Fluke 1521 User Manual

Hart Scientific

1521

Handheld Thermometer Readout

User’s Guide

Rev. 571203 ENG

Limited Warranty & Limitation of Liability

Each product from Fluke's Hart Scientific Division ("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. Parts, product repairs, and services are warranted for 90 days. The warranty extends only to the original buyer or end-user cus tomer of a Hart authorized reseller, and does not apply to fuses, disposable batteries or to any other prod uct which, in Hart's opinion, has been misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling. Hart warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective me dia. Hart does not warrant that software will be error free or operate without interruption. Hart does not warrant calibrations on Handheld Thermometer Readouts.

Hart authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Hart. Warranty support is available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable international price. Hart reserves the right to invoice Buyer for importation costs of repairs/replacement parts when product purchased in one country is submitted for repair in another country.

Hart's warranty obligation is limited, at Hart's option, to refund of the purchase price, free of charge re pair, or replacement of a defective product which is returned to a Hart authorized service center within the warranty period.

To obtain warranty service, contact your nearest Hart authorized service center or send the product, with a description of the difficulty, postage, and insurance prepaid (FOB Destination), to the nearest Hart authorized service center. Hart assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Hart determines that the failure was caused by misuse, alteration, accident or abnormal condition or operation or handling, Hart will provide an estimate or repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

Rev. 571203

THIS WARRANTY IS BUYER'S SOLE AND EXCULSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IM PLIED WARRANTY OF MERCHANTABLILTY OR FITNESS FOR A PARTICULAR PURPOSE. HART SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL. OR CONSE QUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of com petent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

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

1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.2 Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 4

2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Specifications and Environmental Conditions . . . . . . . . . . 9

3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . 10

4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 Use Proper Care with the 1521 and Accessories . . . . . . . . . . 11

4.3 Learn About the Features and Components . . . . . . . . . . . . . 11

4.4 Connect the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5 Connect the Power Source . . . . . . . . . . . . . . . . . . . . . 12

4.6 Switch the Power On . . . . . . . . . . . . . . . . . . . . . . . . 12

4.7 Measure Temperature . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1 Front Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.2 Top and Side Features . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3 Back Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.4 Internal Features. . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 19

6.1 Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2 DC Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3 Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.4 Display and Backlight . . . . . . . . . . . . . . . . . . . . . . . . 21

6.5 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.4 Delta(x) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.5 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.6 Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.7 Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.8 CAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.8.1 Mtr Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.8.2 Prb Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.8.3 Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.8.4 Passcode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.8.5 Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.8.6 Probe Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.8.7 Prb #. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.8.8 Prb Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.8.9 ITS-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.8.10 IEC751 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.8.11 CVD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.8.12 YSI-400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.8.13 THERM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.8.14 Probe Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.8.15 PCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.8.16 PDue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.8.17 Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.8.18 MCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.8.19 MDue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.8.20 CAL1 and CAL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

8 Communications Interface. . . . . . . . . . . . . . . . . . . . 37

8.1 RS-232 Connection . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.2 Communication Command List . . . . . . . . . . . . . . . . . . . 38

8.2.1 Primary Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.2.2 Calibration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.1 Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . 43

9.2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 43

10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

11 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 47

11.1 An Error Message Is Displayed . . . . . . . . . . . . . . . . . . . 47

11.2 CE Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

11.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

11.2.1.1 Immunity Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

11.2.1.2 Emission Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

11.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 49

iii

Figures and Tables

Table 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1

Figure 1 Front of the 1521. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 2 Top and Side View . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 3 INFO-CON Connector . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 4 Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 5 12V DC Power Source Polarity . . . . . . . . . . . . . . . . . . . . . 21

Figure 6 Probe Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 7 Operating Modes Flowchart . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 8 RS-232 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

1 Before You Start

1.1 Symbols Used

Table 1 lists the International Electrical Symbols. Some or all of these symbols may be used on the instrument or in this manual.

Table 1 International Electrical Symbols

Symbol Description

AC (Alternating Current)

AC-DC

Battery

CE Complies with European Union Directives

1 Before You Start

Symbols Used

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

1521 Handheld Thermometer Readout

User’s Guide

Symbol Description

Canadian Standards Association

OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re fers to the level of Impulse Withstand Voltage protection provided. Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation. Examples include household, office, and laboratory appliances.

C-TIC Australian EMC Mark

The European Waste Electrical and Electronic Equipment (WEEE) Directive (2002/96/EC) mark.

1.2 Safety Information

Use this instrument only as specified in this manual. Otherwise, the protection provided by the instrument may be impaired.

The following definitions apply to the terms “Warning” and “Caution”.

• “Warning” identifies conditions and actions that may pose hazards to the

user.

• “Caution” identifies conditions and actions that may damage the instru-

ment being used.

1.2.1

Warnings

To avoid personal injury, follow these guidelines.

•

DO NOT use this unit in environments other than those listed in the User’s Guide.

•

Follow all safety guidelines listed in the User’s Guide.

•

Calibration equipment should only be used by trained personnel.

•

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

•

Before initial use, or after transport, or after storage in humid or semi-hu mid environments, or anytime the instrument has not been energized for more than 10 days, the instrument needs to be energized for a "dry-out" period of 2 hours before it can be assumed to meet all of the safety re quirements of the IEC 1010-1. If the product is wet or has been in a wet environment, take necessary measures to remove moisture prior to apply ing power such as storage in a low humidity temperature chamber operating at 50°C for 4 hours or more.

•

This instrument can measure extreme temperatures. Precautions must be taken to prevent personal injury or damage to objects. Probes may be ex tremely hot or cold. Cautiously handle probes to prevent personal injury.

1 Before You Start

Safety Information

Carefully place probes on a heat/cold resistant surface or rack until they reach room temperature.

The AC adapter can present safety concerns if misused or damaged. To

•

avoid 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 in any way, discontinue its use immediately and have it replaced. Never disassemble the AC adapter. Use only the AC adapter provided with the instrument or equivalent adapter recommended by the manufacturer of this instrument.

The AC adapter has circuits with high voltage inside that could present

•

danger of electrical shock or fire if exposed. If the AC adapter is damaged in any way or becomes hot, discontinue its use immediately, disconnect it from any AC supply, and have it replaced. Do not attempt to open, repair, or continue using a damaged or defective AC adapter.

The instrument batteries can present danger if not handled properly. To

•

avoid the risk of exposure to dangerous substances or explosion, immedi ately remove the batteries and discontinue use if they leak or become damaged. Never allow the batteries to be shorted, heated, punctured, or dropped. If the instrument is physically damaged, immediately remove the batteries to insure that they do not become shorted. While removed from the instrument, store the batteries in a location so that they do not come into contact with metal or fluids that might short circuit the batteries and where they are safe from excessive temperatures. Used batteries must be disposed of properly. Check your local regulations for additional information. You may return the used batteries to the manufacturer. Never dispose of batteries in fire which may result in explosion with the possibility of personal injury or property damage.

• DO NOT use this instrument in combination with any probe (RTD or

thermistor) to measure the temperature or resistance of any device that is electrically energized. Severe electric shock, personal injury, or death may occur.

1.2.2

Cautions

To avoid possible damage to the instrument, follow these guidelines.

•

If the instrument is dropped, struck, or handled in a way that causes inter nal or external physical damage, immediately unplug the AC adapter, re move the batteries, discontinue use, and contact the factory for repair. Do not attempt to disassemble or repair the instrument, batteries, or AC adapter. Refer repairs or replacement components to the manufacturer.

•

The instrument and thermometer probes are sensitive and can be easily damaged. Always handle these devices with care. DO NOT allow them to be dropped, struck, stressed, or overheated.

•

DO NOT leave the AC adapter plugged in for more than 24 consecutive hours or the battery life could be degraded.

1521 Handheld Thermometer Readout

User’s Guide

Probes are fragile devices which can be damaged by mechanical shock,

•

overheating, 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 NOT allow probes to be dropped, struck, bent, or stressed.

•

DO NOT overheat probes beyond their recommended temperature range.

•

DO NOT allow any part of the probe other than the sheath to be im

•

mersed in fluid.

DO NOT allow the probe hub or wires to be exposed to excessive temper

•

atures.

Keep the probe wires clean and away from fluids.

•

1.3 Authorized Service Centers

Please contact one of the following authorized Service Centers to coordinate service on your Hart product:

Fluke Corporaton, 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

Fluke Nederland B.V.

Customer Support Services

Science Park Eindhoven 5108

5692 EC Son

NETHERLANDS

Phone: +31-402-675300

Telefax: +31-402-675321

E-mail: ServiceDesk@fluke.nl

Fluke Int'l Corporation

Service Center - Instrimpex

Room 2301 Sciteck Tower

22 Jianguomenwai Dajie

1 Before You Start

Authorized Service Centers

Chao Yang District

Beijing 100004, PRC

CHINA

Phone: +86-10-6-512-3436

Telefax: +86-10-6-512-3437

E-mail: xingye.han@fluke.com.cn

Fluke South East Asia Pte Ltd.

Fluke ASEAN Regional Office

Service Center

60 Alexandra Terrace #03-16

The Comtech (Lobby D)

118502

SINGAPORE

Phone: +65 6799-5588

Telefax: +65 6799-5588

E-mail: antng@singa.fluke.com

When contacting these Service Centers for support, please have the following

information available:

• Model Number

•

Serial Number

•

Voltage

•

Complete description of the problem

2 Introduction

The 1521 Handheld Thermometer Readout is a low-cost, high-accuracy digital thermometer readout designed to be used with PRTs and thermistors. The unique combination of features makes this instrument suitable for a wide vari ety of applications in industry. Features and capabilities of the 1521 include the following:

Measures with platinum resistance thermometers (PRTs) and thermistors

•

Works with Hart’s special INFO-CON probe connector (which is partially

•

based on U.S. Patent 5,857,777) to automatically recognize the type of sensor and its characteristics

Automatically alerts the operator when the probe calibration or meter cal

•

ibration expires

Measures with an accuracy of ±0.025°C at 25°C with PRTs and ±0.005°C

•

at 25°C with thermistors

• Accepts three- or four-wire sensors to eliminate lead resistance errors

• Is immune to thermoelectric EMF

• Measures with a fast one-second measurement cycle

• Displays maximum, minimum, and delta temperatures

• Stores up to six measurements in memory

• Uses a unique factory-assigned pass-code to protect programmed settings

• Displays measurements and settings on a high-contrast LCD display

• Communicates with other equipment using an RS-232 serial interface

•

Can be powered from its AC adapter or rechargeable battery

2 Introduction

3 Specifications and Environmental Conditions

3 Specifications and Environmental

Conditions

3.1 Specifications

Specifications

Resistance Range

Resistance Accuracy, PRT, one

†

year

Resistance Accuracy, thermistor,

†

one year

Temperature Range PRT: –200°C to 962°C (–328°F to 1764°F)

Temperature Accuracy, PRT

Temperature Accuracy,

2.25 k

thermistor

Temperature Accuracy, 10 k

Temperature Accuracy, 100 k

Resistance Resolution

Temperature Resolution 0.001°C, F, K, R

Probe IEC-751 or DIN-43760 PRT

Probe Connector Hart Scientific INFO-CON connector

Maximum Acceptable Probe Lead Resistance

Probe Excitation Current PRT: 0.5 mA

Measurement Period 1 second

thermistor

†

to 500 k

0Ωto 25Ω: 0.002 25Ωto 400Ω: 0.008% (80 ppm) of reading

0Ωto2kΩ:0.4 2kΩto 200 kΩ: 0.02% (200 ppm) of reading 200 k

Thermistor: –50°C to 150°C (–58°F to 302°F)

–200°C to 100°C: ±0.025°C (0.045°F) 100°C to 400°C: ±0.05°C (0.09°F) 400°C to 800°C: ±0.1°C (0.18°F) 800°C to 962°C: ±0.15°C (0.27°F)

–50 to 25°C: ±0.005°C (0.009°F) 25°C to 50°C: ±0.01°C (0.018°F) 50°C to 75°C: ±0.03°C (0.054°F) 75°C to 100°C: ±0.08°C (0.144°F)

0 to 50°C: ±0.005°C (0.009°F) 50°C to 75°C: ±0.01°C (0.018°F) 75°C to 100°C: ±0.02°C (0.036°F) 100°C to 125°C: ±0.05°C (0.09°F) 125°C to 150°C: ±0.1°C (0.18°F)

0 to 50°C: 0.006°C (0.011°F) 50°C to 150°C: 0.009°C (0.016°F)

0.001

Callendar-Van Dusen calibrated PRT; nominal 100 ITS-90 calibrated 25Ωor 100ΩPRT YSI-400 series or equivalent 2252 Steinhart-Hart thermistor polynomial; nominal R(25°C) 2k 100k

Thermistor: 5

to 500 kΩ: 0.03% (300 ppm) of reading

thermistor

1521 Handheld Thermometer Readout

User’s Guide

Digital Filter Exponential with adjustable time constant (1 to 60 seconds)

Remote Communications RS-232 serial

Display LCD, 6-digit x 7-segment with 16-character alphanumeric

Operating Temperature Range 0 to 40°C (32 to 104°F) absolute

Power 12 VDC (AC adapter included)

Safety OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per

Size 7.75"H x4.2"Wx1.5"D (20 cm H x 11 cm W x 4 cm D)

Weight 0.4 kg (1.0 lb.)

†

Accuracy specifications apply from 15 to 35°C. Accuracy specifications over the entire absolute operating range are 1.5 times the stated values. Temperature accuracy does not include probe uncertainty or probe characterization errors. The practical measurement range may be limited by the sensor.

3.2 Environmental Conditions

15 to 35°C (59 to 95°F) full accuracy

Rechargeable NiMH batteries (included)

IEC1010-1 refers to the level of Impulse Withstand Voltage protec tion provided. Equipment of OVERVOLTAGE CATEGORY II is en ergy-consuming equipment to be supplied from the fixed installation. Examples include household, office, and laboratory appliances.

Although the instrument has been designed for optimum durability and trouble-free operation, it must be handled with care. The instrument should not be operated in an excessively dusty, dirty, or wet environment. Maintenance and cleaning recommendations can be found in the Maintenance section of this manual.

For full accuracy, operate the instrument in ambient temperatures between 15-35°C (59-95°F). Do not operate the instrument in an environment colder than 5°C (41°F) or warmer than 50°C (122°F).

The instrument operates safely under the following conditions:

•

Operating temperature range: absolute 5–50°C (41–122°F); full accuracy15-35°C (59-95°F)

•

ambient relative humidity: maximum 80% for temperature <31°C, de

creasing linearly to 50% at 40°C

•

Pressure: 75kPa-106kPa

•

Vibration should be minimized

•

Altitude less than 2,000 meters

•

Indoor use only

4 Quick Start

This section briefly explains the basics of setting up and operating your 1521 Thermometer.

4.1 Unpacking

Carefully unpack the 1521 and accessories and inspect them to make sure all components are present and in satisfactory condition. Verify that the following items are present:

1521 Thermometer

•

AC Adapter (clamp-on ferrite installed)

•

Serial Cable

•

User’s Guide

•

• Report of Calibration

• Calibration Label

• Pass-code Notice

• INFO-CON Connector

• Clamp-on ferrite with instructions for probe

• Probe (optional—must be purchased separately)

If all items are not present, call an Authorized Service Center (see Section 1.3).

4 Quick Start

Unpacking

4.2 Use Proper Care with the 1521 and Accessories

First and most important is to understand the safety issues related to the 1521 and its accessories. Be aware that potential hazards exist due to high tempera tures, high voltages, and battery chemicals. Carefully read Section .

CAUTION: The 1521 and any thermometer probes are sensitive instru

ments that can be easily damaged. Always handle these devices with care. DO NOT allow them to be dropped, struck, stressed, or overheated.

4.3 Learn About the Features and Components

Familiarize yourself with the features and accessories of the 1521 by reading Section 5.

4.4 Connect the Probe

The PRT or thermistor probe connects to the top of the 1521 using Hart’s unique INFO-CON probe connector. The probe connector is inserted into the

1521 Handheld Thermometer Readout

User’s Guide

top of the instrument with the ridged side down. It will fit snugly and lock into place when it is fully inserted.

The INFO-CON probe connector includes a memory device that stores the unique characteristics of the probe, allowing the 1521 to measure tempera ture accurately. If your probe was purchased from Hart for use with the 1521 it should already have the connector attached and properly programmed. You can use your own probe with the 1521, but you must attach it with an INFO-CON connector. See Section 6.6 for more information on the INFO-CON connector.

4.5 Connect the Power Source

The 1521 draws power from either a DC power supply (the included AC adapter) connected to the DC input or the internal rechargeable battery pack. To use the AC adapter, plug it into a wall outlet of the appropriate voltage and in sert the DC plug into the DC power input of the 1521 (see Figure 2.) To use the battery pack it must first be fully charged using the AC adapter (see Section

6.1).

4.6 Switch the Power On

Power is switched on and off with the power button located below and to the left of the display. To switch the power on, hold the power button down for at least two seconds. (To switch power off, momentarily press the power button again.) The instrument takes a few seconds to power up, initialize itself, and begin normal operation. During initialization the lower line of the display shows the manufacturer, model number, firmware version, and the state of battery charge or the message “External power” if the AC adapter is attached. The 1521 reads important information about the attached probe from the INFO-CON connector that it subsequently uses to calculate temperature.

The 1521 then performs a memory check of critical parameters, such as the cal ibration parameters CAL1 and CAL2. During this check the lower line of the display reads “Checking Memory”. If a “Memory Error” or “Memory Recover” message is displayed, see Section 12.1, Troubleshooting, for additional infor mation and instructions.

4.7 Measure Temperature

After initialization the upper line of the display will begin to show temperature measurements sensed at the tip of the probe. Place the tip of the probe into the object that you want to measure the temperature. DO NOT force the probe or otherwise allow it to be bent, stressed, or overheated. It can be easily damaged if misused. For further suggestions on handling the probe and using the 1521 and probe to measure temperature accurately, see Section 6.5. For information on the various modes of operation of the 1521see Section 7.

+ 35 hidden pages

Fluke 1521 User Manual

Table of Contents

Figures and Tables