to n s[etpoint]=n s=200.00 Instrument Range Read temperature t[emperature]...
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Page 38: Calibrate A Single Probe
7103 User’s Guide Table 5. Controller Communications Command (cont.) Command Command Description Command Format Returned Returned Example Acceptable Values Example Calibration Menu Read R0 calibration parameter r[0] r0: 999.999 r0: 100.578 Set R0 calibration parameter r[0]=n r=100.324 90 to 110... -
Page 39: Calibration
Micro-Bath Calibration Calibration Note Consider this procedure a general guideline. Each laboratory must 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 equipment and environment of the laboratory. You may want to calibrate the bath to improve the temperature set-point accuracy. -
Page 40: Calibration Procedure
7103 User’s Guide Calibration Procedure Note Consider this procedure a general guideline. Each laboratory must write their own procedure based on their equipment and their quality program. Accompany each procedure with an uncertainty analysis based on the laboratory equipment and environment. -
Page 41: Compute Delta
Micro-Bath Calibration Procedure Compute DELTA − A = T − B = T E = R − R F = R − R − delta − – Measured temperature using thermometer. 1 − 4 – Value of R from display of product (push SET and DOWN simultaneously.) 1 −... -
Page 42: Compute R0 & Alpha
7103 User’s Guide Compute R0 & ALPHA delta delta rzero alpha delta is the new value of DELTA computed above. Compute BETA delta rzero beta= (alpha)(x)(y ) x(y ) (alpha)(x)(y ) Where t and r are the measured temperature and resistance at –25 °C (–13 °F) and alpha, rzero, and delta are the new values of R0, ALPHA, and DELTA calculated above. -
Page 43: Accuracy And Repeatability
Micro-Bath Stabilization and Accuracy Accuracy and Repeatability Check the accuracy of the Product at various points over the calibrated range. If the Product does not pass specification at all set-points, repeat the Calibration Procedure. Stabilization and Accuracy The stabilization time of the bath depends on the conditions and temperatures involved. Typically, the test well will be stable to 0.1 °... -
Page 44: Troubleshooting Problems, Possible Causes, And Solutions
7103 User’s Guide Troubleshooting Problems, Possible Causes, and Solutions This section contains information on troubleshooting the Product. If the Product functions abnormally, this section may help to find and solve the problem. Several possible problem conditions are described along with likely causes and solutions. Please read this section carefully and attempt to understand and solve the problem. - Page 45 Micro-Bath Troubleshooting Problems, Possible Causes, and Solutions Problem Possible Causes and Solutions External switch is open. The external switch is open which causes the displayed temperature to o shows at the left of the display be frozen and keeps the set-point from scanning. Push DOWN to turn the switch test off.
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