Fluke 1504 инструкция обслуживания

1504 Thermometer Readout User’ s Guide Rev. 571202 ENG Hart Scientific[...]

Limited W arranty & Limitation of Liability Each product from Fluke's Hart Scientific Di vision ("Hart") is warranted to be free from defects in mate - rial and workmanship under normal use and service. The warranty period is three years for the Thermom - eter Readout. The warranty period begins on the date of the shipment. Parts[...]

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.2 Cautio[...]

7.1 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.1.1 Setting the Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.1.2 Automatic T ransmission of Measurements . . . . . . . . . . . . . . . . . . . 26 7.1.3 T ime Stamp and System Clock . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.1.4 [...]

iii Figures Figure 1 Connecting a four-wire probe . . . . . . . . . . . . . . . . . . . . . . 12 Figure 2 12 V DC power source polarity . . . . . . . . . . . . . . . . . . . . . 13 Figure 3 1504 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 4 1504 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

iv T ables T able1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1 T able 2 T ypical V alues for Thermistor Coefficients . . . . . . . . . . . . . . . 20 T able 3 Setting Coef ficients a, b, and c . . . . . . . . . . . . . . . . . . . . . . 21 T able 4 Setting Coef ficients a, b, c, and d . . . . . . . . . . . . . . . .[...]

1 Bef ore Y ou Start 1.1 Symbols Used T able 1 lists the symbol s that may be used on the i nstrument or in this m anual and the meaning of each symbol. Symbol Description AC ( Alternating Current) AC- D C Batter y Complies with European Uni on Directiv es DC (Direct Current ) Double Insulated Electric Shock Fuse PE Ground Hot Surf ace (Bur n Hazar[...]

Symbol Description On Canadian Standards Associati on O VERV OL T AGE (Installat ion) CA TEGORY II , P ollution Degree 2 per IEC1010-1 r e - f ers to the le vel of Impulse Wit hstand V oltage protection provided. Equipment of O VERV OL T AGE CA TEGOR Y II is energy-consuming equipment to be suppl ied from the fix ed install ation. Examples include [...]

Before initial use, or after transport, or after s torage in humid or semi-hu mid en vironments, or anytime the instrument has not been ener gized for more than 10 days, the instrument needs to be energi zed for a “dry-out” period of 2 hours before it can be assumed to meet all of the safety requirements of the IEC 1010-1. If the product is wet[...]

1.2.2 Cautions T o av oid possible damage to the instrument, follow these guidelines. DO NO T change the values of the calibration constant s from the factory set values unless you are recalibrating the instru ment. The correct setting o f these parameters is import ant to the safety a nd proper operation of the instrument. Allow suf ficient air ci[...]

Phone: +1.801.763.1600 T elefax: +1.801.763.1010 E-mail: support@hartscientific.com Fluke Nederland B.V . Customer Support Services 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 Jian[...]

When contacting these Service Cente rs for support, please hav e the following information av ailable: • Model Number • Serial Number • V oltage • Complete description of the problem 1504 Thermometer Readout User’s Guide 6[...]

2 Intr oduction The 1504 Thermometer Readout is a low-c ost high-accuracy digital thermome - ter readout designed to be used with t hermistors or R TDs with a nominal resis - tance of 1,000 Ω or greater . Its unique combination of features makes it s uitable for a wide v ariety of appli cations from laboratory measurement to industrial processes. [...]

3 Specifications and En vir onmental Conditions 3.1 Specifications Resistance range 0t o1M Ω , auto-ranging Resistance accuracy, one year 1 0t o5k Ω :0 . 5 Ω 5k Ω to 200 k Ω : 0.01% (100 ppm) of reading 200 k Ω t o1M Ω : 0.03% (300 ppm) of reading Resistance accuracy, short term 1 0t o5k Ω :0 . 2 5 Ω 5k Ω to 200 k Ω : 0.005% (50 ppm) of [...]

Communications RS-232 serial st andard, IEEE-488 (GPIB) optional, Conforms to IEEE- 488.1, Capability: AH1, SH1, T6, L4, DC1 Operating Temperatur e Range Full accuracy: 13°C to 33°C Absolute : 0°C to 5 5°C AC Power 115 VAC (±10%), 50/60 Hz, 10 W, nominal 1 A maximum 230 VAC (±10%), 50/60 Hz, 10 W ( optional) Detachable power cord DC Power (op[...]

4 Quic k Start This section briefly explains the basics of setting up and operating your 1504 thermometer readout. 4.1 Unpac king Unpack the thermometer carefully and i nspect it for any damage that may ha ve occurred during shipment. If there i s shipping damage, notify t he carrier immediately . V erify that the follo wing components are present:[...]

to pins 4 and 5. (Pins 1 and 5 source current and pins 2 and 4 sense the poten - tial.) If a shie ld wire is present i t should be connected t o pin 3. A two-wire probe can al so be used with the 1504. It i s connected by attaching one wire to both pi ns 1 and 2 of the plug and the ot her wire to both pi ns 4 and 5. If a shield wire is present it s[...]

ductor is positi ve and the inside is neg ati ve. When operating in DC mode, the A C power switch on the rear panel is not functional. The optional 9313 Bat tery Pack, av ailable from Hart Scientif ic, can be used as a portable po wer source for the 1504. It includes a 1.2 amp-hr 12V sealed lead-acid battery , a DC power cord that plugs into the 15[...]

NO TE: The DC power option includes a low voltage indicator . The low voltage indicator needs to be plugged into the instrument with the battery option plugged in to the low voltage indicator . The low voltage indicator light illuminates when the voltage dr ops below a safe operating range . The instrument should not be used for measuring when the [...]

5 P ar ts and Controls 5.1 Fr ont P anel Buttons See Figure 3. The front panel buttons are used to select units of measurement, access operat - ing parameters, and alter operating parameters. The function of each button is as follows: C/Probe —This button selects units of degrees Celsius. In conjun ction with the Menu button, it selects the probe[...]

5.2 Rear P anel See Figure 4 . Serial Port - The DB-9 connector i s for interfaci ng the thermometer to a com - puter or terminal with serial RS-232 communications. Probe Connector - At the rear of the thermometer is t he probe connector . The probe must be connected for operation. Po wer Switch - The po wer switch is locat ed on the rear of the th[...]

6 General Operation This section e xplains basic operat ion of the 1504 Thermometer . 6.1 Selecting Units T emperature can be displayed in degrees Celsius (indicated with “ C ”), degrees Fahrenheit (indicated with “ F ”), or Kelvin (indicated with “ A ” for absolute). The resistance of the sensor can al so be displayed (indicated wi th [...]

1504 Thermometer Readout User’s Guide 18 Menu Sample Comm (Cal) Probe Set clock Set filter Set probe type Enter password Set time stamp Set coefficients Set menu lockout Set baud rate Set power saver Set CAL0 Set sample period T est conversion Set CAL 100 Set duplex Set CAL 400 Set linefeed Factory reset Set GPIB address Set GPIB EOS 11.23.30 FI=[...]

when all the digits are correct. If the pa ssw ord is entered correctly the f irst pa - rameter in the menu will appear . 6.4 Selecting the Probe Characterization Before the 1504 can measure temperature accurately it must know ho w to cal - culate temperature from the resistance of the sensor . Y ou must enter the proper characterization coefficien[...]

E -04 Increase or decrease the exponent using the U and D buttons . Once the e x - ponent is correct, press Enter to stor e it. 6.4.3 Steinhart-Har t Characterization Thermistors are most oft en characterized using the Stei nhart-Hart equation: r T K e x p B B TB TB T o ([ ] ) [ ] [ ] Ω= + + + −−− 1 1 2 2 3 3 This is the defaul t probe type.[...]

b=4.6354171E03, c=-1.2531030E05, and d=-6.2365913E06. Set the 1504 pa - rameters with values from the certificate as follo ws. Example 2: A thermistor’ s calibration certif icate gi ves coef ficients a=-4.2501569E00, b=3.8997001E03, and c=-1.4225654E07. Set t he 1504 parameters with v alues from the certificate as follows. 6.4.4 Callendar -V an D[...]

[] () () () [] rt C RA t B RA t B t C t t t t °= ++ ++ + − ≥ < ⎧ ⎨ ⎩ ⎪ 0 2 0 23 1 1 100 0 0 The A, B, and C coef ficients can be con verted t o α, δ ,a n d β coef fi cients using the following formulas: αδ β =+ = − + =− + AB A B C AB 100 100 100 1 10 100 8 6.4.5 T esting the coefficients The 1504 provides a con venient met[...]

play as an indication that the 1504 is still operating. Pressing any b utton on the front panel restores the display . Y ou can program the power sav er to activ ate af - ter a specif ied period of time from 5 minutes to 60 minutes i n interv als of 5 minutes. Y ou can also disable the power sa ver feature completel y . The power sav er is of f by [...]

7 Digital Comm unications Interface Remote communications allows an e x ternal de vice, such as a computer , to com - municate with the 1504 to obtain measurement data and cont rol its operation. Communication is accomplished with v arious commands issued to the 1504 through the RS-232 port or optional IEEE-488 port. A full list of commands is gi v[...]

7.1.2 A utomatic T ransmission of Measurements The 1504 can be programmed to automati cally send measurements to a remote printer or terminal. The transmission interval is set using th e “ SA PEr ”s a m p l e period parameter . This is set in the Comm menu after the baud rate paramete r . The display will br iefly indicate “ SA PEr ” and th[...]

to the time stamp parameter . The display will br iefly show “ ti Sta ” then the time stamp state which is either ON or OFF . Use the U and D buttons to change the state and press Enter . ON enables transmission o f the time stamp and OFF disables it. The time stamp can also be set using the “ST” communications command. The command ST=ON<[...]

7.2.1 Setting the Address The IEEE-488 bus requires that each de vi ce has a unique address. The default address of the 1504 is 22 b ut can be changed if necessary . The IEEE-488 ad - dress of the 1504 is set within the Comm menu after the serial linefeed param - eter . (This menu option will not appear if the IEEE-488 interface is not installed). [...]

29 7 Digital Communications Interface Remote Commands Command Description Measurement Commands T read measurement (includes label, unit , and time) F[ETCH?] read measurement value (SCPI compatible) SA[=[[[hh:] mm:]ss] read [or set] serial sample period U=C|F|K|O select units ST[=ON/OF] read [or set] t he time stamp CL[=hh:mm:ss] read [or set] the s[...]

7.3.1.1 Reading T emperature The most recent temperature measurement can be read using the following command: T<EOS> reads the most recent measurement The syntax of the response is as follo ws: t:_nnnn.nnn_u or t:_nnnn.nnn_u_hh:mm:ss The _’ s represent space characters. The n ’ s represent the digit s of the measure- ment value. If fe wer[...]

SA=5:00<EOS> sets the sample period to 5 minutes SA=1:00:00<EOS> sets the sample period to 1 hour 7.3.1.3 Selecting the Unit of Measurement The selected unit i s used in displaying measurements on the front panel and in reading measurements from the comm unications interfaces. The following commands can be used to select the unit of mea[...]

B n =<v alue><EOS> sets b 0 , b 1 , b 2 , or b 3 for the thermistor characterization. n is a number from 0 to 3. 7.3.2.2 T esting the Characterization The following command can be used to test the probe characterization: CO=<value><EOS> returns a temperature calculated from resistance The 1504 will respond with a temperature[...]

7.3.4.1 Setting the Duplex Mode When the RS-232 duple x mode is set to FULL all commands recei ved by the 1504 from the RS-232 port are echoed back. Setting t he mode to HALF dis - ables the echo. The duple x mode can be set remotely using the commands: DU=F<EOS> sets duplex to full DU=H<EOS> sets duplex to half 7.3.4.2 Setting the Line[...]

7.3.5.4 Setting the Serial Number The follo wing command is used to set the serial number of the 1504: *SN=<value><EOS> sets the instrument’ s serial number 7.3.6 Other Commands Remaining commands are described belo w . 7.3.6.1 Instrument Identification The follo wing command returns the model number and fi rmware v ersion number: *VE[...]

8 Calibration Pr ocedure The 1504 uses a three-point calibration scheme with a quadrati c polynomial correction function to maintain the accura c y of its resistance measurement. The three calibration poin ts are at 0 Ω ,1 0k Ω , and 100 k Ω . Three calibr ation pa - rameters determine the correction function: CAL0, CAL10, and CAL100. The CAL0 p[...]

8.2 Calibration Procedure Calibration requires four-wire 10 k Ω and 100 k Ω resistors of 25 ppm uncer - tainty and a 0 Ω resistor (or short). For v erification, 4 k Ω a n d4 0k Ω resistors of 25 ppm uncertainty , and a 1 M Ω resistor of 75 ppm uncert ainty are also re - quired. The resistors are connected to the input the same w ay probes are[...]

9 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. A void operating the instrument in an oily , wet, dirty , or dusty environments.[...]

10 T r oubleshooting In case you run into dif ficulty while operat ing the 1504, this sect ion provides some suggestions that may help you solve the probl em. Belo w are sev eral situa - tions that may arise follo wed by possible causes of the problem and suggested actions you might take . Incorrect T emperature Reading While attempting to measur e[...]

• Stem conduction error . The problem may be that the actual temperature of the sensor is not what you expect. This is often the result of stem con - duction where heat flowing through the stem of the probe to ambient af - fects the temperature of the probe. It is very important that immersion probes be inserted to an adequately depth into the ma[...]

10.1.1.1 Imm unity T esting The instrument was t ested to the requirements for industrial locations. This al - lo ws the instrument t o be used in all types of l ocations from the l aboratory to the factory floor . Criterion C was used fo r Electrostatic Dischar ge (ESD, IEC 61000-4-2) and Electric F ast T ransit (EFT , Burst, IEC 61000-4-4). If th[...]