Teledyne 6000A User Manual

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Photometric Analyzer

OPERATING INSTRUCTIONS

Model 6000A

Photometric Analyzer

DANGER

HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM.

PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.

HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.

ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING. BEFORE CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/ MANAGER.

Teledyne Analytical Instruments

05/08/98

Model 6000A

All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be electronic, mechanical, magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-

1580.

Warranty

This equipment is sold subject to the mutual agreement that it is warranted by us free from defects of material and of construction, and that our liability shall be limited to replacing or repairing at our factory (without charge, except for transportation), or at customer plant at our option, any material or construction in which defects become apparent within one year from the date of shipment, except in cases where quotations or acknowledgements provide for a shorter period. Components manufactured by others bear the warranty of their manufacturer. This warranty does not cover defects caused by wear, accident, misuse, neglect or repairs other than those performed by Teledyne or an authorized service center. We assume no liability for direct or indirect damages of any kind and the purchaser by the acceptance of the equipment will assume all liability for any damage which may result from its use or misuse.

We reserve the right to employ any suitable material in the manufacture of our apparatus, and to make any alterations in the dimensions, shape or weight of any parts, in so far as such alterations do not adversely affect our warranty.

Important Notice

This instrument provides measurement readings to its user, and serves as a tool by which valuable data can be gathered. The information provided by the instrument may assist the user in eliminating potential hazards caused by his process; however, it is essential that all personnel involved in the use of the instrument or its interface, with the process being measured, be properly trained in the process itself, as well as all instrumentation related to it.

The safety of personnel is ultimately the responsibility of those who control process conditions. While this instrument may be able to provide early warning of imminent danger, it has no control over process conditions, and it can be misused. In particular, any alarm or control systems installed must be tested and understood, both as to how they operate and as to how they can be defeated. Any safeguards required such as locks, labels, or redundancy, must be provided by the user or specifically requested of Teledyne at the time the order is placed.

Therefore, the purchaser must be aware of the hazardous process conditions. The purchaser is responsible for the training of personnel, for providing hazard warning methods and instrumentation per the appropriate standards, and for ensuring that hazard warning devices and instrumentation are maintained and operated properly.

Teledyne Analytical Instruments, the manufacturer of this instrument, cannot accept responsibility for conditions beyond its knowledge and control. No statement expressed or implied by this document or any information disseminated by the manufacturer or its agents, is to be construed as a warranty of adequate safety control under the

user’s process conditions.

Teledyne Analytical Instruments

Photometric Analyzer

Table of Contents

Specific Model Information ................................. iv

Preface ................................................................ v

Part I: Control Unit.................................Part I: 1-1

Part II: Analysis Unit ............................. Part II: 1-1

Appendix ......................................................... A-1

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iii

Model 6000A

Teledyne Analytical Instruments

Part I: Control Unit

OPERATING INSTRUCTIONS

Model 6000A

Photometric Analyzer

Part I: Control Unit

Panel Mount

Teledyne Analytical Instruments

Part I: i

Model 6000A Photometric Analyzer

Table of Contents

1 Introduction

1.1 Overview ........................................................................ 1-1

1.2 Typical Applications ....................................................... 1-1

1.3 Main Features of the Analyzer ....................................... 1-1

1.4 Control Unit Inner Interface Panel .................................. 1-2

1.5 Control Unit Interface Panel ........................................... 1-4

2 Installation

2.1 Unpacking the Control Unit ............................................ 2-1

2.2 Mounting the Control Unit .............................................. 2-1

2.3 Electrical Connections ................................................... 2-3

2.4 Testing the System ......................................................... 2-10

3 Operation

3.1 Introduction .................................................................... 3-1

3.2 Using the Data Entry and Function Buttons ................... 3-1

3.3 The

3.3.1 Setting up an Auto-Cal........................................... 3-4

3.3.2 Password Protection .............................................. 3-6

3.3.3 Logging Out ........................................................... 3-8

3.3.4 System Self-Diagnostic Test .................................. 3-8

3.3.5 The Model Screen ................................................. 3-9

3.3.6 Checking Linearity with Algorithm ......................... 3-9

3.3.7 Digital Flter Setup .................................................. 3-10

3.3.8 Filter or Solenoid Setup ......................................... 3-12

3.3.9 Hold/Track Setup ................................................... 3-12

3.3.10 Calibration/Hold Timer Setup ................................ 3-13

3.3.11 Analog 4 to 20 mA Output Calibration.................... 3-14

3.3.12 Model ..................................................................... 3-15

System

4.3.2.1 Entering the Password ................................... 3-6

4.3.2.2 Installing or Changing the Password ............. 3-7

Function ..................................................... 3-4

ii: Part I

Teledyne Analytical Instruments

Part I: Control Unit

3.4 The

3.4.1 Zero Cal ................................................................. 3-16

3.4.2 Span Cal ................................................................ 3-18

3.5 The

3.6 The

3.6.1 Manual (Select/Define Range) Screen .................. 3-23

3.6.2 Auto Screen ........................................................... 3-23

3.6.3 Precautions............................................................ 3-24

3.7 The

3.8 Programming ................................................................. 3-26

3.8.1 The Set Range Screen .......................................... 3.26

3.8.2 The Curve Algorithm Screen ................................. 3-28

4 Maintenance

Zero

and

Span

Functions ....................................... 3-15

3.4.1.1 Auto Mode Zeroing ........................................ 3-16

3.4.1.2 Manual Mode Zeroing.................................... 3-17

3.4.1.3 Cell Failure .................................................... 3-18

3.4.2.1 Auto Mode Spanning ..................................... 3-18

3.4.2.2 Manual Mode Spanning................................. 3-19

Alarms Range

Analyze

3.8.2.1 Manual Mode Linearization ........................... 3-29

3.8.2.2 Auto Mode Linearization ................................ 3-29

Function...................................................... 3-20

Select Function ........................................... 3-22

Function .................................................... 3-25

4.1 Fuse Replacement......................................................... 4-1

4.2 System Self Diagnostic Test........................................... 4-2

4.3 Major Internal Components ............................................ 4-3

4.4 Cleaning ........................................................................ 4-4

A Appendix

Model 6000A Specifications .................................................. A-3

Teledyne Analytical Instruments

Part I: iii

Model 6000A Photometric Analyzer

iv: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

Introduction

1.1 Overview

The Teledyne Analytical Instruments Model 6000A Control Unit, together with a 6000A Analysis Unit, is versatile microprocessor-based instrument.

Part I, of this manual covers the Model 6000A General Purpose Panel Mount Control Unit. (The Analysis Unit is covered in Part II of this manual.) The Control Unit is for indoor use in a nonhazardous environment only. The Analysis Unit (or Remote Section) can be designed for a variety of hazardous environments.

1.2 Typical Applications

A few typical applications of the Model 6000A are:

• Oil in refinery waste water condensates Streams

•CL2, HC, SO2, H2S in stack gases or Liquid Streams

• Chemical reaction monitoring

• Product Color monitoring liquids

• Petrochemical process control

• Quality assurance

• Phenol in water

• Hazardous waste incineration

• CLO2, Hypochlorite monitoring

•F2 monitoring

1.3 Main Features of the Analyzer

The Model 6000A Photometric Analyzer is sophisticated yet simple to use. The main features of the analyzer include:

Teledyne Analytical Instruments

Part I: 1-1

1 Introduction Model 6000A

• A 2-line alphanumeric display screen, driven by microprocessor electronics, that continuously prompts and informs the operator.

• High resolution, accurate readings of concentration from low ppm levels through to 100%. Large, bright, meter readout.

• Versatile analysis over a wide range of applications.

• Microprocessor based electronics: 8-bit CMOS microprocessor with 32 kB RAM and 128 kB ROM.

• Three user definable output ranges (from 0-1 ppm through 0-100 %) allow best match to users process and equipment.

• Calibration range for convenient zeroing or spanning.

• Auto Ranging allows analyzer to automatically select the proper preset range for a given measurement. Manual override allows the user to lock onto a specific range of interest.

• Two adjustable concentration alarms and a system failure alarm.

• Extensive self-diagnostic testing, at startup and on demand, with continuous power-supply monitoring.

• RS-232 serial digital port for use with a computer or other digital communication device.

• Analog outputs for concentration and range identification. (0-1 V dc standard, and isolated 4–20 mA dc)

• Superior accuracy.

• Internal calibration (optional).

1.4 Control Unit Inner Control Panel

The standard 6000A Control Unit is housed in a rugged panelmetal case with all remote controls and displays accessible from the front control panel. See Figure 1-1. The front control panel has a digital meter, an alphanumeric Vacuum Fluroscent Display (VFD), and buttons for operating the analyzer.

1-2: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

Figure 1-1: Front of Panel Control Unit

Function Keys: ---- touch-sensitive membrane switches are used to change

the specific function performed by the analyzer:

• Analyze Perform analysis for concentration content of a sample.

• System Perform system-related tasks (described in detail in chapter

3, Operation.).

• Span Span calibrate the analyzer.

• Zero Zero calibrate the analyzer.

• Alarms Set the alarm setpoints and attributes.

• Range Set up the 3 user definable ranges for the instrument.

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Part I: 1-3

1 Introduction Model 6000A

Data Entry Keys: Six touch-sensitive membrane switches are used to input data to the instrument via the alphanumeric VFD display:

• Left & Right Arrows Select between functions currently

displayed on the VFD screen.

• Up & Down Arrows Increment or decrement values of

functions currently displayed.

• Enter Moves VFD display on to the next screen in a series. If

none remains, returns to the

• Escape Moves VFD display back to the previous screen in a

series. If none remains, returns to the

Digital Meter Display: The meter display is a Light Emitting Diode LED device that produces large, bright, 7-segment numbers that are legible in any lighting. It is accurate across all analysis ranges. The 6000A models produce continuous readout from 0-10,000 ppm and then switch to continuous percent readout from 1-100 %.

Analyze

screen.

Analyze

screen.

Alphanumeric Interface Screen: The backlit VFD screen is an easyto-use interface between operator and analyzer. It displays values, options, and messages for immediate feedback to the operator.

Power Button: The button switches the instrument power

between I (ON) and O (a Keep-Alive state). In the O state, the instrument’s circuitry is operating, but there are no displays or outputs.

CAUTION: The power must be disconnected to fully

disconnect power from the instrument. When chassis is exposed or when access door is open and power cable is connected, use extra care to avoid contact with live electrical circuits .

Access Door: For access to the electronics and interface panel, the front panel swings open when the latch in the panel is pressed all the way in with a narrow gauge tool. Accessing the main circuit board and other electronics requires unfastening the rear panel screws and sliding the unit out of the case.

1.5 Control Unit Interface Panel

The Control Unit interface panel, shown in Figure 1-2, contains the electrical terminal blocks for external inputs and outputs. The input/output functions are described briefly here and in detail in the Installation chapter of this manual.

1-4: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

Figure 1-2: Model 6000A Rear Panel

Teledyne Analytical Instruments

Part I: 1-5

1 Introduction Model 6000A

• Power Connection AC power source, 115VAC, 50/60 Hz

• Analog Outputs 0-1 V dc concentration and 0-1 V dc

range ID. Isolated 4-20 mA dc and 4-20 mA dc range ID.

• Alarm Connections 2 concentration alarms and 1 system

alarm.

• RS-232 Port Serial digital concentration signal output

and control input.

• Remote Bench Provides all electrical interconnect to the

Analysis Unit.

Remote Span/Zero Digital inputs allow external control of

analyzer calibration.

• Calibration Contact To notify external equipment that

instrument is being calibrated and readings are not monitoring sample.

• Range ID Contacts Four separate, dedicated, range relay

contacts. Low, Medium, High, Cal.

• Network I/O Serial digital communications for local

network access. For future expansion. Not implemented at this printing.

Note: If you require highly accurate Auto-Cal timing, use external

Auto-Cal control where possible. The internal clock in the Model 6000A is accurate to 2-3 %. Accordingly, internally scheduled calibrations can vary 2-3 % per day.

1-6: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

Installation

Installation of Model 6000A Analyzers includes:

1. Unpacking, mounting, and interconnecting the Control Unit and the Analysis Unit

2. Making gas connections to the system

3. Making electrical connections to the system

4. Testing the system.

This chapter covers installation of the Control Unit. (Installation of the

Analysis Unit is covered in Part II of this manual.)

2.1 Unpacking the Control Unit

The analyzer is shipped with all the materials you need to install and prepare the system for operation. Carefully unpack the Control Unit and inspect it for damage. Immediately report any damage to the shipping agent.

2.2 Mounting the Control Unit

The Model 6000A Control Unit is for indoor use in a general purpose area. This Unit is NOT for any type of hazardous environments.

Figure 2-1 is an illustration of a Model 6000A standard Control Unit front panel and mounting brackets as shown two mounting tabs are at the top and two at the bottom of the units frame.

Teledyne Analytical Instruments

Part I: 2-1

2 Installation Model 6000A

Figure 2-1: Front Panel of the Model 6000A Control Unit

All operator controls are mounted on the inner control panel "door", which is hinged on the left edge and doubles as a door to provide access to the internal components of the instrument. The door will swing open when the button of the latch is pressed all the way in with a narrow gauge tool (less than 0.18 inch wide), such as a small hex wrench or screwdriver

2-2: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

7.1 2

5 in

Figure 2-2: Required Front Door Clearance

Allow clearance for the door to open in a 90-degree arc of radius 11.75

inches. See Figure 2-2.

2.3 Electrical Connections

Figure 2-3 shows the Control Unit interface panel. Connections for power, communications, and both digital and analog signal outputs are described in the following paragraphs. Wire size and maximum length data appear in the Drawings at the back of this manual.

Figure 2-3: Interface Panel of the Model 6000A Control Unit

For safe connections, ensure that no uninsulated wire extends outside of the terminal blocks. Stripped wire ends must insert completely

into terminal blocks. No uninsulated wiring should come in contact with fingers, tools or clothing during normal operation.

Teledyne Analytical Instruments

Part I: 2-3

2 Installation Model 6000A

Primary Input Power: The power supply requires a 115Vac, 50/60Hz

power source. The power cord receptacle and fuse block are located in the same assembly. Insert the female plug end of the power cord into the power cord receptacle.

CAUTION: Power is applied to the instrument's circuitry as

long as the instrument is connected to the power source. The gray switch on the front panel is for switching power on or off to the displays and out-

puts only.

Fuse Installation: The fuse block, at the right of the power cord

receptacle, accepts US or European size fuses. A jumper replaces the fuse in whichever fuse receptacle is not used. Fuses are not installed at the factory. Be sure to install the proper fuse as part of installation. (See Fuse Replace- ment in chapter 5, maintenance.)

Analog Outputs: There are four terminal blocks, one for each

analog output. There are two connectors per output with the polarity noted. See Figure 2-5.

The outputs are:

0–1 V dc % of Range: Voltage rises linearly with increasing sample con-

centration, from 0 V at 0% to 1 V at 100%. (Full scale = 100% programmed range.)

0–1 V dc Range ID: 0.25 V = Low Range, 0.5 V = Medium Range,

0.75 V = High Range, 1 V = Cal Range.

4–20 mA dc % Range: (-M Option) Current increases linearly with increas-

ing sample concentration, from 4 mA at 0% to 20 mA at full scale 100%. (Full scale = 100% of programmed range.)

4–20 mA dc Range ID: (-M Option) 8 mA = Low Range, 12 mA = Me-

dium Range, 16 mA = High Range, 20 mA = Cal Range.

Figure 2-5: Analog Output Connections

2-4: Part I

Examples:

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

The analog output signal has a voltage which depends on the sample concentration AND the currently activated analysis range. To relate the signal output to the actual concentration, it is necessary to know what range the instrument is currently on, especially when the analyzer is in the autoranging mode.

The signaloutput for concentration is linear over currently selected analysis range. For example, if the analyzer is set on a range that was defined as 0-10 %, then the output would be as shown in Table 2-1.

Table 2-1: Analog Concentration Output-Examples

Analyte Voltage Signal Current Signal

% Output (V dc) Output (mA dc)

0 0.0 4.0 1 0.1 5.6 2 0.2 7.2 3 0.3 8.8 4 0.4 10.4 5 0.5 12.0 6 0.6 13.6 7 0.7 15.2 8 0.8 16.8 9 0.9 18.4

10 1.0 20.0

To provide an indication of the range, a second pair of analog output terminals are used. They generate a steady preset voltage (or current when using the current outputs) to represent a particular range. Table 2-2 gives the range ID output for each analysis range.

Teledyne Analytical Instruments

Part I: 2-5

2 Installation Model 6000A

Table 2-2: Analog Range ID Output - Example

Range Voltage (V) Current (mA)

LO 0.25 8 MED 0.50 12 HI 0.75 16 CAL (0-25%) 1.00 20

Alarm Relays:

There are three alarm-circuit connectors on the alarm relays block (under RELAY OUTPUTS) for making connections to internal alarm relay contacts. Each provides a set of Form C contacts for each type of alarm. Each has both normally open and normally closed contact connections. The contact connections are indicated by diagrams on the rear panel. They are capable of switching up to 3 ampers at 250 V AC into a resistive load (Figure 2-6).

Figure 2-6: Types of Relay Contacts

The connectors are:

Threshold Alarm 1: • Can be configured as high (actuates when

concentration is above threshold), or low (actuates when concentration is below thresh old).

• Can be configured as fail-safe or non-fail-safe.

2-6: Part I

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

• Can be configured as latching or nonlatching.

• Can be configured out (defeated).

Threshold Alarm 2: • Can be configured as high (actuates when concen-

tration is above threshold), or low (actuates when concentration is below threshold).

• Can be configured as fail-safe or non-fail-safe.

• Can be configured as latching or nonlatching.

• Can be configured out (defeated).

System Alarm: Actuates when DC power supplied to circuits is

unacceptable in one or more parameters. Permanently configured as fail-safe and latching. Cannot be defeated. Actuates if self test fails.

To reset a System Alarm during installation, disconnect power to the instrument and then reconnect it

Further detail can be found in chapter 3, section 4-5.

Digital Remote Cal Inputs Remote Zero and Span Inputs: The REMOTE SPAN and RE-

MOTE ZERO inputs are on the DIGITAL INPUT terminal block. They accept 0 V (OFF) or 24 V dc (ON) for remote control of calibration (See Remote Calibration Protocol below.)

Zero: Floating input. 5 to 24 V input across the + and – terminals

puts the analyzer into the ZERO mode. Either side may be grounded at the source of the signal. 0 to 1 volt across the terminals allows ZERO mode to terminate when done. A synchronous signal must open and close the external zero valve appropriately. See Remote Probe Connector at end of section 3.3. (With the -C option, the internal valves automatically operate synchronously).

Span: Floating input. 5 to 24 V input across the + and – terminals

puts the analyzer into the grounded at the source of the signal. 0 to 1 volt across the terminals allows SPAN mode to terminate when done. A synchronous signal must open and close the external span valve appropriately. See Remote Probe Connector at end of section 3.3. (With the -C option, the internal valves automatically operate synchronously.)

SPAN

mode. Either side may be

Cal Contact: This relay contact is closed while analyzer is spanning

and/or zeroing. (See Remote Calibration Protocol below.)

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Part I: 2-7

2 Installation Model 6000A

Remote Calibration Protocol: To properly time the Digital Remote

Cal Inputs to the Model 6000A Analyzer, the customer's controller must monitor the Cal Relay Contact.

When the contact is OPEN, the analyzer is analyzing, the Remote Cal

Inputs are being polled, and a zero or span command can be sent.

When the contact is CLOSED, the analyzer is already calibrating. It

will ignore your request to calibrate, and it will not remember that request.

Once a zero or span command is sent, and acknowledged (contact closes), release it. If the command is continued until after the zero or span is complete, the calibration will repeat and the Cal Relay Contact (CRC) will close again.

For example:

1) Test the CRC. When the CRC is open, Send a zero command until the CRC closes (The CRC will quickly close.)

2) When the CRC closes, remove the zero command.

3) When CRC opens again, send a span command until the CRC closes. (The CRC will quickly close.)

4) When the CRC closes, remove the span command.

When CRC opens again, zero and span are done, and the sample is

being analyzed.

Note: The Remote Bench connector (paragraph 3.3) provides signals

to ensure that the zero and span gas valves will be controlled synchronously.

Range ID Relays: Four dedicated RANGE ID CONTACT relays .

The first three ranges are assigned to relays in ascending order—Low range is assigned to RANGE 1 ID, Medium range is assigned to RANGE 2 ID, and High range is assigned to RANGE 3 ID.

Network I/O: A serial digital input/output for local network protocol.

At this printing, this port is not yet functional. It is to be used in future versions of the instrument.

RS-232 Port: The digital signal output is a standard RS-232 serial

communications port used to connect the analyzer to a computer, terminal, or other digital device. The pinouts are listed in Table 2-3.

2-8: Part I

Table 2-3: RS-232 Signals

RS-232 Sig RS-232 Pin Purpose

DCD 1 Data Carrier Detect

Teledyne Analytical Instruments

Photometric Analyzer Part I: Control Unit

RD 2 Received Data TD 3 Transmitted Data DTR 4 Data Terminal Ready COM 5 Common DSR 6 Data Set Ready RTS 7 Request to Send CTS 8 Clear to Send RI 9 Ring Indicator

The data sent is status information, in digital form, updated every two

seconds. Status is reported in the following order:

• The concentration in percent

• The range is use (HI< MED< LO)

• The span of the range 0-100%, etc)

• Which alarm - if any - are disabled (AL-x DISABLED)

• Which alarms - if any - are tripped (AL-x ON)

Each status output is followed by a carriage return and line feed.

Three input functions using RS-232 have been implemented to date.

They are described in Table 2-4.

Table 2-4: Commands via RS-232 Input

Command Description as<enter> Immediately starts an autospan. az<enter> Immediately starts an autozero. st<enter> Toggling input. Stops/Starts any status message output

from the RS-232, Until st<enter> is sent again.

The RS-232 protocol allows some flexibility in its implementation.

Table 2-5 lists certain RS-232 values that are required by the 6000A.

Teledyne Analytical Instruments

Part I: 2-9

2 Installation Model 6000A

Table 2-5: Required RS-232 Options

Parameter Setting

Baud 2400

Byte 8 bits

Parity none

Stop Bits 1

Message Interval 2 seconds

Remote Bench and Solenoid Valves: The 6000A is a single-chassis

instrument. However, the REMOTE BENCH and SOLENOID RETURN connector is provided on the uper right corner of the backpanel as a 12 pin connector. The Remote Bench is wired at the factory as well as any optional solenoid valves included in the system.

2.4 Testing the System

After The Control Unit and the Analysis Unit are both installed and

interconnected, and the system gas and electrical connections are complete, the system is ready to test. Before plugging either of the units into their respective power sources:

• Check the integrity and accuracy of the gas connections. Make sure there are no leaks.

• Check the integrity and accuracy of all electrical connections. Make sure there are no exposed conductors

• Check that sample pressure typically between 0 and 30 psig, according to the requirements of your process.

Power up the system, and test it by performing the following operation:

1. Repeat the Self-Diagnostic Test as.

2-10: Part I

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

Operation

3.1 Introduction

Although the Model 6000A is usually programmed to your application at

the factory, it can be further configured at the operator level, or even, cautious- ly, reprogrammed. Depending on the specifics of the application, this might include all or a subset of the following procedures:

• Setting system parameters:

• Establish a security password, if desired, requiring Operator to log in (secure in safe file for referrence).

• Establish and start an automatic calibration cycle, if desired.

• Routine Operation:

• Calibrate the instrument.

• Choose autoranging or select a fixed range of analysis.

• Set alarm setpoints, and modes of alarm operation (latching, fail-safe, etc).

• Program/Reprogram the analyzer:

• Define new applications.

• Linearize your ranges.

If you choose not to use password protection, the default password is automatically displayed on the password screen when you start up, and you simply press

Enter

for access to all functions of the analyzer.

3.2 Using the Data Entry and Function Buttons

Data Entry Buttons: The < > buttons select options from the menu currently being displayed on the VFD screen. The selected option blinks.

When the selected option includes a modifiable item, the can be used to increment or decrement that modifiable item.

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∆∆

∆∇ arrow buttons

∆∆

Part I 3-1

3 Operation Model 6000A

The

Enter

Escape

The not yet accepted by use of the

Figure 4-1 shows the hierarchy of functions available to the operator via the

function buttons. The six function buttons on the analyzer are:

•

• Four of these are for ordinary setup and operation:

button is used to accept any new entries on the VFD screen.

button is used to abort any new entries on the VFD screen that are

Enter

Analyze.

monitors the thermal conductivity of the sample, displays the percent or parts-per-million of target gas or contamination, and warns of any alarm conditions.

System.

• Setup an Auto-Cal

• Assign Passwords

• Log out to secure system

This is the normal operating mode. The analyzer

The system function consists of nine subfunctions.

button.

• Initiate a Self-Test

Three of the subfunctions do auxiliary tasks:

• Checking model and software version

• Adjust electronic filter of the signal

• Display more subfunctions

Two of these are for programming/reprogramming the analyzer:

• Define gas applications and ranges (Refer to programming section, or contact factory.)

• Use the Curve Algorithm to linearize output. (Refer to programming section, or contact factory.)

•

Zero

. Used to set up a zero calibration.

•

Span.

•

Alarms.

each alarm will be active or defeated, HI or LO acting, latching, and/or fail-safe.

•

Range.

switched automatically with autoranging or used as individual fixed ranges.

Used to set up a span calibration.

Used to set the alarm setpoints and determine whether

Used to set up three analysis ranges that can be

Any function can be selected at any time by pressing the appropriate button (unless password restrictions apply). The order as presented in this manual is appropriate for an initial setup.

Each of these functions is described in greater detail in the following procedures. The VFD screen text that accompanies each operation is reproduced, at

3-2 Part I

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

System

Dig_filt

SELF-TEST

PWD

LOGOUT

AUTOCAL

FILSOL

TRACK or

HOLD

CAL-HOLD

TIMER

Set Digital

Filter

Self-Test in

Progress

Enter

Password

Secure System

setup not allowed

Span/Zero status

and <>setup

Span/Zero

Solenoid or Filter

Set track or hold output

Set cal. hold and

sample hold timer

Self-Test

Results

Change Yes/No

Span/Zero timing

and on/off

Enter

Change

Password

Enter

Verify

Password

Enter

ALGORITHM

APPLICATION

MODEL

OUTPUT:

4 or 20 MA

Select range

Display

Model/Version

Set current

output

Display gas use

and range

Define

Application/Range

Enter

Select

Verify/Setup

Enter

Verify data

Points

Auto/Manual

linear Cal.

Enter

Input/Output

Enter Span

gas value

Figure 3-1: Hierarchy of System Functions and Subfunctions

Enter

Teledyne Analytical Instruments

Part I 3-3

3 Operation Model 6000A

the appropriate point in the procedure, in a Monospaced type style. Push-button names are printed in

Oblique

type.

3.3 The

The subfuctions of the procedures for their use follow the descriptions:

• Dig_Filt: Adjust how much digital filtering should be on the

signal

• SELF-TEST: Performs a self-diagnostic test to check the integrity

of the power supplies, outputs, detector signal and preamplifier.

• PWD: Login security system for accessing to the setup functions.

• LOGOUT: Prevents an unauthorized tampering with analyzer

settings.

• AUTOCAL: Set the automatic calibrated timer schedule for Zero

and Span cycling.

• FILSOL: Select Span/Zero flag (filter) or Span/Zero solenoid

valve for calibration method.

• TRACK: Set the system reading to be held or followed by the

concentration “gas or filter” during calibration.

• CAL-HOLD-TIMER: Set the timing for calibration holding and

timing for the sample reading after return to analyze mode.

System

Function

function are described below. Specific

• ALGORITHM: Linearize the output for nonlinear characteristic.

• APPLICATION: Used to define the analysis ranges and application

(gas used).

• MODEL: Displays model number and software version.

• OUTPUT: 4-20 MA: Adjust 4 and 20 mA output.

3.3.1 Setting up an AUTO-CAL

When proper automatic valving is connected, the Analyzer can cycle itself through a sequence of steps that automatically zero and span the instrument.

Note: Before setting up an AUTO-CAL, be sure you understand the

Zero

and

Span

functions as described in section 4.4, and

follow the precautions given there.

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Photometric Analyzer Operation 3

Note: If you require highly accurate AUTO-CAL timing, use external

AUTO-CAL control where possible. The internal clock in the Model 6000A is accurate to 2-3 %. Accordingly, internally scheduled calibrations can vary 2-3 % per day.

To setup an AutoCal cycle: Choose

System

from the Function buttons. TheVFD will display five

subfunctions.

DIG_FILT SELFTEST PWD LOGOUT MORE

Select MORE and press the Enter Key

AUTOCAL FILSOL HOLD CAL-HOLD-TIMER MORE

Use < > arrows to blink AUTOCAL, and press

Enter

. A new screen

for ZERO/SPAN set appears.

ZERO in Ød Øh off SPAN in Ød Øh off

Press < > arrows to blink ZERO (or SPAN), then press

Enter

again. (You

won’t be able to set OFF to ON if a zero interval is entered.) A Span Every

... (or Zero Every ...) screen appears.

Zero schedule: OFF Day: Ød Hour: Øh

∆∆

Use

∆∇ arrows to set an interval value, then use < > arrows to move to the

∆∆

start-time value. Use

∆∆

∆∇ arrows to set a start-time value.

∆∆

To turn ON the SPAN and/or ZERO cycles (to activate AUTOCAL): Press

System

again, choose AUTOCAL, and press

Enter

again. When the ZERO/

SPAN values screen appears, use the < > arrows to blink the ZERO (or SPAN)

and press

∆∆

∆∇ arrows to set the OFF/ON field to ON. You can now turn these fields ON

∆∆

Enter

to go to the next screen. Use < > to select OFF/ON field. Use

because there is a nonzero span interval defined.

If instrument is turned off, the next time the instrument is powered, the instrument will automatically perform a calibration cycle after 3 minutes of entering the sample mode if AUTOCAL functions were on prior to shut down.

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Part I 3-5

3 Operation Model 6000A

3.3.2 Password Protection

Before a unique password is assigned, the system assigns TAI by default.

This password will be displayed automatically. The operator just presses the Enter key to be allowed total access to the instrument’s features.

If a password is assigned, then setting the following system parameters can

be done only after the password is entered: alarm setpoints, assigning a new password, range/application selections, and curve algorithm linearization. (APPLICATION and ALGORITHM are covered in the programming section.) However, the instrument can still be used for analysis or for initiating a self-test without entering the password. To defeat security the password must be changed back to TAI.

NOTE: If you use password security, it is advisable to keep a copy of

the password in a separate, safe location.

3.3.2.1 Entering the Password

To install a new password or change a previously installed password, you must key in and effect, pressing the

Press

ENTER

System

the old password first. If the default password is in

ENTER

to enter the

button will enter the default TAI password for you.

System

DIG_FILT AUTOCAL PWD LOGOUT MORE

mode.

Use the < > arrow keys to scroll the blinking over to PWD, and press

Enter

to select the password function. Either the default TAI password or AAA

place holders for an existing password will appear on screen depending on whether or not a password has been previously installed.

Enter password: T A I

Enter password: A A A

The screen prompts you to enter the current password. If you are not using password protection, press Enter to accept TAI as the default password. If a password has been previously installed, enter the password using the < > arrow keys to scroll back and forth between letters, and the

∆∆

∆∇ arrow keys to change

∆∆

the letters to the proper password. Press Enter to enter the password.

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Photometric Analyzer Operation 3

In a few seconds, you will be given the opportunity to change this pass-

word or keep it and go on.

Change Password? <ENT>=Yes <ESC>=No

Press

Escape

to move on, or proceed as in Changing the Password,

below.

3.3.2.2 Installing or Changing the Password

If you want to install a password, or change an existing password, proceed as above in Entering the Password. When you are given the opportunity to change the password:

Change Password? <ENT>=Yes <ESC>=No

Press

Enter

to change the password (either the default TAI or the previous-

ly assigned password), or press

Escape

to keep the existing password and

move on.

If you chose

Enter

to change the password, the password assignment

screen appears.

Select new password T A I

Enter the password using the < > arrow keys to move back and forth between the existing password letters, and the

∆∆

∆∇ arrow keys to change the

∆∆

letters to the new password. The full set of 94 characters available for password use are shown in the table below.

Characters Available for Password Definition:

ABCDEFGHIJ KLMNOPQRST UVWXYZ[¥]^ _`abcdefgh ijklmnopqr stuvwxyz{| } → !"#$%&'( )*+'-./012 3456789:;< =>?@

When you have finished typing the new password, press

Enter

. A verification screen appears. The screen will prompt you to retype your password for verification.

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Part I 3-7

3 Operation Model 6000A

Enter PWD To Verify: A A A

Use the arrow keys to retype your password and press Enter when finished. Your password will be stored in the microprocessor and the system will immediately switch to the Analyze screen, and you now have access to all instrument functions.

If all alarms are defeated, the

Analyze

1.95 ppm SO nR1: Ø  1Ø Anlz

screen appears as:

If an alarm is tripped, the second line will change to show which alarm it is:

1.95 ppm SO AL1

NOTE:If you log off the system using the LOGOUT function in the

system menu, you will now be required to re-enter the password to gain access to Alarm, and Range functions.

3.3.3 Logging Out

The LOGOUT function provides a convenient means of leaving the analyzer in a password protected mode without having to shut the instrument off. By entering LOGOUT, you effectively log off the instrument leaving the system protected against use until the password is reentered. To log out, press the

System

button to enter the

System

DIG_FILT SELF-TEST PWD LOGOUT MORE

function.

Use the < > arrow keys to position the blinking over the LOGOUT function, and press

Enter

to Log out. The screen will display the message:

Protected until password entered

3.3.4 System Self-Diagnostic Test

The Model 6000A has a built-in self-diagnostic testing routine. Preprogrammed signals are sent through the power supply, output board, preamp board and sensor circuit. The return signal is analyzed, and at the end of the test the status of each function is displayed on the screen, either as OK or as a number between 1 and 1024. (See System Self Diagnostic Test in chapter 5 for number code.) If any of the functions fails, the System Alarm is tripped.

3-8 Part I

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Photometric Analyzer Operation 3

Note: The sensor will always show failed unless Zero gas is present

in the sampling cell at the time of the SELF-TEST.

The self diagnostics are run automatically by the analyzer whenever the instrument is turned on, but the test can also be run by the operator at will. To initiate a self diagnostic test during operation:

Press the

System

button to start the

DIG_FILT SELF-TEST PWD LOGOUT MORE

System

function.

Use the < > arrow keys again to move the blinking to the SELFTEST and press Enter. The screen will follow the running of the diagnostic.

RUNNING DIAGNOSTIC Testing Preamp  Cell

When the testing is complete, the results are displayed.

Power: OK Analog: OK Cell: 2 Preamp: 3

The module is functioning properly if it is followed by OK. A number indicates a problem in a specific area of the instrument. Refer to Chapter 5 Maintenance and Troubleshooting for number-code information. The results screen alternates for a time with:

Press Any Key To Continue...

Then the analyzer returns to the initial System screen.

3.3.5 The Model Screen

Move the < > arrow key to MORE and press ing, press

Enter

. The screen displays the manufacturer, model, and software

Enter

. With MODEL blink-

version information.

3.3.6 Checking Linearity with ALGORITHM

From the

System

Function screen, select ALGORITHM, and press

sel rng to set algo:  > Ø1 Ø 2 Ø 3 <

Use the < > keys to select the range: 01, 02, or 03. Then press

Teledyne Analytical Instruments

Enter

Part I 3-9

3 Operation Model 6000A

Gas Use: SO2 Range: Ø  10%

Press Enter again.

Algorithm setup: VERIFY SET UP

Select and

Enter

VERIFY to check whether the linearization has been

accomplished satisfactorily.

Dpt INPUT OUTPUT Ø Ø.ØØ Ø.ØØ

The leftmost digit (under Dpt) is the number of the data point being moni-

tored. Use the ∆∇ keys to select the successive points.

The INPUT value is the input to the linearizer. It is the simulated output of

the analyzer. You do not need to actually flow gas.

The OUTPUT value is the output of the linearizer. It should be the ACTUAL

concentration of the span gas being simulated.

If the OUTPUT value shown is not correct, the linearization must be correct-

ed. Press

ESCAPE

to return to the previous screen. Select and Enter SET UP to Calibration Mode screen. (set-up will not work without a PC being connected to the analyzer)

Select algorithm mode : AUTO

There are two ways to linearize: AUTO and MANUAL: The auto mode

requires as many calibration gases as there will be correction points along the curve. The user decides on the number of points, based on the precision required.

The manual mode only requires entering the values for each correction point into the microprocessor via the front panel buttons. Again, the number of points required is determined by the user.

3.3.7 Digital Filter Setup

The 6000A has the option of decreasing or increasing the amount filtering on the signal. This feature enhances the basic filtering done by the analog circuits by setting the amount of digital filtering effected by the microprocessing. To access the digital filter setup, you must:

1. Press the System key to start the System function

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Photometric Analyzer Operation 3

DIG_FILT SELF-TEST PWD LOGOUT MORE

2. DIG_FILT will flash, press the ENTER key,

Weight of digital Filter: 9

3. The number on the second row will flash and can be set by using the Up or Down arrow keys.

The settings go from zero, no digital filtering, to 10, maximum digital filtering. The default setting is 8 and that should suffice for most applications. In some applications where speeding the response time with some trade off in noise is of value, the operator could decrease the number of the digital filter. In applications where the signal is noisy, the operator could switch to a higher number; the response time is slowed down though.

90% response time on the different settings to a step input is shown below. This response time does not include the contributions of the bench sampling system and the preamplifier near the detector.

Setting 90% Response time

(seconds)

0 4.5

1 4.5

2 5.0

3 5.0

4 5.5

5 7.0

6 9.0

7 14.0

8 25.0

9 46.0

10 90.0

At a setting of “zero”, the response time is purely set by the electronics to

4.5 seconds. The numbers above can and will change depending on application and they merely serve to illustrate the effect of the digital filter.

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3 Operation Model 6000A

3.3.8 Filter or Solenoid Setup

The 6000A can be spanned or zeroed by calibration gases or by the optical filters. The proper calibration method should be set at the factory. To access the Filter or Solenoid Flags, you must:

1. Press the System key to start the System function:

DIG_FILT SELF-TEST PWD LOGOUT MORE

2. Using the Right or Left arrow keys, select MORE and press Enter. The

second System screen appears:

AUTOCAL FILSOL TRACK CAL-HOLD-TIMER MORE

3. Select FILSOL using the Right or Left arrow keys and press Enter to

start the method of calibration function.

Set fil/sol for cal Span: FIL Zero: SOL

There are two flag options: zero and/or span flags are choosen at time of purchase, one for Zero calibration and the other for Span located in the Detector housing. To move between the Zero and the Span flags, use the Right or Left arrow keys. FIL means that a filter will do this particular calibration. SOL means that the signal to activate a gas solenoid is enabled. To toggle between the SOL and FIL options, use the Up and Down arrow keys.

The connections to drive the filter and the solenoid are found on a strip terminal located on the interface board. The connections are described in section 5-6 of the maintenance section of the manual.

3.3.9 Hold/Track Setup

The 6000A has ability to disable the analog outputs and freeze the display while undergoing a scheduled or remote calibration. The 6000B will track

changes in the concentration if calibration is started through the front panel. To setup this feature, the operator must:

1. Press the System key to start the System function:

2. Using the Right or Left arrow keys, select MORE and press

3-12 Part I

DIG_FILT SELF-TEST PWD LOGOUT MORE

Enter. The Second System screen appears:

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Photometric Analyzer Operation 3

AUTOCAL FILSOL TRACK CAL-HOLDER-TIMER MORE

AUTOCAL FILSOL HOLD CAL-HOLD-TIMER MORE

3. The option on the right of the first row can be set to TRACK or

HOLD by using the UP or Down keys. By selecting the TRACK option, the analog outputs are enabled and with the display will track the concentration changes while the instrument is undergoing scheduled or remote calibration (either zero or span). By selecting the HOLD option, the analog outputs and display are disabled and will not track the concentration changes while the instrument is undergoing scheduled or remote calibration (either zero or span). In the HOLD option, the analog outputs and display will freeze on the last reading before entering calibration.

The analog outputs are both 0 to 1 volt outputs and both 4 to 20 mA

outputs.

3.3.10 Calibration/Hold Timer Setup

This Calibration Timer lets the operator adjust the time thee instrument purges the calibration gas prior to actually start the calibration computations. The Sample timer lets the operator adjust the time the instrument purges sample gas after finishing a calibration before it lets the analog outputs and display track the change in concentration.

This function and the TRACK/HOLD feature will prevent false alarms while performing remote or autoscheduled calibrations. These functions are not applicable if the calibration is initiated through the front panel. To enter the Calibration/Hold Timer function, you must:

1. Press the System key to start the System function:

DIG_FILT SELF-TEST PWD LOGOUT MORE

2. Using the Right or Left arrow keys, select MORE and press

Enter: The Second System screen appears:

AUTOCAL FILSOL TRACK CAL-HOLD-TIMER MORE

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3 Operation Model 6000A

AUTOCAL FILSOL HOLD CAL-HOLD-TIMER MORE

3. Select with the Right or Left keys CAL-HOLD-TIMER, and

press the Enter key to access this function menu:

Calbrt hold: 3 min Sample hold: 1 min

The calibration hold time is set on the first row, while the sample hold time is set on the second row. To select one or the other, use the Right or Left keys. To modify the time of either timer, use the Up or Down keys. The time is in the minutes.

3.3.11 Analog 4 to 20 mA Output Calibration

This function will let the operator calibrate the 4 to 20 mA analog output to match the display reading. A DMM configure as a DC ammeter is needed. The DMM should be connected across the output terminals of the 4 to 20 mA output to monitor the output current. To enter the 4 to 20 mA output adjust function, you must:

1. Press the System key to start the System function:

DIG_FILT SELF-TEST PWD LOGOUT MORE

2. Using the Right or Left arrow keys, select MORE and press

Enter. The second System screen appears:

AUTOCAL FILSOL TRACK CAL-HOLD-TIMER MORE

AUTOCAL FILSOL HOLD CAL-HOLD-TIMER MORE

3. Using the Right or the Left arrow keys, select MORE and

press Enter. The third System screen appears:

ALGORITHM APPLICATION MODEL OUTPUT: 4 MA

ALGORITHM APPLICATION MODEL OUTPUT: 20 MA

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Photometric Analyzer Operation 3

OUTPUT: 4 MA and OUTPUT: 20 MA can be toggled by moving on that field and pressing the Up or Down key. 4 mA output should be calibrated first and 20 mA output afterwards.

4. Select OUTPUT: 4 MA and press the Enter key

Use UP/DOWN arrow to Adjust 4 ma: 250

The number on the second row is the setpoint of the 4 mA output. It is analogous to a potentiometer wiper. The number can be set anywhere from 0 to 500. The default is 250, in the middle. At the default setting, the output should be very close to 4 mA. If not, slowly adjust the number using the Up or the Down keys until DMM reads 4.00 mA. Press the Enter key when done.

5. Now select OUTPUT: 20 MA and press the Enter key. A screen similar to the one above will appear and the DMM should read close to 20 mA. If not, slowly adjust the number using the Up or Down key until DMM reads 20.0 mA. Press the Enter key when done.

The range of adjustment is approximately +/- 10% of scale (+/- 1.6 ma). Since the 4 to 20 mA output is tied to the 0 to 1 volt output, this function can be used to calibrate the 0 to 1 volt output, if the 4 to 20 mA output is not used. By using a digital Volt meter on the 0-1 Volt output.

3.3.12 Model

This selection in the System menu flashes for a few seconds the model number and the software version installed in this instrument.

3.4 The

The Model 6000A can have as many as three analysis ranges plus a special calibration range (Cal Range). Calibrating any one of the ranges will automatically calibrate the other ranges.

Zero

and

Span

Functions

CAUTION: Always allow 4-5 hours warm-up time before calibrat-

ing, if your analyzer has been disconnected from its power source. This does not apply if the analyzer was plugged in but was in STANDBY.

The analyzer is calibrated using zero, and span gases.

Note: Shut off the gas pressure before connecting it to the analyzer,

and be sure to limit pressure to 40 psig or less when turning it back on.

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3 Operation Model 6000A

Readjust the gas pressure into the analyzer until the flowrate through the Sample Cell settles between 50 to 200 cc/min (approximately 0.1 to 0.4 SCFH).

Note: Always keep the calibration gas flow as close to the flowrate of

the sample gas as possible

3.4.1 Zero Cal

The

Zero

button on the front panel is used to enter the zero calibration function. Zero calibration can be performed in either the automatic or manual mode.

Make sure the zero gas is flowing to the instrument. If you get a CELL

CANNOT BE BALANCED message while zeroing skip to section 4.4.1.3.

3.4.1.1 Auto Mode Zeroing

Observe the precautions in sections 4.4 and 4.4.1, above. Press

Zero

enter the zero function mode. The screen allows you to select whether the zero calibration is to be performed automatically or manually. Use the ∆∇ arrow keys to toggle between AUTO and MAN zero settling. Stop when AUTO appears, blinking, on the display.

Select zero mode: AUTO

Press

Enter

to begin zeroing.

####.## % SO2 Slope=#.### CZero

The beginning zero level is shown in the upper left corner of the display. As

the zero reading settles, the screen displays and updates information on Slope= in percent/second (unless the Slope starts within the acceptable zero range and does not need to settle further). The system first does a coarse zero, shown in the lower right corner of the screen as zero, and displays

FZero

, for 3 min.

CZero

, for 3 min, and then does a fine

Then, and whenever Slope is less than 0.01 for at least 3 min, instead of

Slope you will see a countdown: 9 Left, 8 Left, and so fourth. These are software steps in the zeroing process that the system must complete, AFTER settling, before it can go back to

Analyze

. Software zero is indicated by SZero in the

lower right corner.

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Photometric Analyzer Operation 3

####.## % SO2 4 Left=#.### SZero

The zeroing process will automatically conclude when the output is within the acceptable range for a good zero. Then the analyzer automatically returns to the

Analyze

mode.

3.4.1.2 Manual Mode Zeroing

Zero

Press

to enter the

Zero

function. The screen that appears allows you

to select between automatic or manual zero calibration. Use the ∆∇ keys to toggle between AUTO and MAN zero settling. Stop when MANUAL appears, blinking, on the display.

Select zero mode: MANUAL

Press

Enter

to begin the zero calibration. After a few seconds the first of three zeroing screens appears. The number in the upper left hand corner is the first-stage zero offset. The microprocessor samples the output at a predetermined rate.

####.## % SO2 Zero adj:2048 CZero

The analyzer goes through C–Zero, F–Zero, and S–Zero. During C–Zero and F–Zero, use the possible to zero. Then, press

∆∆

∆∇ keys to adjust displayed Zero adj: value as close as

∆∆

Enter

S–Zero starts. During S–Zero, the Microcontroller takes control as in Auto Mode Zeroing, above. It calculates the differences between successive samplings and displays the rate of change as Slope= a value in parts per million per second (ppm/s).

####.## % SO2 Slope=#.### SZero

Generally, you have a good zero when Slope is less than 0.05 ppm/s for about 30 seconds.

Once zero settling completes, the information is stored in the analyzer’s memory, and the instrument automatically returns to the

Analyze

mode.

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3 Operation Model 6000A

3.4.1.3 Cell Failure

Detector failure in the 6000A is usually associated with inability to zero the instrument with a reasonable voltage differential between the reference and measure voltages. If this should ever happen, the 6000A system alarm trips, and the LCD displays a failure message.

Detector cannot be balanced Check your zero gas

Before optical balancing:

a. Check your zero gas to make sure it is within specifications. b. Check for leaks downstream from the Sample Cell, where con-

tamination may be leaking into the system.

c. Check flowmeter to ensure that the flow is no more than 200

SCCM d. Check temperature controller board. e. Check gas temperature. f. Check the Sample Cell for dirty windows.

If none of the above, proceed to perform an optical balance as described in

section 5.

3.4.2 Span Cal

The

Span

button on the front panel is used to span calibrate the analyzer.

Span calibration can be performed in either the automatic or manual mode.

Make sure the span gas is flowing to the instrument.

3.4.2.1 Auto Mode Spanning

Observe all precautions in sections 3.4 and 3.4.2, above. Press

Span

to enter the span function. The screen that appears allows you to select whether the span calibration is to be performed automatically or manually. Use the

∆∆

∆∇

∆∆

arrow keys to toggle between AUTO and MAN span settling. Stop when AUTO appears, blinking, on the display.

Select span mode: AUTO

Press

Enter

3-18 Part I

to move to the next screen.

Span Val: 2Ø.ØØ % <ENT> To begin span

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

∆∆

∆∇ arrow keys change the value and/or the

∆∆

units, as necessary. When you have set the concentration of the span gas you are using, press

Enter

to begin the Span calibration.

####.##% SO2 Slope=#.### Span

The beginning span value is shown in the upper left corner of the display.

As the span reading settles, the screen displays and updates information on Slope. Spanning automatically ends when the span output corresponds, within tolerance, to the value of the span gas concentration. Then the instrument automatically returns to the analyze mode.

3.4.2.2 Manual Mode Spanning

Press

Span

to start the

Span

function. The screen that appears allows you to select whether the span calibration is to be performed automatically or manually.

Select span mode: MANUAL

Use the ∆∇ keys to toggle between AUTO and MAN span settling. Stop

when MAN appears, blinking, on the display. Press

Enter

to move to the next

screen.

Span Val: 2Ø.ØØ % <ENT> To begin span

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

∆∆

∆∇ arrow keys change the value and/or the

∆∆

units, as necessary. When you have set the concentration of the span gas you are using, press

Press

Enter

to begin the Span calibration.

to enter the span value into the system and begin the span

calibration.

Once the span has begun, the microprocessor samples the output at a predetermined rate. It calculates the difference between successive samplings and displays this difference as Slope on the screen. It takes several seconds for the first Slope value to display. Slope indicates rate of change of the Span reading. It is a sensitive indicator of stability.

####.##% SO2 Slope=#.### Span

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3 Operation Model 6000A

When the Span value displayed on the screen is sufficiently stable, press

Enter

. (Generally, when the Span reading changes by 1 % or less of the range

being calibrated for a period of ten minutes it is sufficiently stable.) Once is pressed, the Span reading changes to the correct value. The instrument then automatically enters the

Analyze

function.

Enter

3.5 The

The Model 6000B is equipped with 6 fully adjustable set points concentration with two alarms and a system failure alarm relay. Each alarm relay has a set of form “C" contacts rated for 3 amperes resistive load at 250 V ac. See Figure in Chapter 2, Installation and/or the Interconnection Diagram included at the back of this manual for relay terminal connections.

The system failure alarm has a fixed configuration described in chapter 2 Installation.

The concentration alarms can be configured from the front panel as either

high or low alarms by the operator. The alarm modes can be set as latching or non-latching, and either failsafe or non-failsafe, or, they can be defeated

altogether. The setpoints for the alarms are also established using this function.

Decide how your alarms should be configured. The choice will depend upon your process. Consider the following four points:

1. Which if any of the alarms are to be high alarms and which if any are to be low alarms?

Setting an alarm as HIGH triggers the alarm when the contaminant concentration rises above the setpoint. Setting an alarm as LOW triggers the alarm when the contaminant concentration falls below the setpoint.

Alarms

Function

Decide whether you want the alarms to be set as:

• Both high (high and high-high) alarms, or

• One high and one low alarm, or

• Both low (low and low-low) alarms.

2. Are either or both of the alarms to be configured as failsafe? In failsafe mode, the alarm relay de-energizes in an alarm

condition. For non-failsafe operation, the relay is energized in an alarm condition. You can set either or both of the concentration alarms to operate in failsafe or non-failsafe mode.

3. Are either of the alarms to be latching? In latching mode, once the alarm or alarms trigger, they will

remain in the alarm mode even if process conditions revert back

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Photometric Analyzer Operation 3

to non-alarm conditions. This mode requires an alarm to be recognized before it can be reset. In the non-latching mode, the alarm status will terminate when process conditions revert to nonalarm conditions.

4. Are either of the alarms to be defeated? The defeat alarm mode is incorporated into the alarm circuit so

that maintenance can be performed under conditions which would normally activate the alarms.

The defeat function can also be used to reset a latched alarm. (See procedures, below.)

If you are using password protection, you will need to enter your password to access the alarm functions. Follow the instructions in section 3.3.3 to enter your password. Once you have clearance to proceed, enter the

Alarm

function.

Press the

Use the move to the next screen.

Five parameters can be changed on this screen:

• To define the setpoint, use the < > arrow keys to move the

• To set the other parameters use the < > arrow keys to move the

Alarm

∆∆

∆∇ keys to choose between % or ppm units. Then press

∆∆

• Value of the alarm setpoint, AL1: ####

• Out-of-range direction, HI or LO

• Defeated? Dft:Y/N (Yes/No)

• Failsafe? Fs:Y/N (Yes/No)

• Latching? Ltch:Y/N (Yes/No).

blinking over to AL1: ####. Then use the ∆∇ arrow keys to change the number. Holding down the key speeds up the incrementing or decrementing.

blinking over to the desired parameter. Then use the ∆∇ arrow keys to change the parameter.

button on the front panel to enter the

AL1: 1ØØØ p p m H I Dft:N Fs:N Ltch:N

Alarm

function.

Enter

• Once the parameters for alarm 1 have been set, press again, and repeat this procedure for alarm 2 (AL2).

• To reset a latched alarm, go to Dft and then press either ∆ two times or ∇ two times. (Toggle it to Y and then back to N.)

Teledyne Analytical Instruments

Alarms

Part I 3-21

3 Operation Model 6000A

–OR –

Go to Ltch and then press either ∆ two times or ∇ two times. (Toggle it to N and back to Y.)

3.6 The

The

Range

of analysis (MANUAL), or to select automatic range switching (AUTO).

In the MANUAL screen, you are further allowed to define the high and low

(concentration) limits of each Range, and select a single, fixed range to run.

Range

function allows you to manually select the concentration range

Select Function

CAUTION: If this is a linearized application, the new range must

be within the limits previously programmed using the System function, if linearization is to apply throughout the range. Furthermore, if the limits are too small a part (approx 10 % or less) of the originally linearized range, the linearization will be compromised.

3.6.1 Manual (Select/Define Range) Screen

The Manual range-switching mode allows you to select a single, fixed analysis range. It then allows you to redefine the upper and lower limits, for the range.

Press

Range

If above screen displays, use the ∆∇ arrow keys to Select MANUAL, and press

Enter.

Use the < > keys to select the range: 01, 02, 03, or CAL. Then press

Enter

Use the < > keys to toggle between the Range: low-end field and the Range: high-end field. Use the

key to start the Range function.

3-22 Part I

Select range mode: MANUAL

Select range to run > Ø1 Ø2 Ø3 CAL<

Gas use: SO2 Range: Ø  1 0 %

∆∆

∆∇ keys to change the values of the fields.

∆∆

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

Press

Escape

range.

Press

Enter

3.6.2 Auto Screen

Autoranging will automatically set to the application that has at least two

ranges setup with the same gases.

In the autoranging mode, the microprocessor automatically responds to concentration changes by switching ranges for optimum readout sensitivity. If the upper limit of the operating range is reached, the instrument automatically shifts to the next higher range. If the concentration falls to below 85% of full scale of the next lower range, the instrument switches to the lower range. A corresponding shift in the DC concentration output, and in the range ID outputs, will be noticed.

to return to the previous screen to select or define another

to return the to the

Analyze

function.

The autoranging feature can be overridden so that analog output stays on a fixed range regardless of the contaminant concentration detected. If the concentration exceeds the upper limit of the range, the DC output will saturate at 1 V dc (20 mA at the current output).

However, the digital readout and the RS-232 output of the concentration are unaffected by the fixed range. They continue to read beyond the full-scale setting until amplifier saturation is reached. Below amplifier saturation, the overrange readings are accurate UNLESS the application uses linearization over the selected range.

The concentration ranges can be redefined using the Manual screen, and the application gases can be redefined using the function, if they are not already defined as necessary.

Range

function

System

CAUTION: Redefining applications or ranges might require

relinearization and/or recalibration.

To setup automatic ranging:

Press

Range

key to start the Range function.

Select range mode : AUTO

Teledyne Analytical Instruments

Part I 3-23

3 Operation Model 6000A

If above screen displays, use the ∆∇ arrow keys to Select AUTO, and

Enter.

press

Press

Escape

3.6.3 Precautions

The Model 6000A allows a great deal of flexibility in choosing ranges for automatic range switching. However, there are some pitfalls that are to be avoided.

Ranges that work well together are:

• Ranges that have the same lower limits but upper limits that differ by approximately an order of magnitude

• Ranges whose upper limits coincide with the lower limits of the next higher range

to return to the previous Analyze Function.

• Ranges where there is a gap between the upper limit of the range and the lower limit of the next higher range.

Range schemes that are to be avoided include:

• Ranges that overlap

• Ranges whose limits are entirely within the span of an adjoining range.

• Ranges where the zero is suppressed, is 1-10, 1-100, etc, however, 80-100, 90-100 is ok where the zero gas is actually 100% concentration and the calibration is inverted.

Figure 3-2 illustrates these schemes graphically.

3-24 Part I

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

0 0.01 0.1 80 90 100

Figure 3-2: Examples of Autoranging Schemes

3.7 The

Normally, all of the functions automatically switch back to the

function when they have completed their assigned operations. Pressing the

Escape

function. Alternatively, you can press the to analyzing your sample.

application gases in the first line, and the range in the second line. In the lower right corner, the abbreviation Anlz indicates that the analyzer is in the mode. If there is an * before the Anlz, it indicates that the range is linearized.

button in many cases also switches the analyzer back to the

The

Analyze

Function

Analyze

function screen shows the impurity concentration and the

button at any time to return

Analyze

1.95 ppm SO2 R1:Ø 10 *Anlz

Teledyne Analytical Instruments

Part I 3-25

3 Operation Model 6000A

If the concentration detected is overrange, the first line of the display blinks

continuously.

3.8 Programming

CAUTION: The programming functions of the Set Range and

Curve Algorithm screens are configured at the factory to the users application specification. These functions should only be reprogrammed by trained, qualified personnel.

To program, you must:

1. Enter the password, if you are using the analyzer’s password protection capability.

2. Connect a computer or computer terminal capable of sending an RS-232 signal to the analyzer RS-232 connector. (See chapter 2 Installation for details). Send the rp command to the analyzer.

3. Press the

Use the < > arrow keys to blink MORE, then press

System

button to start the

DIG_FILT SELF-TEST PWD LOGOUT MORE

System

function.

Enter

AUTOCAL FILSOLL HOLD CAL-HOLD-TIMER MORE

Select MORE and press ENTER one more time

ALGORITHM APPLICATION MODEL OUTPUT: 4MA

Now you will be able to select the APPLICATION and ALGORITHM

set-up functions.

3.8.1 The Set Range Screen

The Set Range screen allows reprogramming of the three analysis ranges and the calibration range (background gas, low end of range, high end of range, and % or ppm units). Original programming is usually done at the factory according to the customer’s application. It must be done through the RS-232 port using a computer running a terminal emulation program.

Note: It is important to distinguish between this

ming subfunction and the

3-26 Part I

Teledyne Analytical Instruments

Range

button function, which is an

System

program-

Photometric Analyzer Operation 3

operator control. The Set Range Screen of the tion allows the user to DEFINE the upper and lower limits of a range AND the application of the range. The function only allows the user to select or define the limits, or to select the application, but not to define the application.

System

Range

func-

button

Normally the Model 6000A is factory set to default to manual range selection, unless it is ordered as a single-application multiple-range unit (in which case it defaults to autoranging). In either case, autoranging or manual range selection can be programmed by the user.

To program the ranges, you must first perform the four steps indicated at the beginning of section 3.8 Programming. You will then be in the second

System

menu screen.

ALGORITHM APPLICATION MODEL OUTPUT: 4MA

Use the < > arrow keys again to move the blinking to APPLICATION and press

Enter

Sel rng to set appl: > Ø1 Ø2 Ø3 CAL <

Use the ∆∇ arrow keys to increment/decrement the range number to 01, 02, 03, or CAL, and press

Enter

Gas Name ********** FR:Ø TO:1Ø %

Teledyne Analytical Instruments

Part I 3-27

3 Operation Model 6000A

Use the < > arrow keys to move to Gas Name, FR: (from—lower end of

range), TO: (to—upper end of range), and PPM or %.

Use the ∆∇ arrow keys to increment the respective parameters as desired.

Enter

Press

to accept the values and return to

Analyze

mode. (See note

below.) Repeat for each range you want to set.

Note: The ranges must be increasing from low to high, for example,

if Range 1 is set to 0–10 % and Range 2 is set to 0–100 %, then Range 3 cannot be set to 0–50 % since that makes Range 3 lower than Range 2.

Ranges, alarms, and spans are always set in either percent or ppm units, as selected by the operator, even though all concentration-data outputs change from ppm to percent when the concentration is above 9999 ppm.

Note: When performing analysis on a fixed range, if the concentra-

tion rises above the upper limit as established by the operator for that particular range, the output saturates at 1 V dc (or 20 mA). However, the digital readout and the RS-232 output continue to read regardless of the analog output range.

To end the session, send:

st<enter> st<enter>

to the analyzer from the computer.

3.8.2 The Curve Algorithm Screen

The Curve Algorithm is a linearization method. It provides from 1 to 9 intermediate points between the ZERO and SPAN values, which can be normalized during calibration, to ensure a straight-line input/output transfer function through the analyzer.

Each range is linearized individually, as necessary, since each range will usually have a totally different linearization requirement.

To linearize the ranges, you must first perform the four steps indicated at the beginning of section 3.8 Programming. You will then be in the second

System

menu screen.

3.8.2.1 Manual Mode Linearization

To linearize manually, you must have previous knowledge of the nonlinear characteristics of your gases. You enter the value of the differential between the actual concentration and the apparent concentration (analyzer output). TAI has

3-28 Part I

Teledyne Analytical Instruments

Photometric Analyzer Operation 3

tabular data of this type for a large number of gases, which it makes available to customers on request. See Appendix for ordering information. To enter data:

From the

System

1. Use < > to select ALGORITHM , and

2. Select and

Enter

MANUAL from the Calibration Mode Select screen.

Functions Screen—

Enter

SETUP.

Dpt INPUT OUTPUT Ø Ø.ØØ Ø.ØØ

Enter

The data entry screen resembles the verify screen, but the gas values can

be modified and the data-point number cannot. Use the

< > keys to toggle

between the INPUT and OUTPUT fields. Use the ∆∇ keys to set the value for the

Enter

lowest concentration into the first point. Then press

After each point is entered, the data-point number increments to the next point. Moving from the lowest to the highest concentration, use the ∆∇ keys to set the proper values at each point.

Dpt INPUT OUTPUT 0 Ø.ØØ Ø.ØØ

Repeat the above procedure for each of the data points you are setting (up to nine points: 0-8). Set the points in unit increments. Do not skip numbers. The linearizer will automatically adjust for the number of points entered.

When you are done, Press calculation, appears briefly, and then the main

ESCAPE

. The message, Completed. Wait for

System

screen returns.

To end the session, send:

st<enter> st<enter>

to the analyzer from the computer.

3.8.2.2 Auto Mode Linearization

To linearize in the Auto Mode, you must have on hand a separate calibration gas for each of the data points you are going use in your linearization. First, the analyzer is zeroed and spanned as usual. Then, each special calibration gas, for each of the intermediate calibration points, is flowed, in turn, through the sensor. As each gas flows, the differential value for that intermediate calibration point is entered from the front panel of the analyzer.

Note: The span gas used to span the analyzer must be >90% of the

range being analyzed.

Teledyne Analytical Instruments

Part I 3-29

3 Operation Model 6000A

Before starting linearization, perform a standard calibration. See section

4.4. To enter data: From the

1. Use < > to select ALGORITHM , and

2. Select and

The Auto Linearize Mode data entry screen appears.

5. Use the ∆∇ keys to set the proper value of calibration gas, and

6. Repeat step 5 for each of the special calibration gases, from the

To end the session, send:

to the analyzer from the computer.

System

Enter

AUTO from the Calibration Mode Select screen.

Enter

. Repeat this step for each cal-point number as it appears in

the Input (x) parentheses.

lowest to the highest concentrations. Press

st<enter> st<enter>

Functions screen—

Enter

SETUP.

19.5 ppm SO2 Input(Ø) :20.00

Enter

Escape

when done.

3-30 Part I

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 4

Maintenance

Aside from normal cleaning and checking for leaks at the gas connections, routine maintenance is limited to replacing Micro-Fuel cells and fuses, and recalibration.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

4.1 Fuse Replacement

1. Place small screwdriver in notch, and pry cover off, as shown in Figure 4-1.

Figure 4-1: Removing Fuse Block from Housing

2. To change between American and European fuses, remove the single retaining screw, flip Fuse Block over 180 degrees, and replace screw.

3. Replace fuse as shown in Figure 4-2.

Part I: 4-1

4 Maintenance Model 6000A

4. Reassemble Housing as shown in Figure 4-1.

American Fuses European Fuses

Figure 4-2: Installing Fuses

4.2 System Self Diagnostic Test

1. Press the

2. Use the < > arrow keys to move to More, and press

3. Use the < > arrow keys to move to Self-Test, and press

The following failure codes apply:

System

Table 4-1: Self Test Failure Codes

Power

0OK 1 5 V Failure 2 15 V Failure 3 Both Failed

Analog

0OK 1 DAC A (0–1 V Concentration) 2 DAC B (0–1 V Range ID) 3 Both Failed

Preamp

button to enter the system mode.

Enter

4-2: Part I

0OK 1 Zero too high 2 Amplifier output doesn't match test input 3 Both Failed

Photometric Analyzer Maintenance 4

4.3 Major Internal Components

The major components in the Control Unit are shown in Figure 4-3.

Figure 4-3: Control Unit Major Internal Components

WARNING: HAZARDOUS VOLTAGES EXIST ON CERTAIN

COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.

The 6000A Control Units contain the following major components:

• Power Supply

• Motherboard (with Microprocessor, RS-232 chip, and Preamplifier PCB)

• Front Panel Display Board and Displays—

5 digit LED meter 2 line, 20 character, alphanumeric, VFD display

See the drawings in the Drawings section in back of this manual

for details.

The Front Panel Display Board is accessed by unlatching and swinging open the front panel, as described earlier. Other electronic components are accessed by removing four rear panel screws and sliding out the entire chassis. See Figure 4-4, below.

Part I: 4-3

4 Maintenance Model 6000A

Figure 4-4: Rear-Panel Screws

To detach the rear panel, remove only those four screws marked with an :.

4.4 Cleaning

If instrument is unmounted at time of cleaning, disconnect the instrument from the power source. Close and latch the front-panel access door. Clean outside surfaces with a soft cloth dampened slightly with plain clean water. Do not use any harsh solvents such as paint thinner or benzene.

For panel-mounted instruments, clean the front panel as prescribed in the above paragraph. DO NOT wipe front panel while the instrument is monitoring your process.

4-4: Part I

Part II: Analysis Unit

OPERATING INSTRUCTIONS

Model 6000A

Photometric Analyzer

Part II: Analysis Unit

NEC Type

Part Number D-65478

6000A - GP, Rack, Panel (Integral or Remote)

6000B - GP, Bulkhead (Z-Purged in Div II areas)

(Integral or Remote)

6020 - (X-Proof, 1,1,B, C, D) (Integral or Remote)

Teledyne Analytical Instruments

Part II: i

Model 6000A Photometric Analyzer

Table of Contents

1 Operational Theory

1.0 Introduction .................................................................... 1-1

1.1 Method of Analysis......................................................... 1-1

1.2 Optical Bench ................................................................ 1-2

1.3 Photometer Amlifier ....................................................... 1-3

1.4 Automatic Zero System .................................................. 1-4

1.5 System Description ........................................................ 1-5

1.6 Photommeter ................................................................. 1-6

1.6.1 Source Module ........................................................ 1-6

1.6.2 Sample Cell ............................................................. 1-7

1.6.3 Detector Module ...................................................... 1-8

1.7 Sample Systems ............................................................ 1-6

2 Installation

2.1 Unpacking the Analyzer ................................................. 1-1

2.2 Installing & Connecting the Analyzer ............................. 1-1

2.2.1 User Connections .................................................. 3-1

2.2.2 Electrical Power Connections ................................ 1-2

2.2.3 Compressed Air Supply ......................................... 2-2

2.2.4 Pipe Connections .................................................. 2-2

2.2.5 Signal and Alarm Output Connections................... 2-2

2.2.6 Sample Delivery System........................................ 2-2

2.2.7 Draining the System .............................................. 2-3

2.3 Testing the System ......................................................... 2-3

2.4 Calibration ..................................................................... 2-3

2.4.1 Calibration Fluids .................................................. 2-3

2.4.2 Calibration ............................................................. 2-3

3 Maintenance

3.0 Routine Maintenance ..................................................... 3-1

3.1 Automatic and Routine Operation .................................. 3-1

3.2 System Visual Check and Response Procedure ........... 3-1

3.3 Routine Maintenance ..................................................... 3-2

3.4 Suggested Preventive Maintenance Schedule .............. 3-2

ii: Part II

Teledyne Analytical Instruments

Part II: Analysis Unit

3.5 Service Procedures and Adjustments ............................ 3-3

3.5.1 Electronics ............................................................. 3-3

3.5.2 Power Supply Test Points....................................... 3-3

3.5.3 Setup of the Signal Processing Front-End Amplifier.. 3-4

3.5.4 Oscilloscope Display of the I to E Converter Output .. 3-4

3.5.5 Balancing the Optics for Equal Light Transmission

with Zero Fluid in the Sample Cell ......................... 3-5

3.5.6 Setup of the Logarithmic Amplifier ......................... 3-6

3.5.7 Inverting Amplifier .................................................. 3-6

3.5.8 Integrated Reference and Measuring Signals ........ 3-7

3.5.9 Battery-Powered Oscilloscope Synchronization Point 3-7

3.6 Interface Board Terminal Strip ........................................ 3-7

Appendix

A-1 Specifications ................................................................ A-1

A-2 Recommended 2-Year Spare Parts List ......................... A-3

A-3 Drawing List ................................................................... A-4

Teledyne Analytical Instruments

Part II: iii

Model 6000A Photometric Analyzer

iv: Part II

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

Operational Theory

1.0 Introduction

The Teledyne Photometric Analyzer uses the ultraviolet (UV) absorption principle to detect and continuously measure a component of interest in a sample stream. The analyzer consists of a single sample cell, chopped beam, dual-wavelength UV process photometer and associated microprocessor based control unit and electronics.

1.1 Method of Analysis

The following description shows the course of optical energy in the analyzer. The optical energy is emitted from a source lamp in the source module, passed through the sample cell, and received by the sensor, which converts the optical energy to pulses of electrical energy. These pulses of electrical energy are processed further in the detector module.

The result is separate pulses that are compared in the control unit to reveal the measurable difference between optical absorption of the sample at a selected wavelength (determined by the measuring optical filter) and a zeroabsorption condition (set by the reference optical filter). The magnitude of that difference represents the concentration of the component of interest in the sample.

Teledyne Analytical Instruments

Part II: 1-1

1 Operational Theory Model 6000A

1.2 Optical Bench

Depending on the application, the analyzer comes with one of the following types of lamps: Deuterium (D), Quartz Iodine (L), or Mercury (Hg). Energy from the lamp, used as a source, is focused through a sample cell onto a photo detector. In front of the detector is a motor-driven filter disc containing two optical filters mounted 180 degrees apart that alternately and continuously rotate into and out of the light beam. Sample flows continuously through the sample cell and absorbs optical energy at various wavelengths depending on its composition.

The analyzer monitors two wavelengths: a measuring wavelength selected where the component of interest has a characteristic absorption peak and a reference wavelength that provides stability by compensating for extraneous phenomena such as turbidity, cell window deposits, unequal optical component aging, etc.

1-2 Part II

Shown without an Integral General Purpose Control Unit

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

6000A Unit Only

D-69023

Teledyne Analytical Instruments

Part II: 1-3

1 Operational Theory Model 6000A

6000B Remote Control Unit

1-4 Part II

6000B Integral Control Unit

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

1.3 Photometer Amplifier

The photo detector converts the photo energy striking it to electrical energy. The magnitude of the photo energy pulses that strike the detector is determined by absorbance by the sample and the properties of the optical filters.

The detector output, which is a sequence of pulses that directly reflect the photo energy transmitted by the measuring and reference filter, is a measure of the concentration of the component of interest in the sample. The difference in energy between the measuring and reference pulse is related exponentially to the concentration of the component of interest.

The photo detector current output is amplified by a current to voltage (I to E) converting amplifier, followed by a second amplifier. The gain of the amplifier can be adjusted to obtain any desired output level.

To obtain analyzer options that are linearly related to the concentration of the component of interest, the output of the I to E converting amplifier is fed to the input of a logarithmic amplifier, which produces a signal that represents the logarithm of the output signal of the second amplifier. The output of the logarithmic amplifier is fed to the input of an inverting amplifier, which acts like a buffer between log amplifier and switch and inverts the input signal for further processing.

The output of the inverting amplifier is fed to a magnetically activated SPDT reed switch, synchronized in such a way that all measuring pulses are collected on one switch contact and all reference pulses on the other.

The pulses pass through diodes that isolate the integrating networks from each other. The integrators convert the reference and measuring pulse energy to a DC level representing them. These reference and measuring DC levels are applied to the subtracting amplifier in the Control Unit. The output of the subtractor is a DC voltage linearly related to the concentration of the component of interest.

From the subtractor, the signal progresses to the analog to digital converter on the motherboard of the Control Unit.

The microcontroller reads the A to D converter and displays the result on the front panel.

Teledyne Analytical Instruments

Part II: 1-5

1 Operational Theory Model 6000A

The procedure to set up the optical bench, the signal processing frontend amplifiers, the standardization of outputs, and alarm systems are described in separate sections of the manual.

1.4 Automatic Zero System

To compensate for zero drift, which may occur during sampling, the analyzer zero reading is updated by the Auto-Cal function of the controller. An electronics timing circuit provides a timing cycle that is user programmable.

The Auto-Zero system is turned off (see chapter 3 section 5). You have the option of setting the analyzer for one six minute zero cycle during hourly intervals of time from one to 23 hours, and daily from one to 30 days.

The Auto Zero system compares the present zero reading of the zero fluid with the zero reading of the zero fluid as it was in the last zero calibration. When there is a difference, the electronic zero circuit sets the zero reading to what it was in the last scheduled zero calibration. This zero reading is set at zero. The Auto Zero circuit is a digital circuit, which employs a DAC (Digital to Analog Converter) that can go out of range.

When the threshold cannot be found (oscillation persists), this means that measuring and reference peak signals as viewed on the oscilloscope at the output of the second amplifier in the detector module are too far out of balance on zero fluid. When this occurs, you must initiate optical balancing of the optical filters for equal light transmission on zero fluid. Measuring and reference peaks must be within one volt with zero fluid in the cell.

Zero drift may occur in the following cases:

1. The output source changes or chemical or solid deposits form on the cell windows, but the application is such that interfering chemicals (sample background changes) are not a problem. The zero fluid in this case may be the major component of the sample, void of the component of interest.

2. The sample may contain chemicals that are not of interest, but absorb UV energy at the measuring wavelength used for analysis of the component of interest. These chemicals produce a signal that adds to the signal of the component of interest and makes it inaccurate. The Auto Zero system discriminates the two signals and drives the interfering signal of the

1-6 Part II

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

background chemicals below zero on an hourly basis. The zero fluid in this case is the sample of which the component of interest is filtered out while the background chemicals are preserved. The Auto Zero system corrects for background changes on an hourly basis, if the analyzer is set to Auto-Zero in an hourly basis.

1.5 System Description

The photometric analyzer is generally constructed for general-purpose (Model 6000A) use and is mounted on a BACKPLATE, an open rack, or in a closed cubicle.

1.6 Photometer

The three photometer modules are mounted on a BACKPLATE. Facing the mounted photometer, the source module is at the right, the sample module is in the center, and the detector module is on the left. Figure 6 shows a diagram of the modules. A source power supply module is placed near the source module. Modules for the general-purpose units (Model 6000) are constructed of sheet metal.

Source Power Supply and optional Temperature Controller PCB

Teledyne Analytical Instruments

Part II: 1-7

1 Operational Theory Model 6000A

1.6.1 Source Module

Any one of three types of source modules may be used in your system. The system model designation identifies the source lamp (see Figure 1 for a list of codes).

The QI (Quartz-Iodine) and D2 (Deuterium Arc) sources are mounted

in the source module which also contains the focusing lens.

The source power supply module provides power to the lamps. The source power supply module houses the power supply, a connector for an optional temperature controller to heat the sample cell, and an optional span filter power supply.

The Quartz-Iodine lamp power supply is a switching regulator that maintains a constant voltage (5 VDC) across the filament of the lamp. The lamp is incandescent. Its envelope is filled with a halogen to avoid sputtering of the filament, blackening the lamp envelope.

The D2 lamp power supply is a combination current and voltage regulator. It maintains a constant anode current in the D2 lamp and controls the voltage across the lamp’s cathode (filament).

When power is turned on, relay K1 is activated and applies 10 VDC across the filaments. After ionization of the Deuterium vapor, the lamp starts to conduct from cathode (filament) to anode. This causes K1 to deactivate and the filament voltage drops to 7 VDC, which is the operating voltage. The voltage from anode to cathode which was 365 V before ionization, drops to about 60 VDC after ignition. This is the operating voltage. A constant current of 350 mADC is the anode current.

The Deuterium arc lamp is employed with samples whose component of interest does not absorb at the high intensity peaks of the HG source emission spectrum. The Deuterium arc produces a broadband of energy (200 to 400 nanometer) in the UV spectrum.

The HG (Mercury arc) source and its power supply reside in one enclosure. A quartz lens focuses the energy into a beam for transmission.

WARNING: UNDER NO CIRCUMSTANCES SHOULD THE

SOURCE MODULE BE OPEN AND THE LAMP ALLOWED TO OPERATE UNLESS PERSONNEL IN THE IMMEDIATE VICINITY ARE WEARING UV FILTERING EYE GOGGLES.

1-8 Part II

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

1.6.2 Sample Cell

The sample cell rests in a module placed between the source and detector module. The module contains the sample cell and optional heater and thermistor for temperature-controlled sample cells.

Exposed Sample Module

1.6.3 Detector Module

The detector module houses the photo detector, chopper assembly, and the signal processing stages of the electronics circuitry. The synchronized chopper motor rotates at 1800 rpm. The detector type found in your analyzer can be identified from the letter in the model number (either B or P).

The filter wheel that carries the optical filters is marked with (M) for measuring and R for reference filter. If you remove the filter wheel, you must align a reference mark on the wheel with a reference mark on the shaft. When the switch activating disc is removed, align with the marks on the switch plate and motor mount when you put it back.

The phototube detector PC board contains the I to E converter stage, second amplifier, logarithmic amplifier, inverter, and first stage of integration. The solid state detector has its I to E converter stage built in on the detector PC board. A system with a solid state detector has a second converter PC board containing the second amplifier, logarithmic amplifier, inverter, and first stage of integration.

The magnetically-activated reed switch is mounted on the motor mount. Oscilloscope test points are available and are mounted on a bracket inside the housing for explosion-proof models; test points are available on the outside in the bottom for general-purpose units. An optional zero and/or span filter is located in this module also.

Teledyne Analytical Instruments

Part II: 1-9

1 Operational Theory Model 6000A

Chopper Motor

Detector

M/R Filter Wheel

Span/Zero Flag

and Solenoid

Photodetector and Preamplifier PCB

1.7 Sample Systems

Below are sample systems that deliver gases to the 6000/6020 sample cell of the Analysis Unit. Depending on the mode of operation either sample or calibration gas is delivered.

1-10 Part II

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

•

Instrument Air in 90-100 PSIG

Sample in

•

V-51

Zero in

•

Span in

•

F-241

V-570

V-469

Sample Flow (.2-2 SCFH)

F384

V-570

F-383

By-Pass Flow (2-20 SCFH)

V-570

V-469

40 PSIG

F691

Model 6000

Analyzer

R-1584

G-306

V-320

Eductor pump

Sample Return

•

Hi pressure reduction, 0-50 psig for faster response

Sample Return 0 PSIG ±.07

Inst Air in 90-120 psig

Sample in

Zero in Span in

V-51

V-469

VALVE

F-1242

F-383

R-1266 0-10 PSIG

V-563

F-384RELIEF

MODEL

6000

ANALYZER

Teledyne Analytical Instruments

Part II: 1-11

1 Operational Theory Model 6000A

Sample Return to be 1 kg/cmA, non-condensing w/o back-pressure Heat tracing required

Air in 90-120

Hot condensable or Moist Sample in to be heat traced

Zero

Span in

BACK PRESSURE NOT REQURIED IF RETURN IS STABLE AT 1.0 KG CM2A

V-469

V-617 3-50 PSIG

F-383

V-570

6000/6020

@ 100C

R-1266 0-10 PSIG

EX 65OC, E100

OR STEAM

HT'D

CELL

F-384

Sample Return

Calibration Return

Instrument Air in

Nitrogen in

Pressure Relief Valve

Sample in

Hi pressure •200 psig reduce to 5-50 psig

Zero in

Span in

By-Pass Flowmeter 2-20 GPH

Fast loop and By-Pass Filter (5 microns)

(Optional) Heater/cooler

Nitrogen in dry purgeout of cell when auto-zeroing

Sample Temperature Equilibration Module

6000/6020

Analyzer

Cell

zero and span flags for auto-calibration

Sample Flowmeter .2-2 GPH

Differential pressure regulator 3 PSID

1-12 Part II

Teledyne Analytical Instruments

Photometric Analyzer Operational Theory 1

Control

Unit

Detector & Preamplifier

Power Supply

Sample Cell

Source

Model 6000B Photometric Analyzer with D2 Lamp

Analysis Bench shown with Integral General purpose bulkhead

Control Unit

Model 6000B Photometric Analyzer with D2 Lamp

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Part II: 1-13

1 Operational Theory Model 6000A

1-14 Part II

Teledyne Analytical Instruments

Photometric Analyzer Part II: Analysis Unit

Installation

Installation of the Model 6000 Photometric Analyzer includes:

1. Unpacking

2. Mounting

3. Gas connections

4. Electrical connections

5. Testing the system.

2.1 Unpacking the Analyzer

The analyzer is shipped with all the materials you need to install and prepare the system for operation. Carefully unpack the analyzer and inspect it for damage. Immediately report any damage to the shipping agent.

2.2 Installing and Connecting the Analyzer

Without Temperature Control, the system must be installed in an area where the ambient temperature is not permitted to drop below 32°F nor rise above 110°F.

Regardless of configuration, the system must be installed on a level surface with sufficient space allocated on either side for personnel and test equipment access. Subject to the foregoing, the system should be placed as close to the sample point as possible and bolted to its supporting surface. A waterproof mastic should be liberally applied to the under surfaces of all four supporting legs of the cubicle system before placing it in position and bolting it in place.

2.2.1 User Connections

All user connections are around the periphery of the equipment

panel (or cubicle) and appear in the outline diagram in the back of the manual.

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Part II: 2-1

2 Installation Model 6000A

2.2.2 Electrical Power Connections

The system requires a supply of 115 VAC, single-phase power. Power connections are made inside the control unit. Refer to the input-output diagram for more information. The electrical power service ground wire.

A high-quality ground wire is a wire that has zero potential

must include a high-quality

difference when measured to the power line neutral.

2.2.3 Compressed Air Supply

The system may require a supply of air to drive pneumatically activated valves or for use as zero gas. In general, a 2 liter/minute supply of compressed air at a maximum of 150 psig is usually sufficient. The air supply must have far greater capacity when purging of the system or ejectors are used (special systems).

2.2.4 Pipe Connections

Refer to Appendix Piping Drawings for information about pipe connections. On special systems, consult the text in the manual that describes your particular sample system in detail.

2.2.5 Signal and Alarm Output Connections

Signal and alarm output connections are made inside the control unit to terminal blocks mounted on the interface PC board.

Note: For current outputs, the signal circuit resistance, including

accessory devices, must not exceed 1000 ohms. The alarm contact circuit must not draw more than 3 amperes at 115 VAC (non-inductive) or 30 VDC. Refer to the following section.

2.2.6 Sample Delivery System

The sample delivery system should be designed to operate reliably and must be of large enough capacity to avoid flow stops or bubbles in liquid samples. A pump is required only if there is insufficient pressure to reliably supply the sample to the system equipment panel. Do not complicate the delivery system by adding a pump unless it is absolutely necessary. If a pump is required, select a type that can handle the sample (corrosion), as well as meet the area classification and Environmental conditions.

2-2: Part II

Teledyne Analytical Instruments

Photometric Analyzer Part II: Analysis Unit

2.2.7 Draining the System

In liquid analysis systems, the system drain manifold must terminate in a

safe area as the sample may be poisonous or corrosive.

2.3 Testing the System

Before plugging the instrument into the power source:

• Check the integrity and accuracy of the fluid connections. Make sure there are no leaks.

• Check the integrity and accuracy of the electrical connections. Make sure there are no exposed conductors

• Check that sample pressure is between 3 and 40 psig, according to the requirements of your process.

Power up the system, and test it by performing the following

operations:

1. Repeat the Self-Diagnostic Test.

2.4 Calibration

2.4.1 Calibration Fluids

Zero and span fluids must be made by the chemistry lab or certified zero and span gas bought from a gas supplier. The zero fluid must be the major component of the sample, free from the component of interest.

The span fluid must be the major component of the sample mixed with a small amount of the component of interest. The concentration must be 80 to 95% of the range or the widest range of the instrument (if the instrument provides more than one range).

2.4.2 Calibration

Refer to Section 3.3.8 section I of the manual to determine how to manipulate the mode setting. Two calibration methods are available.

1. Calibration with zero and span fluids.

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Part II: 2-3

2 Installation Model 6000A

2. Calibration with a span filter (this method is available only if you select a span filter option when you purchase the equipment.

Method One:

1. Inject zero fluid and set zero as referred in section 3.4 section I

2. Inject span fluid and set the concentration of the span fluid with

the span procedure referred in section 3.4 section I

Method Two:

1. Determine the span setting using Method One.

2. Activate the span filter (as referred in section 3.3.8) section I

3. Record the display reading (this is the span filter reading and must be recorded).

4. You can calibrate the instrument now with the span filter.

Power up the system, and test it as follows:

1. Repeat the Self-Diagnostic Test.

2-4: Part II

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 3

Maintenance

3.0 Routine Maintenance

3.1 Automatic operation and routine operational duties

The system operates continuously without adjustment. Under normal conditions, after you program the system for automatic operation, only routine maintenance procedures are necessary. The most common failure condition is a temporary interruption of the power serving the instrument. If the power service is interrupted, the source lamp in the analyzer will restart automatically as long as there is no defect in the lamp circuit or its starter.

You can detect a lamp off condition with the signal failure alarm circuit, but you must connect the relay contacts from the alarm to your indicating device. In addition, you will experience an alarm condition when the cell windows are extremely dirty or the electronics fail in the detector-converter, log amplifier, or inverter circuits. When the alarm circuit is powered independently from the analyzer power source, the alarm circuit is fail-safe and will detect power failure.

A message such as "Cell Fail check the detector signal" might be

displayed if 1 amp off condition occurs

3.2 System Visual Check and Response Procedure

1. Verify that the signal failure alarm is not in failure condition.

2. Verify that the zero and span control setting have not been disturbed.

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Part II 3-1

3 Maintenance Model 6000A

3. Verify that the chart recorder contains a normal display.

4. Verify that the recorder has a sufficient supply of chart paper and

ink.

3.3 Routine Maintenance

Keep the sample lines and components, including the measuring cell within the analyzer sample module, free of deposits and leaks. You must determine the interval between cleaning procedures empirically, because the duration of time that the system runs without attention is related directly to the sample’s condition.

3.4 Suggested Preventive Maintenance Schedule

DAILY

1. Visually inspect the complete system for obvious defects, such as leaking tubes or connectors.

2. Verify that the sample pump (if applicable) is running.

3. Verify that the signal failure alarm is not in failure condition.

4. Verify that zero and span settings are correct.

WEEKLY

1. Examine sample cell windows for accumulation of solids. Remove and clean as necessary.

2. Calibrate the system.

ANNUALLY

1. Check the electronics calibration.

3-2 Part II

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 3

2. Check the UV source.

NOTE: Be sure to wear UV filtering eye goggles.

3. Check the solenoid valves.

3.5 Service Procedures and Adjustments

3.5.1 Electronics

TAI aligns the system’s electronics. However, you may

need to touch up the circuitry, using the following procedure.

Equipment Required:

Oscilloscope (dual trace is preferred, but not required) To observe

oscilloscope test points switch the vertical input selector of the scope to DC.

Switch to AC to observe the demodulator switch signals.

DVM (Digital Voltmeter)

PC Board Extender

Use the PC board extender whenever you need to adjust trimpot. Because all PC board connectors are keyed to avoid wrong positioning in the connectors, you must remove the key and after testing you need to replace the key with long-nosed pliers. Turn off the power during this operation. Never disconnect or connect the PC boards with the power on, because you may damage the PC board C-MOS devices.

3.5.2 Power Supply Test Points

Measure +15 volt ±1 volt DC and -15 volt ±1 volt DC on the differential power supply PC board in the control unit. Refer to the power supply schematic in the back of the manual to identify the power supply test points.

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Part II 3-3

3 Maintenance Model 6000A

3.5.3 Setup of the Signal Processing Front-End Amplifiers

Fill the sample cell with air or a stable fluid, such that the photo energy that strikes the detector is constant. A stable fluid is distilled or tap water. This step may be omitted when the system is stable in its present state.

If you open the detector module, keep stray light out by covering the opening with a dense black cloth. If you do not take this precaution, the result is a misinterpretation of the scope patterns. On general-purpose systems, the scope test points are in the bottom of the detector module and are accessible without opening the module.

3.5.4 Oscilloscope Display of the I to E Converter Output

The output of the I to E Converter is observed at the output of the second amplifier. The objective of this operation is to set up the optical system and the gain of the second amplifier in such a way that the analyzer keeps operating within its dynamic range.

Connect the oscilloscope to TP3. The oscilloscope displays the measuring and reference pulses in an alternating pattern. The display is created by the light passing through the reference and measuring filters as they are brought in and out of the light beam by the rotating filter wheel. These light pulses are converted to electronic energy which is amplified and brought to TP2. The base line represents the blocking of the light beam by the opaque part of the filter wheel.

To identify which of the pulses is the measuring peak, insert the span filter (when present) or a piece of flat glass or clear plastic in the light beam. The peak that becomes the shortest (retracts excessively) is the measuring filter pulse.

In case you cannot set the gain properly, because the peaks are too short, too tall, or too much out of balance, adjust R2 trimpot on the converter PC board until you obtain the desired peak height as observed on the scope (usually 8 to 9 volt) for the tallest of the two peaks. Never leave the system operating with peaks exceeding 10 volts or you may saturate the logarithmic amplifier. You should not permit oscillations or distortions in the peaks.

3-4 Part II

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 3

3.5.5 Balancing the Optics for Equal Light Transmission with Zero Fluid in the SAMPLE CELL

The objective of this procedure is to obtain measuring and reference peak heights as displayed on the oscilloscope that are approximately equal, with the tallest peaks set at 8 to 9 volts. This must be done with air or zero fluid in the cell.

The procedure is purely mechanical and consists of adjusting the amount of light passing through either the measuring Screens (wire mesh) of varying density are used for this operation and are part of the small took kit accompanying the instrument.

1. Observe the oscilloscope and judge if optical balancing is needed. When the difference is less than 1 volt, balancing is not required. The tallest of the two peaks should be adjusted to 8 or 9 volts with the gain control R2 on the detector PC board. When this cannot be done because both peaks are too short or too long, search for screens mounted in the light path, usually located in a holder on the light pipe which interconnects the detector and sample module, and remove or add screens, as necessary.

or reference filter, never both.

2. When balancing is needed, identify the peaks as outlined under

Section

3. For example, if the reference peak is the shorter one, stop the filter wheel with your hand and see if screens are located behind the reference filter. The reference filter is identified by the letter “R” engraved on the filter wheel.

4. If screens are found, remove them after taking the filter wheel off the shaft with the special Allen wrench supplied in the tool kit.

5. After removal of the screens and remounting the filter, mount the filter wheel back on the shaft. Position it correctly on the shaft by lining up the two paint marks on shaft and wheel.

6. Turn on the instrument and observe the balance on the oscillo-

scope.

a. If the reference peak is now too tall, remove the filter wheel and add a screen of lesser density behind the reference filter. Repeat this procedure until the peaks are within 1 volt of each other.

Teledyne Analytical Instruments

Part II 3-5

3 Maintenance Model 6000A

b. If the measuring peak is equal to or within 1 volt of thereference peak,

the system is optically balanced and ready for calibration.

c. If the peak is still too short, repeat the procedure, but thistime put a

screen behind the measuring filter to shorten its peak.

7. After the peaks are balanced, adjust the gain control until the tallest of the two peaks is 8 to 9 volts. The peaks should still be within1 volt of each other.

8. It is always good practice to operate the analyzer with as as possible. Therefore, with the gain control just barely off its stop, once again remove or add screens in the light path to obtain as high a voltage as possible without exceeding 9 volts for the highest peak. Read-just gain for 8 to 9 volts.

This concludes the balancing procedure and the instrument is ready for

calibration.

low a gain

3.5.6 Setup of the Logarithmic Amplifier

The amplifier is inverting and continuously taking the logarithm of the output signal of the second amplifier. You can observe the output by connecting the scope probe to TP4.

The correct wave shape has a rounded negative going pulse that is the

signal and a flat-topped positive pulse that depicts saturation of the log amplifier.

You should not permit distortions or oscillations in the rounded peaks.

When the positive going pulse is not flat or is distorted, adjust trimpot R3 only enough to obtain a flat positive pulse. If you over adjust, you may lose part of the second decade of absorption and affect the accuracy of analysis for high concentrations of the component of interest where the measuring pulse can become very short. The log amplifier saturates because the amplifier is incapable of taking the logarithm of the slightly negative baseline.

3.5.7 Inverting Amplifier

The amplifier is inverting and has a gain of 1. It inverts the output signal of the logarithmic amplifier and acts as a buffer between the logarithmic amplifier and the reed switch and integrators. To observe the output of the inverter, connect the scope probe to TP5. The wave must be a duplicateof that observed on TP4, except that it is inverted.

3-6 Part II

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 3

3.5.8 Integrated Reference and Measuring Signals

You can observe the reference and measuring signal at the first stage of integration by connecting the scope probe to TP6 (reference signal) and TP7 (measuring signal) at the detector unit. A dual trace scope is advantageous but not required for this observation.

The test points’ significance is that they reveal proper switch action. The display shows a sawtooth pattern that is a charge-discharge of the first capacitor in the integrating network. This ripple is the AC component of the reference and measuring signal after the pulses are converted to DC. The sawtooth patterns must be displayed 180° with respect to each other as viewed with a dual trace scope. They must both be present.

If one is missing, the switch is not switching. If the sawtooth shows a broken pattern, the switching action is feeble or irregular. Usually, you can fix the faulty condition of the switch by slightly changing the switch position.

The action of a bar magnet and a rotating chopper disc activate themagnetic mercury reed switch. An aluminum motor mounting block houses a bar magnet. This bar magnet is parallel with the mercury chopper switch.

The chopper disc is a green and black disc mounted on the filter wheel shaft next to the motor. The disc is composed of both magnetic and nonmagnetic materials. As the shaft rotates, the magnetic portion of the disc shorts the magnetic flux as it passes between the magnet and the switch. The nonmagnetic portion of the disc enables flux lines from the bar magnet to activate the mercury switch.

3.5.9 Battery-Powered Oscilloscope Synchronization Point

Because the line frequency cannot synchronize battery-powered oscillo-

scopes, use TP8 at the detector module to provide external synchronization.

3.6 Interface Board Terminals Strip

At the interface PCB on the Control Unit, are three terminal strip where wiring is distributed to other sections of the Model 6000A System. Such as AC power for the D2 lamp power supply, DC Power to the preamplifier, High DC voltage for the photodetector, and signals to control calibration solenoids and filters. To gain access to this terminals, the silkscreen cover must be removed. These terminals are wired in the factory.

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Part II 3-7

3 Maintenance Model 6000A

WARNING: DANGEROUS HIGH VOLTAGES ARE PRESENT AT

THESE TERMINALS. TRAINED PERSONNEL MUST REMOVE THE SILKSCREEN COVER ONLY. EXERCISE EXTREME CAUTION.

The first strip terminal has three contacts labeled N, G and H. The labels stand for Neutral, Ground, and Hot. This is the AC power strip terminal. It feeds AC power to other components of the Model 6000B System, such as the D2 lamp power supply, heater, and temperature controller PCB.

The second strip terminal has four contacts labeled SHLD, SIG, GND, MEAS and REF. This strip terminals are dedicated to the signals coming from the photodetector amplifier. The labels stand for:

SHLD: Shield. Shield form the preamplifier cable connects to this contact.

3-8 Part II

Teledyne Analytical Instruments

Photometric Analyzer Maintenance 3

SIG GND: Signal Ground. Ground reference for both the measure and the

reference signal.

MEAS: Measure Signal voltage. REF: Reference Signal voltage.

The third terminal strip has eight contacts labeled -230 VDC, +15 VDC, -15 VDC, COM, SPAN FLTR, SPAN SOL, ZERO FLTR, ZERO SOL. This strip feeds the high voltage needed on the cathode of the photodetector, DC power for the photodetector preamplifier, and control signals for the solenoids and filters. The labels stand for:

-230 VDC: This is the negative high voltage fed to the photodetector

cathode, about -230 VDC.

+15 VDC: Power Supply voltage fed to the photodetector preamplifier,

+15 VDC.

-15 VDC: Power Supply voltage fed to the photodetector preamplifier,

-15 VDC.

COM: Common reference to the +/- 15 VDC and the -230 VDC power

supplies.

SPAN FLTR: Span filter signal, AC voltage. SPAN SOL: Span solenoid signal, AC voltage.

ZERO FLTR: Zero filter signal, AC voltage. ZERO SOL: Zero solenoid signal, AC voltage.

Teledyne Analytical Instruments

Part II 3-9

3 Maintenance Model 6000A

3-10 Part II

Teledyne Analytical Instruments

Photometric Analyzer Appendix

Appendix

A-1 Specifications

6000A Digital Control Module:

Ranges: Four Programmable Ranges, field selectable

within limits (application dependent) and Auto Ranging

Display: 2 line by 20 alphanumeric VFD accompanied

by 5 digit LED display

Signal Output: Two 0-1V DC (concentration and range ID)

Two 4-20mADC isolated (concentration and range ID)

RS232

Alarm: Two fully programmable concentration alarm

set points and corresponding Form C, 3 amp contacts. One system failure alarm contact to detect power, calibration, zero/span and sensor failure.

Mounting: Rack/Panel Mount

Operating Temperature: 0-50oC

Teledyne Analytical Instruments

A-1

Appendix Models 6000A

Typical Analytical Performance Specifications:

will vary per application)

(

Accuracy: ±1% of full scale possible

Noise: Less than ±1%

Drift: Less than 1% per day (source/detector depen-

dent)

Diurnal: Less than 1% per 20

dependent)

Sample Cell: Stainless steel with Quartz window standard.

Other materials available.

Cell Length: .01 to 40 inches

F (source/detector

Flow Rate: 50 to 1500 cc/min

Light Source: Tungsten Lamp, Mercury, Deuterium Arc

Sensitivity: .02 to 3 absorbance units.

Reproducibility: +/-2% of scale or better

Filter Wavelength: 210 to 1000 millimicrons, application depen-

dant

Sample Pressure: Quartz window: 30 psi

A-2

Teledyne Analytical Instruments

Photometric Analyzer Appendix

A-2 Recommended 2-Year Spare Parts List

QtyP/NDescription

C-67435B Motherboard, Control Unit C-62374 Power Supply PCB C-67990 Amplifier, Control Unit C-69205 6000A Interface PCB 1 A-9306 Differential Power Supply 1 C-40265A Measuring PCB 1 C-54799 D2 Power Supply 1 C-54802 Controller, D2 Power Supply 1 C-14449 Temperature Controller, Sample Cell 1 L-179 Source Lamp 5 F-57 Fuse, 5A Slo-Blo 5 F-14 Fuse, 10A Slo-Blo 1 P-43 Phototube 2 C87 Sample Cell Window (Quartz) 6 O81 Viton O-Ring 1 A-16776 Accessory Kit 2 F1295 Fuse, 4A slo-blo _____________________

Note: Orders for replacement parts should include the part number (if

available) and the model and serial number of the instrument for which the parts are intended.

Orders should be sent to:

TELEDYNE Analytical Instruments

16830 Chestnut Street City of Industry, CA 91749-1580

Phone (626) 961-9221, Fax (626) 961-2538 TWX (910) 584-1887 TDYANYL COID

or your local representative.

Teledyne Analytical Instruments

A-3

Appendix Models 6000A

A-3 Drawing List

D67061: Outline Drawing (standard unit with optional sealed ref.)

D67056: Outline Drawing (with optional gas selector panel and/or sealed

ref.)

A63532: Piping Diagram

D-63534: Wiring Diagram / Interconnect Drawing

D-67989 Interface PCB Schematic

D-67998 Amplifier PCB Schematic

A-38750 Phototube Power Supply Schematic

B-36470 Detector Module-Phototube Schematic

B-37533 Detector-Converter PCB-Phototube Schematic

B-55819 D2 Power Supply Module Schematic

D-54797 D2 Power Supply PCB Schematic

B-15016 Temperature Controller PCB-Sample Cell Schematic

A-40510 Sample Cell Heater Schematic

D-54800 Controller PCB, D2 Lamp Schematic

C-36468 Detector Module-Phototube Schematic

C55106 D2 Source Power Supply Schematic

B-55110 Back Panel, D2 Power Supply Wiring Diagram

A-4

Teledyne Analytical Instruments

Teledyne 6000A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual