Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) Unique oxygen sensors – unrivalled reliable operation, long life and minimum maintenance Sensor life indicator – indicates sensor performance Second current output and Modbus™ communication – enables simultaneous retransmission of both dissolved oxygen and temperature Comprehensive diagnostics facility with in-built software protection – ensures security and confidence in operation Salinity and atmospheric pressure correction capability as standard – enhances the flexibility of application Water-Wash option – minimizes maintenance whilst maintaining performance IP66/NEMA4X – reliable operation in demanding environments English, French, German and Spanish software – simple, user-selection of display language A high specification dissolved oxygen analyzer offering advanced functionality, simple operation and reliability in harsh environments Data Sheet SS/4640_9

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 2 4640 Series Dissolved Oxygen Analyzer The ABB 4640 Series Dissolved Oxygen Analyzer comprises a transmitter and a sensing system to accurately and reliably measure and transmit the dissolved oxygen value in a range of water monitoring applications. The 4640 Series Analyzer offers high performance and advanced functionality in a compact, cost-effective package. It is rugged and reliable for safe operation in harsh environments, simple to install and use, and requires minimum maintenance. Sensor...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 3 Sensor Life Indicator Sensor Life Indicator This unique feature provides information on the sensor condition and enables maximum use of the sensor before replacement. Replacement is a simple operation that can be carried out in a few minutes. Water-Wash Option To prevent fouling of the oxygen sensor, clean water is forced through the system at user-configurable intervals. Maintenance periods can be extended significantly by using this feature, lowering the cost of ownership and optimizing...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 4 Specification Display Measured value 5-digit x 7-segment back-lit LCD Information 16-character, single line, dot matrix, back-lit LCD Ranges Programmable 0 to 200% saturation, 0 to 20mg/l Resolution 0.1% saturation, 0.01% ppm Accuracy ±1% saturation, 0.1% ppm Temperature compensation 0° to 40°C (32° to 104°F) automatic via Pt100 resistance Salinity correction Automatic over the range 0 to 40% parts per thousand Environmental Data Operating temperature limits –20° to 55°C (–4° to 130°F) Storage...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 5 Retransmission No. of retransmission signals One fully isolated, supplied as standard Second retransmission output optional Output current 0 to 10mA, 0 to 20mA or 4 to 20mA programmable Accuracy ±0.25% FSD or ±0.5% reading Resolution 0.1% at 10mA, 0.05% at 20mA Minimum range 0 to 3 ppm or 30% saturation Maximum range 0 to 20 ppm or 200% saturation Maximum load resistance 750Ù (20mA max.) Serial communication RS485 (optional extra) Mechanical Data Models 4640 & 4642 Wall-mount Protection IP66/NEMA4X...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 6 Sensing System Select the required model number from those shown below. Floating Ball System 9408-700/750/760 Specification Sensor type 8012-170 sensor capsule Response Typically 20s for 90% of a step-change of oxygen concentration at 20°C (68°F) Temperature compensation Automatic correction by means of an integral Pt100 resistance thermometer. Operating temperature 0 to 40°C (104°F) Operating pressure Atmosphere Minimum liquid velocity 30cm/s Accuracy ±0.2mg/l or ±2% saturation within ±10°C...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 7 Specifications Sensor type 8012-170 sensor capsule Response Typically 20s for 90% of a step change of oxygen concentration at 20°C (68°F) Temperature compensation Automatic correction by means of an integral Pt100 resistance thermometer Operating temperature 0 to 40°C (32° to 104°F) Operating pressure Atmospheric Minimum liquid velocity 30cm/s (11.8 in/s) Accuracy ±0.2mg/l or ±2% saturation within ±10°C (±5°F) of the calibration temperature in the range 0 to 35°C (32° to 95°F) Materials of...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 9 Electrical Connections Models 4640 and 4642 Wall-mount Versions Channel 1 Channel 2 Power Supply Retransmission Output Relay 1 Relay 2 Serial RS485 1 2 3 4 – – – – DO Sensor Temperature Compensator 5 6 7 – – – 1 2 3 4 5 6 (Optional) – – – – – – Rx+ Rx– Tx+ Tx– 0V + Retrans. output * 1 2 3 4 5 6 – – – – – – NC C NO NC C NO Relay 1 Relay 2 N L Neutral Line Earth Earth Stud Channel 1 Channel 2 Power Supply Retrans. Relay 1 Relay 2 Serial – – – Black Green Yellow Red – Blue – 1 2 3 4 5 6 7 1 2...

Dissolved Oxygen Analyzer Models 4640 & 4645 (incorporating Water Wash Versions 4642 & 4647) SS/4640_9 10 Models 4645 and 4647 Panel-mount Versions TBA TBB Positive Negative Normally Closed Common Normally Open Normally Closed Common Normally Open Neutral Live Relay 1 Relay 2 1 2 3 4 5 6 7 8 9 10 11 12 Mains supply Retransmission output 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 0V Rx– Rx+ Tx– Tx+ Yellow Green Black – Blue – Red 1 2 3 4 5 6 7 8 9 10 11 12 RS485 Serial Interface (Optional) Temperature Compensator DO Sensor – + 2nd retransmission output available when RS485...