Fluke 9140 Dry-well Calibrator Manual de usuario

9140Dry-well CalibratorUser’ s GuideRev. 5B1702Hart Scientific

ing power such as storage in a low humidity temperature chamber operat-ing at 50°C for 4 hours or more.•DO NOT use this instrument for any application

ELECTRICAL SHOCK•These guidelines must be followed to ensure that the safety mechanismsin this instrument will operate properly. This instrument must

•The instrument and any thermometer probes used with it are sensitive in-struments that can be easily damaged. Always handle these devices withcare. D

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2 IntroductionThe Hart Scientific 9140 Mid-Range Field Calibrator may be used as a portableinstrument or bench top temperature calibrator for calibrat

3 Specifications and EnvironmentalConditions3.1 SpecificationsThe following table lists the specifications for this instrument. Accuracy speci-ficatio

operated in an excessively dusty or dirty environment. Maintenance and clean-ing recommendations can be found in the Maintenance Section of this manua

4 Quick Start4.1 UnpackingUnpack the dry-well carefully and inspect it for any damage that may have oc-curred during shipment. If there is shipping da

dry-well will turn on and begin to heat to the previously programmed tempera-ture set-point. The front panel LED display will indicate the actual dry-

5 Parts and ControlsThe user should become familiar with the dry-well calibrator and its parts:5.1 Rear PanelFigure 1 on page 13.Power Cord - At the r

Rev. 5B1702Fluke Corporation, Hart Scientific Division799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USAPhone: +1.801.763.1600 • Telefax: +

around the two corners of the calibrator are provided for airflow. The areaaround the calibrator must be kept clear to allow adequate ventilation. The

EXIT – Used to exit a function and to skip to the next function. Any changesmade to the displayed value are ignored.5.3 Constant Temperature Block Ass

•Insert D (comparison block): 2 each at 3 mm, 4 mm, and 6 mm9140 Dry-well CalibratorUser’s Guide16

6 General Operation6.1 Calibrator Set-UpPlace the calibrator on a flat surface with at least 6 inches of free space aroundthe instrument. Overhead cle

•Using the same straight slot screwdriver, move the heater switch to dis-play “230V”. See the rear panel drawing in Figure 1 on page 13.NOTE: If the h

Using the same hole for the reference thermometer and the test probe may havebetter results. This however requires switching the probes which takes mo

7 Controller OperationThis chapter discusses in detail how to operate the dry-well temperature con-troller using the front control panel. Using the fr

9140 Dry-well CalibratorUser’s Guide22Figure 4 Controller Operation Flowchart

100.0 CWell temperature in degrees CelsiusSAccess set-point memory1. 100.Set-point memory 1, 100°C currently usedTo change to another set-point memory

Un= F New units selected7.3 ScanThe scan rate can be set and enabled so that when the set-point is changed thedry-well heats or cools at a specified r

Table of Contents1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Symbols Used . . . . . . .

7.4 Temperature Display HoldThe 9140 has a display hold function which allows action of an external switchto freeze the displayed temperature and stop

sistor. The calibrator measures the voltage at the red terminal and interprets+5V as open and 0V as closed.7.4.4 Switch Test ExampleThis section descr

is. With good control stability the percent heating power should not fluctuatemore than ±1% within one minute.The heater power display is accessed in

The temperature stability of the well and response time depend on the width ofthe proportional band. If the band is too wide the well temperature will

7.6 Controller ConfigurationThe controller has a number of configuration and operating options and calibra-tion parameters which are programmable via

7.6.1.2 ALPHAThis probe parameter refers to the average sensitivity of the probe between 0and 100°C. The value of this parameter is set at the factory

4800 bNew baud ratePress “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.7.8.

7.8.1.2 LinefeedThe final parameter in the serial interface menu is the linefeed mode. This pa-rameter enables (on) or disables (off) transmission of

8 Digital Communication InterfaceThe dry-well calibrator is capable of communicating with and being controlledby other equipment through the digital s

rial interface parameters menu are the BAUD rate, the sample rate, the duplexmode, and the linefeed parameter.8.1.2.1 Baud RateThe baud rate is the fi

7.2 Temperature Set-point . . . . . . . . . . . . . . . . . . . . . . . . 217.2.1 Programmable Set-points . . . . . . .

face commands are discussed in Section. All commands are ASCII characterstrings terminated with a carriage-return character (CR, ASCII 13).8.2 Interfa

9140 Dry-well CalibratorUser’s Guide36Command DescriptionCommandFormatCommandExample ReturnedReturnedExampleAcceptableValuesDisplay TemperatureRead cu

378 Digital Communication InterfaceInterface CommandsCommand DescriptionCommandFormatCommandExample ReturnedReturnedExampleAcceptableValuesSet serial

9 Test Probe CalibrationFor optimum accuracy and stability, allow the calibrator to warm up for 10minutes after power-up and then allow adequate stabi

2. Place the probe to be calibrated, the unit under test (UUT), in anotherwell.3. With the reference inserted into one well and the probe under test i

WARNING: DO NOT remove inserts when heating or when the unit ishot.9.2.3 Stabilization and AccuracyThe stabilization time of the dry-well calibrator w

timate stability will be achieved 10 to 20 minutes after reaching the settemperature.Inserting a cold probe into a well will require another period of

10 Calibration ProcedureSometimes the user may want to calibrate the dry-well to improve the tempera-ture set-point accuracy. Calibration is done by a

CTTTT=⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦33221001100 1001100⎥DTTTT=⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦⎥−⎡⎣⎢⎤⎦22111001100 1001100⎥ERR=−32FRR=−21deltaAF BEDE CF=−−T1-3- Measured

b. Press SET then use the UP or DOWN keys until the correct numericalsetting is displayed. Press SET to accept the new value.c. Repeat step b. for ALP

10 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 4310.1 Calibration Points . . . . . . . . . . . .

11 Maintenance•The calibration instrument has been designed with the utmost care. Easeof operation and simplicity of maintenance have been a central t

12 TroubleshootingIf problems arise while operating the 9140, this section provides some sugges-tions that may help you solve the problem. A wiring di

Problem Possible Causes and SolutionsThe display showsan error codeController problem. The error messages signify the following problems with thecontr

ivFiguresFigure 1 9140 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 2 9140 Front Panel .

vTablesTable 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1Table 2 9140 controller communications

1 Before You Start1.1 Symbols UsedTable 1 lists the symbols used on the instrument or in this manual and themeaning of each symbol.Symbol DescriptionA

Symbol DescriptionCanadian Standards AssociationOVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re-fers to the level of Impul