Broadley Technologies 14 Manuale utente
• Wiring Diagram
Page 3-2
• Programming
the Display
Page 5-13
• Calibration
Chapter 6
• Troubleshooting
Chapter 7
QUICK GUIDE
Instruction
Manual
19 Thomas, Irvine, California 92618 USA
Call Toll-Free: 877.246.7900 (USA & Canada)
Phone: 949.452.1112 Fax: 949.452.1114
E-Mail: [email protected]
Model 14
Dissolved Oxygen
Transmitter
Model 14 Oxygen Analyzer
Table of Contents
i
Chapter 1 : Introduction ..........................................................................................................1-1
1.1 Introduction.............................................................................................................................1-1
1.2 Principles of Operation............................................................................................................1-1
1.3 Main Characteristics ................................................................................................................1-2
1.4 Technical Specifications...........................................................................................................1-2
1.5 Dimensions..............................................................................................................................1-4
Chapter 2 : Description of the Analyzer...................................................................................2-1
2.1 Transmitter ..............................................................................................................................2-1
2.1.1 Presentation of the Transmitter................................................................................2-1
2.1.2 Transmitter Schematic.............................................................................................2-2
2.2 Application Fields ....................................................................................................................2-3
2.3 Standard Mounting Options .....................................................................................................2-3
Chapter 3 : Installation of the Instrument ...............................................................................3-1
3.1 Unpacking................................................................................................................................3-1
3.2 Inspection................................................................................................................................3-1
3.3 Mounting .................................................................................................................................3-1
3.4 Location...................................................................................................................................3-1
3.5 Power Connection....................................................................................................................3-1
3.6 Transmitter Start-Up.................................................................................................................3-1
3.7 Adjusting the Display Contrast..................................................................................................3-1
3.8 Electrical Connections .............................................................................................................3-2
3.9 Terminal Descriptions..............................................................................................................3-3
3.10 Changing the Programming Language....................................................................................3-4
3.11 Changing the Power Supply Frequency...................................................................................3-5
Chapter 4 : Using the Instrument.............................................................................................4-1
4.1 Front Panel Keys ......................................................................................................................4-1
4.2 Displays 1 - 4...........................................................................................................................4-2
4.3 Description of the Function Keys..............................................................................................4-3
4.4 Icons........................................................................................................................................4-3
4.5 Enter or Modify a Value...........................................................................................................4-4
Chapter 5 : Programming the Analyzer....................................................................................5-1
5.1 Main Menu ..............................................................................................................................5-1
5.1.1 CALIBRATION Menu ................................................................................................5-2
5.1.2 MAINTENANCE Menu...............................................................................................5-3
5.1.3 PROGRAMMING Menu.............................................................................................5-3
5.1.3.1 MEASURE Menu.............................................................................................5-4
5.1.3.2 ALARMS Menu...............................................................................................5-5
5.1.3.3 mA OUTPUTS Menu ......................................................................................5-8
5.1.3.4 RS485 Menu ...............................................................................................5-10
Model 14 Oxygen Analyzer
Table of Contents
Chapter 5 : Programming the Analyzer (Continued) ...............................................................5-1
5.1.4 SERVICE Menu .....................................................................................................5-11
5.1.4.1 AVERAGE Menu.....................................................................................5-12
5.1.4.2 DISPLAY Menu .....................................................................................5-13
5.1.4.3 CODE Menu..........................................................................................5-14
5.1.4.4 SOFT VERSION Menu............................................................................5-15
5.1.4.5 DEFAULT VAL. Menu..............................................................................5-15
5.1.4.6 mA ADJUST Menu .................................................................................5-16
5.1.4.7 CONFIGURATION Menu.........................................................................5-16
Chapter 6 : Calibrating the Instrument ....................................................................................6-1
6.1 Calibrating the Temperature Sensor.........................................................................................6-1
6.1.1 Automatic Temperature Compensation ...................................................................6-2
6.1.2 Manual Temperature Compensation .......................................................................6-3
6.2 Calibrating the Measurement ...................................................................................................6-4
6.2.1 Slope Calibration in Air with an Electric Zero.........................................................6-4
6.2.2 Slope Calibration in Air with Chemical Zero...........................................................6-5
6.2.3 Slope Calibration in the Process with an Electric Zero ...........................................6-6
6.2.4 Slope Calibration in the Process with Chemical Zero..............................................6-7
Chapter 7 : Start-up and Troubleshooting................................................................................7-1
7.1 Start-up....................................................................................................................................7-1
7.1.1 Probe Connections .................................................................................................7-1
7.1.2 Main Power Supply Connection..............................................................................7-1
7.1.3 Starting the Analyzer...............................................................................................7-1
7.2 Functional Troubleshooting .....................................................................................................7-1
7.3 Troubleshooting the Electronics...............................................................................................7-3
Chapter 8: Error Messages.......................................................................................................8-1
Appendix 1 : Pressure Conversion Table..................................................................................A-1
Appendix 2 : Temperature Conversion Table ...........................................................................A-2
Appendix 3 : Default Values.....................................................................................................A-3
ii
(Continued)
Model 14 Oxygen Analyzer
Chapter1:
Introduction
1.1 Introduction
The Model 14 Dissolved Oxygen Analyzer is a single-
channel analyzer for the measurement of dissolved oxy-
gen in fermentation vessels and bioreactors, as well as
in municipal applications.
1.2 Principle of Operation
The measurement of dissolved oxygen is based on the
well-known Clark cell principle. An oxygen-permeable
membrane isolates the electrodes from the sample,
thus eliminating the need for sample conditioning.
Other reducible or oxidizable ions do not interfere,
because they cannot pass through the gas-permeable
membrane.
A constant voltage supply powers two electrodes, main-
taining each at a constant potential. A platinum work-
ing electrode (cathode) reduces the dissolved oxygen
to hydroxyl ions :
O2+ 2H2O + 4e-=4OH-
A large silver counter electrode (anode) provides the
oxidation reaction:
4Ag++ 4Cl-=4AgCl + 4e-
The reduction of oxygen is the current limiting reac-
tion, thus making the cell current linearly proportional
to the dissolved oxygen concentration.
Electrochemical reactions and diffusion rates are tem-
perature-sensitive. The measuring cell, therefore, is
equipped with a temperature sensor which allows an
automatic temperature compensation.
1-1
Model 14 Oxygen Analyzer
1.3 Main Characteristics
■ Range: 0 - 299.99% saturation; 0 - 29.99 ppm
■ Calibration in the air
■ Temperature compensation
■Programmable alarm levels, outputs on relays
■ 4-20 mA, 0-20 mA analog outputs
(standard)
■ Wall- , panel- and pipe mounting
1.4 Technical Specifications
Power Supply 90 – 265 VAC , 50/60 Hz, Self-adjusting
Power Consumption 25 VA
Connections Terminal blocks
Fuse 5x20 mm cartridge - T2AL - 250V ANALYSIS
Number of Inputs 1
Measuring Range 0 – 299.99% saturation
Accuracy ± 1% full scale
Reproducibility ± 0.1% of range
Response Time (90 %) 0 – 95% full scale, <45 seconds
Ambient Temperature -20 – 60 °C (-4 … 140°F)
Relative Humidity 10 – 90% TRANSMITTER
1-2
Electrical Characteristics
Analysis
Model 14 Oxygen Analyzer
Display Display in concentration units or % saturation
Display of the direct cell current in nA
Display of the sample temperature in °C/°F
Programming via menus
Units nA, ppm-mg/l, °C, °F, % saturation
Calibration Electrical zero, chemical zero, slope calibration in the
air, slope process calibration by comparison with a
laboratory measurement
Analog Outputs 2 x 0/4 - 20 mA isolated from input signal, 800 ohms
load maximum
- Measurement or temperature
- Mode : linear, bi-linear
- Accuracy : 0.1 mA Alarms - Number : 4
- Functions : alarm - system alarm - timer
- Hysteresis : 0 - 10%
- Delay : 0 - 999 seconds
- Breaking power : 250 VAC, 3A maximum
30 VDC, 0.5A maximum
Temperature Compensation Automatic in the range of 0 - 80 °C
RS485 (option) Speed : 300 - 9600 bauds
Insulation : galvanic
Station number : 32 maximum
Transmitter Protection IP 65 and NEMA 4X
Error Reports Cell current > 999 nA
Sample temperature > 80 °C
Ambient temperature > 80 °C
Slope calibration error
Zero calibration error (offset)
Immunity Against Electromagnetic Interferences EN 50082-2 and EN 50082-1
Electromagnetic Emission EN 50081-1 and EN 50081-2
Low Voltage Standard IEC61010-1 MATERIALS
Working Electrode Cathode : platinum
Counter Electrode Anode : silver
Membrane Holder PPS & silicone
Membrane PTFE
Transmitter Epoxy coated aluminum
Probe Body Stainless steel 316L MAI
NTE
NANCE
Cleaning Clean the instrument with a soft tissue.
DO NOT use any aggressive agent.
1-3
Transmitter
Electromagnetic Compatibility
Materials
Maintenanace
Model 14 Oxygen Analyzer
1.5 Dimensions
(Dimensions are in mm and inches)
1-4
Esc Enter
33.5 mm
24 mm 0.936"
1.319"
24 mm 0.945" 28 mm 1.102" 73mm2 Pg13 2 Pg112.874"
117 mm 4.606" 144 mm 5.669"
144 mm 5.669"
Model 14 Oxygen Analyzer
Chapter2:
Description of the Analyzer
2.1 Transmitter
2.1.1 Presentation of the Transmitter
2-1
The electronic unit amplifies the signal of the amperometric measuring cell and converts it into a direct digital
readout in ppm, mg/l or % saturation. The transmitter is comprised of the following items:
■Potentiostat which maintains the working electrode potential constant
■Amperometric measuring module
■Analog multiplexer
■Microprocessor unit
The analog multiplexer allows measurement inputs from the measuring cell, temperature sensor and internal
checkpoints. Furthermore, the microprocessor operates the relays, the RS485 interface (optional) and the ana-
log outputs.
The unit has an internal concentration auto-ranging feature and a microprocessor-operated calibration routine.
The output of the potentiostat is monitored for possible overdriving of the potentiostat-output stage. This condi-
tion can occur when the connections to the measuring cell are due to an inoperable electrode or a defective ref-
erence electrode.
Model 14 Oxygen Analyzer
2-2
2.1.2 Transmitter Schematic:
1 : Programmable potentiostat 6 : Auxiliary input
2 : Polarization voltage amplifier 7 : Multiplexer
3 : Reversing switch for a 2 or 3 electrode 8 : A/D converter
operation.
4 : Temperature measurement circuit 9 : Microprocessor
5 : Measurement circuit current amplifier
REFERENCE
ANODE
TEMP +
TEMP -
CATHODE
AUX
49
875
6
2
1
3
U
Panel mounting
Panel cut-out: 138 mm x 138 mm (5.4” x 5.4”)
Front panel dimensions: 144 mm x 144 mm (5.7” x 5.7”)
Included hardware: 2 flat head screws, 4 mm x 18 mm long, for panels up to 6 mm thick
Model 14 Oxygen Analyzer
2.2 Application Fields
Easy to use, install and program, this instrument is suitable for the following applications:
- Fermentation / biotech
- Municipal
2.3 Standard Mounting Options (using the red clamping bow)
The transmitter housing conforms to norm DIN 43700.
2-3
Wall mounting
Included hardware: 2 pan head screws, 4 mm x 60 mm long for red clamping bow (a)
Additional required hardware: 2 flat head screws, 4 mm x 60 mm long (b)
Placed 3.15 “ (80 mm) on center
80 mm (3.15")
8 mm (0.315”) max.
285 mm (11.22”) max.
(a)
(b)
Indice
