Omega 1002 User Manual

www.omega.com

e-mail: [e-mail]

User’s Guide

OME-PCI-1002

PCI Data Acquisition Board
Hardware Manual

Shop online at

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

www.omega.com [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

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, patient-connected applications.

Table of Contents

1. INTRODUCTION ................................................................................................................................. 5

1.1 GENERAL DESCRIPTION ............................................................................................................ 5

1.2 THE BLOCK DIAGRAMS................................................................................................................. 6

1.3 FEATURES .................................................................................................................................... 7

1.4 SPECIFICATIONS ........................................................................................................................... 8

1.4.1 Power Consumption ........................................................................................................... 8

1.4.2 Analog Inputs....................................................................................................................... 8

1.4.3 D/I and D/O ............................................................................................................................ 9

1.4.4 A/D Trigger Methods ............................................................................................................ 9

1.4.5 Interrupt Channel ................................................................................................................ 10

1.4.6 Programmable Timer/Counter ........................................................................................10

1.5 APPLICATIONS ............................................................................................................................ 11

1.6 PRODUCT CHECK LIST ............................................................................................................... 12

2. HARDWARE CONFIGURATION ................................................................................................... 13

2.1 BOARD LAYOUT ........................................................................................................................ 13

2.2 JUMPER SETTING ....................................................................................................................... 14

2.3 AD CALIBRATION...................................................................................................................... 14

2.4 SYSTEM BLOCK .......................................................................................................................... 15

2.5 DAUGHTER BOARDS.................................................................................................................... 16

2.5.1 OME-DB-1825....................................................................................................................... 16

2.5.2 OME-DB-8225..................................................................................................................... 16

2.5.3 OME-DB-37......................................................................................................................... 16

2.5.4 OME- DN-37 ........................................................................................................................16

2.5.5 OME-DB-16P Isolated Input Board...................................................................................... 17

2.5.6 OME-DB-16R Relay Board ................................................................................................. 18

2.6 ANALOG INPUT SIGNAL CONNECTION......................................................................................... 19

2.7 JUMPER SETTING ......................................................................................................................... 23

2.8 THE CONNECTORS ..................................................................................................................... 24

3. I/O REGISTERS ................................................................................................................................ 26

3.1 HOW TO FIND THE I/O ADDRESS................................................................................................ 26

3.2 THE I/O ADDRESS MAP ............................................................................................................... 28

3.2.1 Section 1............................................................................................................................... 29

3.2.2 Section 2............................................................................................................................... 30

4. FUNCTION OPERATION ................................................................................................................35

4.1 DIGITAL I/O ............................................................................................................................... 35

3

4.2 THE 8254 TIMER ........................................................................................................................36

4.3 THE A/D TRIGGER..................................................................................................................... 36

4.4 A/D CONVERSION ....................................................................................................................... 38

4.4.1 A/D Conversion Trigger Modes............................................................................................. 40

4.4.2 A/D Transfer Modes............................................................................................................... 40

4.4.3 Software trigger and Polling technique................................................................................. 41

5. SOFTWARE AND DEMO PROGRAM .......................................................................................... 44

6. DIAGNOSTIC PROGRAM ..............................................................................................................45

6.1 POWER-ON PLUG & PLAY TEST ................................................................................................45

6.2 DRIVER PLUG & PLAY TEST ...................................................................................................... 45

6.3 D I/O TEST ..................................................................................................................................46

6.4 A/D TEST................................................................................................................................... 46

4

1. Introduction

The OME-PCI-1002H/L card provides 12-bit ADC and two 16-bit digital I/O ports.

1.1 General Description

The OME-PCI-1002L and OME-PCI-1002H are high performance multifunction

cards, with A/D and digital I/O for PC and compatible computers in a 5V PCI slot. This

family has the following features: one 12-bit 110K A/D converter, 16 channels D/I, 16

channels D/O, programmable interrupt source and true “Plug and Play” support. The

OME-PCI-1002H/L provides 32 single-ended analog inputs or 16 differential analog

inputs, which are jumper selectable. The OME-PCI-1002L is the low-gain model

equipped with a high speed PGA (programmable gain amp.) with programmable gain

control of 1,2,4,8. The OME-PCI-1002H is the high-gain model equipped with a high-

gain/high-resolution PGA with programmable gain control of 1,10,100,1000. There are 16

channels of TTL compatible digital output and 16 channels of TTL compatible digital

input. This series provides three programmable trigger methods: software trigger, pacer

trigger and external trigger. The external trigger can be configured as a post-trigger, pre-

trigger or external pacer trigger. There are also several selectable interrupt sources: A/D

conversion interrupt, pacer interrupt and external interrupt. This multifunction card also

provides an A/D buffer and a data transfer rate of 2.7M words per second in non-burst

mode. This powerful A/D control mechanism offers flexibility for various applications

while minimizing system I/O overhead. The OME-PCI-1002 series is fully “Plug and

Play” compatible and can operate at the full speed of the PCI bus (33MHz). This

important feature makes the OME-PCI-1002 a high performance, cost effective solution

for most data acquisition applications.

5

1.2 Block Diagram

X86 System

S

B

U

PCI

PCI Interface System

Local System Controller

Interrupt

16 bits DI
16 bits DO

A/D control logic

Pacer

Generator

EPROM

Status

Control

Digital Inputs

Digital Outputs

4MHz

A/D

Data

Buffer

12-bit A/D
Converter

MuxGain

Figure 1-1. The OME-PCI-1002 series block diagram.

6

Analog Inputs

1.3 Features

• Bus: 5V PCI (Peripherals Component Interface) bus.

1. A/D:

• One A/D converter with maximum 110K samples/second.

• 32 single-ended / 16 differential programmable inputs for OME-PCI-1002L/H.

• Three different A/D trigger methods.

• Three different external trigger methods.

• Programmable gain control, programmable offset control.

2. DIO:

• 16 digital inputs and 16 digital outputs (TTL compatible).

• High-speed data transfer rate: 2.7M word/sec (non-burst mode).

3. Timer:

• One 16-bit machine independent timer for software (Timer 2).

• Two 16-bit pacer timer for A/D converter and interrupt (Timer0, Timer1).

7

1.4 Specifications

1.4.1 Power Consumption

• +5V @ 960mA maximum, OME-PCI-1002L/H

• Operating temperature : 0°C to +70°C

1.4.2 Analog Inputs

• Channels: ( software programmable )

• 32 single-ended inputs/16 differential inputs, jumper selectable.

• Gain control : ( software programmable )

OME-PCI-1002H, Gains - 1, 10, 100, 1000.

OME-PCI-1002L, Gains - 1, 2, 4, 8.

• Input signal range :

OME-PCI-1002L: Bipolar

Range: ±10, ±5V, ±2.5V, ±1.25V

OME-PCI-1002H: Bipolar

Range: ±10, ±1V, ±0.1V, ±0.01V

• Input current: 250 nA max (125 nA typical) at 25 °C.

• Over voltage: continuous single channel to

• Input impedance:

OME-PCI-1002H/L: 10

10

Ω // 6pF

70Vp-p

8

1.4.3 D/I and D/O

• Channels: 16 channels DI, 16 channels DO

• DO: Digital output port

Output level: TTL compatible

Output current: Ioh = 0.5mA, Iol = 8mA

• DI: Digital input port

Input level: TTL compatible

Input current: 50uA (max)

1.4.4 A/D Trigger Methods

• Trigger-methods :

1. Software trigger

2. Pacer trigger: 16-bit programmable timer/counter

3. External trigger: Pre-trigger, Post-trigger, external Pacer trigger

Pacer or software trigger

External trigger

CHn

CHn

Start End

Normal trigger mode

External trigger

t

Start End

Post-trigger mode

External trigger

CHn

CHn

External pacer trigger mode

t

End Start

Start End

Pre-trigger mode

t

t

Figure 1-2. Trigger methods of OME-PCI-1002.

9

1.4.5 Interrupt Channel

gger

• Interrupt: INTA (Automatically assigned by PCI-controller).

• Enable/Disable: Via PCI control register and add-on control register.

• Interrupt source: (Selected by on-board control register)

1. A/D conversion interrupt

2. Pacer 0 interrupt (Timer 0)

3. Pacer 1 interrupt (Timer 1)

4. External interrupt

1.

A/D busy

End of Conversion

IRQ

3.

Pacer 1

Falling edge of Pacer 1

IRQ

Figure 1-3. Programmable interrupt source.

2.

4.

Pacer 0

IRQ

External

Trigger

IRQ

Falling edge of Pacer 0

Falling edge of

External tri

1.4.6 Programmable Timer/Counter

• Type: 82C54-8 programmable timer/counter.

• Timers:

1. Timer 0 for Pacer trigger and interrupt

2. Timer 1 for External trigger and interrupt

3. Timer 2 for software machine independent timer

• Input Clock: 4 MHz.

10

1.5 Applications

z Signal analysis.

z FFT & frequency analysis.

z Transient analysis.

z Speech analysis.

z Temperature monitor.

z Vibration analysis.

z Energy management.

z Industrial and laboratory measurement and control.

Figure 1-4. OME-PCI-1002 series multifunction cards.

Signal Analysis

Temperature

Frequency

Other Laboratory

use

Multi-I/O signals

OME-PCI-1002

series

PCI interface

Single-task or multitask

Process Control

Transition

Speech Analysis

Vibration

Process Monitor

11

1.6 Product Check List

In addition to this manual, the package includes the following items:

• One OME-PCI-1002 card

• One CD-ROM

Release Notes

The release notes contain the latest information updates. We strongly suggest that you

read them first.

12

2. Hardware Configuration

2.1 Board Layout

OME-PCI-1002L

CON3

JP1

VR1

VR3

VR2

CON2CON1

Figure 2-1. OME-PCI-1002 board layout.

13

2.2 Jumper Setting

p

There is only one jumper on the OME-PCI-1002. JP1 is used to select

the analog input type. For single-ended inputs, users should connected pin 1, 3

and pin 2, 4. For differential inputs, Pin 3, 5 and Pin 4, 6 should be connected.

JP1 JP1

1

5 6

Single-ended

Inputs (Default)

2

1

5

Differential

2.3 A/D Calibration

• A/D Calibration for OME-PCI-1002 card

Step 1: Apply +10V to channel 0.

In

2

6

uts

Step 2: Apply +0V to channel 1.

Step 3: Apply -10V to channel 2.

Step 4: Run DEMO6.EXE.

Step 5: Adjust VR1 until channel 0 = fff or ffe

Step 6: Adjust VR2 until channel 1 = 800 or 801

Step 7: Adjust VR3 until channel 2 = 000 or 001

Step 8: Repeat Step 4 & Step 5 & Step 6 until all read

properly.

14

VR1, VR2, VR3

r

2.4 System Block Diagram

D/I

D/O

8254 Timer

A/D Buffer

Data

PCI

Interface

Controller

Ad

NVRA

controller

PCI BUS

Interrupt

controller

Dispatch

External Trigger

Figure 2-2. OME-PCI-1002 System Function Block.

A/D

Trigger

Logic

A/D

Converter

Multiplexers,

Gain Amp.

Scale Adj.

15

2.5 Daughter Boards

2.5.1 OME-DB-1825

The OME-DB-1825 is a daughter board designed for 32-channel AD cards such as

the OME-PCI-1002. Refer to the OME-DB-1825 user manual for details.

37pin cable

2.5.2 OME-DB-8225

The OME-DB-8225 provides a on-board CJC (Cold Junction Compensation)

circuit for thermocouple measurement and a terminal block for easy signal connection.

The CJC is connected to A/D channel_0. The OME-PCI-1002 can connect CON3 direct

to the OME-DB-8225 through a 37-pin D-sub connector. Refer to the OME-DB-8225

user manual for details.

2.5.3 OME-DB-37

The OME-DB-37 is a general purpose daughter board for boards with D-sub 37 pin

connectors. It is designed for easy wiring.

2.5.4 OME-DN-37

The OME-DN-37 is a DIN rail mount general purpose daughter board for boards with

D-sub 37 pin connectors. It is designed for easy wiring.

37pin cable

16

2.5.5 OME-DB-16P Isolated Input Board

The OME-DB-16P is a 16-channel isolated digital input daughter board. The

optically isolated inputs of the OME-DB-16P consist of a bi-directional optocoupler with

a resistor for current sensing. You can use the OME-DB-16P to sense DC signal from

TTL levels up to 24V or use the OME-DB-16P to sense a wide range of AC signals. You

can use this board to isolate the computer from large common-mode voltage, ground

loops and transient voltage spike that often occur in industrial environments.

17

2.5.6 OME-DB-16R Relay Board

The OME-DB-16R, 16-channel relay output board consists of 16 form C relays that

can be switched under program control. Applying 5 volts to the appropriate relay channel

through the 20-pin flat connector can energize the relays. Each relay has its own LED that

will light when the relay is energized. To avoid overloading your PC’s power supply, the

board provides screw terminals for external power.

Note: Channel: 16 Form C Relay

Relay: Switching up to 0.5A at 110ACV or 1A at 24 DCV

18

2.6 Analog Input Signal Connection

The OME-PCI-1002 can measure signals in the single-ended or differential mode.

In the differential mode each channel has a unique signal HIGH and signal LOW

connection. In the single-ended mode all channels have a unique signal HIGH connection

but share a common LOW or ground connection. Differential connections are very useful

for low level signals (millivolt), since they better reject electrical noise that can affect the

quality of the measurement. A differential connection is also necessary when a common

ground is unacceptable. The benefit of using a single-ended connection is that twice the

number of channels is available. In general, a single-ended connection is often a good

choice when working with higher level signals (5V or 10V for example), especially if the

signal is coming from an isolated device such as a signal conditioner. Several different

types of wiring diagrams are discussed below.

Figure 2-3A shows a differential connection to a grounded source. If the source is

grounded, making a second connection to the card’s ground could cause a ground loop

resulting in erroneous data. It is important to note that the maximum common mode

voltage between the input source and AGND is 70Vp-p. If the card is connected to a

source with a common mode voltage greater than 70Vp-p, the input multiplexer will

be permanently damaged! When measuring common mode voltage, it is best to use an

oscilloscope rather than a multi-meter.

Figure 2-3B shows a differential connection to a floating source. In such cases a

connection should be made between the low channel input and analog ground.

Figure 2-4 shows connection of multiple sources in single-ended mode. This

connection assumes creating one common ground will not cause a problem. This is

normally the case when connecting to devices that are isolated or floating.

Figure 2-5 demonstrates how to connect bridge transducers. Bridge transducers

include strain gauges, load cells and certain type of pressure transducers. The diagram

assumes that there is a single external power supply providing power to the bridge. Each

bridge is connected to a differential channel. No connection is made between channel

low and analog ground. A connection should be made between analog ground and the

negative of the power supply. An isolated power supply is strongly suggested.

Figure 2-6 demonstrates how to connect a 4-20mA current loop. Since the card

reads voltages, the current is converted to voltage by passing it through a shunt resistor.

By Ohms law (V=IR), when using a 250Ω resistor, 4 mA will be converted to 1V and
20mA to 5V. If the source is linear, the output voltage range will also be linear.

19

Figure 2-3A

If the source is grounded, a second ground connection
on the card could result in a ground loop.

Figure 2-3B

20

Figure 2-4

Figure 2-5

21

Figure 2-6

R is a shunt resistor. A 250Ω shunt resistor converts 4-20mA to 1-5Vdc.

Signal Shielding

z The signal shielding connections in Figure 2-3 to Figure 2-6 are all the same

z Use a single connection to frame ground (not A.GND or D.GND)

Vin

OME-PCI-1002

A.GND

D.GND

Frame Ground

22

p

2.7 Jumper Settings

There is only one jumper on the OME-PCI-1002. JP1 is used to select

the analog input type. For single-ended inputs, users should connect Pin-1, 3

and Pin-2, 4. For differential inputs, Pin-3, 5 and Pin-4, 6 should be

connected.

JP1 JP1

1

5 6

Single-ended

Inputs (Default)

2

1

5

Differential

In

uts

2

6

23

2.8 The Connectors

CON1: Digital output connector pin assignment.

Pin Name Pin Name

1 Digital output 0 2 Digital output 1

3 Digital output 2 4 Digital output 3

5 Digital output 4 6 Digital output 5

17 Digital output 6 8 Digital output 7

9 Digital output 8 10 Digital output 9

11 Digital output 10 12 Digital output 11

13 Digital output 12 14 Digital output 13

15 Digital output 14 16 Digital output 15

17 PCB ground 18 PCB ground

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20

19 PCB +5V 20 PCB +12V

CON2: Digital input connector pin assignment.

Pin Name Pin Name

1 Digital input 0 2 Digital input 1

3 Digital input 2 4 Digital input 3

5 Digital input 4 6 Digital input 5

17 Digital input 6 8 Digital input 7

9 Digital input 8 10 Digital input 9

11 Digital input 10 12 Digital input 11

13 Digital input 12 14 Digital input 13

15 Digital input 14 16 Digital input 15

17 PCB ground 18 PCB ground

19 PCB +5V 20 PCB +12V

24

CON3: Analog input/output connector pin assignment. (For OME-PCI-1002H/L)

Pin Name Pin Name

1 Analog input 0/0+ 20 Analog input 16/0-

2 Analog input 1/1+ 21 Analog input 17/1-

3 Analog input 2/2+ 22 Analog input 18/2-

4 Analog input 3/3+ 23 Analog input 19/3-

5 Analog input 4/4+ 24 Analog input 20/4-

6 Analog input 5/5+ 25 Analog input 21/5-

7 Analog input 6/6+ 26 Analog input 22/6-

8 Analog input 7/7+ 27 Analog input 23/7-

9 Analog input 8/8+ 28 Analog input 24/8-

10 Analog input 9/9+ 29 Analog input 25/9-

11 Analog input

10/10+

12 Analog input

11/11+

13 Analog input

12/12+

14 Analog input

13/13+

15 Analog input

14/14+

16 Analog input

15/15+

17 Analog ground 36 N.C.

18 N.C. 37 Digital ground

19 External trigger

30 Analog input 26/10-

31 Analog input 27/11-

32 Analog input 28/12-

33 Analog input 29/13-

34 Analog input 30/14-

35 Analog input 31/15-

Notes:

1. When configured for differential inputs (JP1 3-5, 4-6), Pins 1-16 are the

positive inputs and Pins 20-35 are the negative inputs.

2. N.C. = No Connection

25

3. I/O Registers

3.1 How to Find the I/O Address

The Plug & Play BIOS will assign a valid I/O address to all OME-PCI-1002 cards in

the system during the computer’s power-on stage. The ID numbers of OME-PCI-1002

are shown below:

• Vendor ID = 1234

• Device ID = 1002

Associated Driver Functions:

1. P1002_DriverInit(&wBoard)

This function detects the number of OME-PCI-1002 cards in the system.

• wBoard=1 Æ only one OME-PCI-1002 in this PC system.

• wBoard=2 Æ there are two OME-PCI-1002 in this PC system.

2. P1002_GetConfigAddressSpace(wBoardNo, *wBase, *wIrq, *wPLX)

Use this function to determine the resources for all cards installed in the system.

This is used when writing directly to the card’s I/O addresses.

• wBoardNo=0 to N Æ totally N+1 cards of OME-PCI-1002

• wBase Æ base address of the board control word

• wIrq Æ allocated IRQ channel number of this board

• wPLX Æ base address of PCI-interface-IC

26

The sample program code is shown below:

/* Step1: Detect all OME-PCI-1002 card first */

wRetVal=P1002_DriverInit(&wBoards);

printf("There are %d OME-PCI-1002 Cards in this PC\n",wBoards);

/* Step2: save resource of all OME-PCI-1002 cards installed in this PC */

for (i=0; i<wBoards; i++)

{

P1002_GetConfigAddressSpace(i,&wBase,&wIrq,&wPLX);

printf("\nCard_%d: wBase=%x, wIrq=%x, wPLX=%x", i,wBase,wIrq,wPLX);

wConfigSpace[i][0]=wBaseAddress; /* save all resource of this card */

wConfigSpace[i][1]=wIrq; /* save all resource of this card */

wConfigSpace[i][2]=wPLX; /* save all resource of this card */

}

/* Step3: control the OME-PCI-1002 directly */

wBase=wConfigSpace[0][0]; /* get base address the card_0 */

outpw(wBase+0x20,wDoValue); /* control the D/O states of card_0 */

wDiValue=inpw(wBase+0x20); /* read the D/I states of card_0 */

wBase=wConfigSpace[1][0]; /* get base address of card_1 */

outpw(wBase+0x20,wDoValue); /* control the D/O states of card_1 */

wDiValue=inpw(wBase+0x20); /* read the D/I states of card_1 */

wPLX=wConfigSpace[2][2]; /* get PCI-interface base address of card-2 */

_outpd(wPLX+0x4c,0x41); /* channel_1, interrupt active_Low */

…
…
…
_outpd(wPLX+0x4c,0); /* disable all interrupts */

27

3.2 The I/O Address Map

The OME-PCI-1002 registers are given below. The address of each register

is determined by adding the offset to the base address of the corresponding

section.

Section Offset Name Access Length

1 4ch

2

00h 8254 timer1 R/W 8/16/32 bits

04h 8254 timer2 R/W 8/16/32 bits

08h 8254 timer3 R/W 8/16/32 bits

0Ch 8254 control register W 8/16/32 bits

10h

10h Status register R 8/16/32 bits

14h

18h

1Ch A/D software trigger W 8/16/32 bits

1Ch Clear Interrupt R 8/16/32 bits

20h Digital output register W 16/32 bits

PCI interrupt control

Analog input channel

register

control register

Analog input gain

control register

General control

register

R/W 8/16/32 bits

W

W 8/16/32 bits

W

8/16/32 bits

8/16/32 bits

20h Digital input register R 16/32 bits

30h A/D data register R 16/32 bits

28

3.2.1 Section 1

Although there are 128 I/O ports used by the on-board PCI interface

controller, only one register is used for most applications. The user should

not modify the other registers! The PCI interrupt control register (4Ch)

controls the interrupts generated by the system. The register is set to “disable

interrupt” after power-on or hardware reset signal, thus no interrupts will be

generated before this register is activated even if the user enables the add-on

interrupt! In order to enable the PCI-interrupt, write 43h to this register. Write

03h to this register if you want to disable the PCI interrupts.

Following is the format of the PCI interrupt control register:

Bit 31-Bit 7 Bit6 Bit5-Bit3 Bit2 Bit1-Bit0

Not used Interrupt Enable Not used Interrupt Flag Interrupt Select

Bit 6: Write an ‘1’ to enable the PCI-interrupt and a ‘0’ to disable PCI interrupt.

Bit 2: This bit is read-only. A ‘1’ indicates that the Add-on has

generated an interrupt, ‘0’ means that Add-on did not generate an interrupt.

Bit1-0: Always write 1 to these two bits.

Note:

1. Since the OME-PCI-1002 supports “Plug and Play”, the interrupt

number will automatically be assigned by your system. The user can

determine the interrupt number by using standard PCI utilities or by

using the OME-PCI-1002 software driver.

2. If your system supports “Shared IRQ”, several peripherals may

share the same IRQ at the same time. You must use Bit-2 to find out

if an IRQ was generated from the OME-PCI-1002 or a different

device!

3. For more information about the PCI interrupt control, please refer to

the user reference manual of the PLX-9050.

29

3.2.2 Section 2

This group of registers is used by the add-on control logic. 64 bytes of

I/O locations are used. Their detailed descriptions are shown below

3.2.2.1 The 8254 Registers

The 8254, programmable timer/counter, is used to generate periodic

interrupts, A/D trigger and the machine independent timer. Addresses 00h,

04h, 08h and 0Ch are used to program the 8254.

Timer 0 is used as Pacer 0 and timer 1 is used as Pacer 1. Timer 2 is used

as the machine independent timer (P1002_Dealy() function). Refer to Intel’s

“Microsystem Components Handbook” for detailed programming information.

3.2.2.2 The DI / DO Register

Address 20h is used for DI / DO ports. Write to this port to send data to

the DO register. Read from this port to input DI data.

3.2.2.3 The A/D Buffer

Address 30h is used for the A/D buffer. This is a read-only address.

Reading from this port will return the data from A/D buffer. The format of A/D

buffer is:

Bit15-12 Bit11-0

Analog input

channel

A/D data

Bit15-12: The channel number of the analog input. Only lower 4 bits of

channel number are shown in this register.

Bit11-0: The A/D data.

30

3.2.2.4 The Status Register

Address 10h is used is the status register. Reading from this address will

return the data from the status register. The format of status register is:

Bit7-6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

Gain

Control

Bit 7-6: Current A/D gain control.

Bit 5 : Output of 8254 timer 1.

Bit 4 : Output of 8254 timer 0.

Bit 3 : Output of 8254 timer 2.

Bit 2 : Reserved. Used for hardware testing.

Bit 1 : Analog input type, ‘1’ indicated that analog input type is single-

Bit 0 : A/D busy signal. ‘0’ indicates busy, A/D is under conversion. ‘1’

8245

Timer 1

ended and ‘0’ indicated analog input is differential.

indicates not busy, A/D is complete conversion and is idle now.

8245

Timer 0

8245

Timer 2

Reserved

Analog

input type

3.2.2.5 The A/D Software Trigger Register

Writing to port 1Ch will generate an A/D trigger signal.

A/D Busy

Note: Since the user can trigger at a rate greater than the speed of A/D converter

(125K), a delay time may be required between successive software triggers

Software
trigger

A/D
Busy

Figure 3-1. Software triggered delay time.

Delay time

8 µs

Conversion Time

31

3.2.2.6 Clear Interrupt

Reading from 1Ch will clear the add-on interrupt.

3.2.2.7 The Analog Input Selection Register

The analog input channel selection register uses address 10h and

address 14h is used by the analog gain control selection register. Write 0-31 to

port 10h to select the channel number (for differential input, write 0-15).

Write 0-3 to port 14h to select the gain control.

Analog inputs

Analog

…

Mux.

Select

…

Channel select

AMP

Gain control

ADC

Figure 3-2. Analog input control.

Note:

1. For single ended inputs, channels 0-31 are available. For

differential inputs, channels 0-15 are available. If you enter a

channel number greater than the number available, those channels

will be ignored. Thus, for single-ended inputs, only the last 5 bits

are taken as the channel number. And for differential inputs, only

the last 4 bits are taken as the channel number.

2. Only the last two digits are used as the gain control code. The gain

control codes and corresponding gains are shown below :

For OME-PCI-1002L:

Gain code [0 0] [0 1] [1 0] [1 1]

Gain 1 2 4 8

32

For OME-PCI-1002H:

[Bit1,Bit0] [0 0] [0 1] [1 0] [1 1]

Gain 1 10 100 1000

3. These registers are set to 0 after power-on or a hardware reset signal.

3.2.2.8 The General Control Register

The general control register (18h) is used to control the add-on interrupt

source and the A/D trigger method. The format of this register is:

Bit4-2 Bit 1-0

Interrupt source

selection register

A/D trigger method

selection register

3.2.2.8.1 Interrupt Source Selection

There are four interrupt sources selectable for the OME-PCI-1002 (see

section 1.4.4).

[Bit4,Bit3,Bit2] Description

[ 0, 0, 0 ] No interrupt source, disable all interrupts.

[ 0, 0, 1 ] Interrupt after A/D conversion completes.

[ 0, 1, 0 ] Interrupt after 8254 timer 0 falling.

[ 0, 1, 1 ] Interrupt after external trigger falling.

[ 1, 0, 0 ] Interrupt after 8254 timer 1 falling.

Others No interrupt source, disable all interrupts.

Note: Bit 3-3 of general control register is set to 0 after a hardware reset.

33

3.2.2.8.2 Trigger Method Selection

There are several trigger methods that can be selected by the user (see

section 1.4.5):

[Bit1,Bit0 ] Descriptions

[ 0, 0 ] General trigger mode.

8254 timer 0 trigger (internal pacer trigger ) or software

trigger.

[ 0, 1 ] External clock trigger mode.

[ 1, 0 ] Pre-trigger mode.

[ 1, 1 ] Post-trigger mode.

Note:

1. In the general trigger mode, both the 8254 timer 0 and the software

trigger are used as the A/D trigger signals. The timer 0 and the software

trigger should not be used at the same time! This means the user

should not generate a software trigger while the 8254 timer 0 is

activated!

2. In the external clock trigger mode, an external input is taken as the A/D

trigger signal. A single falling edge of the external trigger will generate

a single A/D trigger.

3. The pre-trigger mode employs the 8254 timer 1. The user should first

configure timer 1, then set the trigger mode to pre-trigger. Once the

pre-trigger mode has been activated, it will automatically turn on timer

1 and start the A/D trigger. This will continue until a falling edge from

an external trigger signal is received. Any change to the trigger mode

selection will turn off the pre-trigger mode.

4. The post-trigger mode employs the 8254 timer 1. The user should first

configure timer 1, then set the trigger mode to post-trigger. Once the

post-trigger mode has been activated, it will automatically turn off the

timer 1 until it receives a falling edge from an external signal. Any

change to the trigger mode selection will turn off the post-trigger mode.

5. The A/D trigger selection is set to 0 after power-on or hardware reset.

34

4. Function Operation

4.1 Digital I/O

The OME-PCI-1002 series provides 16 digital input channels and 16 digital

output channels. All signals are TTL compatible. The connector and block diagrams

are given below:

Figure 4.1. DIO function diagram.

BaseAddr+20h

read signal.

BaseAddr+20h

write signal

Local Data Bus

D0 ... D15

CN2

DI port

DO port

CN1

35

4.2 The 8254 Timer

K

The OME-PCI-1002 series provide 3 independent 16-bit

timer/counters. Each timer has a different function. Timer 0 is used as

Pacer 0. Timer 1 is used as Pacer 1. Timer 2 is used as the machine

independent timer. The block diagram is given as follows:

VCC

4 M Hz

EN

CL

Timer 0

OUT1

Local Data Bus

D0…D7

User

EN

CLK

Timer 1

OUT2

8254

Timer

EN

OUT3

Figure 4-2. 8254 Block Diagram.

4.3 The A/D trigger

Pacer 0

Pacer 1

Status

The block diagram of the A/D trigger is shown below:

8254

Timer 0

Software Trigger

External

Trigger.

0
1

PR

D

Q

RS

Figure 4-3. A/D Trigger Controller.

External Trigger

EN
CLK

8254

Timer 1

4M-Hz

36

Mux

Select

Trigger Select

To A/D

The A/D trigger logic can initiate an A/D conversion upon an

external trigger. Valid external trigger signals must be TTL compatible

and meet minimum pulse width requirements. The requirements are shown

below:

External trigger

du

tre t

Symbol Name Minimum Maximum

Tdu

Tre

Duration time 40ns

Recover time 100ns

∞

∞

Note: The OME-PCI-1002 is designed only for time sensitive triggers

(trigger is dependent only on the time of the falling edge of

signal). For a level sensitive external trigger (trigger is dependent

on the level of the input signal), the user can build the following

external circuit the OME-PCI-1002:

Input Signal

OME-PCI-

1002 D/O

DAC

Comparator

External
Trigger

TTL buffer

37

4.4 A/D Conversion

An A/D conversion can be initiated three different ways: software command, internal

programmable interval timer or external trigger. At the end of the A/D conversion, it is

possible to transfer the data by polling a status register and reading the data when ready or

by generating a hardware interrupt and an interrupt service routine. All modes are selected

by a control register on the OME-PCI-1002 and are supported by the utility software.

Below are key points for successfully collecting A/D data:

z A/D data register, BASE+30h, stores the A/D conversion data.

z A/D data conversion ready register, BASE +10h. Check if A/D data is ready.

z A/D gain control register, BASE+14h, select gain.

z A/D multiplexer control register, BASE+10h, select analog input

channel.

z A/D mode control register, BASE+0Ch, select trigger type and transfer type.

z A/D software trigger control register, BASE+1Ch.

z JP1 select single-ended or differential input.

z 3 Triggers: Software, Pacer, and External trigger.

z 2 Transfer Modes: Polling and Interrupt.

The block diagram is given follows:

CN3

OME-PCI-1002H/L

16/8 to 1

Multi-

plexer

BASE+10h BASE+14h Trigger

Gain

Control

12 bits

A/D

Logic

BASE+1Ch

Software Trigger

Buffer

BASE+30h

Memory

CPU

38

Before performing A/D conversions, the JP1 jumper should be set for single-ended or

differential.

The software driver supports both polling and interrupt driven A/D, however, polling

is the simplest way to perform an A/D conversion.

The settling time of multiplexer depends on the impedance of the signal source.

Because the driver does not incorporate the settling time, the user needs to program a

delay when switching from one channel to another or when changing gains.

Suggested Settling Times

One settling time is suggested for all ranges of the OME-PCI-1002L. The settling time

for the OME-PCI-1002H is based on the analog input range. The table below shows the

suggested settling times for each range.

OME-PCI-1002L Settling Time: 33 µseconds for all ranges

OME-PCI-1002H Settling Time

Input Range Settling Time

± 10V 23 µS

± 5V 28 µS

± 0.1V 140 µS

± 0.01V 1300 µS

The software driver provides a machine independent timer, P1002_Delay(), for

settling time delay. If the user calls P1002_Delay(), counter 0 will be reserved and can

not be used as a user programmable timer/counter.

The A/D converter requires a trigger signal to start an A/D conversion cycle. The

OME-PCI-1002 supports three trigger modes, software, pacer and external trigger.

39

4.4.1 A/D Conversion Trigger Modes

The OME-PCI-1002 supports three trigger modes.

1 : Software Trigger :

Write any value to A/D software trigger control register, BASE+1Ch, will initiate a

A/D conversion cycle. This mode is very simple but very difficult to control

sampling rate.

2 : Pacer Trigger Mode :

The block diagram of pacer timer is shown in section 3.2. The sample rate of pacer

is very precise.

3 : External Trigger Mode :

When a rising edge of external trigger signal is applied, an A/D conversion will be

performed. The external trigger source comes from Pin-17 of CON3.

4.4.2A/D Transfer Modes

OME-PCI-1002 supports two transfer modes.

1 : polling transfer :

This mode can be used with all trigger modes. You must disable timer 0 before

polling. The A/D data can be read from the register at BASE+30h. Before reading

the data first check the A/D ready bit at register BASE +10h READY_BIT=0.

2 : interrupt transfer:

This mode can be used with the pacer trigger or an external trigger. A hardware

interrupt signal is sent to the PC when an A/D conversion is completed.

For interrupt transfer, the use of the driver software is strongly recommended.

40

Software Trigger and Polling Techniques

The steps below should be followed for software triggering and polling:

1. Send 00h to A/D mode control register (software trigger + polling transfer)

2. Send channel number to multiplexer control register.

3. Send the gain control code value to gain control register.

4. Send any value to software trigger control register to generate a software trigger

signal.

5. Scan the READY bit of the A/D high byte data until READY=0

6. Read the 12 bits A/D data.

7. Convert the 12 bits binary data to the floating point value.

For example:

/* ------------------------------------------------------------- */

/* DEMO 3: AdPolling */

/* Compiler: Borland C++ 3.1, Mode Large */

/* Output Code: HEX code */

/* -------------------------------------------------------------- */

#include "P1002.H"

WORD wBaseAddr,wIrq;

//-------------------------------------------------------

WORD P1002_Delay(WORD wDownCount)

{

WORD h,l;

int count;

wDownCount &= 0x7fff;

if (wDownCount<1) wDownCount=1;

/* Clock in=4M --> count 4000 = 1 ms, count 1 = 0.25 us */

l=wDownCount&0xff;

wDownCount=wDownCount / 256;

h=wDownCount&0xff;

outp(wBaseAddr+3*4,0xB0); /* mode_0, counter_2 */

outp(wBaseAddr+2*4,l); /* counter_2 low byte first */

outp(wBaseAddr+2*4,h); /* counter_2 high byte ,0x07D0=2000 */

outp(wBaseAddr+3*4,0x80); /* latch counter_2 */

41

l=inp(wBaseAddr+2*4); /* delay starting two clks */

h=inp(wBaseAddr+2*4);

for (count=32767;count>0;count--){

outp(wBaseAddr+12,0x80); /* latch counter_2 */

l=inp(wBaseAddr+8);

h=inp(wBaseAddr+8);

if (h>=0x80) return NoError;

}

return TimeOut;

}

//--------------------------------------------------------

void AdPolling(UCHAR channel, UCHAR gain, WORD delay)

{

outp(wBaseAddr+0x18,0); // Select Mode 0

outp(wBaseAddr+0x10,channel);

outp(wBaseAddr+0x14,gain);

P1002_Delay(delay);

outp(wBaseAddr+0x1c,01); // A/D software tirgger

}

void SetupTimer(WORD wChannel, WORD wCoef)

{

WORD cmd;

wChannel=wChannel&0x03;

cmd=0x34+(wChannel<<6);

outpw(wBaseAddr+3*4, cmd);

outp(wBaseAddr+wChannel*4, (UCHAR)(wCoef&0xff));

outp(wBaseAddr+wChannel*4, (UCHAR)(wCoef>>8));

}

//=========================================================

void main()

{

int i,j;

WORD wBoards,wRetVal,wPLX;

WORD Drdy,wAdData=0;

42

char c;

clrscr();

P1002_DriverInit(&wBoards);

printf("\n(1) Threr are %d OME-PCI-1002 Cards in this PC",wBoards);

if ( wBoards==0 )

{

putch(0x07); putch(0x07); putch(0x07);

printf("(1) There are no OME-PCI-1002 card in this PC !!!\n"); exit(0);

}

printf("\n(2) Show the Configuration Space of all OME-PCI-1002:");

for(i=0; i<wBoards; i++)

{

P1002_GetConfigAddressSpace(i,&wBaseAddr,&wIrq,&wPLX);

printf("\n Card_%d: wBaseAddr=%x, wIrq=%x, wPLX=%x",i,wBaseAddr,wIrq,wPLX);

}

P1002_GetConfigAddressSpace(0,&wBaseAddr,&wIrq,&wPLX); /* select card_0 */

printf("\n(3) *** Card_0, wBaseAddr=%x ***\n",wBaseAddr);

SetupTimer(0,1); // AdPolling have to disable timer 0

AdPolling(0,0,23); // channel=0, gain=+/-10, delay=23us

for(i=0;i<10;i++)

{

outp(wBaseAddr+0x1c,01); // A/D software tirgger

while(1)

{

if( ((inpw(wBaseAddr+0x10))&0x01)==1) // check A/D busy?

break;

}

wAdData=((inpw(wBaseAddr+0x30))&0x0fff);

printf("\nRang:+/-10V, Counter %d ,ADC channel 0 value: 0x%xH",i,wAdData);

}

P1002_DriverClose();

}

43

5. Software and Demo Program

1. Demo programs for DOS

• …\1002\BC\LARGE\DEMO> ← demo program

• …\1002\BC\LARGE\LIB> ←library and driver

• DEMO1: Digital output.

• DEMO2: Digital output and Digital input test by itself.

• DEMO3: A/D Polling for channel 0.

• DEMO4: A/D Polling for channel 0,1,2,3 and defferent gain 1,2,4,8.

• DEMO5: A/D Pacer trigger.

• DEMO6: A/D Calibration.

• DEMO7: Find card number.

2. Demo program for Windows95/98/NT

• Refer to CD-ROM.

44

6. Diagnostic Program

6.1 Power-ON Plug & Play Test

Below are the steps for the power-on Plug & Play test:

Step 1: Power-off the PC

Step 2: Install OME-PCI-1002 without any extra external connections

Step 3: Power-on the PC and watch the PC screen very carefully

Step 4: The PC will perform its self-test first

Step 5: The PC will detect the non-PCI physical devices installed in the system

Step 6: The PC will display the information for these devices

Step 7: The PC will detect the PCI Plug & Play devices installed in the system

All PCI-device information will be shown Æ pay careful attention

Æ There will be a PCI device with vendor_ID=1234, device_ID=1002 (OME-PCI-

1002)

If the Plug & Play ROM-BIOS successfully detects the OME-PCI-1002 card during

the power-on state, the DOS and Windows software driver will also be able to detect the

card. If the Plug & Play ROM-BIOS can not find the OME-PCI-1002, the software driver

will not function. Therefore the user must make sure that the power-on detection is

correct.

6.2 Driver Plug & Play Test

Step 1: Power-off the PC.

Step 2: Install OME-PCI-1002 without any extra external connector.

Step 3: Power-on PC and run DEMO7.EXE.

Step 4: The I/O base address of all OME-PCI-1002 cards installed in the system will be

displayed.

Step 5: Verify that the total number of boards is correct

Step 6: If more than one card, install a 20-pin flat cable on one of the OME-PCI-1002

45

cards.

Step 7: If a card’s D/O=D/I Æ this is the physical card number, remember this number.

Step 8: Repeat the previous two steps to find the physical card number of all boards.

6.3 D I/O Test

Step 1: Power-off the PC.

Step 2: Install one OME-PCI-1002 card with a 20-pin flat cable between CON1 & CON2.

Step 3: Power-on the PC then run DEMO2.EXE.

Step 4: The DO and DI are displayed as TEST OK or TEST ERROR.

6.4 A/D Test

• A/D Test for OME-PCI-1002 card

Step 1: Power-off the PC.

Step 2: Install one OME-PCI-1002 card.

Step 3: Power-on PC, run DEMO6.EXE

Step 4: Apply +10V to channel 0.

Step 5: Apply +0V to channel 1.

Step 6: Apply -10V to channel 2.

Step 7: Run DEMO6.EXE.

Step 8: Check channel 0 = fff or ffe?

Step 9: Check channel 1 = 800 or 801?

Step 10: Check channel 2 = 000 or 001?

46

WARRANTY/DISCLAIMER

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

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately 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’sWARRANTY does not apply to defects resulting from any action of the purchaser, includ­ing but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in suc h a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

FOR W

ARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number under whic h 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.

FOR NON-WARRANTY REPAIRS,

consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2002 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

M3927/0203

Where Do I Find Everything I Need for

Process Measurement and Contr ol?

OMEGA…Of Course!

Shop online at www.omega.com

TEMPERA TURE



Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies



Wire: Thermocouple, RTD & Thermistor



Calibrators & Ice Point References



Recorders, Controllers & Process Monitors



Infrared Pyrometers

PRESSURE, STRAIN AND FORCE



Transducers & Strain Gages



Load Cells & Pressure Gages



Displacement Transducers



Instrumentation & Accessories

FLOW/LEVEL



Rotameters, Gas Mass Flowmeters & Flow Computers



Air Velocity Indicators



Turbine/Paddlewheel Systems



Totalizers & Batch Controllers

pH/CONDUCTIVITY



pH Electrodes, Testers & Accessories



Benchtop/Laboratory Meters



Controllers, Calibrators, Simulators & Pumps



Industrial pH & Conductivity Equipment

DA TA ACQUISITION



Data Acquisition & Engineering Software



Communications-Based Acquisition Systems



Plug-in Cards for Apple, IBM & Compatibles



Datalogging Systems



Recorders, Printers & Plotters

HEA TERS



Heating Cable



Cartridge & Strip Heaters



Immersion & Band Heaters



Flexible Heaters



Laboratory Heaters

ENVIRONMENT AL
MONITORING AND CONTROL



Metering & Control Instrumentation



Refractometers



Pumps & Tubing



Air, Soil & Water Monitors



Industrial Water & Wastewater Treatment



pH, Conductivity & Dissolved Oxygen Instruments