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Fluke Hart Scientific 1575 Super-Thermometer User Manual

Fluke Hart Scientific 1575 Super-Thermometer
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1575/1590
Thermometer Readout
User’ s Guide
Rev. 5B2802
Hart Scientific

Table of Contents

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Fluke Hart Scientific 1575 Super-Thermometer Specifications

General IconGeneral
BrandFluke
ModelHart Scientific 1575 Super-Thermometer
CategoryThermometer
LanguageEnglish

Summary

1 Before You Start

1.1 Symbols Used

Lists symbols used in the manual and on the instrument.

1.2 Safety Information

Provides safety warnings and definitions for hazards.

1.2.1 WARNINGS

Identifies conditions and actions that may pose hazards to the user.

1.2.2 CAUTIONS

Identifies conditions and actions that may damage the instrument.

1.3 Authorized Service Centers

Lists authorized service centers for product support and repairs.

2 Introduction

2.1 General Description

Describes the 1575/1590 Super-Thermometer and its capabilities.

2.2 Theory of Operation

Explains the electronic design and measurement principles of the instrument.

2.2.1 Measurement Technique

Details the resistance ratio measurement method used by the instrument.

2.2.2 Performance Issues

Discusses sources of error and how the instrument addresses them.

2.2.2.1 Lead Resistance

Explains how lead resistance is eliminated using a four-wire circuit.

2.2.2.2 Thermoelectric EMF

Details how thermoelectric EMF errors are canceled using a specific technique.

2.2.2.3 Reactance

Explains how DC circuitry minimizes errors from reactance.

2.2.2.4 Leakage

Discusses how DC operation ensures accuracy with minimal leakage.

2.2.2.5 Self-heating

Explains how self-heating is controlled via current adjustment.

2.2.2.6 Component Drift

Describes how component drift is managed through self-calibration.

2.2.2.7 Noise and Resolution

Discusses sources of noise and how resolution is achieved.

2.2.2.8 Nonlinearity

Details steps taken to minimize nonlinearity for precise measurements.

2.2.2.9 Measurement Speed

Highlights the instrument's fast measurement capability (2 seconds per measurement).

2.2.2.10 Solid-State Design

Explains the benefits of the semiconductor circuit design for reliability and cost.

3 Specifications and Environmental Conditions

3.1 Specifications

Lists detailed electrical and performance specifications for the instrument.

3.2 Environmental Conditions

Outlines acceptable operating temperature, humidity, and pressure ranges.

3.3 Warranty

Details the product warranty terms and conditions provided by the manufacturer.

4 Quick Start

4.1 Unpacking

Guides the user on how to unpack the instrument and verify contents.

4.2 Learn About the Features and Components

Advises users to familiarize themselves with the instrument's features and components.

4.3 2575/2590 Scanner Setup

Directs users to relevant sections for setting up the optional scanners.

4.4 Power Source

Explains how to select and set the correct input voltage for the instrument.

4.5 Probe Connection

Details how to connect the SPRT or thermistor probe using the DWF connectors.

4.6 Switch the Power On

Instructs on how to turn the instrument on and what to expect during startup.

4.7 Measure Temperature

Provides a step-by-step guide for setting up and taking temperature measurements.

5 Parts and Controls

5.1 Front Panel

Describes the components and controls found on the front panel of the instrument.

5.2 Back Panel

Details the connectors and controls located on the rear panel of the instrument.

5.3 Front Panel Display

Explains the features and data displayed on the instrument's LCD screen.

5.4 Front Panel Buttons

Describes the functions of the various buttons on the front panel.

6 General Operation

6.1 Applications

Lists various applications for which the 1575/1590 thermometer is well-suited.

6.2 Suggestions for Best Results

Provides tips and recommendations for achieving the best measurement results.

6.2.1 Maintaining Accuracy

Offers detailed suggestions on how to maintain measurement accuracy.

6.2.2 Evaluating Temperature Uncertainty

Explains how to determine the instrument's contribution to total system uncertainty.

6.3 Answers to Some Common Questions

Addresses frequently asked questions regarding the instrument's functionality.

7 Front Panel Operation

7.1 Channel Menu

Explains how to select and manage input channels for measurements.

7.1.2 Measure Input 2

Details how to select the second input channel for measurements.

7.1.3 Alternate Channels

Describes the mode for automatically switching between input channels.

7.2 Sample Menu

Covers functions for controlling sampling, timing, and statistics.

7.2.1 Sampling Run/Stop

Explains how to start and stop the data sampling process.

7.2.2 Sample N

Details how to program the instrument for a specific number of measurements.

7.2.3 Sample Timing

Describes parameters for setting conversion time, sample interval, and integration period.

7.2.4 Digital Filter

Explains how the digital filter removes noise and improves measurement resolution.

7.2.5 Reset Statistics

Explains how to clear statistical registers for new calculations.

7.3 Memory Menu

Covers functions for storing and retrieving measurements in memory.

7.3.1 Store Sample

Details how to store the most recent measurement into a memory location.

7.3.2 Write Value

Explains how to enter arbitrary values into memory locations.

7.3.3 View Memory

Describes how to scan and view the data stored in the instrument's memory.

7.3.4 Clear Memory

Explains how to clear the instrument's memory contents.

7.3.5 Run/Pause Sampling

Details how to temporarily stop or resume data sampling.

7.4 Probe Menu

Covers functions for specifying probe parameters and calibration.

7.4.1 Select Channel

Explains how to select the input channel for probe parameter editing.

7.4.2 Select Probe

Describes how to choose a probe definition for a selected channel.

7.4.3 Edit Probe

Details how to set parameters like serial number, conversion type, and current for a probe.

7.4.3.1 Serial Number

Explains how to enter or read the probe’s serial number.

7.4.3.2 Temperature Conversion

Details the algorithms used to convert resistance to temperature.

7.4.3.2.1 ITS-90

Explains how to use the ITS-90 standard for temperature conversion and calibration.

7.4.3.2.2 IPTS-68

Describes the IPTS-68 option for probes calibrated to the 1968 scale.

7.4.3.2.3 Callendar-Van Dusen

Explains the Callendar-Van Dusen conversion for industrial probes.

7.4.3.2.4 Polynomial

Details using polynomial equations for non-standard temperature sensors.

7.4.3.2.5 Thermistor

Explains using Steinhart-Hart equations for thermistor conversion.

7.4.3.2.6 Resistance

Describes how to display measurements directly as resistance in ohms.

7.4.3.2.7 W(T90)

Explains displaying ITS-90 resistance ratio W(T90).

7.4.3.2.8 Ratio

Details displaying measurements as a resistance ratio.

7.4.3.3 Reference

Explains selecting the appropriate reference resistor for measurements.

7.4.3.4 Current

Discusses optimizing driving current for accurate measurements and minimizing self-heating.

7.4.3.5 Standby Current

Explains the standby current feature for channels not actively measured.

7.4.3.6 Three-wire Offset

Describes how to compensate for lead resistance in two/three-wire measurements.

7.4.4 Calibrate Probe

Covers functions for calibrating probes to ensure accuracy.

7.4.4.1 Calibrate TPW

Details the process for calibrating the probe at the triple point of water.

7.4.4.2 Calibrate ITS-90

Guides through calibrating probes to the ITS-90 standard and calculating coefficients.

7.4.4.2.1 Calibration Using Only Fixed Points

Describes calibration using fixed-point temperatures and resistance measurements.

7.4.4.2.2 Comparison Calibration With Manual Sequencing

Explains manual sequencing for comparison calibration with a reference SPRT.

7.4.4.2.3 Comparison Calibration With Automatic Sequencing

Details automatic sequencing for comparative calibration, useful for multi-probe setups.

7.4.4.2.4 Calibration Using SPRT Resistance Comparison

Describes calibration using SPRT as a reference resistor for improved accuracy.

7.4.4.2.5 Calibration With W Values

Explains calibration using W values obtained from fixed points for higher precision.

7.4.4.2.6 Setup

Details setting up calibration parameters, probes, and channels.

7.4.4.2.9 Calculate

Explains how to calculate ITS-90 coefficients from measured data.

7.4.4.2.10 Print Report

Guides on printing calibration reports and resistance tables.

7.4.4.3 1.414 x Current

Explains using increased current to measure self-heating error.

7.4.4.4 0.707 x Current

Details restoring the original current after self-heating tests.

7.4.4.5 Conversion Test

Describes testing temperature conversion accuracy with entered resistance values.

7.4.5 Probe Disk

Covers functions for reading, writing, and formatting probe data on disk.

7.4.5.1 Save Probe

Explains how to save individual probe parameter sets to disk.

7.4.5.2 Read Probe

Details how to load probe parameter sets from disk.

7.4.5.3 Save All

Describes saving all probe parameter sets to disk at once.

7.4.5.4 Read All

Explains loading all probe parameter sets from disk.

7.4.5.5 Format Disk

Guides on formatting floppy disks for use with the instrument.

7.5 Display Menu

Covers setting up the display to show desired measurements and data.

7.5.1 Data/Graph

Explains selecting between data and graph display modes.

7.5.2 Select Display

Details how to choose from various display configurations.

7.5.3 Edit Display - Data

Guides on programming the five data fields in the data display.

7.5.4 Edit Display - Graph

Explains setting graph limits and style for visualization.

7.5.5 Display Resolution

Describes how to select the resolution for displayed measurements.

7.5.6 Clear Graph

Explains how to clear graph data and rescale the display.

7.6 System Menu

Covers functions for controlling temperature units, time, and communications.

7.6.1 Unit Menu

Details how to select measurement units (C, F, K, etc.).

7.6.2 Parameter Menu

Covers saving/loading parameters, and setting date/time.

7.6.2.1 Time

Explains how to set the instrument's date and time.

7.6.2.2 Save Parameters

Guides on saving the instrument's configuration parameters to disk.

7.6.2.3 Load Parameters

Details how to load saved instrument parameters from disk.

7.6.2.4 Reset Parameters

Explains how to reset all instrument parameters to factory defaults.

7.6.2.5 Screen Parameters

Covers settings for screen saver, brightness, and colors.

7.6.3 Disk Menu

Covers functions for setting up disk data logging and formatting disks.

7.6.4 Communications Menu

Covers setting up serial, IEEE-488, and printer interfaces.

7.6.4.1 Serial

Details configuring the RS-232 serial interface for communication.

7.6.4.2 IEEE-488

Explains configuring the IEEE-488 (GPIB) interface for system integration.

7.6.4.3 Printer

Describes connecting a printer for recording measurements.

7.6.4.4 Analog Output

Explains setting up the analog output for measurement signal representation.

7.6.4.4.1 Parameter

Details specifying the channel and measurement parameter for analog output.

7.6.4.4.2 Resolution

Explains setting the resolution for the analog output signal.

7.6.4.4.3 Offset

Describes setting the offset for the analog output voltage.

7.6.4.4.4 Center

Explains using the center function to set the analog output offset.

7.6.4.4.5 Cal

Details calibrating the analog output for improved accuracy.

7.6.5 System Calibration Menu

Covers setting/calibrating reference resistors and security lock-out.

7.6.5.1 Set External

Explains how to configure the instrument for an external reference resistor.

7.6.5.2 Set Internal

Details setting internal reference resistor values and the oven.

7.6.5.3 Calibrate Reference

Describes the procedure for calibrating the internal reference resistors.

7.6.5.4 Security Lock-out

Covers locking out parameters and functions with a password.

9 Calibration

9.1 Setup

Lists recommended standard resistors for calibration and verification.

9.2 Resistance Ratio Calibration

Details the procedure for calibrating the instrument's resistance ratio accuracy.

9.3 Reference Resistor Calibration

Explains calibrating the internal reference resistors using standard resistors.

10 2575 Scanner (optional)

10.1 Introduction

Introduces the 2575 ten-channel scanner and its function with the thermometer.

10.2 Specifications

Lists the technical specifications for the 2575 scanner.

10.3 Quick Start

Provides basic setup instructions for the 2575 scanner.

10.3.1 Connections

Details the necessary cable connections between the scanner and thermometer.

10.3.1.1 Resistance Output

Explains connecting the scanner's output to the thermometer's input.

10.3.1.2 Control Cable

Details connecting the control cable for scanner operation.

10.3.1.3 Resistance Inputs

Explains connecting probes to the scanner's input terminals.

10.3.2 Setup

Guides on setting up the scanner with the thermometer for measurements.

10.4 Parts and Controls

Describes the components and controls on the 2575 scanner's front panel.

11 2590 Scanner (optional)

11.1 Introduction

Introduces the 2590 ten-channel scanner for the 1590 thermometer.

11.2 Specifications

Lists the technical specifications for the 2590 scanner.

11.3 Quick Start

Provides basic setup instructions for the 2590 scanner.

11.3.1 Connections

Details the necessary cable connections between the scanner and thermometer.

11.3.1.1 Resistance Output

Explains connecting the scanner's output to the thermometer's input.

11.3.1.2 Control Cable

Details connecting the control cable for scanner operation.

11.3.1.3 Resistance Inputs

Explains connecting probes to the scanner's input terminals.

11.3.2 Setup

Guides on setting up the scanner with the thermometer for measurements.

11.4 Parts and Controls

Describes the components and controls on the 2590 scanner's front panel.

12 Maintenance

13 Troubleshooting

13.1 Troubleshooting

Lists common problems and their likely causes and solutions.

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