Manuale d’uso / di manutenzione del prodotto 9140 del fabbricante Fluke
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9140 Dry-well Calibrator User’ s Guide Rev. 5B1702 Hart Scientific.
Rev. 5B1702 Fluke Corporation, Hart Scientific Division 799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA Phone: +1.801.763.1600 • Telefax: +1.801.763.1010 E-mail: support@hartscientific.com www.hartscientific.com Subject to change without notice.
T able of Contents 1 Bef ore Y ou Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.1 W ARNINGS .
7.2 T emperature Set-point . . . . . . . . . . . . . . . . . . . . . . . . 21 7.2.1 Programmable Set-points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7.2.2 Set-point V alue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Calibration Procedur e . . . . . . . . . . . . . . . . . . . . . . 43 10.1 Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . 43 10.2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 43 10.2.1 Compute DEL T A: .
iv Figures Figure 1 9140 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 2 9140 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 3 Inserts av ailable for the 9140 block assembly . . . . . .
v T ables T able 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1 T able 2 9140 controller communications commands . . . . . . . . . . . . . . . 36 T able 3 9140 controller communications commands continued . . . . . . . .
1 Bef ore Y ou Start 1.1 Symbols Used T able 1 lists the symbol s used on the instrument or i n this manual and the meaning of each symbol. Symbol Description AC ( Alternating Current) AC- DC Batter y.
Symbol Description Canadian Standards Associati on O VERV OL T AGE (Installat ion) CA TEGORY II, P ollution Deg ree 2 per IEC1010-1 re - f ers to the le vel of Impulse Wit hstand V oltage protect ion provided. Equipment of O VERV OL T AGE CA TEGOR Y II is energy-consuming equipment to be suppli ed from the fix ed installat ion.
ing power such as storage in a low humidity temperature chamber operat - ing at 50°C for 4 hours or more. • DO NO T use this instrument for any application other than calibration work. The instrument was designed for temperature calibration. Any other use of the instrument may cause unknown hazards to the user.
ELECTRICAL SHOCK • These guidelines must be followed to ensure that the safety mechanisms in this instrument will operate properly . This instrument must be plugged into a 115 V A C, 60Hz (230 V A C, 50Hz optional), AC only electric outlet.
• The instrument and any thermometer probes used with it are sensitive in - struments that can be easily damaged. Always handle these devices with care. DO NO T allo w them to be dropped, struck, stressed, or o v erheated. • The Factory Reset Sequence (see Section 12.
Science Park Eindhov en 5108 5692 EC Son NETHERLANDS Phone: +31-402-675300 T elefax: +31-402-675321 E-mail: ServiceDesk@fluke.nl Fluke Int'l Corporation Service Center - Instrimpex Room 2301 Sciteck T ower 22 Jianguomenwai Dajie Chao Y ang District Beijing 100004, PRC CHIN A Phone: +86-10-6-512-3436 T elefax: +86-10-6-512-3437 E-mail: xingye.
2 Intr oduction The Hart Scientif ic 9140 Mid-Range Field Cal ibrator may be used as a portable instrument or bench top temperat ure calibrator for calibrating t hermocouple and R TD temperature probes. The 9140 is small enough t o use in the f ield, and accurate enough to use in the lab .
3 Specifications and En vir onmental Conditions 3.1 Specifications The following table lists the specifications for this instru ment. Accuracy speci - fications are applicable for a one-year calibration interval.
operated in an e xcessi vel y dusty or dirty en vironment. Maintenance and clean - ing recommendations can be found in the M aintenance Section of this manual.
4 Quic k Start 4.1 Unpac king Unpack the dry-well carefully and inspect it for a ny damage that may ha ve oc - curred during shipment. If there i s shipping damage, notify the carrier immediately .
dry-well will t urn on and begin to heat to the pre viously programmed tempera - ture set-point. The front panel LED display will indi cate the actual dry-well temperature. 4.4 Setting the T emperature Section 7.2 explains in det ail ho w to set the temperat ure set-point on the cali - brator using the front panel ke y s.
5 P ar ts and Contr ols The user should become familiar with the d ry-well calibrator and its parts: 5.1 Rear P anel Figure 1 on page 13. Pow er Co rd - At the rear of the calibrato r is t he remov able power cord inlet that plugs into an IEC grounded socket .
around the two corners of the calibrator are pro vided for airflo w . The area around the calibrator must be kept clear to allow adequate ventilation. The air - flow is directed upw ard and as a result, can be e xtremely hot. 5.2 Fr ont P anel Figure 2 on page 14.
EXIT – Used to e xit a function and t o skip to the ne xt function. An y changes made to the displayed v alue are ignored. 5.3 Constant T emperature Block Assembly Figure 3 on page 15.
• Insert D (comparison block): 2 each at 3 mm, 4 mm, and 6 mm 9140 Dry-well Calibrator User’s Guide 16.
6 General Operation 6.1 Calibrator Set-Up Place the calibrator on a flat surface with at least 6 inches of free space around the instrument. Overhead clearance is required. DO NO T place under a cabinet or other structure.Plug the po wer cord into a grounded mai ns outlet.
• Using the same straight slot screwdri ver , move the heater switch to dis - play “230V”. See the rear panel drawing in Figure 1 on page 13. NO TE: If the heater switc h and the fuse holder do not both r ead 230V when complete, the unit will either not heat or only heat at a fraction of its capacity .
Using the same hole for the reference thermometer and the test probe may have better results. This ho wev er requires switching the probes which tak es more time. One must allo w a few minutes after inserti ng the probes for the tempera - ture to stabilize before making measurements.
7 Contr oller Operation This chapter discusses in detail how to operate the dry-well temperature con - troller using the front control panel. Using the front panel k ey-swit ches and LED display the u.
9140 Dry-well Calibrator User’s Guide 22 Figure 4 Controller Operation Flowchar t.
100.0 C W ell temperatur e in de gr ees Celsius S Access set-point memory 1. 100. Set-point memory 1, 100°C currently used T o change to another set-point memory press “UP” or “ DO WN”. 4. 300. New set-point memory 4, 300°C Press “SET” to accept the ne w selection and access the set-point value.
Un= F New units selected 7.3 Scan The scan rate can be set and enabl ed so that when the set-point is changed the dry-well heats or cools at a specified ra te (degrees per minute) until it reaches the ne w set-point. W ith the scan disabled the dry-well heats or cools at the maximum possible rate.
7.4 T emperature Display Hold The 9140 has a display hol d function which allo ws action of an external swi tch to freeze the displayed temperature and stop the set-point from scanning. This is useful for testing thermal swit ches and cutouts. This section e xplains the functions a vai lable for operating the temperature hol d feature.
sistor . The calib rator measures the volta ge at the red terminal and interprets +5V as open and 0V as closed. 7.4.4 Switch T est Example This section describes a p ossible application for the temperatu re hold feature and how t he instrument is set up and operated.
is. W ith good control stability the percent heating power should not fluctuate more than ± 1% within one minute. The heater power display is accessed i n the secondary menu. Press “SET” and “EXIT” simultaneously and release. The heater power will be displayed as a percentage of full po wer .
The temperature stability of the well and response time depend on the width of the proportional band. If the band is too wide the well temperat ure will de viate excessi vely from the set -point due to v arying external condit ions.
7.6 Contr oller Configuration The controller has a number of conf iguration and operati ng options and calibra - tion parameters which are programmable via the front panel. These are ac - cessed from the secondary menu after the proportional band funct ion by pressing “SET”.
7.6.1.2 ALPHA This probe parameter refers to the a verage sensit ivi ty of the probe between 0 and 100°C. The value of this parameter is set at the f actory for best instrument accuracy . 7.6.1.3 DEL T A This probe parameter characterizes the curvature of the resistance-temperatu re relationship of the sensor .
4800 b New baud rate Press “SET” to set the baud rate to the ne w va lue or “EXIT” to abort the opera - tion and skip to the next parameter in the menu. 7.8.1 Sample P eriod The sample period is the ne xt parameter in the serial interf ace parameter menu.
7.8.1.2 Linefeed The final parameter in the serial interface menu is the linefeed mode. This pa - rameter enables (on) or disables (of f) transmission of a linefeed character (LF , ASCII 10) after transmission of an y carri age-return.
8 Digital Comm unication Interface The dry-well calibrator is capable of communicating with and being controlled by other equipment through the digital serial interface. W ith a digital interface the instrument may be connected to a comput er or other equipment.
rial interf ace parameters menu are the B A UD rate, the sample rate, the duple x mode, and the linefeed parameter . 8.1.2.1 Baud Rate The baud rate is the first parameter in the menu. The display will prompt with the baud rate parameter by showing “ BAUd ”.
face commands are discussed in Section . All commands are ASCII character strings terminated with a carriage -return character (CR, ASCII 13). 8.2 Interface Commands The various commands for accessing the ca librator functions via the digital in - terfaces are listed in this section (see Ta b l e 2 ).
9140 Dry-well Calibrator User’s Guide 36 Command Description Command Format Command Example Returned Returned Example Acceptable Values Display Temperature Read current set-point s[etpoint] s set: 9999.99 {C or F} set: 150.00 C Set current set-point t o n s[etpoint]=n s=350 Instrument Range Read temperature t[emperature] t t: 9999.
37 8 Digital Communication Interface Interface Commands Command Description Command Format Command Example Returned Returned Example Acceptable Values Set serial linefeed mode: lf[eed]=on/of[f] ON or .
9 T est Pr obe Calibration For optimum accurac y and stability , allow the calibrator to warm up for 10 minutes after power -up and then allo w adequate stabilization time after reach - ing the set-point temperature.
2. Place the probe to be calibrated, the unit under test ( UUT), in another well. 3. W ith the reference inserted into one well and the probe under test in - serted into a second well, make measurements of each. 4. Swap the locations of the reference probe and probe under test.
W ARNING: DO NOT r emove inserts when heating or when the unit is hot. 9.2.3 Stabilization and Accuracy The stabilization time o f the dry-well calibrator w ill depend on the cond itions and temperatures inv olved. T ypically the test well will be stab le to 0.
timate stability will be achie ved 10 t o 20 minutes after reaching the set temperature. Inserting a cold probe in to a well will require another period of stabilizin g de - pending on the magnitude of the disturb ance and the required accuracy . For ex - ample, inserting a .
10 Calibration Pr ocedure Sometimes the user may want to calibrate the d ry-well to improv e the tempera - ture set-point accuracy . Calibration is done by adjusting the controller probe calibration c.
C TT TT = ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ − ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ − ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ − ⎡ ⎣ ⎢ ⎤ ⎦ 33 22 100 1 100 100 1 100 ⎥ D TT TT = ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ − ⎡ ⎣ ⎢ ⎤ .
b . Press SET then use the UP or DOWN keys until the correct numerical setting is displayed. Press SET to accept the new v alue. c. Repeat step b . for ALPHA and DEL T A. 10.2.3 Accuracy & Repeatability 1. Check the accuracy of the dry-well at v arious points ov er the calibration range.
11 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.
12 T r oubleshooting If problems arise while operati ng the 9140, this section provides s ome sugges - tions that may help you sol ve the problem. A wiri ng diagram is also i ncluded.
Problem Possible Causes and Solutions The display shows an error code Controller probl em. The error messages signif y the following pr oblems with the controller.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Fluke 9140 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Fluke 9140 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Fluke 9140 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Fluke 9140 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Fluke 9140, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Fluke 9140.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Fluke 9140. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Fluke 9140 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
