Luxtron FOT Lab Kit User Manual

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FOT Lab Kit Fluoroptic
Thermometer

User’s Manual

For firmware version 2.80 and higher

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Confidential Information

The material contained herein consists of information that is the property of LUXTRON
Corporation and intended solely for use by the purchaser of the equipment described in
this manual. All specifications are subject to change without notice. Changes are made
periodically to the information in this publication, and these changes will be incorporated
in new editions.

LUXTRON Corporation prohibits the duplication of any portion of this manual or the use
thereof for any purpose other than the operation or maintenance of the equipment
described in this manual, without the express written permission of LUXTRON
Corporation.

Copyright

© LUXTRON Corporation 2003-2005. All rights reserved.

Trademarks

LUXTRON, Fluoroptic, and the LUXTRON logo are registered trademarks
and TrueTemp is a trademark of LUXTRON Corporation.

All other trademarks are trademarks, registered trademarks, and/or service marks of their
respective holders.

LUXTRON Corporation
3033 Scott Blvd.
Santa Clara, CA 95054-3316
Telephone [phone]
FAX [phone]
E-mail [email protected]

[email protected]

Website http://www.luxtron.com

Part Number: 38-13745-01

Revision E

November 2005

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Contents

Preface

1 Introduction

FOT Lab Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Fluoroptic

2 System Components

®

Technology Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Standard Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

3 System Operation

Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4 User Interface Commands

Parameter Commands (Two-Letter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Action Commands (One-Letter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

5 Temperature Data Reporting

RS-232 Serial Interface Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

A Calibration Procedure

Digital Temperature Output Calibration Procedure . . . . . . . . . . . . . . . . . . A-1

Calibration Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Analog Temperature Output Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

FOT Lab Kit User’s Manual i

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Contents

B Warranty and Service

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Damage In Shipment for the Original Purchaser . . . . . . . . . . . . . . . . . . . . . B-2

What to do in Case of a Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Shipments to LUXTRON for Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Shipping Address:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

ii FOT Lab Kit User’s Manual

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Figures

Figure 1-1 FOT Lab Kit Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Figure 1-2 Fluoroptic

Probes, and Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Figure 1-3 Plot Representation of LUXTRON’s Fluoroptic

Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Figure 2-1 Standard Probes for Use with FOT Lab Kit . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 3-1 Connecting the FOT Lab Kit Components . . . . . . . . . . . . . . . . . . . . . 3-2

Figure 4-1 Sampling Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

®

Thermometry System Includes an Instrument,

®

Thermometry

Biomedical Lab Kit User’s Manual iii

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Figures

iv Biomedical Lab Kit User’s Manual

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Tables

Table 1-1 FOT Lab Kit Performance Specifications . . . . . . . . . . . . . . . . . . . . . . 1-6

Table 2-1 Standard Accessories for Use with FOT Lab Kit . . . . . . . . . . . . . . . . . 2-4

Table 3-1 List of Correct Lookup Tables for Various Probe Types . . . . . . . . . . . 3-3

Table 4-1 Summary Listing of Parameter Commands . . . . . . . . . . . . . . . . . . . 4-5

Table 4-2 Summary Listing of Action Commands . . . . . . . . . . . . . . . . . . . . . . . 4-5

FOT Lab Kit Fluoroptic Thermometer Users Manual v

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Table s

vi FOT Lab Kit Fluoroptic Thermometer Users Manual

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Preface

This document describes the FOT Lab Kit Fluoroptic® thermometer
and is organized into the following sections.

■ Chapter 1, “Introduction’’, provides an overview of the

LUXTRON FOT Lab Kit and Luxtron’s Fluoroptic® technology.

■ Chapter 2, “System Components’’, describes the various parts

and components that make up a complete Fluoroptic®
thermometry system.

■ Chapter 3, “System Operation’’, provides general instructions

on how to operate and use the FOT Lab Kit.

■ Chapter 4, “User Interface Commands’’, provides a detailed

description of all user interface commands and user selectable
parameters.

■ Chapter 5, “Temperature Data Reporting’’, describes the type

and format of data reported by the instrument.

■ Appendix A, “Calibration Procedure’’, describes the procedure

used to calibrate the instrument.

■ Appendix B, “Warranty and Service’’, provides warranty and

service information.

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Preface

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1 Introduction

The FOT Lab Kit is a fiber optic thermometry system that allows
users to measure temperature where conventional sensors fail.
Luxtron’s unique technology, called Fluoroptic® Thermometry
(FOT), offers probes that are totally immune to electromagnetic
interference (EMI) and of entirely non-metallic construction. These
qualities make FOT probes perfectly suited for measuring
temperatures in harsh environments, such as high voltages and
strong radio frequencies (RF), often encountered during research or
in industrial processes.

Applications include:

■ Medical treatment and research

MRI, microwave, laser, hyperthermia, RF ablation, cryogenic
treatments

■ Semiconductor equipment

Electrostatic chucks, etch and deposition chambers, Rapid
Thermal Process chambers

■ Industrial applications

RF and microwave drying, and harsh chemistries

■ Utility equipment

Transformer windings and high voltage transmission lines

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Introduction

FOT Lab Kit Contents

The FOT Lab Kit includes a four-channel Fluoroptic® thermometry
instrument shielded in a rugged steel enclosure, a universal power
supply, an RS-232 cable, and a user’s manual; all within a compact
carrying case.

Figure 1-1 FOT Lab Kit Instrument

The FOT Lab Kit Instrument uses an RS-232 serial interface for
command input and data output. The unit communicates at 9,600
bps using an 8-N-1 data format. In addition, it includes a 0-10 volt
analog output for each measurement channel.

The user interface may be accessed through standard terminal
emulation software e.g. HyperTerminal, ProComm Plus, etc.
through a customer-supplied control application, or through
LUXTRON’s Windows

®

-based TrueTemp

TM

software. Compatible
with Windows® 95/98, Windows® NT or higher, the TrueTempTM
software offers full-featured data acquisition, graphing, and analysis.

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System Overview

Introduction

A complete FOT system consists of an instrument and probe.
Optional accessories include fiber optic extension cables, vacuum
feedthroughs, and PC acquisition and graphing software (see Figure
1-2).

Figure 1-2 Fluoroptic® Thermometry System Includes an

Instrument, Probes, and Optional Accessories.

Fiber Optic

Extension Cable

(optional)

Fluoroptic Sensor

Luxtron Fluoroptic Probe

Instrument

The FOT Lab Kit Instrument is a four channel system that includes
0 to 10V analog outputs for each channel as well as an RS-232
interface.

Probes

Luxtron offers standard fiber optic probes for use with the FOT Lab
Kit. The probes are designed to suite a variety of applications.
Some are designed to measure the bulk temperature of an object
(immersion probes) while other are designed to measure the
surface temperature of an object (surface and non-contact probes).
These probes are available in standard lengths of 2, 5, and 10 meters
(see Figure 2-1, on page 2-2 for details).

LUXTRON specializes in developing custom probes to meet the
unique circumstances of OEM applications. Non-metallic and

®

electrically non-conductive, the Fluoroptic

probes are immune to

EMI and high voltages that adversely affect conventional sensors

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Introduction

such as thermocouples, RTDs and thermistors. Call a LUXTRON
applications engineer to discuss development of a custom probe for
your specific OEM application. To see examples of custom probes,
visit LUXTRON’s website at www.luxtron.com.

Accessories

The most common accessory is a fiber optic extension. The
extension allows flexible mounting or locating of the instrument
with respect to the point of measurement. Standard extension
lengths are available in 2, 5, and 10 meters.

The other category of accessories is vacuum feedthroughs. These
allow either a probe or a fiber optic extension to enter vacuum
chambers through NPT fittings or ConflatTM flanges.

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Fluoroptic® Technology Overview

The FOT Lab Kit uses LUXTRON’s patented Fluoroptic® technology,
based on a temperature sensitive phosphorescent sensor attached
to the end of an optical fiber. Pulses of light transmitted down the
fiber optic probe cause the sensor to be excited and fluoresce. The
DSP-based electronics of the FOT Lab Kit Instrument detect and
calculate the decay time of this fluorescence after each pulse. This
decay time varies precisely with the temperature of the sensor,
providing the basis for accurate temperature measurement. The
FOT Lab Kit Instrument achieves accuracy better than 0.5 oC and a
measurement range of -100 to +330 oC.

Below is a plot representation of the method used to extract the
florescence decay time (τ) of the phosphor sensor. A mathematical
curve fit correlates individual data points with stored values of (τ).
The measured value of (τ) is then conditioned with the values in a
calibration table to determine temperature.

Introduction

Figure 1-3 Plot Representation of LUXTRON’s Fluoroptic®

Thermometry Technique

Excitation
Light Pulse

Intensity

τ

Fluorescent
Signal

Time

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Introduction

Table 1-1 FOT Lab Kit Performance Specifications

Number of Channels 4

Temperature Range -100 through +330

o

C, depending upon probe specification

Electrical Interference Probes are immune to EMI and RF

Accuracy

Uncalibrated 1% of full scale

Calibrated ±0.5

Repeatability ±0.5

o

C within ±50 oC of calibration

o

C RMS at 8 samples per measurement

Temperature Resolution

RS-232 Output 0.01

Analog Output 0.01

Short Term Drift <0.2

Long Term Drift <0.5

Output Format

o

C

o

C

o

C / hour

o

C / 10 days

o

K, oC, oF (user selectable)

Self diagnosis and probe error indications available through RS-232

Self-diagnostic

interface

Input Power Universal power supply

Serial Output RS-232 serial interface at 9,600 bps, N-8-1, no handshake

Analog Output 0.0 - 10.0VDC

Dimensions 184mm x 144mm x 51mm

Storage Temperature -55 to +75

Operating Temperature 10 to 50

o

C

o

C

Maximum Humidity 80%, non-condensing

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2 System Components

The FOT Lab Kit is designed to function with a variety of standard
probes and accessories produced by LUXTRON Corporation. The
various probes are designed for different applications and are
described in Figure 2-1, “Standard Probes for Use with FOT Lab Kit,”
on page 2-2. Visit LUXTRON’s website or contact the LUXTRON
Sales Department for more detailed information.

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System Components

Probes

Standard Probes Fluoroptic probes are non-metallic and immune to EMI and radio-

frequency noise. The standard probes generally consist of a fiber­optic cable with LUXTRON’s temperature sensitive phosphor affixed
to the probing end and a fiber optic ST-style connector on the other
end for connection to the FOT Lab Kit.

Figure 2-1 Standard Probes for Use with FOT Lab Kit

Luxtron Part

Picture Description

Number

STM Probe

Application: General Purpose Immersion
Temp Range: 0 to 250
Response Time: 5s in still air

0.7s in stirred water

STF Probe

Application: Fast Response Immersion
Temp Range: 0 to 295
Response Time: 1.25s in still air

0.25s in stirred water

STS Probe

Application: Surface Contact
Temp Range: -25 to 200
Response Time: 25ms

o

C

o

C

o

C

00-13244-XX

00-13737-XX

00-13738-XX

Probe tip is a polished,
open end fiber

STR Probe Kit

Application: Non-contact Remote
Temp Range: -25 to 330

Includes:

0.1 gm Luxtron’s Alpha phosphor sensor powder
1mL 150
1mL 250
1mL 450
2m STP probe blank (see image at left)
Remote Sensing User’s Guide

o

C silicon binder

o

C silicon binder

o

C silicon binder

o

C

06-13740-01

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System Components

Custom Probes In addition to the standard probes, LUXTRON offers a custom

development program to design and integrate probes to meet the
needs of OEM applications. Custom probes have been developed
for a wide range of temperatures (from cryogenic to over 400°C),
vacuum specifications (down to 1e

-10

torr), materials and
mechanical specifications to survive various hostile environments.
Examples of some custom designs can be seen on LUXTRON’s
website at www.luxtron.com.

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System Components

Standard Options and Accessories

LUXTRON offers standard accessories for use with the FOT Lab Kit.
The most common accessory is a fiber optic extension cable. The
extension allows flexible mounting or locating of the instrument
with respect to the target being measured. Standard extension
cables are available in 2, 5 and 10 meter lengths.

Other accessories include vacuum fittings and PC data acquisition
and graphing software. See Table 2-1 below for a description of
standard accessories.

Table 2 -1 Standard Accessories for Use with FOT Lab Kit

3.0

SST Extension

Application: General purpose fiber optic
extension cable
Connector: ST, both ends

HST Extension

Application: Heavy duty fiber optic
extension cable
Connector: ST, both ends

Compression Gland Feedthrough

Temp Range: -20 to 230
Maximum Vacuum Pressure: 5e10-6 Torr
Maximum Pressure 3,000 psi

Compatible with STM, STF, and STR probes

TrueTemp PC Data Acquisition and
Graphing Software

o

C

00-13743-XX

00-13744-XX

90-1462

00-12790-01

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System Components

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System Components

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3 System Operation

Getting Started

The FOT Lab Kit is a fiber optic temperature measurement system.
All standard probes and fiber optic accessories for use with the FOT
Lab Kit have ST-style fiber optic connectors.

This “Getting Started” section will enable you to start basic
measurements, using default setups, with your FOT Lab Kit. For
more details on how to tailor the instrument to your specific needs,
please refer to the user interface details described in Chapter 4,
“User Interface Commands’’ and Chapter 5, “Temperature Data
Reporting’’.

Host Control To access the full features and interface of the FOT Lab Kit, you will

need a PC or host device to communicate via RS-232. If you are
using LUXTRON’s TrueTemp Software, we recommend you install
this software first, before connecting the instrument.

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System Operation

Connecting and
Installing the
System

The FOT Lab Kit includes various cables and accessories for
connection. Follow the steps below and refer to Figure 3-1 to setup
the system for operation:

a. Connect the 9-pin male D-sub connector to the RS-232 port

on the instrument.

b. Connect the RS-232 female connector to your computer’s

serial COM port.

c. Connect the power supply’s DIN connector to instrument’s

power inlet.

d. Remove the black dust cap(s) from the instrument’s ST

optical connection(s) and remove the clear protective cap

®

from your Fluoroptic

probe(s). Connect the probe(s) to the
instrument by aligning the polarized connector on the probe
to the optical port and gently push in. Turn clockwise to lock
the connection.

e. Plug power cord into the power supply

f. Plug power supply to a grounded power outlet.

Figure 3-1 Connecting the FOT Lab Kit Components

Fluoroptic Probe

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System Operation

Making
Temperature
Measurement

Probe Table
Settings

With default factory settings, the FOT instrument will automatically
start making temperature measurements approximately one minute
after power up. To start or stop measurements, use “Action
Commands (One-Letter) in Chapter 4, “User Interface Commands’’.
To adjust measurement rates, analog output values, and other
settings, refer to the “Parameter Commands (Two-Letter)’’, also in
Chapter 4

NOTE Keep the protective black vinyl caps on the unused instrument

probe ports. This prevents ambient light from entering the system, which
could adversely affect the accuracy of temperature measurements from
the remaining active probe(s).

The FOT Lab Kit is designed to work with many different probe
types. There are four standard industrial probes (shown earlier in
Table 2-1 on page 2-4) and some specific industry probes, for
example, medical and power transformer probes. To guarantee
system operation within specifications, the FOT Lab Kit must be
configured to operate with your specific probe type. This is done by
selecting the correct lookup table. See Table 3-1 below to lookup
the correct calibration table for your probe type.

Table 3 -1 List of Correct Lookup Tables for Various Probe Types

Probe Type Description Look Up Table

STF Fast Response Immersion Probe T1

STR Non-contact, Remote Sensing Kit T1

WTS Power Transformer Winding Hot Spot Probe T1

STS Surface Contact Probe T2

STB Medical, 0.5mm Diameter Probe T2

MRC Medical, Core Temperature T2

MRR Medical, Skin and Core Temperature T2

MRS Medical, Skin Temperature T2

STM General Purpose Immersion Probe T3

The FOT Lab Kit's default lookup table is T1. A simple command is
used to change the lookup table. For example, to change the
instrument to operate with table T2, the user sends the following
command: <ESC> T2. Further details of this command are
described in Chapter 4, Page 4-23.

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System Operation

Analog Outputs The FOT Lab Kit includes a 0-10V analog output for each of the four

measurement channels. There is a positive (+) and Negative (−)
screw terminal contact for each channel. Connections should be
made with shielded 22 AWG wire and a circuit impedance of
>1kOhm.

The FOT Lab Kit can be used with LabVIEW sofware after loading
drivers available on www.luxtron.com.

The analog outputs scaling and offset are programmable. These
settings are adjusted using the AS and AO parameter commands.
For a description and examples of how to use these commands
please see the detailed command definitions on pages 4-7 and 4-8.

User Interface The FOT Lab Kit communicates through a standard RS-232 serial

interface. The connection is a 2-wire interface: Transmit, Receive
and Ground which can be connected to a standard PC equipped
with a 65550 or equivalent UART device. The PC host software may
be a standard terminal emulation application such as

ΤΜ

HyperTerminal

or a custom device-control program

communicating through the RS-232 interface.

The user interface is described in detail in Chapter 4 and Chapter 5
of this manual.

NOTE The serial interface is the main conduit through which the FOT

Lab Kit communicates with the user. The instrument communicates at
9,600 bits-per-second (sometimes erroneously referred to as 9,600
Baud). The bit protocol is 8 data bits, one stop bit and no parity (8-N-

1). The instrument does not use a handshaking protocol.

Calibration Basic temperature calibration is performed at the factory, however

to achieve the highest level of accuracy, it will be necessary to
perform a simple calibration to adjust for the type and positioning
of the temperature probe used. Please refer to Appendix A,
“Calibration Procedure’’, for details on performing this calibration.

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System Operation

Temperature
Measurement
Range

The range of temperatures that may be measured by the FOT Lab Kit
is limited by the type of probe used. Under no circumstances
should the maximum temperature rating of a probe be exceeded.
Check documentation of your probe or with a LUXTRON
Applications Engineer to determine the specified temperature limits
of your Fluoroptic® probe.

WAR N IN G Exceeding the maximum temperature rating of the probe may

destroy the probe!

Probes LUXTRON’s Fluoroptic® technology uses fiber optic probes

incorporating patented phosphor compounds encapsulated at the
sensing end of the probe. These probes are immune to EMI and
radio-frequency noise, are much more robust that thermocouples
and are ideally suited for hostile environments.

Temperature data are collected by exciting the probe's phosphor
with a burst of light sent through the fiber optic cable. The decaying
light signal returns through the fiber to the instrument where it is
processed by converting the analog signal into a digital value which
is then converted into a calibrated and corrected temperature. The
measured temperature is reported through the RS-232 interface and
the analog outputs.

Operational Note Whenever a probe is disconnected from the device or from a fiber

optic extension cable always install the provided vinyl cap over the
FOT Lab Kit instrument’s optical port. This prevents random
ambient light from entering the system which would adversely affect
the accuracy of the temperature measurements from the remaining
probes.

If you experience unexpected resets of the device during initial
installation and setup, it is likely that the power supply is
improperly grounded. A code is provided in the startup message
indicating the cause of the most recent reset. This code is found at
the end of the first line of the startup message and may be requested
by your Customer Service representative while assisting you with
your installation. The code may be any one of the following:

(POR) Power On Reset (WDR) Watchd og Timer (BOR) Brown Out Reset

(CXR) Ctrl+X Reset (WKR) Wakeup Res et (CLR) MCLR Reset

Example: “Luxtron Corp. Copyright 2002” (POR)

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System Operation

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4 User Interface Commands

The primary user interface with the FOT Lab Kit is through a
standard RS-232 serial interface. The host may be a standard
terminal emulation application software such as HyperTerminal™ or
a custom device-control program communicating through the RS­232 interface. LUXTRON also offers a Windows-based graphing and
data-acquisition program for PCs called TrueTemp™.

The instrument communicates at 9,600 bits-per-second. The bit
protocol is 8 data bits, one stop bit and no parity (8-N-1). The
instrument does not use a handshaking protocol. The details of the
communication protocol are defined in this chapter and Chapter 5,
“Temperature Data Reporting” .

User interface commands fall into two general categories:

1. Parameter Commands: Two-letter command codes with

required or optional arguments.

2. Action Commands: One-letter character command codes

consisting of the Control key plus one letter key.

For a summary of the Parameter Commands, see Table 4-1 on
page 4-5. For a summary of the Action Commands, see Table 4-2 on
page 4-5.

FOT Lab Kit User’s Manual 4-1

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User Interface Commands

Parameter Commands (Two-Letter)

The Parameter Commands are used to adjust user-selectable
parameters and to query the instrument to report a current
parameter setting.

The Parameter Command code consist of the Escape character
(1Bh) followed by two ASCII characters defining the command with
optional arguments for retrieving information or setting system
parameters. Commands are not case sensitive.

White space (spaces/tabs) is allowed but is ignored except where it
is necessary for separation of arguments.

All commands must be terminated by a carriage-return character CR
(0Dh) optionally followed by a line feed character LF (0Ah).

These parameter commands are used in either of two ways:
information requests or parameter modification.

Information
Requests

This command format consists of the Escape character followed by a
two-letter command followed by a question mark and carriage
return/line feed.

Example Query: <Esc>AA ? <CRLF>

Information Request

Character Hexidecimal

Escape 1Bh

A 41h

A 41h

Space (optional) 20h

?3Fh

Carriage Return 0Dh

Line feed 0Ah

Informational output data packets consist of echoing the command
code in upper case characters followed by an equal sign ( = )
followed by the requested information. The Escape character is not
echoed.

White space is consistently applied with exactly one (1) space
character between each pair of arguments.

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User Interface Commands

Informational output data is always terminated by a carriage-return/
line feed pair (CRLF).

Example Response: AA = INFO

Information Request

Character Hexidecimal

A 41h

A 41h

Space 20h

=3Dh

Space 20h

I--

N--

F--

O--

Carriage Return 0Dh

Line Feed 0Ah

If the command is unrecognized or the command syntax is incorrect
the system responds with the request as typed with the addition of a
question mark '?' followed by a CRLF pair.

The system responds to the information request as described,
although certain exceptions exist; e.g. multi-line responses. Refer to
the descriptions of the individual commands for additional details.

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User Interface Commands

Parameter
Modification

This command format consists of the Escape character followed by a
two-letter command followed by an equal sign ('=') and the new
parameter value(s) and ending with a carriage return/line feed.

These commands provide the mechanism for modification of setup
parameters or for initiation of an event or sequence of events.

Example Command: <Esc>AA = E <CRLF>

Information Request

Character Hexidecimal

Escape 1Bh

A 41h

A 41h

Space (optional) 20h

=3Dh

Space (optional) 20h

E 45h

Carriage Return 0Dh

Line feed 0Ah

If the command is successfully received, parsed and executed, the
new parameter will immediately take effect. There will be no serial­data response from the device.

If the command is unrecognized or the command syntax or
parameter value is incorrect the system responds with the request as
typed with the addition of a question mark '?' followed by a CRLF
pair.

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User Interface Commands

Table 4 -1 Summary Listing of Parameter Commands

Command Code Command Description

AE Analog Output Enable Enable/Disable Analog Outputs

AO Analog Output Set Analog-Output Temperature Offset Factor

AS Analog Scaling Factor Set Analog-Output Temperature Scaling Factor

CC Calibration Correction Enable/Disable Application of Calibration Factors

CT Calibration Set Calibration Temperature for Auto-Calibration Function

DF Data Format Set Serial Data Output Format

DS Data String Capture User Data Sequence

HL High Temperature Limit Set High Temperature Limit (obsolete, no longer supported)

ID Information Display Report Device ID and Current Parameter Settings

LL Low Temperature Limit Set Low Temperature Limit (obsolete, no longer supported)

MU Measurement Update Set Interval Between Temperature Measurement Reports

PS Probe Select Specify Active-Input List

SL Signal Level Report LED Light Source Intensity Level

SM Sample Measurement Set Number of Samples to be Retained Per Measurement

SN Serial Number Report Device's Serial Number

ST STart up Mode Select Startup Mode

SV Save Parameters Save Current User Parameters and Calibration Factors

TU Table Selection Reports the Currently Selected Look-up Table

UN Output Units Specify Output Units of Measure

Table 4 -2

Command Code Command Description

CTRL + A

CTRL + D

CTRL + E

CTRL + F

CTRL + I

CTRL + K

CTRL + Q

CTRL + S

CTRL + T

CTRL + X

Abort (01h) Abort calibration sequence in progress

Disable (04h) Disable remote control of temperature reporting

Enable (05h) Enable remote control of temperature reporting

Flush (06h) Flush the measurement buffer

Initiate (09h) Begin data sampling

Calibrate (0Bh) Begin auto-calibration sequence

Report (11h) Report the most recent measurement / enable serial output

Stop (13h) Disable serial data output

Standby (14h) Enter standby mode

Reset (18h) Reset the instrument

Summary Listing of Action Commands

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User Interface Commands

AE Analog Output Activation

Enable all analog output channels which are attached to active
inputs. For each input channel that has been enabled using the PS
command, enable the corresponding analog output channel.

Information Request:

Syntax: <Esc>AE ? <CRLF>
Response: AE = ENABLED | DISABLED

Command Parameters:

Syntax: <Esc>AE = status <CRLF>
Range:

ENABLE Enable the analog outputs for all active inputs
DISABLE Disable all analog outputs

Examples: <Esc>AE = ENABLE <CRLF>

<Esc>AE = E <CRLF>
<Esc>AE = Disable <CRLF>
<Esc>AE = D <CRLF>

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AO Analog Output Offset

Set the temperature offset (minimum reported temperature) for
analog output voltage. Along with the Analog Scaling Factor (AS
command) the AO command sets the parameters for the analog
output voltage range.

The native range for analog output channels is 0.00 to 10.00V. The
analog temperature offset is expressed in degrees (using the
specified system units). By adjusting the temperature offset it is
possible to set the floor of the analog output range i.e. the
temperature corresponding to 0.00V output.

V

= (AS/1000) * (T

out

Where:

AO = AnalogOffset = Minimum analog output voltage

corresponding to minimum reported temperature

AS = Analog Scaling Factor, mV/deg

(see AS command, page 4-8)

V

out

T

measured

= Analog output voltage
= Temperature measured at input

User Interface Commands

measured

- AO)

The default temperature offset value is equivalent to the minimum
temperature supported by the device.

See examples in description of AS command, page 4-8.

Information Request:

Syntax: <Esc>AO ? <CRLF>
Response: AO = offset in degrees

o

Example: AO = -30

C

Command Parameters:

Syntax: <Esc>AO = offset <CRLF>
Range:

This value is not range checked. Use care in selection of parameter
value.

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User Interface Commands

AS Analog Output Scaling

Set the scaling factor for analog output voltage. Along with the
Analog Offset (AO command) the AS command sets the parameters
for the analog output voltage range.

The native range for analog output channels is 0.00 to 10.00V. The
scaling factor is expressed in millivolts per degree. By adjusting the
scaling factor it is possible to adjust the working range of the analog
outputs as they apply to the input temperature range.

V

= (AS/1000) * (T

out

Where:

AO = AnalogOffset = Minimum analog output voltage

corresponding to min. reported temperature
(see AO command, page 4-7)

AS = Analog Scaling Factor (in millivolt per degree,

mV/deg)

V

out

T

measured

= Analog output voltage
= Temperature measured at input

measured

- AO)

Minimum Input
Temperature

o

-30

C330

Maximum Input
Temperature

o

C 27.7778mV / oC-30oC 0V 10.0V 10.0V

The default scaling factor value is based upon the temperature
range supported by the device.

Example using standard-configuration defaults:

VOutput Scaling
Factor

Temperature
Offset

Minimum
Output Voltage

Maximum
Output Voltage

Output
Voltage Range

Information Request:

Syntax: <Esc>AS ? <CRLF>
Response: AS = scaling factor in mV / degree

Example: AS = 27.7778

Parameter Modification:

Syntax: <Esc>AS = factor<CRLF>

Range:
This value is not range checked. Use care in selection of parameter
value.

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User Interface Commands

Example using a temperature range of 0.00oC to 200oC:

Minimum Input
Temperature

o

C 200 oC 50 mV / oC0oC 0V 10.0V 10.0V

0

Maximum Input
Temperature

VOutput
Scaling Factor

0V = (50mV /

Temperature
Offset

o

C * 1V/1000mV) * (0oC - 0oC)

Minimum
Output Voltage

Maximum
Output Voltage

5V = (50mV / oC * 1V/1000mV) * (100oC - 0oC)

10V = (50mV / oC * 1V/1000mV) * (200oC - 0oC)

Output Voltage
Range

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User Interface Commands

CC Calibration-Correction

The CC command is used to Enable or Disable application of the
Calibration-Correction Factors. Each installed temperature input
channel has associated calibration factors which are applied to the
measured temperature before it is reported.

These factors are set to typical values at the factory but must be
fine-tuned as needed to compensate for differences in probe type,
probe length and signal attenuation factors such as positioning and
optical fiber bend-radius inherent in your particular installation.

Please refer to Appendix A, “Calibration Procedure” for additional
details.

Information Request:

Command Syntax: <Esc>CC? <CRLF>

Response Syntax: CC = info

ENABLE Application of the Calibration-Correction Factors is enabled.
DISABLE Application of the Calibration-Correction Factors is disabled.

Parameter Modification:

Syntax: <Esc>CC=status <CRLF>

Range:

ENABLE (default) Enables application of Calibration-Correction Factors
DISABLE Disables application of Calibration-Correction Factors

Example: <Esc>CC = ENABLE <CRLF>

<Esc>CC = E <CRLF>

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CT Calibration Temperature

The CT command is used to set the calibration reference

temperature used during the automatic calibration-correction

procedure.

Please refer to Appendix A, “Calibration Procedure” for additional

details.

Information Request:

Syntax: <Esc>CT ? <CRLF>
Response: CT = caltemp

Example: CT = 37.00 C

Parameter Modification:

Syntax: CT = caltemp <CRLF>
Range: caltemp New calibration reference temperature

The new reference temperature is specified in degrees and
hundredths of a degree within the working range of the device.
Temperature units are assumed to be the units previously set
using the UN command.

User Interface Commands

Value input is in "nn.nn" format. Do not include the units. If
the reference temperature entered is of an ambiguous format
e.g. "40" or "40.1" the system will correctly interpret the input
as "40.00" and "40.10" respectively. It is recommended,
however that values be entered in the standard format.

Example: <Esc>CT = 95.50 <CRLF>

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User Interface Commands

DF Data Format

The DF command sets the serial-interface temperature output
format, either full or abbreviated.

The format selected depends upon the use to which the captured
data will be put. For visual clarity the abbreviated format is
recommended for most circumstances.

Information Request:

Syntax: <ESC>DF ? <CRLF>

Response: DF = format

Parameter Modification:

Syntax: DR = format <CRLF>

Range: FULL

FULL

Output is formatted for all channels without regard to the
number of active channels.

Returns the current data reporting format.

Examples:
All four input channels are active.

" 1: 20.42 C 2: 22.75 C 3: 21.25 C 4: 19.97 C"

Input channels 1 and 2 are active.

" 1: 20.42 C 2: 22.75 C 3: 4: "

Input channels 1 and 3 are active.

" 1: 20.42 C 2: 3: 22.75 C 4: "

ABBR

Output is compacted to display data for only active input
channels.

All four input channels are active.

" 1: 20.42 C 2: 22.75 C 3: 21.25 C 4: 19.97 C"

Input channels 1 and 2 are active.

" 1: 20.42 C 2: 22.75 C"

Input channels 1 and 3 are active.

" 1: 20.42 C 3: 21.25 C"

4-12 FOT Lab Kit User’s Manual

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DS Display String

The DS command may be used by the OEM customer to enter a line

of text to be displayed on startup. This text will also be displayed as

part of the parameter dump (see example in description of ID

command, page 4-14).

Information Request:

Syntax: <Esc>DS ? <CRLF>
Response: DS = OEM display string

Example: DS = XYZ Corp. Model SuperPro 5000

Parameter Modification:

Syntax: <Esc>DS = OEM display string <CRLF>
Range: Display string may be from 1 to 31 characters.

NOTE Characters must be standard ASCII printing characters. If the first

character after the '=' sign is a Space (20h) it will be discarded.

User Interface Commands

.

To prevent display of this string enter an empty string i.e. press
Enter key immediately after the Equal sign ('='): <Esc>DS

=<CR>

Example Sign-On Message:

LUXTRON CORP.

Copyright 2002
M600 Fluoroptic Thermometer, Software Version 1.00
Serial # 12345
XYZ Corp. Model SuperPro 5000

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User Interface Commands

ID Identification Query

The ID command is used to report the device's identification string,
firmware version, device serial number and current operating
parameters. In essence this command combines the information
requests of most other system commands into an inclusive report.

The DS and SN command data are incorporated into the header
information. The SL command values, being dynamic are not
included in the report.

Information Request:

Syntax: <Esc>ID ? <CRLF>

Response: ID = info

Example:

LUXTRON CORP. Copyright 2002

M600 Fluoroptic Thermometer, Software Version 1.00

Serial # 12345

XYZ Corp. Model SuperPro 5000

PS = 1,2,3,4

SM = 8

MU = 1 S

UN = CELSIUS

DF = ABBR

AE = ENABLE

AS = 27.7778

AO = -30.00 C

CC = ENABLE|

CT = 75.00 C

MS = DISABLE

ST = ENABLE

Please refer to the descriptions of the individual commands related
to the reported parameters for details on interpreting the
information.

Parameter Modification:

n/a

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User Interface Commands

MU Report/Set Measurement Reporting Interval

The MU command specifies the interval between measurement

reports. Another way of looking at it is that 1 / MU = reporting

frequency.

Information Request:

Syntax: <Esc>MU ? <CRLF>
Response: MU = interval

Example: MU = 4.5 S

Parameter Modification:

Syntax: <Esc>MU = interval <CRLF>
Range: C or 'Continuous

Continuous mode reporting sets the reporting
interval to the minimum practical value i.e. the
sample interval times the number of active
channels. Since the sample rate is 4 Hz the
sample interval is then 250 milliseconds and
the reporting interval will be 250mS * channels.

Examples:

If 4 channels are active MU=C would yield 250mS * 4 = 1.0 S.
If 2 channels are active MU=C would yield 250mS * 2 = 0.5 S.

0.25 - 600 S Interval may be specified in seconds
1 - 10 M Interval may also be specified in minutes

The minimum interval corresponds to the sample rate of 0.25

Seconds (4Hz).

The maximum interval is limited by the width of the timer (16 bits).

Examples: <ESC> MU = C <CRLF>

<ESC> MU = 25 <CRLF>
<ESC> MU = IM <CRLF>

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User Interface Commands

PS Active Input Channels

The PS (Probe Select) command specifies which input channels are
to be activated.

It is recommended that unused inputs be disabled to provide the
optimum number of samples per report for the active channels.

The number of active channels has a direct effect on the
interpretation of the MU command parameter value 'C' i.e.
continuous reporting.

Information Request:

Syntax: <Esc>PS ? <CRLF>

Response: PS = active channel list

Example: PS = 1,2,3,4

Parameter Modification:

Syntax: <Esc>PS = channel list <CRLF>

Range: Any combination of installed channels may

be specified, in any order with the channel
numbers separated by commas. Additional
spaces may be used but are ignored if
present.

Examples: PS = 1, 2, 3, 4

PS = 2, 4
PS = 3, 1, 2

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SL Signal Level

The SL command reports the relative strength of the signal arriving

at the photodetector. The signal is the intensity of light returned

from the probe tip and is reported as a percentage of maximum.

This information is used primarily during probe testing and helps to

determine whether the probe is functioning efficiently.

Information Request:

Syntax: <Esc>SL ? <CRLF>
Response: SL = signal

Example:

1: 1.81 % 2: 2.66 % 3: 5.10 % 4: 3.24 %

User Interface Commands

The signal data are returned in the same general
format as a standard temperature report.

Parameter Modification:

n/a

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User Interface Commands

SM Samples per Measurement

The SM command is used to specify the number of ADC samples
that will be averaged to create each measurement reported. Fewer
samples mean faster response, more samples mean greater stability.

The FOT Lab Kit’s internal timing is based upon a fixed 4Hz
sampling rate. The number of samples per second per channel is
4Hz divided by the number of active channels.

The Samples-per-Measurement command specifies the number of
samples retained per channel which are then averaged to generate
the temperature report. To put it another way, the specified number
of samples will be averaged and used to create the temperature
value to be reported.

NOTE Please note also that the measurement update rate (MU

command) has an impact upon averaging in that it determines the
degree to which averaging occurs across measurements.

Examples: In the first example only one input channel is active so
all samples taken are for that channel. Each report (except the first)
will include 8 samples. In the second example four channels are
active so the samples taken are distributed evenly among the active
channels. Each report (except the first) will then include 2 samples
per channel.

4-18 FOT Lab Kit User’s Manual

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Figure 4-1 Sampling Report

Exam p le: On e inp ut channel is active, MU = 1 Secon d, SM = 8 Sam ples Per Repo rt

User Interface Commands

Seconds

Report 1
Report 2
Report 3
Report 4
Report 5
Report 6
Report 7

Sampling Rate
4 Per Second

Seconds

Report 1
Report 2
Report 3
Report 4
Report 5
Report 6
Report 7

1 2 3 4 5 6

Example: Four inp ut channel are active, M U = 1 Seco nd, SM = 2 Sam p les Per Repo rt

1 2 3 4 5 6

Sampling Rate
4 Per Second

C h a n n e l 1 C h a n ne l 2 C h a nn e l 3 C h a n n e l 4

Information Request:

Syntax: <Esc>SM ? <CRLF>
Response: SM = samples

Example: SM = 6

(Six samples averaged into each reported value)

Parameter Modification:

Syntax: <Esc>SM = samples <CRLF>
Range: 1 through 50

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User Interface Commands

SN Serial Number Query

The SN command is used to report the unit's internal serial number.
A copy of this number may or may not also be affixed to the unit's
case.

Information Request:

Syntax: <Esc>SN ? <CRLF>

Response: SN = sernum

Example: SN = 123456

In the unlikely event that the serial number saved in NvRam has
been corrupted the message "SN = Undefined" will be returned.

Parameter Modification
n/a

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ST Startup Mode

The ST command is used to select the "startup mode" indicating to

the device whether to power up into Standard mode or into

Standby mode.

In Standard mode the input circuits are enabled and the device

begins reporting temperatures as soon as data are ready.

In Standby mode the input circuits are idle i.e. samples are not

being taken and no data reports will be generated. In this mode the

user must explicitly enter Standard mode using the CTRL+R

command to enable data sampling and reporting.

NOTE Do not issue the CTRL+R command for at least 30 seconds after

power-up which will allow the device time to complete its startup

sequence.

See also the descriptions of the CTRL+T and CTRL+R commands.

User Interface Commands

Information Request:

Syntax: <ESC>ST ? <CRLF>
Response: ST = mode

Examples:

ST = ENABLE Temperature reporting starts automatically.
ST = DISABLE Reporting must be started manually.
ST = E Same as ST = Enable

Parameter Modification:

Syntax: <ESC>ST = mode
Range: ENABLE Begin reporting temperatures on power up.

DISABLE On startup wait for user to enable

temperature reports.

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User Interface Commands

SV Save

The SV command is used to copy the currently active user
parameter values and input-channel calibration factors to non­volatile (NvRam) storage for use in subsequent sessions.

When user parameters are changed or when the instrument is
calibrated the resulting values are active only for the current session
i.e. until the instrument is reset using the CTRL+X command or
until the instrument is powered down. This allows you to
experiment with different parameter combinations without affecting
the stored parameters. If you wish to save the new calibration
factors and user parameters for subsequent sessions you must
explicitly save them using the SV command.

Information Request:

n/a

Parameter Modification:

Syntax: <Esc>SV <CRLF>

Response: none

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TU Table Selection

The TU query reports the currently selected "tau to temperature"

lookup table. The FOT Lab Kit includes three such tables for use

with different probe types.

Information Request:

Syntax: <ESC> TU ? <CRLF>
Response: Using Table: 1

Parameter Modification:

Syntax: <ESC> T1 <CRLF>
Response: Set T1
Syntax: <ESC> T2 <CRLF>
Response: Set T2
Syntax: <ESC> T3 <CRLF>
Response: Set T3

User Interface Commands

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User Interface Commands

UN Unit of Measure

The UN command is used to report or select the serial-interface data
output units. Three units are currently supported: Kelvin, Celsius
and Fahrenheit. The analog outputs are mapped directly from the
serial output units.

NOTE For legacy reasons it is important to select the output units first

before adjusting any other system parameters. Units should not be
changed after other parameters are set or after calibration has been
performed. If you change units the device will need to be recalibrated.

Information Request:

Syntax: <Esc>UN ? <CRLF>

Response: UN = units

Reports the current units/data type being transmitted through

the user interface.

CELSIUS Temperature in degrees Celsius

KELVIN Temperature in degrees Kelvin

FAHRENHEIT Temperature in degrees Fahrenheit

Parameter Modification:

Syntax: <Esc>UN = units

Range: CELSIUS

KELVIN
FAHRENHEIT

Examples:<Esc>UN = KELVIN

<Esc>UN = K

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Action Commands (One-Letter)

Several commands which perform a simple function without the

need of parameter data from the user are implemented as single-

character commands. These commands consist of holding down

the Control key (CTRL) and pressing one additional key. See the

Summary of Commands below.

These commands are used to enable or disable an operation,

initiate or terminate an event etc. If the command is successfully

received and executed the character is echoed back.

NOTE Many of these characters will not print through a terminal

emulation application or may print as semi-graphic or garbage

characters so it is sometimes difficult to determine whether the device

has responded properly simply by looking. This, of course is not a

problem when the device is under the control of a custom control

program since in that case the character is not displayed, but is simply

recognized as just another number.

User Interface Commands

Modes of
Operation

The FOT Lab Kit user interface includes eleven (11) one-letter

Action Commands that instruct the instrument to perform a

function or switch mode. Conceptually, there are four "modes"

defined for the FOT Lab Kit device. A summary listing of these

commands in Table 4-2 on page 4-5.

The FOT Lab Kit has four different operation modes. The Active

Commands are used to switch from one mode to another, or to

initiate specific events while the FOT Lab Kit is in a particular

operational mode. The four modes are Standard, Remote control,

Stand by, and Calibration.

Standard Mode

In Standard mode temperatures are reported periodically
based upon the interval set using the MU command.

Remote Control Mode

In Remote Control mode temperatures are reported only when
the PC host requests them.

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User Interface Commands

Standby Mode

In Standby mode sampling and temperature reporting are
disabled and the device simply waits for additional commands
from the PC host.

Calibration Mode

In Calibration mode sampling and temperature calculation are
still active but the temperatures, rather than being reported are
used to calculate new calibration factors.

Of the one-letter codes described below some are valid only in
certain operational modes or have different functionality in different
modes. For this reason the sequence in which these commands are
entered is significant. Please read the command descriptions
carefully to obtain optimal results and avoid confusion.

Example of a typical Remote Control mode session:

■ Place device into Standby mode using CTRL+T.

■ Place device into Remote Control mode using CTRL+E.

■ Send the Run command CTRL+R.

■ Send the Initiate Measurement command CTRL+I. Wait for

CTRL+I to be echoed.

■ Send the Report Measurement command CTRL+Q. The

report will be transmitted.

■ Repeat steps 4 and 5 as desired.

■ Return to from Remote Control mode to Standard mode using

CTRL+D.

■ Re-enable periodic temperature reporting using CTRL+R.

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CTRL+A Abort Calibration Sequence in Progress

When a calibration sequence has been initiated using the CTRL+K

command the device will begin taking data from which to calculate

the new calibration factors. The length of a calibration period is

typically anywhere from 5 to 40 seconds. If the input data are

invalid or cannot be properly integrated into the calibration

algorithm the instrument will automatically abort the sequence after

one minute. You may also abort the calibration sequence at any

time using the CTRL+A command. If a calibration sequence is

successfully aborted the CTRL+A character will be echoed back to

the host, else there is no response.

NOTE If the calibration sequence is aborted the previous calibration

factors are not restored and the system will be left in an indeterminate

state. You must then perform a successful calibration before using the

device to capture calibrated temperature data. You may still operate

the device in uncalibrated mode (CC = DISABLE command)

User Interface Commands

CTRL+D Exit Remote Control Mode

This command is valid ONLY when the device is in Remote Control

mode (CTRL+E command).

Disable the Remote Control mode of temperature reporting and

return to Standard Mode. If command is successfully executed the

CTRL+D character will be echoed back to the host, else a question

mark ('?') will be returned.

CTRL+E Enable Remote Control Mode

This command is valid ONLY when the device is in Standby mode

(CTRL+T command).

Exit Standby mode and enable Remote Control mode temperature

reporting. In Remote Control mode temperature reports are

created and transmitted only when the PC host requests them. If

command is successfully executed the CTRL+E character will be

echoed back to the host, else a question mark ('?') will be returned.

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User Interface Commands

CTRL+F Flush the Measurement Buffer

Discard any data currently stored in the measurement buffer. Use
this command when you want to discard old data to prevent it from
affecting new data. For example you may have just installed a new
probe and want to discard any garbage data still in the input buffer.
Old data will, of course cycle out on its own but may take several
seconds depending upon the combination of system parameters
you have selected. This command simply speeds up that process.
The CTRL+F character will be echoed back to the host.

CTRL+I Create a Data Report

This command is valid ONLY when the device is in Remote Control
mode (CTRL+E command).

The CTRL+I command initiates data sampling and the creation of
one temperature report. When the report is ready the device will
echo the CTRL+I character. You may then request the report be
transmitted using the CTRL+Q command.

CTRL+K Initiate Auto-Calibration Sequence

This command is valid ONLY when the device is in Standard mode.

The CTRL+K command invokes the auto-calibration sequence for
all active inputs. When the sequence is complete the device will
report the status of the operation as shown with the status indicator
immediately following the colon (':') and the calibration
temperature. Please see Appendix A, “Calibration Procedure” for
further details.

1:C 348.15 K 2:C 348.15 K 3:C 348.15 K 4:C 348.15 K

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CTRL+Q Report the Most Recent Measurement

When in Remote Control mode periodic reporting of temperature

through the serial interface is disabled even though sampling and

creation of temperature reports can be invoked as background tasks

(CTRL+I command). The CTRL+Q command instructs the device

to report the most recent measurement created for each active

input. The format of the report is exactly the same as when in

automatic-reporting mode except that it is preceded by the echo of

the CTRL+Q character. Under normal circumstances the user

would alternate between CTRL+I (create report) and CTRL+Q

(transmit report). If you transmit CTRL+Q twice without an

intervening CTRL+I, you will receive a copy of the old report

created by the most recent CTRL+I command.

When used in Standard mode the CTRL+Q command simply

enables RS-232 serial data output previously inhibited by the

CTRL+S command.

User Interface Commands

CTRL+R Exit Standby Mode / Run

This command is valid ONLY when the device is in Standby mode

(CTRL+T command) or Remote Control mode (CTRL+E

command).

When in Standby mode CTRL+R instructs the device to return to

Standard-mode operation.

When in Remote Control mode CTRL+R enables, but does not

initiate data sampling.

If command is successfully executed the CTRL+R character will be

echoed back to the host, else a question mark ('?') will be returned.

CTRL+S Disable Serial Data Output

This command is valid ONLY when the device is in Standard mode.

Use CTRL+S to temporarily disable periodic reporting of

temperature data. A common reason for doing this is to prevent the

data you are looking at from scrolling off the screen. Use CTRL+Q

to restart periodic reporting.

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User Interface Commands

CTRL+T Enter Standby Mode

This command is valid ONLY when the device is in Standard mode
(CTRL+R command) or Remote Control mode (CTRL+E
command).

The CTRL+T command causes the device to enter Standby mode (if
not already in Standby). Standby mode can be thought of as a low­power mode in that the lamps are turned off and temperature
reporting disabled. If command is successfully executed the
CTRL+T character will be echoed back to the host, else a question
mark ('?') will be returned.

CTRL+X Reset the Instrument

The CTRL+X command is used to perform a software reset of the
FOT Lab Kit device. This software reset is exactly equivalent to
cycling power to the unit.

All parameters will be loaded from NvRam exactly as they are on
power up.

If the parameters in any section of NvRam have been corrupted,
factory defaults will be loaded for that section and a message will be
displayed informing the user which section(s) have received the
factory default values.

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5 Temperature Data

Reporting

RS-232 Serial Interface Data Format

General Format
Specification

Temperature data are reported for each active input channel. The

temperature units are selected using the UN command. The format

of the report is selected using the DF command.

The general format is to display the channel number followed by

the temperature measurement for the channel followed by the units

designator: 1: 245.71 K

This general format is followed for each input channel from lowest

to highest, concatenating the data and presenting it on a single

output line.

■ The data for each channel are presented in a fixed-length

format.

■ Each output line is terminated by a carriage return / linefeed

pair.

■ There are two basic formats for serial output: FULL and

ABBRIEVIATED. This format is selected using the DF (Data
Format) command.

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Temperature Data Reporting

_

The following is an exact breakdown in both ASCII and hexidecimal
of a report where input channels 1 and 2 are active and DF = ABBR.
Space characters are replaced by the underscore character '_' for
visual clarity.

_ 1 : _ _ 2 2 4 . 3 9 _ C _ _ 2 : _ _ 2 2 4 . 5 1 _ C

20 20 31 3A 20 20 32 32 34 2E 33 39 20 43 20 20 32 3A 20 20 32 32 34 2E 35 31 20 43 0D 0A

1. The first two characters on the line are spaces.

2. The next character is the input channel number followed by a

colon and one space.

3. The temperature value follows which is four places to the left

of the decimal, the decimal point and two places to the right of
the decimal. The value is right-justified with leading spaces as
necessary.

4. The temperature is followed by one space and the units

designator.

5. Items 1 - 4 are repeated for succeeding channels.

6. If the temperature units are Celsius or Fahrenheit the

temperature may be below 0.00, in which case the minus
character ('-') is displayed as the first digit of the channel's
temperature value (e.g.__1:_-_41.50_C).

7.

The line is terminated by the carriage-return / linefeed pair.

Example showing a report line with all four channels active.

1: 224.39 C2: 224.51 C3: 224.22 C4: 224.19 C

Example showing a report line with channels 1 and 2 active, then 1,
3 and 4 active with DF = FULL.

1: 224.39 C2: 224.51 C3: 4:

1: 224.39 C2: 3: 224.22 C4: 224.19 C

Example showing a report line with channels 1 and 2 active and DF
= ABBR.

1: 224.39 C 2: 224.51 C

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Temperature Data Reporting

Error Reporting The FOT Lab Kit device has a very simple error reporting

mechanism. If a problem is detected the letters "PE" (Probe Error)

are inserted into the serial data stream following the data for the

affected channel(s).

This error could be caused by a number of factors including, but not

limited to:

1. Probe not attached to input

2. Improper probe type

3. Damaged probe

4. Input channel is not properly calibrated

5. Temperature of target is outside the device's measurement

range

Analog Output
Data

6. One or more inappropriate parameter settings

7. Failure of the capture hardware

When an error is detected on a given input channel the format

includes the "PE" message as in the following example showing an

error on channel 2:

1: 224.39 C 2: 224.51PE 3: 224.22 C 4: 224.19 C

The FOT Lab Kit includes a 0-10 volt analog output for each

installed input channel. The analog outputs may be enabled and

disabled using the AE command. The output voltage may be scaled

using the AS and AO commands. Using these two commands you

may scale the analog output to the working temperature range of

your application.

When the instrument is in Standby mode the analog outputs are set

to 0.00V. In Standard mode with analog outputs enabled (AE

command) the outputs will track the measured temperature based

upon the parameters set through the AS and AO commands. By

properly scaling the outputs you can obtain optimal resolution

throughout the selected temperature range.

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Temperature Data Reporting

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A Calibration Procedure

Digital Temperature Output Calibration Procedure

A curve-fitted temperature calculation algorithm is used within the

system firmware to provide calibrated temperature output.

Although the user need not be concerned with the temperature

calculation algorithm there are certain physical factors encountered

during the system installation process which can affect the reported

temperature.

■ Type of temperature probe used. The probes used with the

FOT Lab Kit device are LUXTRON Fluoroptic® probes. These
probes are available in a variety of lengths and diameters with
varying optical properties depending upon the type of optical
fibers, lenses and filters used.

■ The bend radius of the optical fiber connecting the probe to

the device. Optical fiber is rated for a minimum bend radius
(see probe documentation). Within its specified working
range the actual bend radius of the fiber can affect signal
attenuation.

■ Proximity of the probe tip to the temperature source

(immersion is strongly recommended).

■ The degree to which the temperature source (liquid, air, etc) is

of a homogeneous temperature.

■ Ambient temperature surrounding the device. The FOT Lab

Kit is nearly impervious to changes in ambient temperature
within its working ambient range but care should be used
when working at or near the limits of this range.

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The FOT Lab Kit provides a set of calibration-correction factors for
each input channel physically installed in the device. These factors
are set to a nominal value at the factory before shipment to the
customer. The items listed above, however may affect the
calibration of a device within its specific working environment.

For this reason the user must adjust these calibration factors as
needed during the installation procedure to ensure accurate
temperature measurements. The calibration procedure is semi­automatic and should be straightforward and nearly foolproof if the
instructions are followed carefully. Please refer also to the
descriptions of the CTRL+K (Kalibrate) CC (Calibration Correction)
and CT (Calibration Temperature) commands in Chapter 4, “User
Interface Commands’’.

Calibration of the device should be verified on a regular schedule.

If you are unable to successfully calibrate the device please contact
LUXTRON Technical Support.

Automatic
Calibration
Correction

Automatic calibration correction for each channel is invoked using
the CTRL+K command. When invoked this functionality captures
several seconds' of data samples and compares the average of these
samples to the calibration reference temperature (please refer to the
description of the CT command, page 4-11 ).

Calibration Options

1. Self-Calibration – If the user has a stable temperature bath (i.e.

o

ice water for 0

C), they can calibrate the instrument

themselves using the instructions below.

NOTE For best performance the user should calibrate with a stable

temperature bath at the midpoint of the measurement range. For
example, if the user’s temperature range is 100
calibration point would require a stable temperature bath at 125
calibrate the FOT instrument to achieve the best accuracy possible.

o

C to 150oC, the ideal

o

C to

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2.

Luxtron Calibration – Luxtron offers an initial and annual
service to provide calibration of instruments, extensions and
probes for customers who require a “Certificate of Calibration”
with calibration temperatures traceable to the National
Institute of Standards and Technology (NIST) temperature
standards. Luxtron can perform standard calibrations from –
25oC to 295oC, higher and lower temperatures are also
available. Please refer to our Calibration page at
www.luxtron.com/calibration for more information on this
service.

Multi-temperature
Calibration

Each fiber optic channel of the FOT instrument can be calibrated at

a different temperature, if required, for applications where the user

is measuring locations with distinctly different temperature ranges.

A two temperature range example application is if one needed to

measure water temperature from –10

from 100oC to 200oC. In this application, the user may want to

calibrate channel 1 at 35oC for the water temperature measurement

and calibrate channel 2 at 150oC for the oil temperature

measurement. This multi-temperature calibration can be

performed for all channels on the instrument. Instructions are

outlined below.

Calibration Instructions

For calibration, the instrument must be connected through a

computer with HyperTerminal® or Luxtron’s TrueTemp software.

All commands are for terminal software.

o

C to 60oC and an oil system

One Temperature
Calibration

1. Connect the extensions and probes to the appropriate

channels .

2. Insert the probe or probes into the stable temperature bath,

verified by a reliable, independent temperature measurement
device.

3. Connect the FOT instrument to the computer and start the

appropriate software.

4. Power up the FOT instrument.

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5.

Set the temperature units using the command <ESC> UN =
“units” ENTER, where “units” is Celsius, Kelvin, or Fahrenheit.
Depending on your FOT instrument, some of these units will
not be available.

6. Set the calibration temperature to match the actual

temperature of the temperature bath using the comment
<ESC> CT = nn.nn ENTER, where “nn.nn” is the temperature
in degrees and hundredths of degrees in the temperature units
previously specified using the UN command.

7. Disable the calibrated output using the command <ESC>

CC=D ENTER.

8. Allow the probe several minutes (5 to 15 minutes) to achieve

thermal equilibrium with the temperature bath.

9. Start the automatic calibration sequence using the CTRL+K

command. You may abort the procedure anytime by pressing
CTRL+A command.

10. After a few seconds you will receive the following output,

depending on the results of the calibration.

a. 1: C 100.00F 2:C 100.00F – This indicates the calibration
was successful on channels 1 and 2.

b. 1: U 100.00F 2: C 100.00F – This indicates there was an
unstable temperature variation on channel 1 but channel 2 was
successful.

c. 1: E 100.00F 2:C 100.00F – This indicates there was an
error on channel 1 but channel 2 was successful. The error is
due to the following two issues.

i. Measured temperature differs from specified calibration
temperature by more than eight degrees.

ii. The calibration coefficient required is greater than 50%
of the measured temperature.

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After an "E" error, the FOT instrument will disable the channel with

the error. To re-enable the channel, the user needs to disable the

calibration with the command CC=D and then reselect the disabled

channel and restart the calibration.

11. If all four channels are reading correctly, then save the setting

with the following command <ESC> SV ENTER.

Multi-Temperature
Calibration

If required, each channel of the instrument can be calibrated at a

different temperature to achieve the highest accuracy over separate

temperature ranges. The instructions below show how to calibrate

a four-channel instrument with Channels 1 and 2 calibrated at 60oC

and Channels 3 and 4 calibrated at 100oC.

1. Connect the extensions and probes to the appropriate

channels.

2. Insert the probe or probes into the stable temperature bath,

verified by a reliable, independent temperature measurement
device.

3. Connect the instrument to the computer and start the

appropriate software.

4. Power up the instrument.

5. Set the temperature units using the command <ESC> UN =

“units” ENTER, where “units” is Celsius, Kelvin, or Fahrenheit.
Depending on your FOT instrument, some of these units will
not be available.

6. Disable channels 3 and 4 and enable channels 1 and 2 with the

command <ESC> PS=1,2 ENTER.

7. After channels 3 and 4 are disabled, you can calibrate channel 1

and 2 at 60oC with the command <ESC> CT=60 ENTER.

8. Then, disable the calibration <ESC> CC=D ENTER.

9. Place the probes attached to channels 1 and 2 in the 60

o

C
temperature bath and wait until the temperature is stable (5 to
15 minutes).

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10.

Start the automatic calibration sequence using the CTRL+K
command. You may abort the procedure anytime by pressing
CTRL+A command.

11. Wait for a few seconds for the calibration to complete, then

review the output data for errors (see above).

12. After the unit has finished the calibration of channels 1 and 2,

then calibrate channels 3 and 4 with the following sequence.

13. Disable channels 1 and 2 and enable 3 and 4 with the following

command <ESC> PS=3,4 ENTER.

14. After you have enabled channels 3 and 4, disable the

calibration again with the command <ESC> CC=D ENTER.

15. Place the probes attached to channels 3 and 4 in the 100

o

C
temperature bath and wait until the temperature is stable (5 to
15 minutes).

16. Start the automatic calibration sequence using the CTRL+K

command. You may abort the procedure anytime by pressing
CTRL+A command.

17. Wait for a few seconds for the calibration to complete, then

review the output data for errors (see above).

18. After the calibration of channels 3 and 4 is complete, enable all

four channels at once with the command <ESC> PS=1,2,3,4
ENTER.

19. If all four channels are reading correctly, then save the setting

with the following command <ESC> SV ENTER.

If there are no errors the new correction factors have been
calculated and will take effect immediately.

NOTES Do not issue any commands to the device for at least 10 seconds

after the calibration routine has finished. This allows the device time to
reinitialize the data-sampling sequence.

If an error is encountered during the procedure and error message
will be displayed for the failed channel(s). In this case revisit all
steps of the setup and calibration to determine the cause of the
error and run the procedure again.

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Error Codes:

CCalibration Complete. No errors.
UUnstable Temperature error. Temperature variation

too great. Could not get a stable reading.

EError. General error probably caused by one of the

following:

a. Measured temperature differs from specified

calibration temperature by more than eight (8)
degrees.

b. The calibration coefficient required is greater that 50%

of the measured temperature.

Example A: Success on all channels:

1:C 348.15 K 2:C 348.15 K 3:C 348.15 K 4:C 348.15 K

Example B: Unstable on channel 1 and general error on channel 2:

1:U 348.15 K 2:E 348.15 K 3:C 348.15 K 4:C 348.15 K

NOTE If a calibration error 'E' occurs on any input channel that input

will be disabled to prevent the uncalibrated readings that would be
reported for that channel from being interpreted as calibrated data. To
attempt recalibration it will be necessary to re-enable the failed
input(s). For example, if Channel 2 is reported to have an error as
shown in Example B (above), then Channel 2 will be disabled. The user
must disable calibration (CC=D) and reselect Channel 2 (and any other
desired channels) to be active (PS=1,2,3,4).Note that the m600 will
again operate in uncalibrated mode.. You may then re-enable the
desired channels (see PS command, page 4-16 ) and restart the
calibration sequence.

Analog Temperature Output Calibration

The FOT Lab Kit includes a 0-10V analog output for each installed
input. Because the output voltage is tied directly to the digital
temperature value it is unnecessary to calibrate the analog outputs.

The analog outputs may be scaled for the temperature range and
voltage range desired. Please refer to the descriptions of the AS
command, page 4-8 and AO command, page 4-7 for details.

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B Warranty and Service

Limited Warranty

LUXTRON Corporation warrants each Fluoroptic® Thermometer to
be free from defects in material and workmanship under normal use
and service for the period of one year from date of shipment. This
warranty extends only to the original purchaser. It does not apply
to fuses, lamps, or probes, nor any products or parts that have been
subject to misuse, neglect, accident or abnormal conditions of
operation.

In the event of failure of the instrument covered by this warranty,
LUXTRON Corporation will repair and calibrate the instrument if it
is returned to LUXTRON within one year of the original shipment,
provided LUXTRON's examination discloses that the product is
defective. LUXTRON may, at it's option, replace the unit in lieu of
repair. The repairs or replacement will be made without charge if
the instrument is returned within one year of the original shipment
date.

If the fault has been caused by misuse, neglect, accident or
abnormal conditions of operation, repairs will be billed at current
service rates. In such case, a purchase order number is required
prior to the start of any repair. If requested, an estimate of the
service charges will be given prior to the start of any repair.

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY,
FITNESS, OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE.

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LUXTRON CORPORATION SHALL NOT BE LIABLE FOR ANY
SPECIAL INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER IN CONTRACT, TORT, OR OTHERWISE.

Damage In Shipment for the Original Purchaser

The instrument should be thoroughly inspected immediately upon
delivery to purchaser. All material in the container should be
checked against the enclosed packing list. LUXTRON cannot be
responsible for shortages against the packing list unless a claim is
filed with the carrier immediately. Final claim and negotiations with
the carrier must be completed by the customer.

What to do in Case of a Malfunction

Notify LUXTRON Customer Service giving details of the problem.
Include the instrument model number and serial number. On
receipt of this information, Customer Service will attempt to locate
the fault and, if possible, solve the problem over the telephone.

If Service concludes that the instrument has to be returned to
LUXTRON for repair, a Return Material Authorization Number
(RMA) will be issued. Upon receipt of the RMA number, the
instrument should be returned, transportation prepaid.

Shipments to LUXTRON for Repair

All shipments of LUXTRON instruments should be made prepaid
and insured via United Parcel Service or Best Way. For overseas
customers, units should be shipped air freight, priority one. The
instrument must be shipped in the original packing container or its
equivalent. LUXTRON is not responsible for freight damage to
instruments that are improperly packed.

Shipping Address:

Luxtron Corporation
3033 Scott Blvd.
Santa Clara, CA 95054-3316, USA\
Telephone: [phone]

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