Cole-Parmer 18200-40 Instruction Manual

Operating Manual

USB-based

8-channel Thermocouple Input Module

MODEL NO. 18200-40

The 18200-40 is a USB 2.0 full-speed, thermocouple input module that is fully compatible with both USB

1.1 and USB 2.0 ports.

The 18200-40 provides eight differential thermocouple input channels. Eight independent, TTL-compatible
digital I/O channels are provided to monitor TTL-level inputs, communicate with external devices, and to
generate alarms. The digital I/O channels are software programmable for input or output.

With the 18200-40, you can take measurements from type J, K, R, S, T, N, E, and B thermocouples.

The 18200-40 provides two integrated cold junction compensation (CJC) sensors for thermocouple
measurements.

An open thermocouple detection feature lets you detect a broken thermocouple. An on-board
microprocessor automatically linearizes the measurement data.

The 18200-40 is a standalone plug-and-play module which draws power from the USB cable. No external
power supply is required. All configurable options are software programmable.

The 18200-40 is fully software calibrated.

Cole-Parmer Instrument Company

625 East Bunker Court

Vernon Hills, Illinois 60061-1844

[phone]

[phone] (Fax)

800-323-4340

www.coleparmer.com

e-mail: [e-mail]

Document Revision 1, May, 2006

© Copyright 2006 Measurement Computing Corporation, TCR4

2

Table of Contents

Preface

About this Operating Manual...............................................................................................................5

What you will learn from this manual ................................................................................................................5

Conventions in this manual ................................................................................................................................5

Where to find more information.........................................................................................................................5

Chapter 1

Introducing the 18200-40......................................................................................................................6

Overview: 18200-40 features .............................................................................................................................6

18200-40 block diagram.....................................................................................................................................7

Software features................................................................................................................................................7

Connecting a 18200-40 to your computer is easy...............................................................................................8

Connecting a 18200-40 to your computer is easy...............................................................................................8

Chapter 2

Installing the 18200-40..........................................................................................................................9

What comes with your 18200-40 shipment? ......................................................................................................9

Hardware .......................................................................................................................................................................... 9

Additional documentation................................................................................................................................................. 9

Unpacking the 18200-40 ..................................................................................................................................10

Unpacking the 18200-40 ..................................................................................................................................10

Installing the software ......................................................................................................................................10

Installing the hardware .....................................................................................................................................10

Configuring the 18200-40.................................................................................................................................10

Calibrating the 18200-40 ..................................................................................................................................10

Chapter 3

Sensor Connections ...........................................................................................................................11

Screw terminal pin out......................................................................................................................................11

Thermocouple input terminals (C0H/C0L to C7H/C7L) .................................................................................................12

Ground terminals (GND) .................................................................................................................................................12

Power terminals (+5V).....................................................................................................................................................12

Digital terminals (DIO0 to DIO7)....................................................................................................................................12

CJC sensors......................................................................................................................................................................12

Thermocouple connections...............................................................................................................................13

Wiring configuration........................................................................................................................................................13

Digital I/O connections.....................................................................................................................................14

Chapter 4

Functional Details ...............................................................................................................................15

Thermocouple measurements ...........................................................................................................................15

Cold junction compensation (CJC)..................................................................................................................................15

Data linearization.............................................................................................................................................................15

Open-thermocouple detection (OTD) ..............................................................................................................................15

USB connector..................................................................................................................................................16

LED ..................................................................................................................................................................16

Power................................................................................................................................................................16

Chapter 5

Specifications......................................................................................................................................17

Analog input section.........................................................................................................................................17

Channel configurations.....................................................................................................................................17

3

18200-40 Operating Manual

Accuracy...........................................................................................................................................................18

Thermocouple measurement accuracy.............................................................................................................................18

Throughput rate ................................................................................................................................................18

Digital input/output...........................................................................................................................................19

Memory ............................................................................................................................................................19

Microcontroller.................................................................................................................................................19

USB +5V voltage .............................................................................................................................................19

Power................................................................................................................................................................19

USB specifications ...........................................................................................................................................20

Environmental ..................................................................................................................................................20

Mechanical .......................................................................................................................................................20

Screw terminal connector type and pin out.......................................................................................................20

Screw terminal pin out.....................................................................................................................................................21

4

Preface

About this Operating Manual

What you will learn from this manual

This manual explains how to install, configure, and use the 18200-40 so that you get the most out of its USB­based temperature measurement features.

This manual also refers you to related documents available on our web site, and to technical support resources.

Conventions in this manual

For more information on …

Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

<#:#> Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned

to registers, bit settings, etc.

bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For

example:

1. Insert the disk or CD and click the OK button.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For

example:
The InstaCal® installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.

Where to find more information

The following electronic documents provide helpful information relevant to the operation of the 18200-40.

! Cole-Parmer's Specifications: 18200-40 (the PDF version of the Electrical Specification Chapter in this

guide) is available on our web site at www.coleparmer.com/catalog/MoreInfo/18200-40-spec.pdf

! Cole-Parmer's Quick Start Guide is available on our web site at

www.coleparmer.com/catalog/MoreInfo/CP-Quick-Start.pdf

! Cole-Parmer's Guide to Signal Connections is available on our web site at

www.coleparmer.com/catalog/MoreInfo/CPsignals.pdf

! Cole-Parmer's Universal Library User's Guide is available on our web site at

www.coleparmer.com/catalog/MoreInfo/sm-ul-user-guide.pdf

! Cole-Parmer's Universal Library Function Reference is available on our web site at

www.coleparmer.com/catalog/MoreInfo/sm-ul-functions.pdf

! Cole-Parmer's Universal Library for LabVIEW

www.coleparmer.com/catalog/MoreInfo/SM-UL-LabVIEW.pdf

18200-40 Operating Manual (this document) is also available on our web site at

www.coleparmer.com/cpusbdaq1/18200-40.pdf

™

User’s Guide is available on our web site at

.

.

.

.

.

.

.

5

Chapter 1

Introducing the 18200-40

Overview: 18200-40 features

This manual contains all of the information you need to connect the 18200-40 to your computer and to the
signals you want to measure.

The 18200-40 is a USB 2.0 full-speed, thermocouple input module that is supported under popular Microsoft®
Windows® operating systems. The 18200-40 is fully compatible with both USB 1.1 and USB 2.0 ports.

The 18200-40 provides eight differential thermocouple input channels. Eight independent, TTL-compatible
digital I/O channels are provided to monitor TTL-level inputs, communicate with external devices, and to
generate alarms. The digital I/O channels are software programmable for input or output.

With the 18200-40, you can take measurements from type J, K, R, S, T, N, E, and B thermocouples.

The 18200-40 provides two integrated cold junction compensation (CJC) sensors for thermocouple
measurements.

An open thermocouple detection feature lets you detect a broken thermocouple. An on-board microprocessor
automatically linearizes the measurement data.

The 18200-40 is a standalone plug-and-play module which draws power from the USB cable. No external
power supply is required. All configurable options are software programmable.

The 18200-40 is fully software calibrated.

6

18200-40 Operating Manual Introducing the 18200-40

18200-40 block diagram

18200-40 functions are illustrated in the block diagram shown here.

Precision

5V Ref.

DIO

USB

USB

Micro

USB

+5V

I/O

Isolator

Isolated

DC/DC

500 V

Isolation

Barrier

8

Isolated

Micro

Te mp

sensor

(+12)

(-12)

Figure 1-1. 18200-40 functional block diagram

SPI

24-bit A/D

(CH0, CH1)

24-bit A/D

(CH2, CH3)

24-bit A/D

(CH4, CH5)

24-bit A/D

(CH6, CH7)

Input
mux.

Input
mux.

CJC

CH0-3

Input
mux.

Input
mux.

CJC

CH4-7

Screw terminalScrew terminalScrew terminal

Software features

For information on the features of InstaCal and the other software included with your 18200-40, refer to the
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at

www.coleparmer.com/catalog/MoreInfo/CP-Quick-Start.pdf

.

7

18200-40 Operating Manual Introducing the 18200-40

Connecting a 18200-40 to your computer is easy

Installing a data acquisition device has never been easier.

! The 18200-40 relies upon the Microsoft Human Interface Device (HID) class drivers. The HID class

drivers ship with every copy of Windows that is designed to work with USB ports. We use the Microsoft
HID because it is a standard, and its performance delivers full control and maximizes data transfer rates for
your 18200-40. No third-party device driver is required.

! The 18200-40 is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts to

configure.

! You can connect the 18200-40 before or after you install the software, and without powering down your

computer first. When you connect an HID to your system, your computer automatically detects it and
configures the necessary software. You can connect and power multiple HID peripherals to your system
using a USB hub.

! You can connect your system to various devices using a standard four-wire cable. The USB connector

replaces the serial and parallel port connectors with one standardized plug and port combination.

! You do not need a separate power supply module. The USB automatically delivers the electrical power

required by each peripheral connected to your system.

! Data can flow two ways between a computer and peripheral over USB connections.

8

Installing the 18200-40

What comes with your 18200-40 shipment?

The following items are shipped with the 18200-40.

Hardware

The following items should be included with your shipment.

! 18200-40

Chapter 2

! USB cable (2 meter length)

Additional documentation

In addition to this hardware manual, you should also receive the Quick Start Guide (available in PDF at

www.coleparmer.com/catalog/MoreInfo/CP-Quick-Start.pdf

software you received with your 18200-40 and information regarding installation of that software. Please read
this booklet completely before installing any software or hardware.

.). This booklet supplies a brief description of the

9

18200-40 Operating Manual Installing the 18200-40

Unpacking the 18200-40

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the 18200-40 from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.

If your 18200-40 is damaged, notify Cole-Parmer immediately by phone, fax, or email.

! Phone: [phone].
! Fax: [phone]
! Email: [e-mail]

Installing the software

Refer to the Quick Start Guide for instructions on installing the software on the C-P Data Acquisition Software
CD. This booklet is available in PDF at www.coleparmer.com/catalog/MoreInfo/CP-Quick-Start.pdf.

Installing the hardware

To connect the 18200-40 to your system, turn your computer on, and connect the USB cable to a USB port on
your computer or to an external USB hub that is connected to your computer. The USB cable provides power
and communication to the 18200-40.

When you connect the 18200-40 for the first time, a
dialog (other Windows versions) opens as the 18200-40 is detected.

When this balloon or dialog closes, the installation is complete. The
This indicates that communication is established between the 18200-40 and your computer.

Caution! Do not disconnect any device from the USB bus while the computer is communicating with the

18200-40, or you may lose data and/or your ability to communicate with the 18200-40.

If the LED turns off

If the LED is lit but then turns off, the computer has lost communication with the 18200-40. To restore
communication, disconnect the USB cable from the computer, and then reconnect it. This should restore
communication, and the LED should turn back on.

Found New Hardware popup balloon (Windows XP) or

USB LED should flash and then remain lit.

Configuring the 18200-40

All hardware configuration options on the 18200-40 are programmable with software. Use InstaCal to set the
thermocouple type for each channel pair. Configuration options are stored on the 18200-40 's isolated
microcontroller in EEPROM, which is non-volatile memory on the 18200-40 module. Configuration options are
loaded on power up. The factory default configuration is Type J thermocouple.

Allow the 18200-40 to warm up for 30 minutes after powering up before taking measurements. This warm up
time minimizes thermal drift and achieves the specified rated accuracy of measurements.

Calibrating the 18200-40

The 18200-40 is fully calibrated via InstaCal. Allow a 30 minute warm up before calibrating.

10

Chapter 3

Sensor Connections

The 18200-40 supports type types J, K, R, S, T, N, E, and B thermocouples.

Thermocouple selection

The thermocouple type you select will depend on your application needs. Review the temperature ranges and
accuracies of each type to determine which is best suited for your application.

Screw terminal pin out

The 18200-40 has four rows of screw terminals — two rows on the top edge of the housing, and two rows on
the bottom edge. Each row has 26 connections. Between each bank of screw terminals are two integrated CJC
sensors used for thermocouple measurements. Signals are identified in Figure 3-1.

RSVD

27 RSVD

28 GND

29 C7L

30 C7H3132 NC

6

RSVD

RSVD

33 C6L

34 C6H

35 NC

36

37

CJC SensorCJC Sensor

11

10

RSVD

38 GND

39 C5L

40 C5H4142 NC

16

RSVD

43 C4L

44 C4H

45 NC4647 +5V

48 GND

49 DIO7

50 DIO6

51 DIO5

52 DIO4

20

RSVD 1

NC 2

C0H 3

C0L 4

NC 5

C1H 7

C1L 8

GND 9

RSVD

RSVD

NC 12

C2H 13

C2L 14

NC 15

C3H 17

C3L 18

GND 19

+5V 21

GND 22

DIO0 23

DIO1 24

DIO2 25

RSVD

RSVD

RSVD

DIO3 26

Figure 3-1. 18200-40 screw terminal pin numbers

11

18200-40 Operating Manual Sensor Connections

Table 3-1. 18200-40 screw terminal descriptions

Pin Signal Name Pin Description Pin Signal Name Pin Description

1 RSVD Reserved, Do Not Use 27 RSVD Reserved, Do Not Use
2 NC Not connected 28 GND Ground

3 C0H CH0 sensor input (+) 29 C7L

4 C0L
5 NC Not connected 31 RSVD Reserved, Do Not Use

6 RSVD Reserved, Do Not Use 32 NC Not connected
7 C1H CH1 sensor input (+) 33 C6L

8 C1L
9 GND Ground 35 NC Not connected

10 RSVD Reserved, Do Not Use 36 RSVD Reserved, Do Not Use

11 RSVD Reserved, Do Not Use 37 RSVD Reserved, Do Not Use
12 NC Not connected 38 GND Ground

13 C2H CH2 sensor input (+) 39 C5L

14 C2L
15 NC Not connected 41 RSVD Reserved, Do Not Use

16 RSVD Reserved, Do Not Use 42 NC Not connected
17 C3H CH3 sensor input (+) 43 C4L

18 C3L
19 GND Ground 45 NC Not connected

20 RSVD Reserved, Do Not Use 46 RSVD Reserved, Do Not Use
21 +5V +5V output 47 +5V +5V output
22 GND Ground 48 GND Ground
23 DIO0 Digital Input/Output 49 DIO7 Digital Input/Output
24 DIO1 Digital Input/Output 50 DIO6 Digital Input/Output
25 DIO2 Digital Input/Output 51 DIO5 Digital Input/Output
26 DIO3 Digital Input/Output 52 DIO4 Digital Input/Output

CJC sensor

CH0 sensor input (

CH1 sensor input (

CH2 sensor input (

CH3 sensor input (

-)

-)

-)

-)

30 C7H CH7 sensor input (+)

34 C6H CH6 sensor input (+)

40 C5H CH5 sensor input (+)

44 C4H CH4 sensor input (+)

CJC sensor

CH7 sensor input (

CH6 sensor input (

CH5 sensor input (

CH4 sensor input (

-)

-)

-)

-)

Use 16 AWG to 30 AWG wire for your signal connections.

Tighten screw terminal connections

When making connections to the screw terminals, be sure to tighten the screw until tight. Simply touching the
top of the screw terminal is not sufficient to make a proper connection.

Thermocouple input terminals (C0H/C0L to C7H/C7L)

You can connect up to eight thermocouples to the differential sensor inputs (C0H/C0L to C7H/C7L). The
18200-40 supports type types J, K, R, S, T, N, E, and B thermocouples.

Ground terminals (GND)

The six analog ground terminals (GND) provide a common ground for the input channels and DIO bits and are
isolated (500 VDC) from the USB GND.

Power terminals (+5V)

The two +5V terminals are isolated (500 VDC) from the USB +5V.

Digital terminals (DIO0 to DIO7)

You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7. Each terminal is
software configurable for input or output.

CJC sensors

The 18200-40 has two built in high-resolution temperature sensors. One sensor is located on the right side of the
package, and one sensor is located at the left side.

12

18200-40 Operating Manual Sensor Connections

Thermocouple connections

A thermocouple consists of two dissimilar metals that are joined together at one end. When the junction of the
metals is heated or cooled, a voltage is produced that correlates to temperature.

The 18200-40 makes fully differential thermocouple measurements without the need of ground-referencing
resistors. A 32-bit floating point value in either a voltage or temperature format is returned by software. An
open thermocouple detection feature is available for each analog input which automatically detects an open or
broken thermocouple.

Use InstaCal to select the thermocouple type (J, K, R, S, N. E, and B) and one or more sensor input channels to
connect the thermocouple.

Wiring configuration

Connect the thermocouple to the 18200-40 using a differential configuration, as shown in Figure 3-2.

I#+

NC

C#H

C#L

4W##

IC##

C#H

C#L

GND

I#-

Figure 3-2. Typical thermocouple connection

Connect thermocouples to the 18200-40 such that they are floating with respect to GND (pins 9, 19, 28, 38).
The 18200-40 GND pins are isolated from earth ground, so connecting thermocouple sensors to voltages
referenced to earth ground is permissible as long as the isolation between the GND pins (9, 19, 28, 38) and earth
ground is maintained.

When thermocouples are attached to conductive surfaces, the voltage differential between multiple
thermocouples must remain within ±1.4 V. For best results, we recommend the use of insulated or ungrounded
thermocouples when possible.

Maximum input voltage between analog input and ground

The absolute maximum input voltage between an analog input and the isolated GND pins is ±25 VDC when the
18200-40 is powered on, and ±40 VDC when the 18200-40 is powered off.

If you need to increase the length of your thermocouple, use the same type of thermocouple wires to minimize
the error introduced by thermal EMFs.

13

18200-40 Operating Manual Sensor Connections

Digital I/O connections

You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7. You can configure
each digital bit for either input or output. All digital I/O lines are pulled up to +5V with a 47 K ohm resistor
(default). You can request the factory to configure the resistor for pull-down to ground if desired.

When you configure the digital bits for input, you can use the 18200-40 digital I/O terminals to detect the state
of any TTL-level input. Refer to the schematic shown in Figure 3-3. If you set the switch to the +5V input,
DIO0 reads TRUE (1). If you move the switch to GND, DIO0 reads FALSE (0).

DIO0

+5V+GND

Figure 3-3. Schematic showing switch detection by digital channel DIO0

All ground pins on the 18200-40 (pins 9, 19, 28, 38) are isolated from earth ground. If a connection is made to
earth ground when using digital I/O and conductive thermocouples, the thermocouples are no longer isolated. In
this case, thermocouples must not be connected to any conductive surfaces that may be referenced to earth
ground

For more information on digital signal connections

For more information on digital signal connections and digital I/O techniques, refer to the Guide to Signal
Connections (available on our web site at www.coleparmer.com/catalog/MoreInfo/CPsignals.pdf.)

14

Chapter 4

Functional Details

Thermocouple measurements

A thermocouple consists of two dissimilar metals that are joined together at one end. When the junction of the
metals is heated or cooled, a voltage is produced that correlates to temperature.

The 18200-40 hardware level-shifts the thermocouple’s output voltage into the A/D’s common mode input
range by applying +2.5 V to the thermocouple’s low side at the C#L input. Always connect thermocouple
sensors to the 18200-40 in a floating fashion. Do not attempt to connect the thermocouple low side C#L to GND
or to a ground referencing resistor.

Cold junction compensation (CJC)

When you connect the thermocouple sensor leads to the sensor input channel, the dissimilar metals at the
18200-40 terminal blocks produce an additional thermocouple junction. This junction creates a small voltage
error term which must be removed from the overall sensor measurement using a cold junction compensation
technique. The measured voltage includes both the thermocouple voltage and the cold junction voltage. To
compensate for the additional cold junction voltage, the 18200-40 subtracts the cold junction voltage from the
thermocouple voltage.

The 18200-40 has two high-resolution temperature sensors that are integrated into the design of the 18200-40.
One sensor is located on the right side of the package, and one sensor is located at the left side. The CJC sensors
measure the average temperature at the terminal blocks so that the cold junction voltage can be calculated. A
software algorithm automatically corrects for the additional thermocouples created at the terminal blocks by
subtracting the calculated cold junction voltage from the analog input's thermocouple voltage measurement.

Increasing the thermocouple length

If you need to increase the length of your thermocouple, use the same type of thermocouple wires to minimize
the error introduced by thermal EMFs.

Data linearization

After the CJC correction is performed on the measurement data, an on-board microcontroller automatically
linearizes the thermocouple measurement data using National Institute of Standards and Technology (NIST)
linearization coefficients for the selected thermocouple type.

The measurement data is then output as a 32-bit floating point value in the configured format (voltage or
temperature).

Open-thermocouple detection (OTD)

The 18200-40 is equipped with an open-thermocouple detection for each analog input channel. With OTD, any
open-circuit or short-circuit condition at the thermocouple sensor is detected by the software. An open channel
is detected by driving the input voltage to a negative value outside the range of any thermocouple output. The
software recognizes this as an invalid reading and flags the appropriate channel. The software continues to
sample all channels when OTD is detected.

Input leakage current

With open-thermocouple detection enabled, 105 nA (max.) of input leakage current is injected into the
thermocouple. This current can cause an error voltage to develop across the lead resistance of the thermocouple
that is indistinguishable from the thermocouple voltage you are measuring. You can estimate this error voltage
with the following formula:

error voltage = resistance of the thermocouple x 105 nA

To reduce the error, reduce the length of the thermocouple to lower its resistance, or lower the AWG of the wire
by using a wire with a larger diameter. With open-thermocouple detection disabled, 30 nA (max.) of input
leakage current is injected into the thermocouple.

15

18200-40 Operating Manual Functional Details

USB connector

The USB connector provides +5V power and communication. No external power supply is required.

LED

The LED indicates the communication status of the 18200-40. It uses up to 5 mA of current. Table 4-2 defines
the function of the 18200-40 LED.

Table 4-2. LED Illumination

LED
Illumination

Steady green The 18200-40 is connected to a computer or external USB hub.

Pulsing green Data is being transferred.

Indication

Upon connection, the LED should flash three times and then remain lit (indicates a successful
installation).

Power

The two +5V terminals are isolated (500 VDC) from the USB +5V.

Caution! Each +5V terminal is an output. Do not connect to an external power supply or you may damage

the 18200-40 and possibly the computer.

16

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog input section

Table 1. Generic analog input specifications

Parameter Conditions Specification

A/D converters Four dual 24-bit, Sigma-Delta type
Number of channels 8 differential

Input isolation 500 VDC minimum between field wiring and

USB interface

Channel configuration Thermocouple sensor type

Differential input voltage
range

Absolute maximum input
voltage

Input impedance 5 Gigohm, min.
Input leakage current Open thermocouple detect enabled 105 nA max.

Thermocouple ±0.080 V

±C0x through ±C7x relative to
GND (pins 9,19,28,38)

±25 V power on, ±40 V power off.

Chapter 5

Normal mode rejection ratio f
Common mode rejection
ratio

Resolution 24 bits
No missing codes 24 bits
Input coupling DC
Warm-up time 30 minutes min.
Open thermocouple detect Automatically enabled when the channel pair

CJC sensor accuracy

= 60 Hz 90 dB min.

IN

f

= 50 Hz/60 Hz 100 dB min.

IN

is configured for thermocouple sensors.
The maximum open detection time is 3
seconds.

15 °C to 35 °C ±0.25 °C typ.,

±0.5 °C max.

0 °C to 70 °C -1.0 to +0.5 °C max

Channel configurations

Table 2. Channel configuration specifications

Sensor Category Conditions Specification

Thermocouple J, K, S, R, B, E, T, or N 8 differential channels

Note 1: Channel configuration information is stored in the EEPROM of the isolated microcontroller by

the firmware whenever any item is modified. Modification is performed by commands issued
over USB from an external application, and the configuration is made non-volatile through the
use of the EEPROM.

Note 2: The factory default configuration is Type J.

17

18200-40 Operating Manual Specifications

Accuracy

Thermocouple measurement accuracy

Table 3. Thermocouple accuracy specifications, including CJC measurement error

Sensor Type Maximum error Typical error Temperature range

±1.499 °C ±0.507 °C -210 to 0 °C J

±0.643 °C ±0.312 °C 0 to 1200 °C

±1.761 °C ±0.538 °C -210 to 0 °C K

±0.691 °C ±0.345 °C 0 to 1372 °C

±2.491°C ±0.648 °C -50 to 250 °C S

±1.841 °C ±0.399 °C 250 to 1768.1 °C

±2.653 °C ±0.650 °C -50 to 250 °C R

±1.070 °C ±0.358 °C 250 to 1768.1 °C

±1.779 °C ±0.581 °C 250 to 700 °C B

±0.912 °C ±0.369 °C 700 to 1820 °C

±1.471 °C ±0.462 °C -200 to 0 °C E

±0.639 °C ±0.245 °C 0 to 1000 °C

±1.717 °C ±0.514 °C -200 to 0 °C T

±0.713 °C ±0.256 °C 0 to 600 °C

±1.969 °C ±0.502 °C -200 to 0 °C N

±0.769 °C ±0.272 °C 0 to 1300 °C

Note 3: Thermocouple specifications include linearization, cold-junction compensation and system noise.

These specs are for one year, or 3000 operating hours, whichever comes first and for operation of
the 18200-40 between 15 °C and 35 °C. For measurements outside this range, add ±0.5 degree to
the maximum error shown. There are CJC sensors on each side of the module. The accuracy
listed above assumes the screw terminals are at the same temperature as the CJC sensor. Errors
shown do not include inherent thermocouple error. Please contact your thermocouple supplier for
details on the actual thermocouple error.

Note 4: Thermocouples must be connected to the 18200-40 such that they are floating with respect to

GND (pins 9, 19, 28, 38). The 18200-40 GND pins are isolated from earth ground, so connecting
thermocouple sensors to voltages referenced to earth ground is permissible as long as the
isolation between the GND pins and earth ground is maintained.

Note 5: When thermocouples are attached to conductive surfaces, the voltage differential between

multiple thermocouples must remain within ±1.4V. For best results we recommend the use of
ungrounded or insulated thermocouples when possible.

Throughput rate

Table 4. Throughput rate specifications

Number of input channels Maximum throughput

1 2 Samples/second
2 2 S/s on each channel, 4 S/s total
3 2 S/s on each channel, 6 S/s total
4 2 S/s on each channel, 8 S/s total
5 2 S/s on each channel, 10 S/s total
6 2 S/s on each channel, 12 S/s total
7 2 S/s on each channel, 14 S/s total
8 2 S/s on each channel, 16 S/s total

Note 6: The analog inputs are configured to run continuously. Each channel is sampled twice per second.

The maximum latency between when a sample is acquired and the temperature data is provided
by the USB unit is approximately 0.5 seconds.

18

18200-40 Operating Manual Specifications

Digital input/output

Table 5. Digital input/output specifications

Digital type CMOS
Number of I/O 8 (DIO0 through DIO7)
Configuration Independently configured for input or output.

Power on reset is input mode.

Pull up/pull-down configuration All pins pulled up to +5 V via 47 K resistors (default). Pull down to

ground (GND) also available.

Digital I/O transfer rate (software paced) ! Digital input – 50 port reads or single bit reads per second typ.

! Digital output – 100 port writes or single bit writes per second typ.

Input high voltage 2.0 V min., 5.5 V absolute max.
Input low voltage 0.8 V max., -0.5 V absolute min.
Output low voltage (IOL = 2.5 mA) 0.7 V max
Output high voltage
(IOH = -2.5 mA)

Note 7: All ground pins on the 18200-40 (pins 9, 19, 28, 38) are isolated from earth ground. If a

3.8 V min.

connection is made to earth ground when using digital I/O and conductive thermocouples, the
thermocouples are no longer isolated. In this case, thermocouples must not be connected to any
conductive surfaces that may be referenced to earth ground.

Memory

Table 6. Memory specifications

EEPROM 1,024 bytes isolated micro reserved for sensor configuration

256 bytes USB micro for external application use

Microcontroller

Table 7. Microcontroller specifications

Type Two high performance 8-bit RISC microcontrollers

USB +5V voltage

Table 8. USB +5V voltage specifications

Parameter Conditions Specification

USB +5V (VBUS) input voltage range 4.75 V min. to 5.25 V max.

Power

Table 9. Power specifications

Parameter Conditions Specification

Supply current USB enumeration <100 mA
Supply current
(Note 8)
User +5V output voltage range
(terminal block pin 21 and 47)
User +5V output current
(terminal block pin 21 and pin 47)
Isolation Measurement system to PC 500 VDC min.

Note 8: This is the total current requirement for the 18200-40 which includes up to 10 mA for the status

LED.

Continuous mode 70 mA max.

Connected to self-powered hub. (Note 9) 4.75 V min. to

5.25 V max.

Bus-powered and connected to a self-powered hub. (Note 9) 10 mA max.

19

18200-40 Operating Manual Specifications

Note 9: Self-Powered Hub refers to a USB hub with an external power supply. Self-powered hubs allow

a connected USB device to draw up to 500 mA.

Root Port Hubs reside in the PC’s USB Host Controller. The USB port(s) on your PC are root
port hubs. All externally powered root port hubs (desktop PC’s) provide up to 500 mA of current
for a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon
the manufacturer. A laptop PC that is not connected to an external power adapter is an example
of a battery-powered root port hub.

USB specifications

Table 10. USB specifications

USB device type USB 2.0 (full-speed)
Device compatibility USB 1.1, USB 2.0
Self-powered, 100 mA consumption max

USB cable type A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,

min 28 AWG D+/D-)

USB cable length 3 meters max.

Environmental

Table 11. Environmental specifications

Operating temperature range
Storage temperature range -40 to 85 ° C
Humidity 0 to 90% non-condensing

0 to 70 ° C

Mechanical

Table 12. Mechanical specifications

Dimensions 127 mm (L) x 88.9 mm (W) x 35.56 (H)
User connection length 3 meters max.

Screw terminal connector type and pin out

Table 13. Screw terminal connector specifications

Connector type Screw terminal
Wire gauge range 16 AWG to 30 AWG

20

18200-40 Operating Manual Specifications

Screw terminal pin out

Table 14. Screw terminal pin out

Pin Signal Name Pin Description Pin Signal Name Pin Description

1 RSVD Reserved, Do Not Use 27 RSVD Reserved, Do Not Use
2 NC 28 GND

3 C0H CH0 sensor input (+) 29 C7L

4 C0L
5 NC 31 RSVD Reserved, Do Not Use

6 RSVD Reserved, Do Not Use 32 NC
7 C1H CH1 sensor input (+) 33 C6L

8 C1L
9 GND 35 NC

10 RSVD Reserved, Do Not Use 36 RSVD Reserved, Do Not Use

11 RSVD Reserved, Do Not Use 37 RSVD Reserved, Do Not Use
12 NC 38 GND

13 C2H CH2 sensor input (+) 39 C5L

14 C2L
15 NC 41 RSVD Reserved, Do Not Use

16 RSVD Reserved, Do Not Use 42 NC
17 C3H CH3 sensor input (+) 43 C4L

18 C3L
19 GND 45 NC

20 RSVD Reserved, Do Not Use 46 RSVD Reserved, Do Not Use
21 +5V +5V output 47 +5V +5V output
22 GND 48 GND
23 DIO0 Digital Input/Output 49 DIO7 Digital Input/Output
24 DIO1 Digital Input/Output 50 DIO6 Digital Input/Output
25 DIO2 Digital Input/Output 51 DIO5 Digital Input/Output
26 DIO3 Digital Input/Output 52 DIO4 Digital Input/Output

CJC sensor

CH0 sensor input (

CH1 sensor input (

CH2 sensor input (

CH3 sensor input (

-)

-)

-)

-)

30 C7H CH7 sensor input (+)

34 C6H CH6 sensor input (+)

40 C5H CH5 sensor input (+)

44 C4H CH4 sensor input (+)

CJC sensor

CH7 sensor input (

CH6 sensor input (

CH5 sensor input (

CH4 sensor input (

-)

-)

-)

-)

21

Declaration of Conformity

Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA

Category: Electrical equipment for measurement, control and laboratory use.

Measurement Computing Corporation declares under sole responsibility that the product

18200-40

to which this declaration relates is in conformity with the relevant provisions of the following standards or other
documents:

EU EMC Directive 89/336/EEC: Electromagnetic Compatibility, EN 61326 (1997) Amendment 1 (1998)

Emissions: Group 1, Class B

! EN 55011 (1990)/CISPR 11: Radiated and Conducted emissions.

Immunity: EN61326, Annex A

! IEC 1000-4-2 (1995): Electrostatic Discharge immunity, Criteria A.
! IEC 1000-4-3 (1995): Radiated Electromagnetic Field immunity Criteria A.
! IEC 1000-4-8 (1994): Power Frequency Magnetic Field immunity Criteria A.

Power line and I/O tests to IEC 1000-4-4, IEC 1000-4-5, IEC 1000-4-6, and IEC 1000-4-11 were not required.
The device is DC powered from an I/O cable which is less than three meters long.

Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
April, 2005. Test records are outlined in Chomerics Test Report #EMI4193.05.

We hereby declare that the equipment specified conforms to the above Directives and Standards.

Carl Haapaoja, Director of Quality Assurance

HM 18200-40.doc

Cole-Parmer Instrument Company

625 East Bunker Court

Vernon Hills, Illinois 60061-1844

[phone]

Fax: [phone] (Fax)

800-323-4340

www.coleparmer.com

E-mail: [e-mail]