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Fluke 1521 - page 1
1521 Handheld Thermometer Readout User’ s Guide Rev. 571203 ENG Hart Scientific ...
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Fluke 1521 - page 2
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 one year for the Handheld Thermometer Readout. The warranty period begins on the date of the shipment. P ...
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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 ...
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6.6 INFO-CON Connector . . . . . . . . . . . . . . . . . . . . . . . 23 7 Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.1 Blank Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7.2 Min/Max Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7.3 Hold Mode . . . . . . . . . . . . . . . . . . . . . ...
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11 T roubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 47 11.1 An Error Message Is Displayed . . . . . . . . . . . . . . . . . . . 47 11.2 CE Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 11.2.1 EMC Directiv e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 11.2.1.1 Immunity T esting . . . ...
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iv Figures and T ables T able 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1 Figure 1 Front of the 1521 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 2 T op and Side V ie w . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 3 INFO-CON Connector . . . . . . . . . . . . . . . . . . ...
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1 Bef ore Y ou Start 1.1 Symbols Used T able 1 lists the International Electri cal Symbols. Some or all of these symbols may be used on the instrument or in this manu al. Symbol Description AC ( Alternating Current) AC- D C Batter y CE Complies with European Uni on Directiv es DC Double Insulated Electric Shock Fuse PE Ground Hot Surf ace (Bur n Ha ...
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Symbol Description 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 hou ...
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Carefully place probes on a heat/cold resistant surface or rack until they reach room temperature. • The A C adapter can present safety concerns if misused or damaged. T o av oid the risk of electric shock or fire, do not use the AC adapter outdoors or in a dusty , dirty , or wet environment. If the cord, case, or plug of the adapter is damaged i ...
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• Probes are fragile devices which can be damaged by mechanical shock, ov erheating, and absorption of moisture or fluids in the wires or hub . Damage may not be visibly apparent but nevertheless can cause drift, in - stability , and loss of accuracy . Observe the following precautions: • DO NO T allo w probes to be dropped, struck, bent, or st ...
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Fluke 1521 - page 11
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.han@fluke.com.cn Fluke South East Asia Pte Ltd. Fluke ASEAN Regional Of fice Service Center 60 Alexandra T errace #03-16 The Comtech (Lobby D) 118502 SINGAPORE Phone: +65 6799-5588 T elefax: +65 6799-5588 E-mail: antng@singa.fluke.com ...
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2 Intr oduction The 1521 Handheld Thermometer Readout is a lo w-cost, high-accuracy digital thermometer readout designed to be used wit h PR Ts and thermistors. The unique combination of features makes thi s instrument suitable for a wide v ari - ety of applications in industry . Featur es and capabilities of the 1521 include the following: • Mea ...
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3 Specifications and En vir onmental Conditions 3.1 Specifications Resistance Range 0 Ω to 500 k Ω Resistance Accuracy, PRT, one year † 0 Ω to 25 Ω : 0.002 Ω 25 Ω to 400 Ω : 0.008% (80 ppm) of reading Resistance Accuracy, thermi stor, one year † 0 Ω t o2k Ω :0 . 4 Ω 2k Ω to 200 k Ω : 0.02% (200 ppm) of reading 200 k Ω to 500 k Ω : ...
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Digital Fil ter Exponential with adj ustable time const ant (1 to 60 seconds) Remote Communications RS-232 serial Display LCD, 6-digit x 7-segment with 16-charact er alphanumeric Operating Temperatur e Range 0 to 40°C (32 to 104°F) absolut e 15 to 35°C (59 to 95°F) f ull accuracy Power 12 VDC (AC adapter included) Rechargeable NiMH batter ies ( ...
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4 Quic k Start This section briefly explains the basics of setting up and operating your 1521 Thermometer . 4.1 Unpac king Carefully unpack the 1521 and accessories and inspect them to make sure all components are present and in satisf actory condition. V erify that the following items are present: • 1521 Thermometer • A C Adapter (clamp-on fer ...
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Fluke 1521 - page 16
top of the instrument with the ridged side down. It will f it snugly and l ock into place when it is fully inserted. The INFO-CON probe connector includes a memory de vice that stores the unique characteristics of the probe, allo wing the 1521 to measure tempera - ture accurately . If your probe was purchased from Hart for use with the 1521 it shou ...
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5 P ar ts and Controls The functions of the v arious features of the 1521 are described belo w . 5.1 Fr ont Features The front of the 1521 features the LCD display and control b uttons. 13 5 Parts and Controls Front Features ...
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Display -The display sho ws the current temperature (or resist ance) measure - ment on the large numeri c upper portion of the display . It can also show a vari - ety of information on the small er alphanumeric lo wer portion such as minimum, maximum, hold temperature s, delta(x), and other instrumen t settings. Po wer and Backlight button -This b ...
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5.2 T op and Side Features The top and side of the 1521 feature the probe connector , DC power input, se - rial port, and infrared windo w . Probe Connector - At the t op of the thermometer is the opening where the probe connector is inserted. The probe must be connected using an INFO-CON probe connector to measure temperature (see Section 6.6). DC ...
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5.3 Bac k Features See Figure 4 on page 19. Stand -The stand at the back of the 1521 can be flipped do w n to prop up the in - strument for better viewing. Battery Compartment - Behind the stand is the compartment that contains the battery pack. The battery pack can be accessed if necessary by opening the bat - tery cove r with a small Philips scre ...
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5.5 Accessories The 1521's accessories and their features are described here. AC A d a p t e r -The A C adapter recharges the internal battery pack and can also be used to supply po wer to operate the 1521 whi le the battery i s being char ged (see Section 6.2). Serial Cable -The serial cable can be used to connect a computer or a printer to t ...
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Ordering Infor mation Model Type Range Size Cal Uncertainty and Repeatability Typical Drift (1 year) 5626 Pt-100 Ohm, 4-wire –200 to 660°C 1/4” x 12” or 15” (6.35 x 305 or 381 mm) ±0.015°C ±0.03°C 5628 Pt-25 Ohm, 4-wire –200 to 660°C 1/4” x 12” or 15” (6.35 x 305 or 381 mm) ±0.015°C ±0.03°C 5614 Pt-100 Ohm, 4-wir e –200 ...
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6 General Operation This section e xplains the details of t he operation of the 1521 with its compo - nents and accessories. 6.1 Battery The 1521 has a b uilt-in nickel-metal-hydride battery pack that can po wer the instrument for about 18 hours before needing to be recharged. The battery will discharge much more quickl y if the display backlight i ...
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on. The power control circuit i nside the instrument manages battery char ging and will stop charging the battery automatically wh en it’ s fully charged. It nor - mally tak es about four hours to full y charge t he battery . The instrument can be operated while the battery is bein g charged. CA UTION: DO NOT leave the A C adapter plugged in for ...
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adapter supp lied with the instru ment. The DC power source p lugs into th e DC power i nput on the right side of the 1521. W ARNING: The AC adapter has cir cuits with high voltages inside that could pr esent danger of electric shock or f ir e if exposed. If the AC adapter is damaged in any way or becomes hot, discontinue its use immediately , disc ...
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Fluke 1521 - page 26
smaller type to the right of the measurement. The possibl e units are de grees Celsius (C), resistance in oh ms ( Ω ), degrees F ahrenheit (F), K elvin (K), and degrees R ankine (R). The unit s can be easily changed by placing the di splay in the units setting mode using th e MODE button (see Section 7.5). The lo wer part of the display has variou ...
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Fluke 1521 - page 27
T emperature is generally sensed at the tip of the probe. T o get an accurate tem - perature measurement the probe sheath should be well immersed, with ade - quate depth and fit, into the mediu m to be measured. CA UTION : Pr obes ar e fra gile devices that can be easily damaged by me - chanical shock, o verheating, and absorption of moisture or fl ...
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ognize that accurac y may be significantly de graded using a two-wire connec - tion because of wire resistance. 1521 Handheld Thermometer Readout User’s Guide 24 GND P1 C2 P2 C1 J1 J2 Four-wire Connection GND P1 C2 P2 C1 J1 J2 Three-wire Connection GND P1 C2 P2 C1 J1 J2 T wo-wire Connection Shor t Shor t Figure 6 Probe Wir ing Diagrams ...
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7 Displa y Functions The 1521 operates in an y of se ve ral modes which determine what information is visible in the l ower al phanumeric portion of the display . The MODE button changes the mode. This b utton can be pressed repeatedly unt il a desired mode is set. The various modes are listed below in the order they appear . (See Figure 7). Blank ...
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Each of these operating mod es is described in the sections that follow . 7.1 Blank Mode This mode is identified by “Blank” that temporarily app ears on the display . 1521 Handheld Thermometer Readout User’s Guide 26 Blank Mode Set Units Min/Max Mode Set Rate Hold Mode Set Resolution Cal Mode button button button button button button button ( ...
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In this mode nothing appears on the alphanumeric porti on of the display . Use this mode if you are only interested in the latest measurements and want to sim - plify the appearance of the display . The message “Prb cal expired”, “M tr cal e xpired”, “Recharge Needed”, or “Probe is locked” may be displayed. See Sect ion 11.1. 7.2 Mi ...
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7.5 Units This mode is identified by “Un its: C/ Ω /F/K/R” that a ppears on the display . This mode allo ws you to select the unit of measurement: C for degrees Celsius, Ω for resistance in ohms, F for de grees F ahrenheit, K for K elvin, and R for Rankine. The Up and Down b u ttons are used to select one of the displayed units. The underline ...
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Fluke 1521 - page 33
7.8 CAL MODE The calibration menu contains fu nctions for setting pro be and instrument cali - bration parameters. If a probe parameter is changed, the probe parameter is up - loaded into the INF O-CON prob e connector wh en the CAL MODE is exited or after scrolling through the entire menu. Always check to insure that the param - eters hav e been w ...
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Beta [CVD only] - Set the beta probe coefficient b0 [Therm only] - Set the b0 probe coefficient b1 [Therm only] - Set the b1 probe coeff icient b2 [Therm only] - Set the b2 probe coeff icient b3 [Therm only] - Set the b3 probe coefficient Probe W ir es - Set the number of wires of the probe PCal - Set the probe calibration date PDue - Set the probe ...
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ensuring that it is not lost or forgot ten. If necessary the passcode can be re - stored by contacting the manufacturer . T o enter the passcode use the Up and Down b uttons to set each digit of the passcode and the ENT but to n to m ove to the next digit on the r ight. Press ENT tw ice when all digits are entered to move to the next function. If t ...
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ITS-90 PRTs calibrated to ITS-90 R(.01), a, b, c, d, a4, and b4 IEC751 PRTs (RTDs) conforming t o IEC-751 none CVD PRTs characterized by the Cal lendar-Van Dusen equation R0, Alpha, Delta, and Beta YSI400 Thermistors matchi ng the YSI-400 series none THERM Thermistors character ized by the thermistor polynomial b0, b1, b2, and b3 Each of the con ve ...
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A PR T was calibrated to ITS-90 and its calibration certificate states v alues for coeff icients R(273.16K), a4, b4, a8, and b8. Set the 1521 coef fici ents to the certificate v alues as follo ws. 1521 Coefficients Certificat e Value R(.01) R(273.16K) aa 8 bb 8 c0 . 0 d0 . 0 a4 a4 b4 b4 Example 2: A PR T was calibrated to ITS-90 and its calibration ...
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higher), and has moderate accuracy (0.05°C to 1°C). This type uses the Callendar -V an Dusen equation to calcu late temperatur e from resistance: rt C Rt t t R ([ ] ) °= +− − ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ ⎧ ⎨ ⎩ ⎫ ⎬ ⎭ ≥ 0 0 1 1 100 100 10 αδ 1 100 100 1 100 1 100 3 +− − ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ −− ⎛ ...
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Example 2: A thermistor has coef fi cients for the equation ln(R ) as a function of T gi v en as a, b, and c. Set the 1521 coeff icients to the certif icate v alues as follo ws: 1521 Coefficients Certificat e Value b0 a b1 b b2 0.0 b3 c 7.8.14 Pr obe Wires This function sets the number of connecting wires in the probe. The probe wires setting is st ...
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Note : Probe parameters are uploaded to the INFO-CON connector at thi s point. 7.8.17 Filter The digital filter helps to smooth variations in the measurements and improve resolution. A negati ve ef fect of filtering is that it tends to slo w the response to changes in temperature. Y ou can increase the filter time constant to further im - prov e ac ...
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8 Comm unications Interface Remote communications allows an e x ternal de vice, such as a computer , to com - municate with the 1521 to obtain measurement data and cont rol its operati on. Communication is accomplished with v arious commands issued to the 1521 through the RS-232 serial port . 8.1 RS-232 Connection The three-conductor jack for the s ...
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ON (all carriage returns are followed b y a linefeed (ASCII decimal 10)), and the duple x to HALF disabli ng echo. The serial port can be used to transmit measurements to a computer or printer . It can also be used to change set tings of the 1521 from a comput er or interface with software. A full list of commands follows in Section 8.2. Commands s ...
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Description Command Example Response Format Response Example Range Set resolution di gits re[solution]=n res=1 1 to 3 Read time ti[me] time ti: hh:mm:ss ti: 16:23:45 Set time Note: You must set hours, min - utes, and seconds for t he time to be set correctly. ti[me]=hh:mm: s s ti=08:15:0 0 00:00:00 to 23:59:59 Read identificat ion informati on *i[d ...
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Description Command Example Response Format Response Example Range Set probe type p[robe]=IT[S- 90]/ IE[C751]/ C[VD]/ Y[SI400]/ T[HR] pr ITS-90, IEC751, CVD, YSI400, THERM Read ITS-90 R(.01) or CVD R0 r[0] r0 r0: 9999.999 r0: 100.035 Set ITS-90 R(.01) or CVD R0 r[ 0]=n r0=100.106 1 to 900 Read ITS-90 coeffici ent a/b/c/ d/a4/b4 a {a/b/c/d/ a4/b4}: ...
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Description Command Example Response Format Response Example Range n Numeric data supplied by user 9 Numeric data retur ned to user x Character data r eturned to user 41 8 Communications Interface Communication Command List ...
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9 Calibration The 1521 should be calibrated a t re gular interv als to ensure that it conti nues to measure with proper accuracy . Calibration should only be done by qualified, authorized personnel. 9.1 Required Equipment The follo wing items are required to test and cali brate the 1521: • 0 Ω four-wire resistor (short) • 25 Ω four-wire resis ...
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4. V erify the accuracy at 0 Ω , 4k Ω ,1 0k Ω ,4 0k Ω , 100 k Ω , and 500 k Ω . 5. Set the meter calibration date to the present date (see Section 7.8.18). 6. Set the meter due date to one year from the present date (see Section 7.8.19). 1521 Handheld Thermometer Readout User’s Guide 44 ...
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10 Maintenance • This instrument has been designed with the utmost care. Ease of operation and simplicity of maintenance have been a central theme in the product dev elopment. Therefore, with proper care the instrument should require very little maintenance. A void operating the instrument in oily , wet, dirty , or dusty environments. • If the ...
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Fluke 1521 - page 49
11 T r oubleshooting In case you run into dif ficulty while operat ing the 1521, 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 . 11.1 An Error Message Is Display ed The follo wing table li ...
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Problem Solution While attempti ng to measure re - sistance the display shows an i n - correct value. Poor or incorrect connecti on of the probe. A common mista ke is to connect the wires of t he probe to the wrong t erminals. Check the wi r - ing carefully ( see Figure 6). Open, shorted, or damaged sensor or lead wires. Check the resi s - tance ac ...
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Fluke 1521 - page 51
The instrument was designed specif ically as a test and measuring device. Com - pliance to the EMC di recti ve i s through IEC 61326-1 Electrical equipment for measur ement, contr ol and labor atory use – EMC r equire ments (1998). As noted in the IEC 61326-1, the instrument can ha ve varyi ng configurat ions. The instrument w as tested in a typi ...
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