Endress+Hauser OUM980 User manual

P/N 71105623 Rev 1
BA930C/07/en/10.09
Operating Instructions
Model OUM980 Photometric Analyzer/
Model OUSAF21 Dual Beam Inline
Low Level Color Sensor
Analyzer/Sensor to measure Spectral Absorbance

Model OUM980 with OUSAF21 Inline Sensor
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Model OUM980 with OUSAF21 Inline Sensor
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Table of Contents
1. SAFETY INSTRUCTIONS........................................................................................................................................... 5
1.1 DESIGNATED USE ................................................................................................................................................................5
1.2 INSTALLATION,START-UP AND OPERATION .............................................................................................................................5
1.3 OPERATIONAL SAFETY ..........................................................................................................................................................5
1.4 RETURN .............................................................................................................................................................................6
2. GENERAL INFORMATION ....................................................................................................................................... 7
2.1 HOW THE MODEL 980 PHOTOMETRIC ANALYZER WORKS .........................................................................................................7
2.2 CONCENTRATION AND ABSORBANCE UNITS.............................................................................................................................7
2.3 EASY INTERFACING ..............................................................................................................................................................7
3. INSTALLATION......................................................................................................................................................... 9
3.1 MODEL OUM980 ANALYZER INSTALLATION...........................................................................................................................9
3.2 MODEL OUM980 CABLES AND WIRING ..............................................................................................................................10
3.3 DC INPUT POWER OPTION .................................................................................................................................................11
3.4 MODEL OUSAF21 SENSOR INSTALLATION............................................................................................................................12
3.5 CABLE OUK20 STRUCTURE AND TERMINATION OF MEASUREMENT CABLE.................................................................................13
3.6 POST-CONNECTION CHECK ................................................................................................................................................14
4. OPERATION ............................................................................................................................................................ 15
4.1 QUICK OPERATION GUIDE ..................................................................................................................................................15
4.2 DISPLAY AND OPERATING ELEMENTS ....................................................................................................................................15
4.2.1 Operating Elements................................................................................................................................................15
4.2.2 Operation Legend...................................................................................................................................................16
4.3 LOCAL OPERATION ............................................................................................................................................................16
4.3.1 Measuring Mode ....................................................................................................................................................16
4.3.2 Configuration Mode ...............................................................................................................................................18
4.4 REMOTE OPERATION..........................................................................................................................................................19
5. COMMISSIONING .................................................................................................................................................. 20
5.1 FUNCTION CHECK .............................................................................................................................................................20
5.2 SWITCHING ON.................................................................................................................................................................20
5.3 ANALYZER CONFIGURATION AND OPERATION ........................................................................................................................21
5.3.1 Factory Default Setting ...........................................................................................................................................22
5.3.2 Sensor Calibration ..................................................................................................................................................22
5.3.2.1 Liquid Calibration Procedure..............................................................................................................................22
5.3.2.2 Filter calibration Set up and Calibration ..............................................................................................................24
5.3.3 Change Pathlength Setting......................................................................................................................................26
5.3.4 Setup Output Span .................................................................................................................................................27
5.3.5 Output Relay Set Point and Configuration...............................................................................................................28
5.3.6 Current Output Calibration ....................................................................................................................................30
5.3.7 Date and Time Setting............................................................................................................................................30
5.3.8 Configuration and Use of Digital Inputs...................................................................................................................31
5.3.9 Process Control ......................................................................................................................................................31
5.3.9.1 Access of Process Control...................................................................................................................................31
5.3.9.2 Baseline (AutoZero)............................................................................................................................................32
5.3.9.3 Optical Zero.......................................................................................................................................................32
5.3.9.4 Lamp Switch......................................................................................................................................................33
5.3.9.5 Optical Check ....................................................................................................................................................33
5.3.9.6 Password Protection...........................................................................................................................................33

Model OUM980 with OUSAF21 Inline Sensor
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5.3.9.7 Process Value Correlation...................................................................................................................................34
6. MAINTENANCE ...................................................................................................................................................... 37
6.1 MAINTENANCE OUTLINE ....................................................................................................................................................37
6.2 OUSAF21 MEASUREMENT DETECTOR/FILTER REPLACEMENT .................................................................................................40
6.3 SENSOR WAVELENGTH CHANGE ..........................................................................................................................................40
6.4 SENSOR WINDOW AND GASKET REPLACEMENT ......................................................................................................................41
7. REPLACEMENT PARTS LIST .................................................................................................................................. 42
7.1 MODEL 980 PHOTOMETRIC ANALYZER.................................................................................................................................42
7.2 MODEL OUSAF21 INLINE SENSOR ......................................................................................................................................42
8. TECHNICAL INFORMATION ................................................................................................................................. 43
8.1 PHOTOMETRIC ANALYZER OUM980....................................................................................................................................43
8.1.1 Input......................................................................................................................................................................43
8.1.2 Output...................................................................................................................................................................43
8.1.3 Power Supply.........................................................................................................................................................43
8.1.4 Performance...........................................................................................................................................................44
8.1.5 Environment ..........................................................................................................................................................44
8.1.6 Mechanical Construction........................................................................................................................................44
8.2 ABSORBANCE SENSOR OUSAF21.........................................................................................................................................45
8.2.1 Sensor Dimensions .................................................................................................................................................45
8.2.2 Input and Output ...................................................................................................................................................45
8.2.3 Mechanic Construction ..........................................................................................................................................45
8.2.4 Environment ..........................................................................................................................................................46
8.2.5 Power Supply.........................................................................................................................................................46
8.2.6 Optical Specifications..............................................................................................................................................46
9. ORDERING INFORMATION ................................................................................................................................... 47
9.1 COLOR ANALYZER OUM980 ..............................................................................................................................................47
9.2 SENSOR OUSAF21............................................................................................................................................................48
9.3 OUK20 CABLE SET ...........................................................................................................................................................49

Model OUM980 with OUSAF21 Inline Sensor Safety Instructions
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1. Safety Instructions
1.1 Designated Use
Integra Model OUM980 is an analyzer for determining the absorbance of a liquid medium at a specific wavelength
The analyzer is particularly suited for use in the following areas:
Bio-Technology industry
Waste water processing
Chemical processing industry
Food industry
Pharmaceutical industry
Any other use than the one described here compromises the safety of persons and the entire measuring system and is, therefore,
not permitted. The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Installation, Start-Up and Operation
Please note the following items:
Installation, electrical connection, start-up, operation and maintenance of the measuring system must only be carried out
by trained technical personnel. The technical personnel must be authorized for the specified activities by the system
operator.
Technical personnel must have read and understood these Operating Instructions and must adhere to them.
Before commissioning the entire measuring point, check all the connections for correctness. Ensure that electrical cables
and hose connections are not damaged.
Do not operate damaged products and secure them against unintentional commissioning. Mark the damaged product as
being defective.
Measuring point faults may only be rectified by authorized and specially trained personnel.
If faults can not be rectified, the products must be taken out of service and secured against unintentional commissioning.
Repairs not described in these Operating Instructions may only be carried out at the manufacturers or by the service
organization.
1.3 Operational Safety
Relevant regulations and standards have been met. As the user, you are responsible for complying with the following safety
conditions:
Installation instructions
Local prevailing standards and regulations.
EMC
This instrument has been tested for electromagnetic compatibility in industrial use according to applicable standards.
Protection against interference as specified above is valid only for an instrument connected according to the instructions in these
Operating Instructions.

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1.4 Return
If the device requires repair, please contact your local sales and service representative. Refer to the website on the back page of this
manual on where to find your local sales and service support office. Please use the original packaging, if possible.
Notes on safety icons and symbols
Safety icons
Warning!
This symbol alerts you to hazards. They can cause serious damage to the instrument or to persons if ignored.
Caution!
This symbol alerts you to possible faults which could arise from incorrect operation. They could cause damage
to the instrument if ignored.
Note!
This symbol indicates important items of information.
Electrical symbols
Direct Current (DC)
A terminal at which DC is applied or through which DC flows.
Alternating Current (AC)
A terminal at which (sine-form) AC is applied or through which AC flows.
Ground connecting
A terminal is already grounded using a grounding system.
Protective earth terminal
A terminal which must be grounded before other connections may be set up.
Alarm relay
Input
Output

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2. General Information
The Model OUM980 Photometric Analyzer is used in conjunction with a Model OUSAF21 sensor to measure the spectral
absorbance of process liquid in the VIS/NIR region of the electromagnetic spectrum.
Dependent upon the optical pathlength of the connected sensor, the instrument can measure up to 50 Optical Density (OD) units.
The Model OUM980 Photometric Analyzer is manufactured from state of the art digital electronics. Plant interface is through quick
disconnect screw terminals on the back of the module. The user interface is comprised of a 6-button tactile feel keypad and 4 x 20
character alphanumeric LCD display.
2.1 How the Model 980 Photometric Analyzer Works
The Model OUSAF21 sensor generates two photocurrent (nA) detector signals based upon the amount of energy present at its lamp
source (reference) and measurement point internally. The Model OUM980 unit computes the logarithmic ratio of these two signals
and determines the absorbance of the liquid passing through the sensor. The absorbance value is expressed in optical density units
(OD) and is displayed on the front panel. Two galvanic isolated analog current outputs, proportional to the OD reading, are
simultaneously transmitted for connection to other instrumentation and recording devices.
2.2 Concentration and Absorbance Units
The concentration of an optically absorbing material in a mixture can be determined since it is related to the amount of light
absorbed from a beam of light passing through it. The absorbance of a substance is directly proportional to the concentration of the
material that causes the absorption. The Lambert-Beer Law describes this relationship of absorbance (A) to concentration.
Essentially, the amount of radiation transmitted through the absorbing material decreases logarithmically with its increasing
concentration.
Where Ir
Io
T
Alog
1
log  and Io
Ir
T
The above assumes that the optical pathlength remains constant. The optical density (OD) however, is defined as Absorption per
unit length. Normalizing to an optical pathlength of 1cm, it follows that:
)(
1A
L
OD
Where OD = Optical Density
A = Absorbance
L = pathlength in cm
2.3 Easy Interfacing
The Model OUM980 Photometric Analyzer incorporates a front panel display and two analog current output signals. The display on
the front panel is an alphanumeric 4 x 20 character LCD. The display may be configured for process variable or analog current
output measurements. Optical Density (OD) readings are normalized to a 1cm pathlength.

Model OUM980 with OUSAF21 Inline Sensor General Information
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There are two analog current outputs from the unit. The range of each can be independently set to be any range within the
measurement range of the instrument. One output is configured to operate with measurement baseline shift commands, while the
other tracks full scale of the instrument.
The analog current outputs (4-20mA) will operate with loads up to 750 ohms. These outputs are galvanically isolated and conform
to NAMURiStandard.
Model OUM980 is supplied as standard with four digital inputs and three digital output relays.
The digital inputs can be configured to perform a variety of functions such as baseline and sensor lamp off/on.
The outputs can be connected to a PLC for inclusion in a control scheme, for simple valve operation or for local indication (alarms)
and annunciation. Alarm status indication is provided on the front panel display.
All digital inputs are optically isolated.
iNAMUR standard limit detection when enabled is set to a BAD if the signal level is above 21 mA or below 3.6 mA for more than 4 seconds. The BAD status is cleared
when the signal returns to the normal 4-20 mA range.

Model OUM980 with OUSAF21 Inline Sensor Installation
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3. Installation
3.1 Model OUM980 Analyzer Installation
Before starting installation, inspect the analyzer, sensor, and supplied cable set for any signs of shipping damage. Report any visual
damage or discrepancies to the factory and the shipper immediately.
The Model OUM980 analyzer is a ¼ DIN enclosure which can be installed a variety of panel, wall and bench top housings. Refer
to figure 3.1 for mounting dimensions. Mount or install the analyzer into an enclosure or area that is not subject to excessive
vibration or shock and will protect the instrument from materials such as water and chemicals. Allow enough clearance behind it
for cable access.
Figure 3.1: OUM980 Analyzer Mounting

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3.2 Model OUM980 Cables and Wiring
All wiring terminals are located on the back panel of the Model OUM980. The analyzer/sensor interconnection cables supplied
with the system have all been pre-terminated and labeled for ease of installation. The Model OUM980 has two (2) analog current
outputs of 4 to 20mA. Both are capable of driving loads up to 750 ohms.
In addition to the analog outputs, three (3) galvanic isolated digital outputs (N.O.) are available. These outputs are rated for both
AC and DC voltages up to 280 volts at 125mA. These outputs are intended for dry contact or pilot applications.
1
2
3
4
5
6
7
8
9
10
11
12
Connector
Phoenix Cambion
Insert Terminal
Here
Wire Pin
Terminal
Figure 3.2: Wire Terminal Preparations
Cables installed for signal connection (i.e. analog outputs, lamp fail output) should be shielded twisted pairs.
Warning!
When routing the cables, separate signal cables from power wiring!
Caution!
Use dry contact only when connect digital input to analyzer!
Refer Figure 3.3 for wiring connection.

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Figure 3.3: Model OUM980/OUSAF21 Dual Beam Wiring Diagram (AC Input Version)
3.3 DC Input Power Option
For instruments supplied for 24VDC operation, only the power input connection is changed. Figure 3.3 shows the connection
detail for a 24VDC unit.
Input Power
+24VDC
DC RTN
Ground
24 VDC
Figure 3.4: Integra DC Power Connection

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3.4 Model OUSAF21 Sensor Installation
Figure 3.5: Recommended Orientation for Sensor Installation
Sensors can be installed either directly in a process line or in a by-pass line. They can be mounted either horizontally or at an angle.
If mounted horizontally, the sensor lamp and detector housings must be horizontal. This will insure that the optical window
surfaces are in a vertical position, which will help prevent build up on the window surfaces. The sensor should be located upstream
of pressure regulators. Operating sensors under pressure will help to avoid the possibility of air or gas bubble evolution, which can
cause measurement noise and error.
When installing, allow adequate space for the connection of cables at the ends of the lamp and detector housings. Access to these
areas is also important for connection/disconnection purposes. Sensor bodies should be supported when in line and care should be
taken to ensure they are protected against damage caused by external forces such as carts on adjacent walkways.

Model OUM980 with OUSAF21 Inline Sensor Installation
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Figure 3.6: Typical OUSAF21 Sensor With Cables Connected.
3.5 Cable OUK20 Structure and Termination of Measurement Cable
Figure 3.7: OUSAF21 Cable at Lamp Side

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Figure 3.8: OUSAF21 Cable at Detector Side
3.6 Post-Connection Check
After wiring up the electrical connection, carry out the following checks:
Device Status and Specifications Remark
Is the analyzer or the cable externally damaged? Visual inspection
Electrical connection Remarks Remark
Are the installed cables strain-relieved?
No loops or cross-overs in the cable run?
Are the signal cables correctly connected according to the wiring
diagram?
Are all screw terminals tightened?
Are all cable entries installed, tightened and sealed?
Are the PE distributor rails grounded (if present)? Grounding at place
of installation
Grounding at place of installation
Caution!
Improperly grounding will lead to unreliable measurement result!

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4. Operation
4.1 Quick Operation Guide
User has the following ways of operating the analyzer:
On site via the keypad
Via the digital input interface to perform process control functions remotely.
4.2 Display and Operating Elements
4.2.1 Operating Elements
Figure 4.1: Operating Controls
1. LED for lamp warning functions and limit relay status.
2. Menu/ESC key serves two functions. Pressing Menu/ESC will always exit out of a screen and will not save any changes
Entered. Pressing Menu/ESC from the main PVii or Output screen will open the Sub-Menu screen.
3. Ack/ENT key accepts changes in a screen and continue forward through the screen
4. 4 keys navigate the user through the menus and screens.
5. LC display for displaying the measured values and configuration data LED.
ii PV is the Process Value for PV1 and PV2 and corresponds to Output 1 and Output 2 respectively.

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4.2.2 Operation Legend
In this manual, the following operation legend will be used when describing operation procedure.
Enter/Acknowledge key
Escape/Menu key
Left or Right key
Up or Down key
Figure 4.2: Operation Legend for Operation Instruction
4.3 Local Operation
4.3.1 Measuring Mode
The analyzer normally operates in measuring mode. Here, the relays and alarm LED are triggered by the analyzer according to
process status. The analyzer will take configurable digital input to trigger certain function like BaseLine Zeroiii, Optical Zeroiv etc...
iii BaseLine Zero when enabled offsets the PV to zero. This often used to subtract background absorbance prior to initiating a process.
iv Optical Zero is established during calibration and the set with a non-absorbing liquid in the flow cell, i.e. de-ionized water.
During the measuring mode, the LCD screen will display as figure 4.3. The process value, unit and analyzer label will be displayed
permanently. BaseLine, Alarm and Lamp Status will be display when conditions are met.
Figure 4.3: LCD display on measuring mode

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Table 4.1 shows the status display description and display condition.
Status Area Name Displayed symbol Description and Display criteria
Analyzer Label “xxxxxxxxxxxx” Editable up to 12 characters for user
analyzer identification.
“OD” Display “OD” under normal condition,Process Unit
“xxxxxx” Displays user configured engineering unit
if PV correlation function is activated.
Over Range Symbol “OVER” Displays if measurable range is reached.
“BL OFF” Displays if BaseLine is not activated.
“BL ON” Displays if BaseLine function is activated.
BaseLine Status
“BL SFT” Displays if BaseLine and BaseLine Shift
function are both activated.
Alarm “AL x” Displays if corresponding relays (1, 2, or
both) are triggered.
“LAMP LOW” Flash if reference voltage is lower than
80% of initial value.
“LAMP FAIL” Displays if lamp reference signal is lost.
Lamp Status
“LAMP OFF” Displays if lamp is turned off.
Cable Status “CABLE FAULT” Displays if lamp or signal cable has a faulty
connection.
Table 4.1: Operation screen under measuring mode
Figure 4.4: Operations under Measuring Mode
Under measuring mode, press button will let you enter the process control screen, where user can operate process
control routine. The detail of process control function will be listed in Chapter 6.

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4.3.2 Configuration Mode
The configuration and calibration functions are arranged as function groups.
Use key to enter the function group menu from measurement screen.
Use arrow key to select the group from process set-up, maintenance, or system data.
Use to confirm the change and input the value.
If a modified setting is confirmed with , the old setting is retained.
Ack
ENT
Ack
ENT
Ack
ENT
Menu
ESC
Menu
ESC
Menu
ESC
Figure 4.5: Diagram of configuration structure
Input data
During the system configuration and set up procedure, user will need to input the data into the screen.
In the data input screen
Use to move the cursor to select the digit to edit.
To change the decimal point of the input data, place the cursor on decimal point, use to move the decimal
point to the left or right.
Figure 4.6: Decimal Point Position Placement

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4.4 Remote Operation
Remote operation function will provide user the ability to use off site dry contact to perform the process control. Short input
channel pin to COMMON pin will trigger the input the channel.
Refer section 5.3.8 to configure and use digital input function for remote control.
Digital Input # Description and Display criteria
1 Lamp On/Off
2 Enable BaseLine function
3 Update BaseLine value
Optical Zero4
Hold current process measurement
(both display and analog output)
Table 4.2: Digital Input Functions
19
11
12
13
14
15
16
17
18
1
COM
2+
2-
1-
1+
4
3
2
Dry Contact or
Panel Switch
Channel 1 & 2
Analog Outputs
(4-20 Ma)
Figure 4.7: Typical Digital Input Wiring Diagram

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5. Commissioning
5.1 Function Check
Warning!
Check all connections for correctness.
Make sure that the supply voltage is identical to the voltage written on the technical information!
5.2 Switching On
Familiarize yourself with the operation of the analyzer before it is first switched on. Please refer in particular to the "Safety
Instructions" and "Operation" sections. After power-up, the device performs a diagnosis for 30 seconds and then goes to the
measuring mode.
Lamp Initial Set-Up
If the analyzer is first time switched on with a new lamp, a “LAMP LOW” symbol will be shown on the display screen. And the
frond LED will be flashing and lamp alarm relay will be toggled. To remove this warning message, the lamp status has to be
initialized from the software. The lamp low warning shows as follow
Figure 5.1: Lamp status during start-up