Teledyne 6600 User Manual

Oil in Water Analyzer

OPERATING INSTRUCTIONS

Model 6600

Oil in Water 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

P/N M71055

12/22/99

ECO # 99-0000

i

Model 6600

Copyright © 1999 Teledyne Analytical Instruments

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.

ii

Teledyne Analytical Instruments

Oil in Water Analyzer

Table of Contents

Part I: Control Section .................................Part I

Part II: Analysis Section .............................Part II

Part III: Oil in Water Sample System......... Part III

Appendix, Generic Info...................................A-1

Teledyne Analytical Instruments

iii

Model 6600

iv

Teledyne Analytical Instruments

Part I: Control Section

OPERATING INSTRUCTIONS

Model 6600

Oil in Water Analyzer

Part I: Control Section

of the Control/Analysis Unit

Z-PURGED

CLASS I, DIVISION II, GROUPS B, C, and D

Teledyne Analytical Instruments

Part I: i

Model 6600 Oil in Water 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 Operator Interface .......................................................... 1-2

1.4.1 UP/DOWN Switch ................................................ 1-3

1.4.2 ESCAPE/ENTER Switch ..................................... 1-3

1.5 Control Unit Interface Panel ........................................... 1-6

2 Installation

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

2.2 Electrical Connections ................................................... 2-1

2.3 Testing the System......................................................... 2-9

3 Operation

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

3.2 Using the Controls ......................................................... 3-1

3.2.1 Mode/Function Selection ....................................... 3-2

3.3 The System Function ..................................................... 3-4

3.3.1 Setting up an Auto-Cal........................................... 3-5

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

3.3.2.1 Entering the Password................................... 3-6

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

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

3.3.4 System Self-Diagnostic Test .................................. 3-9

3.3.5 The Model Screen ................................................. 3-10

3.3.6 Checking Linearity with Algorithm ......................... 3-10

3.3.7 Digital Flter Setup .................................................. 3-11

3.3.8 Homogenizer Function Setup ................................ 3-12

3.3.9 Hold/Track Setup ................................................... 3-13

3.3.10 Calibration/Hold Timer Setup................................. 3-14

ii: Part I

Teledyne Analytical Instruments

Part I: Control Section

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

3.3.12 Manual Control of Filter & Solenoids ..................... 3-15

3.4 The Zero and Span Functions ....................................... 3-16

3.4.1 Zero Cal ................................................................. 3-17

3.4.1.1 Auto Mode Zeroing ........................................ 3-17

3.4.1.2 Manual Mode Zeroing.................................... 3-18

3.4.1.3 Zero Offset Calibration................................... 3-19

3.4.1.4 Cell Failure .................................................... 3-19

3.4.2 Span Cal................................................................ 3-21

3.4.2.1 Auto Mode Spanning ..................................... 3-21

4.4.2.2 Manual Mode Spanning................................. 3-21

3.5 The Alarms Function...................................................... 3-22

3.6 The Range Select Function ........................................... 3-24

3.6.1 Manual (Select/Define Range) Screen .................. 3-25

3.6.2 Auto Screen ........................................................... 3-25

3.6.3 Precautions............................................................ 3-26

3.7 The Analyze Function .................................................... 3-27

3.8 Programming ................................................................. 3-28

3.8.1 The Set Range Screen .......................................... 3.29

3.8.2 The Curve Algorithm Screen ................................. 3-30

3.8.2.1 Manual Mode Linearization ........................... 3-30

3.8.2.2 Auto Mode Linearization................................ 3-30

4 Maintenance

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

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

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

A Appendix

Model 6600 Specifications..................................................... A-3

Teledyne Analytical Instruments

Part I: iii

Model 6600 Oil in Water Analyzer

iv: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Introduction

1.1 Overview

The Teledyne Analytical Instruments Model 6600 Control Section,
together with a 6600 Analysis Section, is versatile microprocessor-based
instrument.

Part I, of this manual covers the Model 6600 General Purpose, Bulk­head Mount Control Section. (The Analysis Section is covered in Part II of
this manual, and Oil in Water application is covered in Part III) The Control
Section is for indoor/outdoor use in hazardous environment only. The
Analysis Section (or Remote Section) can be designed for a variety of
hazardous environments. All Sections are mounted in a NEMA-4 enclosure
(24”x20”x10”).

1.2 Typical Applications when Configured
with the appropriate Sample System

A few typical applications of the Model 6600 are:

• Offshore platforms, Produced Water, Sea Water

• Waste Water, Tank Farms, Fuel Depots, Refinery Effluents

• Oil Chemical Separators

• On-Board Ship

• Boiler Return Steam Condensate

• Process Cooling Water

• Bilge/Deballast Water Treatment

• Water Soluble Oils

• All Aromatic Hydrocarbons

• Many Organic Hydrocarbons (Contact Factory)

Teledyne Analytical Instruments

Part I: 1-1

1 Introduction Model 6600

1.3 Main Features of the Analyzer

The Model 6600 Photometric Analyzer is sophisticated yet simple to

use. The main features of the analyzer include:

• 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-Manual or Automatic (optional).

1.4 Operator Interface

All controls and displays on the standard 6600 are accessible from
outside the housing. The instrument has two simple operator controls. The
operator has constant feedback from the instrument through an alphanumeric
display, and a digital LED meter. The displays and controls are described
briefly here and in greater detail in chapter 3. See Figure 1-1.

1-2: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

1.4.1 UP/DOWN Switch

The UP/DOWN switch is used to select between any subfunctions displayed
on the VFD screen such as in the main menue, the system menue, the Alarm
menue, etc. When modifiable values are displayed on the VFD, the UP/DOWN
switch can be used to increment or decrement the values.

1.4.2 ESCAPE/ENTER Switch

The ESCAPE/ENTER switch is used to input the data, to enter a function,
or to exit a function displayed in the alphanumeric display:

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

series. If none remains, returns to Analyze mode screen.

• Enter Within a menue: the funtion selected is entered moving on

to the next screen in a series.

WARNING:

The power cable must be disconnected to fully remove power
from the instrument.

With Value selected: Enters the value into the analyzer as
data. Advances cursor on VFD to the next operation.

In the Analyze mode: it calls the main menue. Functions
called out by the main menue:

-System This function is a menu that calls a number

of functions that regulate the analyzer
operation.

-Span This function spans the instrument.

-Zero This function zeros the instrument.

-Alarms This functions sets the alarm preferences.

-Range This function selects whether analyzer is

autoranging or locked on one range.

-Standby Places the analyzer in a sleep mode.

Teledyne Analytical Instruments

Part I: 1-3

1 Introduction Model 6600

Figure 1-1: Model 6600 Controls, Indicators, and Connectors

.

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 6600 models
produce continuous readout from 0-10,000 ppm and then switch to
continuous percent readout from 1-100 %.

1-4: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Figure 1-2: Model 6600 Interface Panel

Teledyne Analytical Instruments

Part I: 1-5

1 Introduction Model 6600

Alphanumeric Interface Screen: The backlit VFD screen is an easy-

to-use interface between operator and analyzer. It displays values, options,
and messages for immediate feedback to the operator.

1.5 Control Section Interface Panel

The Control Section 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.

• 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 Section.

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.

• 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 6600 is accurate to 2-3 %. Accordingly, internally sched­uled calibrations can vary 2-3 % per day.

1-6: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Installation

Installation of Model 6600 Analyzers includes:

1. Unpacking, mounting, and interconnecting the Control/Analysis
Section

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 Section. (Installation of
the Analysis Section is covered in Part II of this manual.) The Oil in Water
application is covered in Part III.

2.1 Unpacking the Control/Analysis Unit

The analyzer is shipped with all the materials you need to install and
prepare the system for operation. Carefully unpack the Control/Analysis
Unit and inspect it for damage. Immediately report any damage to the ship­ping agent. Figure 2-2: Required Front Door Clearance

Allow clearance for the door to open in a 90-degree arc of radius 15.5
inches. See Figure 2-2.

Figure 2-2: Required Front Door

Clearance

1

5

.

5

”

2.2 Electrical Connections

Figure 2-3 shows the Control/Analysis 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.

Teledyne Analytical Instruments

Part I: 2-1

2 Installation Model 6600

Figure 2-3: Interface Panel of the Model 6600 Control Section

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.

Primary Input Power: The power supply in the Model 6600 will

accept a 115 Vac, 50/60 Hz power source. See Figure 2-4 for detailed
connections.

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

long as the instrument is connected to the power
source. The standby function switches power on or
off to the displays and outputs only.

115VAC

2-2: Part I

Figure 2-4: Primary Input Power Connections

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Fuse Installation: The fuse holders accept 5 x 20 mm, 4.0 A, T

type (slow blow) fuses. Fuses are not installed at the factory. Be sure to
install the proper fuse as part of installation (See Fuse Replacement in
chapter 4, maintenance.)

Analog Outputs: There are eight DC output signal connectors on

the ANALOG OUTPUTS terminal block. 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 = Range 1, 0.5 V = Range 2, 0.75 V =

Range 3.

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 = Range 1, 12 mA = Range 2,

16 mA = Range 3.

Examples:

Figure 2-5: Analog Output Connections

Teledyne Analytical Instruments

Part I: 2-3

2 Installation Model 6600

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

Concentration 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.

2-4: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Table 2-2: Analog Range ID Output - Example

Range Voltage (V) Current (mA)

Range 1 0.25 8
Range 2 0.50 12
Range 3 0.75 16

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).

Normally closed
Normally open
Moving contact

Figure 2-6: Types of Relay Contacts

Normally open

Moving contact

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.

• Can be configured as latching or nonlatching.

• Can be configured out (defeated).

Teledyne Analytical Instruments

Part I: 2-5

2 Installation Model 6600

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 3-5.

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 SPAN mode. Either side may be
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.)

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

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

2-6: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Remote Calibration Protocol: To properly time the Digital Remote
Cal Inputs to the Model 6600 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 terminal strip (section 3.6 Part III) 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 four ranges are assigned to relays in ascending order—Range 1 is
assigned to RANGE 1 ID, Range 2 is assigned to RANGE 2 ID, Range 3
is assigned to RANGE 3 ID, and Range 4 is assigned to RANGE 4 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.

Table 2-3: RS-232 Signals

RS-232 Sig RS-232 Pin Purpose

DCD 1 Data Carrier Detect

Teledyne Analytical Instruments

Part I: 2-7

2 Installation Model 6600

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 6000B/6600.

Table 2-5: Required RS-232 Options

2-8: Part I

Parameter Setting

Baud 2400

Byte 8 bits

Parity none

Stop Bits 1

Message Interval 2 seconds

Teledyne Analytical Instruments

Oil in Water Analyzer Part I: Control Section

Remote Bench and Solenoid Valves: The 6600 is a single-chassis

instrument. However, the REMOTE BENCH and SOLENOID RETURN
connectors are provided on the interface PCB. The Remote Bench is wired
at the factory as well as any optional solenoid valves included in the system.

2.3 Testing the System

After The Control/Analysis Unit is both installed and interconnected,

and the system gas and electrical connections are complete, the system is
ready to test. Before plugging the unit into its 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.

• Turn homogenizer power potentiometer fully counter-clockwise
(OFF), see section 3.3.8 for operation of homogenizer.

Warning: Do not operate the “ultrasonic homogenizer” in the

instrument for more than one (1) minute without a
liquid sample properly flowing through the homog­enizer.

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

1. Repeat the Self-Diagnostic Test.

2. Zero the instrument.

3. Span the instrument.

For steps 2 and 3, refer to part II for gas calibration, and part III for Oil

in Water application.

Teledyne Analytical Instruments

Part I: 2-9

2 Installation Model 6600

2-10: Part I

Teledyne Analytical Instruments

Oil in Water Analyzer Operation 3

Operation

3.1 Introduction

Although the Model 6600 is usually programmed to your application at the
factory, it can be further configured at the operator level, or even, cautiously,
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 Controls

To get the proper response from these controls, turn the control toward the
desired action (ESCAPE or ENTER—DOWN or UP), and then release it.
Turn-and-release once for each action. For example, turn-and-release twice
toward UP to move the VFD screen two selections upwards on the list of
options (menu).

Teledyne Analytical Instruments

Part I 3-1

3 Operation Model 6600

The item that is blinking on the screen is the item that is currently selectable
by choosing ENTER (turn-and-release toward ENTER with the ESCAPE/
ENTER control).

In these instructions, to ENTER means to turn-and-release toward EN­TER, and To ESCAPE means to turn-and-release towards ESCAPE. To scroll
UP (or scroll DOWN) means to turn-and-release toward UP (or DOWN) as
many times as necessary to reach the required menu item.

3.2.1 Mode/Function Selection

After the instrument has been powered up, and its initilization routine
performed, the instrument will settle in the Analyze mode. To call up the Main
menu from the Analyze mode, toggle the Enter switch. To return to the Analyze
mode, toggle the Escape switch. The Main menu screens looks as shown
below:

SYSTEM SPAN ZERO
ALARM RANGE STBY

The Main menue screen is the top level in a series of screens used to
configure the analyzer. The DOWN/UP selects the different options displayed
in the VFD screen. The selectable option blinks on the VFD screen when you
reach the desired option, toggle the Enter switch.

The Escape switch takes you back up to hierarchy of screens until you
return back to the Analyze screen mode. Here is a brief description of the Main
Menu:

• System. The system function consists of nine subfunctions.
Four of these are for ordinary setup and operation:

• Setup an Auto-Cal

• Assign Passwords

• Log out to secure system

• Initiate a Self-Test

Three of the subfunctions do auxiliary tasks:

Two of these are for programming/reprogramming the analyzer:

3-2 Part I

• Checking model and software version

• Adjust electronic filter of the signal

• Display more subfunctions

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

Teledyne Analytical Instruments

Oil in Water Analyzer Operation 3

System

Dig_filt

SELF-TEST

PWD

LOGOUT

MORE

AUTOCAL

HMGNZR

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

Set Ultrasonic
Homogenizer

ON/OFF

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

Enter

Change

Password

Enter

Verify

Password

Enter

MORE

ALGORITHM

APPLICATION

MODEL

OUTPUT_CAL

Select range

Select range

Display

Model/Version

Zero Analog

Output

Display gas use

and range

Define

Application/

Range

Enter

Enter

Select

Verify/Setup

Enter

Calibrate

Analog

Output

Verify data

Points

Auto/

Manual

linear Cal.

Enter

Enter

Enter

Input/Output

Enter Span

gas value

Figure 3-1: Hierarchy of System Functions and Subfunctions

Enter

Enter

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3 Operation Model 6600

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

• Zero. Used to set up a zero calibration.

• Span. Used to set up a span calibration.

• Alarms. Used to set the alarm setpoints and determine whether

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

• Range. Used to set up four analysis ranges that can be switched

automatically with autoranging or used as individual fixed
ranges.

Any function can be selected at any time in the analyze mode (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

the appropriate point in the procedure, in a Monospaced type style.

3.3 The System Function

The subfunctions of the System function are described below. Specific

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.

• HMGNZR: Turn Ultrasonic homogenizer ON and OFF on the

analyze mode.

• 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.

• ALGORITHM: Linearize the output for nonlinear characteristic.

3-4 Part I

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Oil in Water Analyzer Operation 3

• APPLICATION: Used to define the analysis ranges and application

(gas used).

• MODEL: Displays model number and software version.

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

The hierarchy of the system menu is shown in figure 3-1.

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.

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

AUTO-CAL control where possible. The internal clock in the
Model 6600 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 main manu. TheVFD will display five subfunc-

tions.

DIG_FILT SELF—TEST
PWD LOGOUT MORE

Select MORE and Enter

AUTOCAL HMGNZR H OLD
CAL-HOLD-TIMER MORE

Use UP/DOWN to blink AUTO—CAL, and Enter. A new screen for

ZERO/SPAN set appears.

ZERO in Ød Øh off
SPAN in Ød Øh off

Use UP/DOWN to blink ZERO (or SPAN), then 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

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3 Operation Model 6600

UP/DOWNUP/DOWN

Use

UP/DOWN to set the day interval, hour interval, then Enter

UP/DOWNUP/DOWN

Enter to turn ON the SPAN and/or ZERO cycles (to activate AUTO–CAL).
Use the UP/DOWN to toggle the field between ON and OFF. Press Enter to
return to The AUTO-CAL menu. You should be able to see that the screen has
been updated with your new input. Escape to return to the System menu.

For Oil & Water Samples only setting of the Zero schedule is need­ed. Instrument will automatically perform a Span at the end of a sched­uled Zero.

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.

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 uses the Enter
switch 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 ENTER the old password first. If the default password is in
effect, using ENTER three times will enter the default TAI password for you.

Enter the System menu...

DIG_FILT AUTO—CAL
PWD LOGOUT MORE

Use theUP/DOWN to scroll the blinking over to PWD, and 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.

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Oil in Water Analyzer Operation 3

Enter password:
T A I

or

Enter password:
A A A

The screen prompts you to enter the current password. If you are not using

password protection, Enter three times to accept TAI as the default password.

If a password has been previously installed, enter the password using the UP/

DOWN SWITCH to change the first letter.

Use Enter to move to the next letter. You cannot go back. If a mistake is

made, Escape to the System menu and return.

When you finish adjusting the last letter, toggle the Enter switch

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

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

nter to change the password (either the default TAI or the previously
assigned password), or 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 UP/DOWN SWITCH 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[¥]^

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3 Operation Model 6600

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

When you have finished typing the new password, press Enter. A verifica-

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

Enter PWD To Verify:
A A A

Use the UP/DOWN to retype your password and Enter at the end of
each letter. 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 screen appears as:

1.95 ppm SO
nR1: Ø — 1Ø Anlz

2

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.

2

3.3.3 Logging Out

The LOGOUT function provides a convenient means of leaving the analyz-
er 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, enter the

System menu.

DIG_FILT SELF-TEST
PWD LOGOUT MORE

Use theUP/DOWN to position the blinking over the LOGOUT function,

and Enter to Log out. The screen will display the message:

3-8 Part I

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Oil in Water Analyzer Operation 3

Protected until
password entered

After two seconds it will return to the System menu.

3.3.4 System Self-Diagnostic Test

The Model 6600 has a built-in self-diagnostic testing routine. Pre-pro­grammed 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.)

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

in the sampling cell at the time of the SELF-TEST input thru the
sample inlet.

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. If
any of the functions fails, the System Alarm is tripped, but is not tripped at the
startup because it might give false alarm after a power failure. To initiate a self
diagnostic test during operation enter the System menu.

DIG_FILT SELF-TEST
PWD LOGOUT MORE

Use the UP/DOWN again to move the blinking to the SELF–TEST and

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.

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3 Operation Model 6600

3.3.5 The Model Screen

Enter the System menu, select more and Enter. The second screen ap-

pears. Select more again and Enter. In the third screen select MODEL. With

MODEL blinking, Enter. The screen displays the manufacturer, model, and

software version information. Escape to return to the System menu.

3.3.6 Checking Linearity with ALGORITHM

From the System Function screen, select ALGORITHM, and Enter.

sel rng to set algo:
—> Ø1 Ø2 Ø3 <—

Use the UP/DOWN switch to select the range: 01, 02, or 03. Then

Enter. (Some ranges may not be available, depending on your application, but

at least range 01 should be).

Gas Use: SO2
Range: Ø — 10%

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 UP/DOWN switch 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)

3-10 Part I

Select algorithm
mode : AUTO

Teledyne Analytical Instruments

Oil in Water Analyzer Operation 3

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.

NOTE: If input and output are set to 0.00 for all data points, it

might be that your application is linear.

3.3.7 Digital Filter Setup

The 6600 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. Enter the System menu

DIG_FILT SELF-TEST
PWD LOGOUT MORE

2. DIG_FILT will flash, ENTER,

Weight of digital
Filter: 9

3. The number on the second row will flash and can be set by
using the Up/Down switch

4. Press Escape to return to the System menu.

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

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3 Operation Model 6600

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.

3.3.8 Homogenizer Function Setup

Depending on the application, the 6020 sampling system may have an
Ultra Sonic Homogenizer. The function of this part is to prevent the oil in the
water from clumping together. The homogenizer should turn on after the initial
warm up and self-diagnostic period when the analyzer enters the Analyze mode.
The homogenizer will turn off automatically as soon as the analyzer enters the
Zero and Span mode, turning back on at the end.

Under some conditions, it might be desirable to manually turn the Ultra
Sonic Homogenizer off. The homogenizer set up function is provided in the
System menu. To access the Homogenizer function setup:

1. Enter the System menu.

2. Select MORE in the first System menu using the UP/DOWN switch.

3. Select HMGNZR in the second System menu, the screen will display

Set Ultra Sonic
Homogenizer: ON

4. By using the UP/DOWN switch the homogenizer can be toggled on and off.

5. Enter or Escape to return to the analyze mode.

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Oil in Water Analyzer Operation 3

Every time the power is cycled, the homogenizer defaults to ON. So if

homogenizer was off and the power is cycled, the homogenizer will turn on.

Warning: Do not operate the “ultrasonic homogenizer” in the

instrument for more than one (1) minute without a
liquid sample properly flowing through the homoge­nizer.

3.3.9 Hold/Track Setup

The 6600 has ability to disable the analog outputs and freeze the display

while undergoing a scheduled or remote calibration. The 6600 will track

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

1. Enter the System menu:

DIG_FILT SELF-TEST
PWD LOGOUT MORE

2. Using the UP/DOWN switch, select MORE and Enter. The

Second System screen appears:

AUTOCAL HMGNZR TRACK
CAL-HOLDER-TIMER MORE

or

AUTOCAL HMGNZR HOLD
CAL-HOLD-TIMER MORE

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

HOLD by toggling Enter switch. 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.

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3 Operation Model 6600

3.3.10 Calibration/Hold Timer Setup

This Calibration Timer lets the operator adjust the time the instrument
purges the calibration gas prior to actually starting 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. Enter the System menu:

DIG_FILT SELF-TEST
PWD LOGOUT MORE

2. Using theUP/DOWN switch, select MORE and press Enter:

The Second System screen appears:

AUTOCAL HMGNZR TRACK
CAL-HOLD-TIMER MORE

or

AUTOCAL HMGNZR HOLD
CAL-HOLD-TIMER MORE

3. Select with the UP/DOWN switch 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 4-20mA Output Calibartion

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. Enter the System menu:

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Oil in Water Analyzer Operation 3

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 HMGNZR TRACK
CAL-HOLD-TIMER MORE

or

AUTOCAL HMGNZR 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 OUT_CAL ANLZ

4. Select OUTPUT_CAL and Enter

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. Enter when done.

5. 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. Enter when done to return to system
menu.

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 Manual control of filter and solenoids

For troubleshooting purposes, you have manual access to control
calibration filter and solenoid on the Analyze mode. To have manual access to
the calibration filter and solenoid:

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3 Operation Model 6600

-Enter the System Menu

-Select MORE on the first and second System menu screens.

-In the last System Menu screen you will see:

ALGORITHM APPLCATION

MODEL OUT_CAL ANLZ

-Select the last field “ANLZ” using the Up/Down switch.

-Press Enter to change the mode of the filter and the solenoid. The se-

quence is as follows:

1. ZERO: Sets the Filter and solenoid in the zero mode (span filter off,
zero solenoid on).

2. SPN1: Sets the Filter and solenoid in the span mode (span filter on,
zero solenoid on).

3. SPN2: Sets second span filter on (usually not installed) and zero
solenoid on

4. SPNB: Sets both span filter on (usually only one filter installed) and
zero solenoid on.

5. ANLZ: Returns Filters and solenoid to the Analyze mode (span filter
off, zero solenoid off).

-Press Escape to see the effect

NOTE: FOR PROPER OPERATION OF THE ANALYZER

RETURN TO ANLZ MODE.

3.4 The Zero and Span Functions

The Model 6600 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.

CAUTION: Always allow one hour 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.

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Oil in Water Analyzer Operation 3

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.

Readjust the gas pressure into the analyzer until the flowrate through the
Sample Cell settles between 50 to 500 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 function on the main menu is used to enter the zero calibration

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

Make sure the zero fluid is flowing to the instrument. If you get a CELL
CANNOT BE BALANCED message while zeroing skip to section 3.4.1.3.

3.4.1.1 Auto Mode Zeroing

Observe the precautions in sections 3.4 and 3.4.1, above. Enter the zero
function mode. The screen allows you to select whether the zero calibration is to

be performed automatically or manually. Use the UP/DOWN switch to toggle

between AUTO and MAN zero settling. Stop when AUTO appears, blinking, on
the display.

Select zero
mode: AUTO

Enter to begin zeroing.

####.## ppm OIL
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 12 sec, instead of
Slope you will see a countdown: 9 Left, 8 Left, and so fourth. These are

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3 Operation Model 6600

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.

NOTE: In a Oil/Water sampling system, when performing a sched­uled zero, instrument will go to span mode automatically (when span flag
option has been purchased).

####.## ppm OIL
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

Enter the Zero function. The screen that appears allows you to select

between automatic or manual zero calibration. Use the UP/DOWN switch
between AUTO and MAN zero settling. Stop when MANUAL appears, blinking,
on the display.

Select zero
mode: MANUAL

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 first­stage zero offset. The microprocessor samples the output at a predetermined
rate.

####.## ppm OIL
Zero adj:2048 C—Zero

The analyzer goes through C–Zero, F–Zero, and S–Zero. During C–Zero

and F–Zero, use the UP/DOWN SWITCH to adjust displayed Zero adj: value
as close as possible to zero. Then,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).

####.## ppm OIL
Slope=#.### S—Zero

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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Oil in Water Analyzer Operation 3

3.4.1.3 Detector Failure

Detector failure in the 6600 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 6600 system alarm trips, and
the LCD displays a failure message.

Detector cannot be balanced
Check your zero fluid

Before optical balancing:

a. Check your zero fluid 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 for liquids and 1000CCM for gases.
d. Check temperature controller board.
e. Check sample temperature.
f. Check the Sample Cell for dirty windows.
g. Perform a Zero calibration in the manual mode.
h. Check for air bubbles in liquid applications.

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

chapter 3, part II.

3.4.1.4 Zero Offset Calibration

To access this function, the instrument zero mode must be entered by
pushing the Zero key on the front panel of the control unit. The VFD display will
show the following menu selection:

Select zero
mode: AUTO

or

Select zero
mode: MAN

Select whether you want the instrument to do an automatic or manual zero. If
you do an automatic zero, the instrument does the zero by itself. If you do a
manual zero you must manually enter inputs to the instrument to accomplish the
zero, see in the corresponding section of the manual on how this two functions
differ.
When the Enter key is pressed, the following menu will appear:

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3 Operation Model 6600

Zero off: 0.0 ppm
<ENT> to begin Zero

The offset value can be modified by using the Up/Down keys. Next section
shows how to select this value. Suffice to say that whatever value you enter, will
be automatically added to the reading. Thus, if you entered -0.1 ppm, at the end
of the zero the display will show -0.1 ppm.

Once the Enter key is pressed the instrument enters the zero mode. If you chose
AUTO zero mode, the instrument will do the work of bringing the reading back
to zero plus the offset value that was entered. If you chose MANual zero mode,
then you must enter input to the instrument as explained in the corresponding
section of the manual but with one difference: instead of bringing the display to
read zero, you must make the display read zero plus the value entered as offset.

How the offset value is selected:

To find out what the offset value should be, the intended zero calibration gas and
the a mix of the process background gas must be procured. This of course
assumes that the zero gas and the process background gas are very different and
that an offset will occur.

1. Let the intended zero calibration gas flow through the 6600 sample cell (this
assumes that you have started up you system as recommended by the manual or
technical personnel) and do a zero on the instrument. Leave the offset set to zero
value.

2. At the end of the zero function, make sure the analyser reads zero.

3. Flow the process background gas mix through the 6000 sample cell on the
Analyse mode. Wait for the reading to become stable. Write the reading down.
Change the sign of the reading: This is the offset to be entered.

4. Do a manual run to check. Reintroduce the zero calibration gas. Start a zero
on the analyser but this time enter the offset value.

5. At the end of the zero function, check that the instrument reads the entered
offset.

6. Reintroduce the process background gas mix to the 6000 sample cell in the
Analyse mode. It should read close to zero once the reading is stable (+/- 1%
error of full scale).

Spanning the 6600:

Since the instrument might be spanned with background gas the same as the
zero calibration gas, the span value to be entered should be the span
concentration plus the offset value (if the offset value has a minus sign then
algebraically it becomes a subtraction).

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Oil in Water Analyzer Operation 3

3.4.2 Span Cal

The Span function on the main menu is used to span calibrate the analyzer.

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

Make sure the span fluid is flowing to the instrument.

3.4.2.1 Auto Mode Spanning

Observe all precautions in sections 3.4 and 3.4.2, above. Enter the span

function. The screen that appears allows you to select whether the span calibra-

tion is to be performed automatically or manually. Use the UP/DOWN SWITCH

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

Select span
mode: AUTO

Enter to move to the next screen.

Span Val: 2Ø.ØØ %
<ENT> twice to start

The unit field should be blinking first (%/ppm). Use the UP/DOWN switch
to set the proper unit of the span fluid and enter. Then, use the UP/DOWN
switch to set the concentration. When you have set the concentration of the

span fluid you are using, Enter to begin the Span calibration.

####.## ppm OIL
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

Enter 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

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3 Operation Model 6600

Use the UP/DOWN switch to toggle between AUTO and MAN span

settling. Stop when MAN appears, blinking, on the display. Enter to move to

the next screen.

Span Val: 100 ppm
<ENT> To begin span

The unit field should be blinking first (%/ppm). Use the UP/DOWN switch
to set the proper unit of the span fluid and enter. Then, use the UP/DOWN
switch to set the concentration.

When you have set the concentration of the span fluid you are using, Enter

to 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.

####.## ppm OIL
Slope=#.### Span

When the Span value displayed on the screen is sufficiently stable, Enter.
(Generally, when the Span reading changes by 1 % or less of the range being

calibrated for a period of 30 seconds it is sufficiently stable.) Once the span
ends, the calibration is stored in memory. The instrument then automatically

enters the Analyze function.

3.5 The Alarms Function

The Model 6600 is equipped with 2 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:

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Oil in Water Analyzer Operation 3

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.

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
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.

Select the Alarm function on the main menu to enter the Alarm function.

Use UP/DOWN to select either AL1 or AL2. If you must change the %/ppm
units, keep using UP/DOWN until you get to the units to be modified. Use Enter
to toggle between % and ppm.

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3 Operation Model 6600

Use the UP/DOWN to choose the alarm again. Then Enter to move to

the next screen.

AL1: 1ØØØ ppm HI
Dft:N Fs:N Ltch:N

Five parameters can be changed on this screen:

• 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).

• To define the setpoint use the UP/DOWN switch to change the
number. Holding down the key speeds up the incrementing or
decrementing. Enter when done, blinking cursor moves to the
next field.

• To set the other parameters use the UP/DOWN key, and then
Enter to move to the next field..

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

• To reset a latched alarm, go to Dft– and then toggle either Up or
DOWN two times. (Toggle it to Y and then back to N.)

–OR –

Go to Ltch– and then toggle either UP two times or DOWN two
times. (Toggle it to N and back to Y.)

3.6 The Range Select Function

The Range function allows you to manually select the concentration 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.

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.

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Oil in Water Analyzer Operation 3

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.

Enter the Range function to start the Range function.

Select range
mode: MANUAL

If above screen displays, use the UP/DOWN switch to Select MANUAL,
and Enter.

Select range to run
—> Ø1 Ø2 Ø3 <—

NOTE: Oil in Water applications require single range (01) measurement.

Use the UP/DOWN switch to select the range: 01, 02, 03, or 04. Then
Enter.

Gas use: OIL
Range: Ø — 100 ppm

The high-end of the range field should blink first. Use UP/DOWN switch
to change the value of the field, Enter to move to the low-end of the range field.

Escape to return to the previous screen to select or define another range.

Enter to return the to the Analyze function.

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.

The autoranging feature can be overridden so that analog output stays on a
fixed range regardless of the contaminant concentration detected. If the conce-

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3 Operation Model 6600

tration 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 Range function
Manual screen, and the application gases can be redefined using the System

function, if they are not already defined as necessary.

CAUTION: Redefining applications or ranges might require

relinearization and/or recalibration.

To setup automatic ranging:

Enter the Range function to start the Range function.

Select range
mode : AUTO

If above screen displays MAN, use the UP/DOWN switch to Select
AUTO, and Enter.

Press Escape to return to the previous Analyze Function.

3.6.3 Precautions

The Model 6600 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

• 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

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Oil in Water Analyzer Operation 3

• 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.

• In Oil and Water applications, because the range and cell path are
pertinent to the water background and preparation of zero fluid
by the sample system, the autorange feature should not be used.
Only single range is recommended.

Figure 3-2 illustrates these schemes graphically.

0 0.01 0.1 80 90 100

Figure 3-2: Examples of Autoranging Schemes

3.7 The Analyze Function

Normally, all of the functions automatically switch back to the Analyze
function when they have completed their assigned operations. The Escape key
in many cases also switches the analyzer back to the Analyze function.

The Analyze function screen shows the impurity concentration in the first

line, and the range in the second line. In the lower right corner, the abbreviation

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3 Operation Model 6600

Anlz indicates that the analyzer is in the Analyze mode. If there is an * before

the Anlz, it indicates that the range is linearized.

1.95 ppm SO2
R1:Ø —10 *Anlz

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. Enter the System menu.

DIG_FILT SELF-TEST
PWD LOGOUT MORE

Use the UP/DOWN switch to blink MORE, then Enter.

AUTOCAL HMGNZR HOLD
CAL-HOLD-TIMER MORE

Select MORE and ENTER one more time

ALGORITHM APPLICATION
MODEL OUTPUT: 4MA

Now you will be able to select the APPLICATION and ALGORITHM

set-up functions.

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Oil in Water Analyzer Operation 3

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.

Note: It is important to distinguish between this System program-

ming subfunction and the Range button function, which is an
operator control. The Set Range Screen of the System func­tion allows the user to DEFINE the upper and lower limits of a
range AND the application of the range. The Range function
only allows the user to select or define the limits, or to select
the application, but not to define the application.

Normally the Model 6600 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.

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.

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.

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 UP/DOWN switch again to move the blinking to APPLICATION

and Enter.

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3 Operation Model 6600

Sel rng to set appl:
—> Ø1 Ø2 Ø3 <—

Use the UP/DOWN switch to increment/decrement the range number to

01, 02, 03, or CAL, and Enter.

Gas Name **********
FR:Ø TO:1Ø %

Use the UP/DOWN switch to increment the respective parameters as

desired, and Enter to move to the next. On the last field %/ppm Enter to accept

the values and return to range selection menu. (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.

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Oil in Water Analyzer Operation 3

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
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 Functions Screen—

1. Select ALGORITHM , and Enter.

2. Select and Enter SETUP.

3. Enter MANUAL from the Calibration Mode Select screen.

Dpt INPUT OUTPUT
Ø Ø.ØØ Ø.ØØ

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

be modified and the data-point number cannot. Use the UP/DOWN key to

modufy the input field, then Enter to modify the output field, Enter again to move
to the next data field.

After each point is entered, the data-point number increments to the next
point. Moving from the lowest to the highest concentration.

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, ESCAPE. The message, Completed. Wait for
calculation, appears briefly, and then the main 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,

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Part I 3-31

3 Operation Model 6600

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.

Before starting linearization, perform a standard calibration. See section

4.4. To enter data:

From the System Functions screen—

1. Select ALGORITHM , and Enter.

2. Select and Enter SETUP.

3. Enter AUTO from the Calibration Mode Select screen.

The Auto Linearize Mode data entry screen appears.

19.5 ppm SO2
Input(Ø) :20.00

5. Use the UP/DOWN switch to set the proper value of calibration

gas, and Enter. Repeat this step for each cal-point number as it
appears in the Input (x) parentheses.

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

lowest to the highest concentrations. Escape when done.

To end the session, send:

st<enter>
st<enter>

to the analyzer from the computer.

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Teledyne Analytical Instruments

Part I: Control Section Maintenance 4

Maintenance

Aside from normal cleaning and checking for leaks at the gas connec­tions, routine maintenance is limited to replacing filter elements and fuses,
and recalibration.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

4.1 Fuse Replacement

The 6600 requires two 5 x 20 mm, 4 A, T type (Slow Blow) fuses.
The fuses are located inside the main housing on the Electrical

Connector Panel, as shown in Figure 4-2. To replace a fuse:

1. Disconnect the Unit from its power source.

2. Place a small screwdriver in the notch in the fuse
holder cap, push in, and rotate 1/4 turn. The cap will
pop out a few millimeters. Pull out the fuse cap and
fuse, as shown in Figure 4-1

Teledyne Analytical Instruments

Part I: 4-1

4 Maintenance Model 6600 Oil in Water Analyzer

3.0 A MAX

Figure 4-1: Removing Fuse Block Cap and Fuse from Housing

2. Replace fuse by reversing process in step 1.

4. 2 System Self Diagnostic Test

1. Press the System button to enter the system mode.

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

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

The following failure codes apply:

Table 5-1: Self Test Failure Codes

Power

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

Analog

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

4-2: Part I

Teledyne Analytical Instruments

Part I: Control Section Maintenance 4

Preamp

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

>3 Call factory for information

Detector

0OK
1 Failed (open filament, short to ground, no

power.)

2 Unbalance (deterioration of filaments, blocked

tube)

4.3 Major Internal Components

All internal components are accessed by unbolting and swinging open
the front cover, as described earlier. The major internal component locations
are shown in Figure 4-2, the cell block is illustrated in Figure 3-2, and the
fuse receptacle is shown in Figure 3-3

The 6600 contains the following major internal components:

• Customer Interface PCB (Power Supply on bottom surface)

• Preamp PCB (Contains Microprocessor)

• Front Panel PCB (Contains 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.

For Optical/Detector Alignments, refer to parts II or III of this manual

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Part I: 4-3

4 Maintenance Model 6600 Oil in Water Analyzer

Side View Open Door

Figure 4-2: Control Section Major Internal Components

To swing open the cover panel, remove all screws.

WARNING: HAZARDOUS VOLTAGES EXIST ON CERTAIN

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

4-4: Part I

Teledyne Analytical Instruments

Part II: Analysis Unit

OPERATING INSTRUCTIONS

Model 6600

Oil in Water Analyzer

Part II: Analysis Section

of the Control/Analysis Unit

6600C - GP, Rack, Panel (Integral or Remote)

6600Z - GP, Bulkhead (Z-Purged in Div II areas)

(Integral or Remote)

6600X - (X-Proof, 1,1,B, C, D) (Integral or Remote)

Teledyne Analytical Instruments

Part II: i

Model 6600 Oil in Water 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 ....................................................... 1-5

1.4 Automatic Zero System.................................................. 1-6

1.5 System Description........................................................ 1-7

1.6 Photommeter ................................................................. 1-8

1.6.1 Source Module ........................................................ 1-8

1.6.2 Sample Cell............................................................. 1-9

1.6.3 Detector Module ...................................................... 1-9

1.7 Sample Systems............................................................ 1-10

2 Installation

2.1 Unpacking the Analyzer................................................. 2-1

2.2 Installing & Connecting the Analyzer ............................. 2-1

2.2.1 User Connections .................................................. 2-1

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

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.. 3-3

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 6600 Oil in Water Analyzer

iv: Part II

Teledyne Analytical Instruments

Oil in Water 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,
folded optics, 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 6600

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.

Shown with an Integral General Purpose Control and
Analysis Unit with external folded optical bench and
Sample Cell

1-2 Part II

Teledyne Analytical Instruments

Oil in Water Analyzer Operational Theory 1

Interconnection Diagram

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.

Teledyne Analytical Instruments

Part II: 1-3

1 Operational Theory Model 6600

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.

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

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Oil in Water Analyzer Operational Theory 1

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.
For oil in very clean water applications, the Zero fluid can be a hydrocarbon free
air or N2.

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 (for example, oil in water applications). 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 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 constructed for hazardouz area (Models
6600, 6600Z-divII or 6600X-div I) use and is mounted on a BACKPLATE, an
open rack, or in a closed cubicle.

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1 Operational Theory Model 6600

1.6 Photometer

The photometer modules are mounted on a BACKPLATE inside a
NEMA Enclosure (See D-71055). Facing the mounted photometer, the source
module is at the right top, the sample module is externally located in the folded
optics loop, and the detector module is on the right bottom. A source power
supply module is placed near the HG source module.

1.6.1 Source Module

Any one of three types of source modules may be used in your system.
For oil in water applications the Source module contains a HG source within
its ellipsoid reflector containing a lens and clamp to focus the lamp energy
through the folded optical train.

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.

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Oil in Water Analyzer Operational Theory 1

The HG (Mercury arc) source and its power supply reside in one
enclosure. A quartz lens focuses the energy into a beam for transmission. A
collecting lens is also used at the exit of the folded optical train to focus the source
energy on to the photodetector.

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.

1.6.2 Sample Cell

The sample cell rests external to the Control and Analysis electronics

placed between the source and detector modules.

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 Source module sub-assembly (See. D-

65306).

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.

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1 Operational Theory Model 6600

1.7 Sample Systems

Below is a typical sample systems that deliver to the sample fluid 6600
sample cell for Analysis. Depending on the mode of operation either
sample or calibration gas is delivered.

1-8 Part II

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Oil in Water Analyzer Part II: Analysis Unit

Installation

Installation of the Model 6600 Photometric Analyzer includes:

1. Unpacking

2. Mounting

3. Fluid 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 freezing nor
rise above 122°F (0-50°C).

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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2 Installation Model 6600

2.2.2 Electrical Power Connections

Unless specifically ordered, the standard 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 specific information. The electrical
power service must include a high-quality ground wire. A high-quality ground
wire is a wire that has zero potential difference when measured to the power line
neutral.

2.2.3 Compressed Air Supply

The system may require a supply of clean, oil and particulate free air to
drive pneumatically activated valves, create suction (pumping) eductor action
(demand more flow), or for use as zero fluids. In general, a 2 liter/minute supply
of compressed air between 80 to 120 psig is usually sufficient. The air supply
must have far greater capacity when purging of the system or when eductors
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 250 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. Choose a pump that can
also supply sufficient flowrates to meet anticipate flow response times based
upon sample delivery take-off distances, line sizes and pressure drops expected
to and from the analysis system.

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Oil in Water Analyzer Part II: Analysis Unit

2.2.7 Draining the System

In liquid analysis systems, the system return must terminate back to the
process or a safe area as the sample may be poisonous or corrosive. Olso, the
return pressure must be always sufficiently low enough from the inlet pressure
to maintain proper response times within the system.

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.

NOTE: Special designed systems may require checks under vacuum

or high pressure (consult manual addendum). Consult
commissioning start-up section in the manual addendum.

Warning: Do not operate the “ultrasonic homogenizer” in the

instrument for more than one (1) minute without a
liquid sample properly flowing through the homog­enizer.

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

operations:

1. Repeat the Self-Diagnostic Test, section 3.3.4, part I

2.4 Calibration

2.4.1 Calibration Fluids

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

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2 Installation Model 6600

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 60 to
80% 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.

2. Calibration with a span filter.

Method One:

1. Inject zero fluid and set zero as referred in Part I

2. Inject span fluid and set the concentration of the span fluid with
the span procedure referred in Part I

Method Two:

1. Determine the span setting using Method One.

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

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Oil in Water 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 lamp 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 (See Part 1).

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3 Maintenance Model 6600

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. (Some self-cleaning capability has been incorporated into
the inlet flow pattern (turbalent flowingsweep across cell windows) of the
sample cell design.

3.4 Suggested Preventive Maintenance
Schedule

DAILY (these suggestions are perinent to your particular system

design)

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.

MONTHLY

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

2. Calibrate the system. (Check manually the Zero and Span using

prepared Zero/Span fluids obtained from startup or previous calibration prac­tices).

ANNUALLY

1. Check the electronics calibration.

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Oil in Water 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)

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, or section 3.6
in this chapter.

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.

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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.

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Oil in Water 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 zero fluid in the cell.
(Collect a Zero prepared fluid from the sample system ifor all oil in water
analyzers). See Part III, Section 5.5

The procedure is purely mechanical and consists of adjusting the amount
of light passing through either the measuring or reference filter, never both.
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.

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.

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3 Maintenance Model 6600

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 low a gain
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.

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.

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Oil in Water 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 bottom of the interface PCB on the Control/Analysis Unit, are
three terminal strips where wiring is distributed to other sections of the
Model 6600 System. Such as AC power for the D2 lamp power supply, DC
Power to the preamplifier, High DC voltage for the photodetector, and

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3 Maintenance Model 6600

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.

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 6600 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.
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.

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Oil in Water Analyzer Maintenance 3

+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.

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3-10 Part II

Teledyne Analytical Instruments

Part III: Oil in Water

OPERATING INSTRUCTIONS

Model 6600

Oil in Water

Sample Conditioning

System Operation

Part III: Sample System

X-Proof

Part Number D-

6600 - GP, Rack, Panel (Integral or Remote)

6600Z - GP, Bulkhead (Z-Purged in Div II areas)

(Integral or Remote)

6600X - (X-Proof, 1,1,B, C, D) (Integral or Remote)

Teledyne Analytical Instruments

Part III: i

Model 6620 Oil in Water Analyzer

Table of Contents

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

2.0 The Method of Analysis ................................................. 1-2

2.1 The Optical Bench ......................................................... 1-2

2.2 The Photometer Amlifier ................................................ 1-2

2.3 The Automatic Zero System........................................... 1-4

2.4 Piping Schematic - B71046-0 ........................................ 1-4

2.5 Zero Correction for Clean Background Stream .............. 1-6

2.6 Zero Correction for High Background Stream ................ 1-7

3.0 System Description........................................................ 1-8

3.1 Photommeter ................................................................. 1-9

3.1.1 Source Module ........................................................ 1-9

3.1.2 Sample Cell............................................................. 1-9

3.1.3 Detector Module ...................................................... 1-9

3.1.4 Control Unit.............................................................. 1-10

3.3 Electrical Connections ................................................... 1-11

3.4 The Sampling System.................................................... 1-11

3.4.1 Sample Water Preconditioning System.................. 1-11

3.4.2 Zero Water Preconditioning System....................... 1-13

3.4.3 The Automatic Sample Cell Cleaning System....... 1-14

3.5 The Signal Outputs ........................................................ 1-16

3.6 Recorder Requirements................................................. 1-16

3.7 The Process Alarm System............................................ 1-17

3.8 The Amplifier PCB ......................................................... 1-17

3.8.1 Auto Zero Circuit.................................................... 1-17

3.8.2 Signal Failure Alarm .............................................. 1-18

4.0 Installation...................................................................... 1-19

4.1 User Connections .......................................................... 1-19

4.1.1 Electrical Power Connections................................ 1-20

4.1.2 Compressed Air Supply......................................... 1-20

4.1.3 Sample Connections ............................................. 1-20

4.1.4 Signal & Alarm Output Connections ...................... 1-20

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Part III: Oil in Water

4.1.5 Sample Delivery System........................................ 1-20

4.1.6 Safe Vent (Drainage).............................................. 1-21

5.0 System Start-up/Calibration........................................... 1-22

5.1 Installation Check .......................................................... 1-22

5.2 Electronics Check.......................................................... 1-22

5.3 Electrical Check............................................................. 1-22

5.4 Sample Delivery Check ................................................. 1-23

5.5 Preparation for Calibration............................................. 1-23

5.5.1 Required Calibration Equipment ........................... 1-24

5.5.2 Acquisition of Representative Oil Sample.............. 1-25

5.5.3 Acquisition of Representative Sample Water ............ 1-25

5.5.4 Oscilloscope Display of the I to E Converter Output .. 1-25

5.5.5 Backgrou nd Signa l Level D etermin ation ............... 1-26

5.5.6 Balancing of the Optics for Equal Light Transmission with

Zero Fluid in the Sample Cell................................. 1-27

5.6 Calibration Fluid Preparation......................................... 1-29

5.6.1 Zero Fluid Preparation ............................................ 1-29

5.6.2 Span Fluid Preparation .......................................... 1-29

5.6.3 Calibration ............................................................. 1-30

5.6.4 Calibration by Correlation with Laboratory Analysis1-32

5.6.5 Calibration of Homogenizer ................................... 1-33

5.7 System Set-Up for Automatic Operation......................... 1-35

5.7.1 Set-Up for Automatic Sampling................................ 1-35

5.7.2 Electronics Set-Up for Automatic Operation.............. 1-35

6.0 Automatic Operation and Routine Operational Duties ... 1-36

6.1 System Visual Check and Response Procedure ........... 1-36

6.2 Routine Maintenance..................................................... 1-36

6.3 Suggested Preventive Maintenance Schedule .............. 1-37

7.0 Service Procedures and Adjustments............................ 1-38

7.1 Set-Up of the Signal Processing Front End Amplifier..... 1-39

7.2 Set-Up of the I to E Converter ........................................ 1-39

7.3 Set-Up of the Logarithmic Amplifier ............................... 1-40

7.4 The Inverting Amplifier................................................... 1-40

7.5 The Integrated Reference and Measuring Signals......... 1-41

7.6 Sample Cell Maintenance .............................................. 1-41

7.7 Sample System Maintenance ........................................ 1-42

7.8 Zero Filter Replacement ................................................ 1-42

7.9 316SS Zero Filter Cleaning Procedure......................... 1-43

7.10 Lamp Replacement........................................................ 1-44

Teledyne Analytical Instruments

Part III: iii

Model 6620 Oil in Water Analyzer

7.11 Phototube Replacement ................................................ 1-44

8.0 Troubleshooting ............................................................. 1-45

8.1 The Lamp Refuses to Light ............................................ 1-45

8.2 Water Delivery Problems ............................................... 1-45

8.2.1 The Water Refuses to Flow Through the Tubing........ 1-45

8.2.2 Sample Pump Failure.............................................. 1-46

8.3 Zero Drift Problems........................................................ 1-46

iv: Part III

Teledyne Analytical Instruments

Oil in Water Part III

1.0 Introduction

The Teledyne Oil-in-Water Analyzer utilizes the ultraviolet (UV) absorp­tion principle to detect and continuously measure oil concentration in water. The
analyzer consists of two integrated systems: (1) a single external sample cell,
chopped beam, dual-wavelength UV process photometer and associated con­trol analysis unit and electronics, and (2) a sample system that delivers to the
photometer a sample which represents the true oil content of the stream being
analyzed, or a “zero” fluid of oil-free sample delivered to the photometer at a
preset interval once each hour. This oil-free sample is used to reset the zero
reference point on the recorder.

NOTE: Previously, to differentiate between oil and other organic compounds,
oil was formally defined as any material in the sample stream that could be
extracted by carbon tetrachloride, chloroform, hexane, or petroleum ether.
We now know, however, that our oil in water analysis system correlates
exceptionally well to EPA and marine testing methods based upon a more
realistic definition pertinent to how our system works. That is, the definition
of what is truly oil in water from fossil fuel sources is what can be coarse
filtered (non-dissolved oils) and what can be ultra fine filtered (dissolved oils)
from the process water sample. The above definition is a result of a one year
continuous field evaluation by the EPA during the early 80’s which specified
that the Teledyne oil in water system showed good correlation with results
obtained by EPA method 413.1 (superceded in February 1999, by method
1664A using hexane). The field tests were conducted at primary and
secondary effluent sampling points at a refinery. The investigation determined
calibration curves for process oil versus EPA reference oils and validation of
the calibration and sample measurement process against EPA method 413.1
“oil and grease total recoverable.” The report and evaluation was conducted
by the Environmental monitoring and support laboratory, at EPA Cincinnati,
Ohio. The Teledyne Oil-in-Water Analyzer is designed to operate effectively
within the parameters established by this newer accepted definition of oil.

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Part III Model 6600

Analytical accuracy of the equipment is better than 2% when it has been
calibrated with an oil identical to that being measured. Reproducibility of
analysis equals or exceeds that of any known laboratory or analytical method.
When calibrated in a range of 0-10 ppm, changes as little as 0.1 ppm are detected
(1% sensitivity).

2. 0 The Method of Analysis

The following description follows the course of an optical beam, emitted
from a source lamp in the SOURCE MODULE, passed through the sample to
be analyzed in the SAMPLE CELL, and received (through optical filters),
converted to pulses of electrical energy, and further conditioned, in the
DETECTOR MODULE. The result is separate pulses which are compared in
the control/analysis unit to reveal the measurable difference between optical
absorption of the sample at a selected wavelength (determined by the
MEASURING optical filter) and a zero-absorption condition (set by the
REFERENCE optical filter). The magnitude of that difference represents the
concentration of the component of interest in the sample.

2. 1 The Optical Bench

Energy from a Mercury Line lamp, used as a source, is optically focused
through a folded path 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 which 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 in accordance with its composition.

The analyzer monitors two of the wavelengths: a measuring wavelength
selected where the components of interest has a characteristic spectral peek
absorbance, and a reference wavelength (where oil does not absorb) utilized to
provide stability by detecting extraneous phenomena such as turbidity, cell
window deposits, unequal optical component aging, etc. The reference wave­length is also sometimes selected at a point where automatic compensation is
attained for interference from other sample components.

2. 2 The Photometer Amplifier

The photo detector converts the photo energy impinging on it to electrical
energy. The magnitude of the photo energy pulses which strike the detector is
related to absorbance by the sample and the properties of the optical filters.

1-2 Part III

Teledyne Analytical Instruments

Oil in Water Part III

The detector output, which is a sequence of pulses which 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
of the energy in the measuring and reference pulse is exponentially related 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 can be
adjusted to obtain any desired output level.

To obtain electrical signals which 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 which 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. The output of the subtractor is a
DC voltage linearly related to the concentration of the component of interest.

From this point on the signal progresses to the A to D converter, where the
signal is digitized for micro controller. The micro controller performs operation
on the signal such as spanning, zeroing, triggering alarms, etc..

The technique of
for such phenomena as turbidity, sediment, algae, cell window coatings,
component aging and other extraneous electro-optical attenuation.

dual wavelength spectroscopy provides compensation

Teledyne Analytical Instruments

Part III: 1-3

Part III Model 6600

The procedure to set up the optical bench, the signal processing front-end
amplifiers, the standardization of outputs, and alarm systems are described in
separate sections for each access.

2. 3 The Automatic Zero System

The sample may contain chemicals which are not oil, but absorb UV
energy at the measuring wavelength used for oil analysis, thereby interfering
with the oil analysis (their signals add to the oil signal, which is the only signal
of interest).

The automatic zero system is included to discriminate the two signals. It
involves an electronics circuit, which drives the signal developed by the
interfering, non-oil, background chemicals below zero on an hourly basis.

The electronics zero circuit works in conjunction with a specially designed
sample system.

The sample, which contains oil and background chemicals, is fed to the
sample return port, where it progresses to the various subsections for enhance­ment in order to present the sample to the measuring cell in such a way so as to
maintain the highest degree of accuracy for oil measurements.

2. 4 From B71046-0 (or customer’s) piping schematic

Each of these subsections with piping flow components are identified
with rectangular dotted lines to indicate their importance based upon a
particular oil measurement application.

For Example, there are 4 basic process sampling considerations:

1. Required use of a homogenizer/dearator and filter assemblies for high

oil range (>20ppm high background applications).

2. Required use of filter assemblies for low oil (<20ppm oil, high

background).

3. Required use of back-flush solenoids for low oil range, very low

background applications

4. Required use of a pump assembly for low pressure (<10 psig) or no

gravity feed applications).

In general, but not without exceptions, the following applications could
involve items 1 through 4 above or combinations thereof.A. 0-20ppm oil
down to 0-10ppm oil in very clean waters such as steam condensates, cool­ing waters, clear sea waters: (3 and 4, if no sample pressure or gravity feed

available).

Note: Assume sample inlet contains dissolved oil and is homogeneous.

1-4 Part III

Teledyne Analytical Instruments

Oil in Water Part III

B. 0-20ppm down to 0-10ppm oil ranges in high background

waters such as off-shore platforms, produced waters, sea water, wastewater,
effluents, ponds, bilge/deballasting treatments, on-board ship applications: (2
and 4, if no sample pressure or continuous gravity feed available. (Note:
Assume sample inlet contains dissolved oil and is homogeneous).

C. 0-50ppm to 0-200ppm oil in high background waters such as
off-shore platforms, produced waters, sea water, wastewater, effluents, ponds,
bilge/deballasting treatments, on-board ship applications, tank farms, fuel
depots, rig-washing decks, etc., (1, 2 and 4 if no sample pressures or gravity
feed available). NOTE: for ranges higher than 200ppm oil a dilution system is
required.

Note: Assume sample inlet contains both dissolved and non-dissolved
oil with non-oil organic background compositions and is representative. It
should also be uniform and kept homogeneous up to the homogenization
step.

NOTE: By adjusting valve, V4 in a position for “F1 only”, filtering
versus “F1, F2” and F3 filtering during the auto-zero functioning selects
whether the customer wishes to measure “Total oil and grease recoverable”
or “non-dissolved oil” only. This becomes advantageous when environmen­tal regulation agencies allow tolerable dissolved oil level compositions in the
waters. Many times, cost savings are realized in clean-up operations.

Oil in Water Piping Diagram (B71046)

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Part III: 1-5

Part III Model 6600

Should Teledyne receive no representative sample of water or oil for
testing purposes, Teledyne will not be held responsible for the unsatisfactory
functioning of the analyzer due to sample related nonconformities. If the end
user is unable to provide samples, a spectral scan or a detailed description of the
type(s) of oil(s) present is prefferred. The user is responsible for proper
calibration of the unit, at commissioning stage, against the oil(s) found in the
sample fluid to be analyzed. TAI assumes that the sample background is clear
of strong U.V. absorbers at 254nm, i.e., no aromatic hydrocarbons other than oil
and grease listed and NO Fe+3 or H

S are present. Maximum turbidity allowed

2

is 1 NTU per 10 ppm oil range up to a maximum range of 0-50 ppm oil (20NTU/
200ppm). When no samples are supplied, TAI will ship unit calibrated with ppm
EPA#2 oil in tap water. In some cases, particularly for very high ranges, a
surfactant such as glycol (non-absorbing, non-interfering) is added to the water
sample which increases the miscibility for the oil to go into solution.

The automatic zero cycle is initiated by a signal from the Model 6600
microprocessor based timer circuit. The timing cycle is 1 hour. The timing cycle
can be modified through the system menu, refer to chapter 3 of the control unit
part of this manual. The zero cycle lasts for about 5 minutes and the sample cycle
lasts about 55 minutes.

The sequential switching from sample to zero is operated by the 6600
control unit, where the zero reading of the output is automatically, hourly
upgraded by the auto zero circuit.

2.5 ZERO CORRECTION FOR CLEAN BACKGROUND
STREAMS (REFERENCE B71441 PIPING)

1. The activation of all solenoid valves in the sample system are performed

by the 6600 timer circuit.

2. Backflush solenoids (sv1, sv2) around the sample cell are used to prepare

a reproducible autozero. These solenoids allow oil free air or nitrogen
(N2), (80-120 psig, 5.62-8.44kg/cm2 g) supply is required to purge out
the cell in reverse flow fashion. This action completely cleans the cell
windows and drys them to a stable reproducible background for the
autozero functioning. Because the process is very clean without impuri­ties the autozeroing primariy corrects for lamp, detector and particulate
(dirt) accumulation that may occur on the cell windows.

3. When the span filter with its solenoid is selected/programmed and used

1-6 Part III

Teledyne Analytical Instruments

Oil in Water Part III

for correcting any gain in the system, its introduction commences at this
time after the zero has been accomplished. The duration to the calibration
of the auto zero is about 10-15 secs longer. This is considered a full auto­cal updated function where both zero and span are updated each hour.
The air/N2 backflush causes a great disturbance in the detector preampli­fiers. The recorder when used and the ppm oil reading on the control unit
digitial display, however, will not notice it due to the hold action of the
sample and hold circuitry (if the analyzer is configured to “hold” and not

track, as mentioned in section 3.39, part I).

2.6 ZERO CORRECTION FOR HIGH BACKGROUND
STREAMS (REFERENCE B71046-0 PIPING) OR CUS­TOMER SPECIFIC PIPING)

1. When the stream contains high background impurities, these must be
cancelled out in the autozeroing each hour due to their possible normal
variances in the process stream. In this case we are measuring “total oil
and grease recoverable” and any non-oil organic background hydrocar­bons must be corrected for on a continuous basis. In this way, the filter
assemblies are used wherein the filter labeled (F1, 3 micron) eliminates
the non-dissolved oil in the process steam; while filter(s) labeled (F2, 0.2
to 1 micron) and (F3, 0.2 micron teflon element filter) eliminates over
98% of the dissolved oil species. When only the F1 filter is selected by
V4 (in the up position), the autozeroing will cancel out the dissolved oil
left in the process sample; thereby allowing one to measure only the non­dissolved oil (This becomes important for some users who are allowed
low levels of dissolved oil in their process stream). For “total oil and
grease recoverable” the V4 3-way valve is selected (in the down positon)
to choose both F1, F2 and F3 filter assemblies thereby autozeroing for all
oil and grease applications. In this way, the non-oil organic background
is cancelled out on a hourly basis.

During the normal measuring function, sv3 is normally opened allowing
the sample to enter the analysis sample cell for oil analysis. When an
autozero timing signal occurs, sv3 is activated and diverts the process
through the filter assembly(s) to correct the background anomolies
usually on a hourly basis.
(NOTE: During calibration practices, a grab sample of the zero process
fluid is obtained here at the Grab zero/Sample Cal Drain Collection.
Valves, V6 and V7 are carefully opened (Caution:Be aware of any
high pressure that may be in the sample) to collect a suitable zero

Teledyne Analytical Instruments

Part III: 1-7

Part III Model 6600

sample (selected for total oil or non-dissolved oil applications based upon
valve V4 position).

The zero water may be supplied to the measuring cell by the existing process
available pressure, by a user gravity feed system or by a pump (user supplied
at the take-off) or by TAI either remotely at the takeoff source or within the
analyzer sampling system. Normal measuring mode flowrates (commonly
are 100-1000 liter/minute) will render response times of under 10 seconds
typically for 90% FSD (this does not include any lag-time associated by the
fast loop in the system). Each system may be slightly different depending
upon components used (see B71046 piping), but generally the system is
quite fast and many times can be tailored to meet fast response requirements.

The 6600 timer will now activate the auto zero circuit and correct the meter
and recorder to read the zero level previously set to the true absolute zero for
the process fluid.

If the output of the subtractor remains as it was on the preceding zero cycle,
then no correction of the auto zero circuit is required. This means that no
background change has occurred during the past hour.

When the output of the subtractor is other than the previous zero cycle
value, the Auto Zero circuit would compensate for the difference, resulting in
zero volts at its output. This zero voltage, applied to the input of the Sample and
Hold/Buffer circuitry.

The 6600 then (optionally) can insert a manual or automatic employed span
flag that simulates an upscale reproducible calibration analyte of interest.

This function adds another 10-20 seconds to the zero/span check/correc­tion.

After auto zero/span is taken
following consequences:

1. The sample is delivered to the sample cell for the next 55 min. The
instrument has returned to the sample cycle and the analyzer monitors
the sample for oil.

all solenoid valves are de-energized with the

3. 0 System Description

The oil-in-water analyzer is generally constructed as either an explosion-proof
6600Z or X Purge or general-purpose (Model 6600) unit, open rack or closed
cubicle mounted. An equipment panel is used to support the analyzer components.

1-8 Part III

Teledyne Analytical Instruments

Oil in Water Part III

All sample-filtering (fluid) components are located on the same side of the
equipment panel as the electrical components.

3.1 Photometer

The photometer control/analysis unit module is mounted on a back panel.
Modules for General Purpose; I, II, B, C & D; and I, I, B, C & D are avail­able and mounted within sheet metal Nema enclosures as well as Nema
stainless enclosures depending upon customer preference for the intended
environmental areas. These enclosures are either Z-purged or X-purged to
meet hazardous area classifications. In some cases, Teledyne has supplied
non-purged, Division II Oil in Water systems self-certified to FM standard
3600 for non-incendive equipment and ISA S12.12-1994 standard for the
same type equipment (Class I, Div II, B, C, D).

3.1.1 Source Module

The source module contains a mercury-line lamp (the source of UV
energy) located within a parabolic reflector which captures most of the emitted
lamp output energy. A quartz lens is used to focus the energy into a beam for
transmission through the optical path and sample cell before reaching the
detector (PMT).

WARNING:

The lamp is installed within a parabolic reflector. It emits strong UV
radiation. When the module is opened with the lamp on, UNDER NO
CIRCUMSTANCES SHOULD THE OPERATOR VIEW THE LAMP
DIRECTLY OR BE ALLOWED TO OPERATE THE UNIT UNLESS
PERSONNEL IN THE IMMEDIATE VICINITY ARE PROTECTED WITH
SUITABLE UV ABSORBING EYEGLASSES.

3.1.2 Sample Cell

All systems, the Aluminum/CPVC sample cell couples the source and
detector modules together along a folded optical train of the photometer. The
sample cell includes double windows (inner sapphire, outer Quartz), at either
end, to prevent condensate from forming in the optical path.

Teledyne Analytical Instruments

Part III: 1-9

Part III Model 6600

3.1.3 Detector Module

The detector module contains the phototube detector, chopper assembly,
and the first four stages of the electronics circuitry. The synchronized chopper
motor rotates at 1800 rpm.

The filter wheel which carries the optical filters is marked with an “M” for
measuring and an “R” for reference filter. A reference mark on the filter wheel
must be aligned with a reference mark on the shaft in case the filter wheel is
removed from its shaft. Another reference mark is inscribed on the switch plate
and motor mount for the same reason. The detector printed circuit board holds
the I to E Converter stage, second amplifier, logarithmic amplifier and inverter.

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.

3.1.4 Control/Analysis Unit

The control/analysis unit contains the majority of the electronics em­ployed by the analyzer as well as operator controls. There are four PCB
assemblies. Three of them are located on the door: the Display PCB, The
Main PCB, and the Amplifier PCB. The Interface PCB is located on the
backplate assembly.

The Interface PCB: This large board is where the customer intercon­nects output signals, Alarm signals, unit receives its AC power, and holds
the DC power supply for the electronics (+5, +/-15 VDC), as well as the
phototube DC power supply to generate -250 VDC. Valve control signals
are interconnected to this board too.

The Amplifier PCB: This board receives the DC voltage signals of the
Measurement and Reference coming from the detector amplifier. The differ­ence of these signals is amplified on this board. Any electronic zeroing
action occurs on this board too. This board mounts on headers that are
available only for that purpose on the Main PCB.

1-10 Part III

Teledyne Analytical Instruments