Omega Products SignalPro Installation Manual

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CUSTOM CONFIGURABLE SIGNAL CONDITIONING MODULES

SignalPro

OMEGA ENGINEERING, INC. Tel: [phone]



Signal Conditioning System

Users Manual

One Omega Drive Fax: [phone]
P.O. Box 4047 Toll free:1-800-826-6342
Stamford, CT 06907-4047 E-mail:[e-mail]

http://www.dasieee.com

WARRANTY WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC., warrants this unit to be free of defects in materials and workmanship fo r a period of 13
months from the date of purchase. OMEGA warranty adds an additional one (1) month grace period to the normal one (1)
year product warranty to cover shipping and handling time. This ensures that OMEGA’s customers receive maximum

coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’s
Customer Service Department will issue an Authorized Return (AR) number im mediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. OMEGA’s
warranty does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling,
improper interfacing, operation o utside design limits, impr oper repair or unauthorized modif ication. This WARRANTY is
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PROPER PACKAGING TO PREVENT BREAKAGE IN TRANSIT.

FOR WARRANTY
(1) P.O. Number under which the product was purchased,
(2) Model and serial number of the product under warranty, and
(3) Repair instructions and/or specific problems relative to the product.

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BEFORE contacting OMEGA:
(1) P.O. Number to cover the cost of the repair,
(2) Model and serial number of the product, and
(3) Repair instructions relative to the product.

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customers the latest in technology and engineering. OM EGA is a registered trademark of OMEGA EN GI N EERIN G, I N C. ©
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written consent of OMEGA ENGINEERING, INC.

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[e-mail]

:

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:

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The information contained in this document is believed to be correct but OMEGA Engineering, Inc.
accepts no liability for any errors it contains, and reserves the right to alter specifications without
notice. WARNING: These products are not designed for use in, and should not be used for, p atient
connected applications.

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E-mail: [e-mail]

Table of Contents

29

4.3.4 Differential Thermocouple Measurements

29

4.3.3 Single Ended Thermocouple Measurements

29

4.3.2 Software Zero Correction

28

4.3.1 Cold Junction Compensation (CJC) Sensor

4.3 Basic Principles

26

4.2.2 QTC-200T Terminal Board Configuration

26

4.2.1 QTC-200 Interface Board Configuration

4.2 Hardware Configuration

25

4.1.2 QTC-200T Terminal Board Description

25

4.1.1 QTC-200 Interface Board Description

4.1 Circuit Board Description

4 QTC-200 Thermocouple Input Module

3.2 QTC-100 Specifications

22

3.1.2 Power Jack and Switch

22

3.1.1 AC/DC Power Supply Priority

3.1 Circuit Board Description

3 QTC-100 DC Voltage Power Adapter Module

2.4 Physical Dimensions

2.3 Power Requirements

19

2.2.3 Multiple Enclosures

19

2.2.2 External TTL Trigger Connector

19

2.2.1 Data Acquisition Adapter Connection

2.2 External Connections

2.1 Multiple Module Enclosures

2 SignalPro™ Series Racks and Enclosures

16

1.3.3 Expansion Channel Numbering

15

1.3.2 Board Selection Jumper Configuration

14

1.3.1 Main A/D Channel Selection and Jumper Configuration

1.3 Hardware Configuration

14

1.2.2 Terminal Board Description

13

1.2.1 Interface Board Description

1.2 Hardware Description

12

1.1.4 Analog-to-Digital Converter (ADC)

12

1.1.3 Multiplexer

12

1.1.2 Signal Conditioner

12

1.1.1 Transducers

1.1 Functional Description

1 SignalPro™ Series Overview

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SignalPro Series Users Manual 5

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18
19
19

20
20

21
22

23

24
25

26

28

7.4 QTC-350/QTC-350S Specifications

7.3 Field Wiring

60

7.2.1 QTC-350 Interface Board Configuration

7.2 Hardware Configuration

7.1 Circuit Board Description

7 QTC-350 Accelerometer/Dynamic Signal Input

6.6 QTC-300S/QTC-300T Specifications

6.5 Configuration Examples

53

6.4.4 Quarter Bridge Strain Gage Measurements

52

6.4.3 Half Bridge Strain Gage Measurements

51

6.4.2 Full Bridge Strain Gage Measurements

51

6.4.1 Basic Principles

6.4 Strain Gage Measurements

50

6.3.2 Calibration Mode

49

6.3.1 Normal Mode

6.3 Calibration Modes

47

6.2.2 QTC-300T Terminal Board Configuration

43

6.2.1 QTC-300 Interface Board Configuration

6.2 Hardware Configuration

42

6.1.2 QTC-300T Terminal Board Description

42

6.1.1 QTC-300 Interface Board Description

6.1 Circuit Board Description

6 QTC-300 Strain Gage Input Signal

5.5 QTC-250/QTC-250T Specifications

38

5.4.3 Four-Wire RTD Measurements

38

5.4.2 Three-Wire RTD Measurements

37

5.4.1 Two-Wire RTD Measurements

5.4 Basic Principles

5.3 RTD Measurements

34

5.2.2 QTC-250T Terminal Board Configuration

34

5.2.1 QTC-250 Interface Board Configuration

5.2 Hardware Configuration

33

5.1.2 QTC-250T Terminal Board Description

33

5.1.1 QTC-250 Interface Board Description

5.1 Circuit Board Description

5 QTC-250 RTD Signal Conditioning Module

4.4 QTC-200/QTC-200T Specifications

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SignalPro Series Users Manual 6

30

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Conditioning Module

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32
33

34

37
37

39

41
42

43

49

51

54
57

Module

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59
60
60

65
67

10.4 QTC-500/QTC-500T/QTC-500TC Specifications

10.3 Field Wiring

86

10.2.2 QTC-500T / QTC-500TC Terminal Board Configuration

85

10.2.1 QTC-500 Interface Board Configuration

10.2 Hardware Configuration

85

10.1.2 QTC-500T/QTC-500TC Terminal Board Description

85

10.1.1 QTC-500 Interface Board Description

10.1 Circuit Board Description

10 QTC-500 5B Module Multipurpose Isolated

9.5 QTC-450 Specifications

81

9.4.3 Low Pass Filter Design Examples

80

9.4.2 Filter Block Configuration

79

9.4.1 Filter Parameter Selection

9.4 Filter Design Program

9.3 Field Wiring

74

9.2.1 QTC-450 Interface Board Configuration

9.2 Hardware Configuration

9.1 Circuit Board Description

9 QTC-450 Low/High Bandpass Filter Input

8.3 QTC-400/400T Specifications

70

8.2.1 QTC-400 Interface Board Configuration

8.2 Hardware Configuration

70

8.1.2 QTC-400T Terminal Board Description

70

8.1.1 QTC-400 Interface Board Description

8.1 Circuit Board Description

8 QTC-400 Universal Current/Voltage Input

Module

SignalPro Series Users Manual 7

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69
70

70

72

Module

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Signal Input Card

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73
74
74

78
79

82

84
85

85

86
88

List of Figures

61

Figure 7-4. Filter Selection Jumpers

61

Figure 7-3. QTC-350/QTC-350S SSH Selection Jumper

60

Figure 7-2. QTC-350 Interface Board Jumper and Switch Locations

59

Figure 7-1. QTC-350 Accelerometer/Dynamic Signal Input Module

53

Figure 6-15. Quarter Bridge Wiring Configuration

52

Figure 6-14. Half Bridge Wiring Configuration

52

Figure 6-13. Full Bridge Wiring Configuration

51

Figure 6-12. Full Wheatstone Bridge Strain Gage Measurement

49

Figure 6-11. Calibration Modes

48

Figure 6-10. External Excitation Power Supply Connections

48

Figure 6-9. Excitation Current Selection

47

Figure 6-8. QTC-300T Terminal Board

46

Figure 6-7. AC/DC Coupling Jumper

45

Figure 6-6. Low-Pass Filter Block

45

Figure 6-5. Filter Selection Jumper

44

Figure 6-4. A/D Gain Selection Jumpers

44

Figure 6-3. QTC-300/QTC-300S SSH Selection Jumper

43

Figure 6-2. QTC-300 Jumper and Filter Block Locations

41

Figure 6-1. QTC-300 Strain Gage Input Module

38

Figure 5-8. Four-Wire RTD Measurement

38

Figure 5-7. Three-Wire RTD Measurement

37

Figure 5-6. Two-Wire RTD Measurement

36

Figure 5-5. Excitation Current Selection Jumpers

36

Figure 5-4. A/D Gain Selection Switches

34

Figure 5-3. QTC-250 Interface Board Jumper Locations

33

Figure 5-2. QTC-250T Terminal Board

32

Figure 5-1. RTD Signal Conditioning Module

29

Figure 4-6. Differential Thermocouple Measurement

29

Figure 4-5 Single Ended Thermocouple Measurement

27

Figure 4-4. Thermocouple Input Mode Selection Switches

27

Figure 4-3. QTC-200T Terminal Board

26

Figure 4-2. QTC-200 Main A/D Channel Jumper Block Location

24

Figure 4-1. QTC-200 Thermocouple Input Module

22

Figure 3-2. QTC-100 Block Diagram

21

Figure 3-1. QTC-100 DC Voltage Power Adapter Module

19

Figure 2-2. Multiple Module Enclosure Block Diagram

18

Figure 2-1. SignalPro Series Data Acquisition Racks and Enclosures

17

Figure 1-5. Expansion Channel Numbering in a Multiple Module System

16

Figure 1-4. SignalPro Series Board Selection Jumpers

15

Figure 1-3. SignalPro Series Main A/D Channel Selection Jumpers

13

Figure 1-2. SignalPro Portable Signal Conditioning System (QTC-250-PCS)

11

Figure 1-1. SignalPro Data Acquisition System Block Diagram

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SignalPro Series Users Manual 8

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87

Figure 10-4. Field Wiring of 5B Series Modules

86

Figure 10-3. QTC-500T /QTC-500TC Terminal Board

85

Figure 10-2. QTC-500 Jumper Block Locations

84

Figure 10-1. QTC-500 5B Module Multipurpose Isolated Input Card

80

Figure 9-10. Corresponding Component Values of LP, HP and PP1

80

Figure 9-9. Low-pass, Band-pass and High-pass Filter Block Diagram

78

Figure 9-8. QTC-450 Wiring Diagram

77

Figure 9-7. Analog Ground Option Switch

76

Figure 9-6. Filter Block Socket Designations

76

Figure 9-5. SSH Selection Jumper

75

Figure 9-4. Filter Selection Jumpers

75

Figure 9-3. A/D Channel Gain Selection Jumpers

74

Figure 9-2. QTC-450 Jumper Block, Filter Block and Switch Locations

73

Figure 9-1. QTC-450 Low/High Bandpass Filter Input Module

71

Figure 8-3. Analog Ground Option Jumper

70

Figure 8-2. Current Measurement Resistor Sockets

69

Figure 8-1. QTC-400 Universal Voltage/Current Module

65

Figure 7-11. Dynamic Sensor Configuration

65

Figure 7-10. ICP Sensor Configuration

64

Figure 7-9. Excitation Current Selection

63

Figure 7-8. A/D Gain Selection Switch

63

Figure 7-7. AC/DC Coupling Selection Jumper

63

Figure 7-6. Sensor Type Selection Jumper

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62

Figure 7-5. Filter Block Socket Designations

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SignalPro Series Users Manual 9

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List of Tables

81

Table 9-2. Butterworth Low Pass Filter Design Examples

77

Table 9-1. Omega Pre-Configured Filter Blocks

66

Table 7-4. Maximum Driving Capability of a Coaxial Cable with 30pF/ft. Capacitance

64

Table 7-3. Expansion Channels versus A/D Gain Selection

62

Table 7-2. Butterworth Low Pass Filter Design Examples

62

Table 7-1. Omega Pre-Configured RC Filter Blocks

50

Table 6-3. QTC-300 Calibration Modes

46

Table 6-2. Butterworth Low Pass Filter Design Examples

46

Table 6-1. Omega Pre-Configured RC Filter Blocks

35

Table 5-1. Suggested Gain and Excitation Current Values for Supported RTD Types

20

Table 2-1. Data Acquisition Enclosure Physical Dimensions

15

Table 1-2. Main A/D Channel Jumper Block Designators

14

Table 1-1. Expansion Channel Availability

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SignalPro Series Users Manual 10

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1 SignalPro Series Overview

SignalPro Series Users Manual 11

Electrical measurement of physical quantities is often performed using a “transducer”.
Transducers, i n the context of this discussi on, are d evices that convert physical quantities such
as acceleration, strain or temperature to an electrical output signal. An example of a
transducer is the thermocouple, which is used to measure temperature. Transducers are
available in a wide variety of shapes, sizes and specifications for most applications.

The Omega SignalPro signal conditioning system provides a complete solution for data
acquisition using transducers. The SignalPro system provides the transducer with excitation
or biasing when required and then performs the necessary “conditioning” of the electrical
output signal from the transducer prior to measurement by an analog-to-digital converter
(ADC).

1.1 Functional Description

The SignalPro signal conditioning system covers a wide range of transducers and
applications, ye t most of the modul es shar e some common elements. F i gur e 1-1 shows a bl ock
diagram of a typical data acquisition system using SignalPro series signal conditioning
modules.

Transducer

Signal

Conditioner

Transducer

Signal

Conditioner

Multiplexer

ADC

Computer

Transducer

Signal

Conditioner

Transducer

Signal

Conditioner

Figure 1-1. SignalPro Data Acquisition System Block Diagram

1.1.1 Transducers

The SignalPro series includes signal conditioning modules that enable the user to create data

SignalPro Series Users Manual 12

acquisition systems for transducers such as thermocouples, resistance temperature detectors
(RTDs), strain gages and accelerometers. Multiple transducers can be attached to a single
module, the number of which depends on the specific module selected.

1.1.2 Signal Conditioner

The electri ca l output signal generated b y a transducer of te n nee d s “conditioni ng ” b e f or e it can
be measured by an ADC. The signal may require amplification, filtering, linearization and
more before the ADC can accurately read it. Additionally, some transducers require an
excitation source or proper bia sing to complete me asurements. The Signal Pro syste m provid es
the transducer with any required excitation or biasing and performs all necessary
conditioning of the electrical output signal.

1.1.3 Multiplexer

SignalPro ser ies modul es can pr ovide up to 16 cha nnels of tr ansducer input b y mul tipl exi ng a
single main analog-to-digital (A/D) channel off the data acquisition adapter in the host
computer. The mul tiplexers on a SignalPro seri es module work like a switch, scanning each
transducer input channel and connecting the input to the selected main A/D channel.

The multipl exed input channels on the SignalPro modul e may be mapped back to any main
A/D channel on the data acquisition adapter in the host computer via jumper configuration.
Some modules provide less than 16 input channels, yet allow multiple modules to share a
single main A/D channel. For example, the QTC-250 RTD signal conditioning module has
eight input channels. Two QTC-250 modules may share one main A/D input channel to
provide 16 transducer input channels per main A/D channel. Multiplexing of all 16 main
A/D channels, (provided the A/D adapter type supports 16 channels), from the host
computer data acquisition adapter results in a maximum of 256 A/D transducer input
channels (16 x 16) per adapter.

1.1.4 Analog-to-Digital Converter (ADC)

The analog output si gnal from the tra nsducer is converted to di gital inf ormation by the ADC
in the data acquisition adapter in the host computer. Omega offers a complete line of data
acquisition adapters with both 12 and 16 bit resolution.

1.2 Hardware Description

SignalPro series modules come in several configurations. The QTC-100 is a self-contained

SignalPro Series Users Manual 13

power adapter module. The QTC-350 and QTC-450 are self contained interface boards with
BNC connectors. The remaining modules consist of two circuit boards: an interface board and
a removable terminal board. The interface boards are standard 3U size and easily mount in
the QTE-7 (seven modules), QTE-14 (fourteen modules) or QTC-xxx-PCS (one module) data
acquisition enclosures. The SignalPro terminal boards contain the transducer input screw
terminal blocks and most of the user configurable switches and jumper blocks. Figure 1-2
depicts a two board configuration with a single module data acquisition enclosure.

Terminal Box

QTC-250 Terminal Board

QTC-250 Interface Board

QTC-250-PCS Enclosure

SignalPro Series
Portable Signal Conditioning
System

Figure 1-2. SignalPro Portable Signal Conditioning System (QTC-250-PCS)

1.2.1 Interface Board Description

SignalPro i nterface board s operate with the following transducers and sensor s: thermocouple
(QTC-200/200T), RTD (QTC-250/250T), strain gage (QTC-300/300T), accelerometer
(QTC-350), voltage/current (QTC-400/400T) and analog signal filter (QTC-450). The
QTC-500/500T is a multipurpose interface board that provides isolated input signals utilizing
5B modules. The SignalPro DC voltage adapter module, QTC-100, provides a versatile means
to power signal conditioning modules mounted in the QTE-7 half rack housing unit using
automobile battery power. After the initial configuration and mounting of an interface circuit
board, it rarely requires removal from the QTE-7, QTE-14 or QTC-xxx-PCS enclosure. For
information on interface board data acquisition enclosures, see Chapter 2: SignalPro Series
Racks and Enclosures.

1.2.2 Terminal Board Description

SignalPro series modules QTC-200, 250, 300, 400 and 500 use the removable terminal board to

8

QTC-500

4

QTC-450

16

QTC-400

4

QTC-350

4

QTC-300

8

QTC-250

14

QTC-200

Number of Expansion

Signal Conditioning Module

SignalPro Series Users Manual 14

facilitate the quick connection of transducer lead wires. Lead wires easily attach to the screw
blocks on the portable terminal board. SignalPro series terminal boards slide into their own
protective enclosur e which connects externally to the inte rface board and is secur ed with two
thumb screws.

1.3 Hardware Configuration

For the purpose of this discussion, it is presumed the user is configuring the SignalPro signal
conditioning system using an Omega sixteen channel data acquisition adapter, product
number: DAQP-12 or DAQP-16 (PCMCIA) or DAQ-1201/02 (ISA).

1.3.1 Main A/D Channel Selection and Jumper Configuration

There are sixteen analog input channels on the main connector of a Omega data acquisition
adapter. Each analog input channel of the adapter can connect to either one signal
conditioning module or multiple modules of the same type and thus be expanded up to 16
signal condi tioning channel s. Th e number of mod ules that can be connected to a singl e analog
input channel varies depending on the number of expansion channels the specific module
supports. For example, the QTC-300 supports four expansion channels, so four modules can
be connected to one analog input channel (4 x 4 = 16). The QTC-250 supports eight expansion
channels, so two modul es can be connecte d to one anal og input channel (8 x 2 = 16 ). Ta ble 1-1
lists available expansion channels.

Channels Supported

Table 1-1. Expansion Channel Availability

SignalPro series modules can occupy any analog input channel on the data acquisition
adapter. Which channel the module(s) will occupy is dependent on the configuration of the
main A/D channel selection jumper. Note that if multiple modules occupy the same main
A/D channel, then each module must have the same jumper setting. Figure 1-3 depicts the
main A/D channel selection jumper. The factory default setting is channel zero (CH0) for all
SignalPro series modules installed in the QTC-xxx-PCS portable data acquisition enclosure.
For modules installed in the QTE-7 and QTE-14 rack enclosures, the factory default setting for
the main A/D channel jumper will vary depending on the number of modules in each system.
See section 1.3.3 for a system configuration example.

Main A/D C hannel Selection J umper

J1

QTC-500

J11

QTC-450

SignalPro Series Users Manual 15

CH0
CH1
CH2
CH3
CH4
CH5
CH6

CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15

Figure 1-3. SignalPro Series Main A/D Channel Selection Jumpers

The numerical designator for the main A/D channel jumper block varies from module to
module. Table 1-2 lists the designator for each specific module.

Signal Conditioning Module

Main A/D Channel

Jumper Designation

J1QTC-200
J10QTC-250
J5QTC-300
J15QTC-350
J1QTC-400

Table 1-2. Main A/D Channel Jumper Block Designators

1.3.2 Board Selection Jumper Configuration

Board selection jumper configuration options vary from module to module depending on the
number of expansion channels the module will support. Figure 1-4 depicts the board selection
jumpers with factory default settings and the numerical designator for each jumper block.
Note the factory default for all board selection jumpers is the lowest board number.

SignalPro Series Users Manual 16

Board Selection Jumper Configurations

QTC-250

QTC-300

(J9)

BD0

BD1

(J6)

BD0

BD1

BD2

BD3

QTC-500

QTC-350/450

(J2)

BD1

BD2

(J14/J9)

BD1

BD2

BD3

BD4

Figure 1-4. SignalPro Series Board Selection Jumpers

When configuri ng multiple Signa lPro modules to one main A/D channel, the position of the
board selection jumper will determine which module is connected to a specific numerical
section of the sixteen available expansion channels. For example, if two QTC-250 modules
were connected to one main A/D channel, the first QTC-250 module would use the “BD0”
configuration and would occupy expansion channels 0 - 7. The second QTC-250 module
would use the “BD1” configuration and would occupy expansion channels 8 - 15.

1.3.3 Expansion Channel Numbering

Figure 1-5 depicts the logical channel numbering for a signal conditioning system in which
four main A/D channels from the host computer data acquisition adapter are expanded. (The
QTC-200 module actually only has fourteen data acquisition channel s. Channels one and two
are utilized for cold junction and offset information).

QTC-200/QTC-250/QTC-300/QTC-300/QTC-300/QTC-300/QTC-350

SignalPro Series Users Manual 17

10
11
12
13
14
15

CH0

0
1
2
3
4
5
6
7
8
9

QTC-200

16
17
18
19
20
21
22
23

BD0

QTC-250

24
25
26
27

28
29
30
31

32
33
34
35

36
37
38
39

CH1

QTC-300

QTC-300

QTC-300

QTC-300

CH2

40
41
42
43

BD0

BD1

BD2

BD3

To Data Acquisition

adapter: DAQ P-12/16

or DAQ-1201/1202

QTE-7

015

44
45
46
47
48

CH3

Main A/D channels
unused. Channels 4 - 15
not multiplexed into
subchannels.

QTC-350

BD0

One QTC-200: 14 channels thermo couple input

One QTC -250: 8 channels RTD input
Four QT C-300s: 16 ch an nels strain gage input
One QTC -350: 4 channels acceler ometer i n put

49
50
51
52
53
54
55

Figure 1-5. Expansion Channel Numbering in a Multiple Module System

2 SignalPro™ Series Racks and Enclosures

Enclosure Features

SignalPro Series Users Manual 18



Flexibility to combine multiple types of modules in a single unit



Ruggedized aluminum, metal, and plastic enclosures



External trigger source input with BNC connector



Compatible with all SignalPro Series modules



Multiple enclosures can be linked together using only one data acquisition adapter for
up to 256 channels in a system.



Power can be supplied by a flexible range of either AC or DC voltage with appropriate
options installed

The SignalPro series interface boards are a standard 3U size and mount easily into the QTE-7,
QTE-14 or QTC-xxx-PCS data acquisition enclosures. Each of these enclosures is equipped
with a DIN -48 female connector(s) to mate with the interf ace boards and a standar d Omega
D-37 data acquisition connector which mates with the data acquisition adapter in the host
computer.

There are three housing options a vailable for Si gnalPro modules: (1) the QTE-14 rack mount
enclosure which holds up to 14 modules, (2) the QTE-7 half rack enclosure which holds up to
7 modules and (3) the QTC-xxx-PCS portable unit which accommodates a single module. (See
Figure 2-1).

QTE-7

QTC-xxx-PCS

QTE-14

Figure 2-1. SignalPro Series Data Acquisition Racks and Enclosures

2.1 Multiple Module Enclosures

Figure 2-2 shows the block diagrams for the QTE-7 and QTE-14 data acquisition enclosures.

SignalPro Series Users Manual 19

Data

Acquisition

Adapter

Power
Module

QTC-200
QTC-250

QTC-350
QTC-500

QTE-7 / QT E -14

QTC-200

QTC-200

QTC-200

QTC-200

QTC-300
QTC-400

QTC-450

QTC-300

QTC-300

......

QTC-300

QTC-300

Sensor

Sensor

Figure 2-2. Multiple Module Enclosure Block Diagram

SignalPro modules may be mounted into any slot in the data acquisition enclosures. (The
QTC-100 power adapter module will only mount in the first slot of the QTE-7 and are not
available for the QTE-14).

2.2 External Connections

2.2.1 Data Acquisition Adapter Connection

Each of the SignalPr o series enclosures is equipped with a D-37 female connector that is pin
compatible with Omega data acquisition adapters. Omega data acquisition adapters are
available with 12 and 16 bit resolution.

2.2.2 External TTL Trigger Connector

The data acquisition adapter in the host computer requires an initial signal to start A/D
conversions. Depending on the software configuration, A/D conversions will be initiated by
either a software trigger or an external hardware trigger. Each of the SignalPro series data
acquisition enclosures provides a BNC connector for a hardware TTL trigger input. The TTL
trigger starts A/D conversions on either the rising or falling edge of a TTL signal. The BNC
connector maps the TTL input back to pin 25, (digital input channel 0), on the Omega D-37
data acquisition adapter.

2.2.3 Multiple Enclosures

Multiple SignalPro series enclosures can be linked together using only one data acquisition
adapter to expand a signal conditioning system from sixteen up to 256 channels. An Omega
D-37 adapte r cable, prod uct number: CP-D AQ, is requ ired to link multiple enclosures in your
system.

2.3 Power Requirements

The QTE-7 and QTE -14 enclosures require an AC input voltage from 90 to 260 VAC @ 60 Hz.

5.22” (132.7mm)

9.39” (238.7mm)

17.68” (449.1mm)

QTE-14

5.22” (132.7mm)

9.39” (238.7mm)

9.28” (235.7mm)

QTE-7

1.56” (39.62mm)

8.78” (233.0mm)

5.57” (141.5mm)

QTC-xxx-PCS

Height

Depth

Width

SignalPro Enclosure

SignalPro Series Users Manual 20

With the QTE-7, the user has the option of using an Omega QTC-100 power module. The
power module allows the user to power a remote data acquisition system with automobile
battery power. The QTC-xxx-PCS requires a DC input voltage from 9 to 25 VDC and is
shipped with a 12v, 2.92A power supply module included.

All three enclosure models have a +5V and +/-15V DC power supply mounted inside the
enclosure to provide power for SignalPro series modules. The QTC-xxx-PCS internal power
supply automatically corrects the pola rity of the input vol tage to pr ovide maximum f lexi bility
in choosing a power source for the portable enclosure.

2.4 Physical Dimensions

Table 2-1 lists the physical dimensions of each enclosure in the SignalPro series.

Table 2-1. Data Acquisition Enclosure Physical Dimensions

3 QTC-100 DC Voltage Power Adapter Module

QTC-100 Features

SignalPro Series Users Manual 21



Standard 3U interface board for use with the QTE-7 half-rack housing unit



Supplies 25 watts of total power to the QTE-7



No polarity required on the DC input voltage - Center pin can be positive or negative



Power LED to indicate slot status



Optional power cord allows system to be powered from a standard automobile
cigarette lighter

The QTC-100 is a DC voltage power adapter module which provides a convenient way to
power SignalPro series modules using an automobile battery. For use with the QTE-7
half-rack housing unit, the QTC-100 accepts DC input voltage from 10 to 28vdc and generates

the +5 and ±15vdc output require d to powe r a remote d ata acquisi tion syste m. An optional six
foot cord, ( product number: QTC-PWR-DC), is availa ble to al low the user to gene rate system
power using a standard automobile cigarette lighter. (See Figure 3-1).

Power

Indicator

Power

Switch

Input Jack

DC 9~28V

Figure 3-1. QTC-100 DC Voltage Power Adapter Module

QTC-100 DC Voltage

QTE-7

Power Adapter

3.1 Circuit Board Description

The QTC-100 is a standard 3U size board designed for use with the QTE-7 half rack data

SignalPro Series Users Manual 22

acquisition enclosure. A block diagram of QTC-100 is shown in Figure 3-2. The DC to DC
converter accepts input voltage from 10 to 28vdc and in turn generates +5, +15 and -15vdc.
The 14-pin male power connector and the DIN-48 male connector on the QTC-100 interface
board will only connect to the first slot of the QTE-7.

14-Pin Power Connector

+5v, +/-15v

LED

Power
Switch

DC/DC

Converter

10~28 vdc

QTC-100

Figure 3-2. QTC-100 Block Diagram

3.1.1 AC/DC Power Supply Priority

With the QTC-100 DC Voltage Power Adapter Module, the QTE-7 half rack enclosure can
accept either AC power (90~260 vac) or DC power (9~28 vdc). If both power supplies are
available simultaneously, the QTE-7 will use AC power to generate the +5, +15 and -15VDC
power required for all SignalPro series modules in the QTE-7 system. If the AC power supply
is unavailable or failed, the QTE-7 will automatically switch to DC power from QTC-100
power module.

DIN-48

Connector

3.1.2 Power Jack and Switch

The QTC-100 power jack accepts 9~28vdc through a 2.5 x 5.5mm DC plug in which the center
pin can be either positive or negative. A push button switch on the front panel is used to
control power to the QTE-7 and a green LED indicates the power status. (Refer to Figure 3-1
for locations of the power jack, switch and indicator).

3.2 QTC-100 Specifications

0.3 Kg

Weight:

100mm X 166.4mm

Dimension:

500 VDC

Isolation:

50mV p-p (+5V), 100mV p-p (+/-15V)

Noise/Ripple:

0.25% (+5V), 3% (+/-15V)

Load Regulation:

0.25% for +5V, 2% for +/-15V

Line Regulation:

+5V+/-1%@3.50A, +15V+/-3%@0.50A, -15V+/-3%@0.50A

Output Voltage:

25 Watts

Total Power:

<100 mA p-p 80-85% typical

Input Ripple Current:

No Polarity required (Center pin can be either positive or

Input Polarity:
Suitable for 2.5 x 5.5mm DC plug

Power Jack:

DIN-48 male and 14-pi n right angle male, mates with fi rst slot

Connectors:

SignalPro Series Users Manual 23

of QTE-7

negative)

4 QTC-200 Thermocouple Input Module

QTC-200 Features

SignalPro Series Users Manual 24



Fourteen Thermocouple input channels



Up to 224 Analog Input Channels can be configured in a system



Thermocouple types J, K, T, E, S or R, N & B supported



On board Low Pass Filter for each channel (-80dB @ 50Hz)



Isolated Cold Junction Compensation



Terminal block for quick, easy signal connections

The QTC-200 is a fourteen channel thermocouple input module. Each channel is equipped
with a separate instrument amplifier, offset adjustment and low pass filter. Up to sixteen
QTC-200 modules can be configured in an Omega signal conditioning and data acquisition
system for a total of 224 analog input channel s. The QTC-200 can also be coupled with other
modules in Quatech’s SignalPro™ series to provide a versatile data acquisition system.

The QTC-200 module consists of two circuit boards: the QTC-200 interface board and the
QTC-200T terminal board. The interface board is a standard 3U size board which can be
mounted in the QTE-7, QTE-14 or QTC-200-PCS data acquisition enclosures. The QTC-200T
terminal board contains the thermocouple input screw blocks, Cold Junction Compensation
(CJC) sensor and the mode selection switches. This two board configuration allows quick and
easy connection of the thermocouple lead wires. After the initial configuration of the interface
board, it can be mounted in a data acquisition enclosure and will rarely require removal. All
connections are completed on the screw terminals of the portable QTC-200T, which is then
plugged into the interface board and secured using two thumb screws. (See Figure 4-1).

Thermocouple
Sensors

QTC-200 Terminal Board

Figure 4-1. QTC-200 Thermocouple Input Module

QTE-7

QTC-200 Interface Board

QTC-200-PCS

4.1 Circuit Board Description

SignalPro Series Users Manual 25

4.1.1 QTC-200 Interface Board Description

The QTC-200 interface board shown in Figure 4-1 can be mounted in SignalPro series data
acquisition racks and enclosures. (See Chapter 2 for information on SignalPro series racks).
Each rack enclosure i s equipped wi th a DIN-4 8 female connector which mate s to the QTC-200
and other SignalPro series signal conditioners. The rack also contains a standard Omega D37
connector which attaches to the host computer data acquisition adapter.

The QTC-200 provides sixteen channels; one channel for CJC input, one channel for zero offset
input and fourteen channels for thermocouple input; by multiplexing a single main A/D
channel off the host computer data acquisition adapter. The mul ti pl exer on the QTC-200 scans
the sixteen input channels sequentially and connects each input to the single main A/D
channel. The sixteen multiplexed input channels may be mapped back to any main A/D
channel on the data acquisition adapter depending on the configuration of jumper J1.
Multiplexi ng of all 16 main A/D channel s from the host computer results in a maximum of
256 channels consisting of 224 A/D input channels (14 x 16) and 32 CJC/zero offset input
channels (2 x 16) per data acquisition adapter.

4.1.2 QTC-200T Terminal Board Description

The QTC-200T terminal board contains the thermocouple input screw blocks and the mode
selection switches which configure either differential or single ended input for each channel.
The terminal board DIN-48 female connector plugs into the QTC-200 interface board and is
equipped with a strain relief bracket to secure external thermocouple wiring.

4.2 Hardware Configuration

SignalPro Series Users Manual 26

For system configuration options see Chapter 1: SignalPro Series Overview, section 1.3:
Hardware Configuration.

4.2.1 QTC-200 Interface Board Configuration

QTC-200

Main A/D Channel
Selection Jumper J1

CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15

Figure 4-2. QTC-200 Main A/D Channel Jumper Block Location

Figure 4-2 shows the location of the main A/D channel selection jumper block J1. System
configuration options for J1 are discussed extensively in Chapter 1, section 1.3

4.2.2 QTC-200T Terminal Board Configuration

Figure 4-3 depicts the location of the thermocouple input screw blocks, differential or
single-ended mode selection switches (SW1 and SW2), CJC sensor and the thermocouple lead
wire strain relief bracket.

ST1

SignalPro Series Users Manual 27

TC8

TC7

TC6

TC5

TC4

TC3

TC2

-

+

CJC

Sensor

-

+

-

+

-

+

-

+

-

+

-

+

TC9

TC10

TC11

TC12

TC13

TC14

TC15

-

+

-

+

-

+

-

+

-

+

SW2

-

+

-

+

QTC-200T

Figure 4-3. QTC-200T Terminal Board

SW1

O

N

1 2 3 4 5 6 7 8

O

N

1 2 3 4 5 6 7 8

4.2.2.1 Thermocouple Input Mode Selection Switches
Figure 4-4 depicts the mode selection switches for thermocouple input channels 2 through 15.

12345678

Thermocouple

12345678

Switch OFF (Open) - - - Differential Input
Switch ON (Closed) - - - Single Ended

All Switches shown with factory default setting:

OFF (Differential Input)

ON

ON

CH15
CH14
CH13
CH12
CH11
CH10
CH9
CH8

CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0

OFFSET
CJC

Figure 4-4. Thermocouple Input Mode Selection Switches