serinus 10 - acoem.com...benefits the serinus® range of analysers have been designed using our...

8
BENEFITS The Serinus ® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 40 years. The result, instruments that integrate seamlessly into continuous monitoring networks. • Reliable performance complemented with a two year warranty • Minimise time spent on site performing maintenance through superior remote instrument control, diagnostic viewing and calibration • Comprehensive data logging and remote viewing of over 200 operational parameters • Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP • Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys • Instant status indication via illuminated instrument status light buttons on the front panel • Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval • Latest firmware updates can easily be installed using the USB flash memory drive • Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the “ECOTECH Serinus ® Remote” Android App • Built-in digital display measuring values and having function of measuring values transferred to graphical trend display • Enhanced operator safety through the use of 12 VDC internal voltages • Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus ® range • Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy • AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range. Serinus ® 10 OZONE ANALYSER The Serinus ® 10 Ozone (O 3 ) analyser delivers precise and reliable performance at excellent value. It uses proven non- dispersive ultraviolet (UV) absorption technology to measure O 3 in ambient air (LDL < 0.5 ppb, range 0 to 20 ppm). APPROVALS • US EPA approval (EQOA–0809–187) • EN approval TÜV (936/21221977/C) • EN approval MCERTS (MC100165/07) • Australian Standard (AS 3580.6.1-2011) • Russian approval (56053-13) • French approval LSCQA • Ukraine approval (12/3/B/24/295-17)

Upload: others

Post on 03-Apr-2020

1 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

BENEFITSThe Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 40 years. The result, instruments that integrate seamlessly into continuous monitoring networks.

• Reliable performance complemented with a two year warranty• Minimise time spent on site performing maintenance through

superior remote instrument control, diagnostic viewing and calibration

• Comprehensive data logging and remote viewing of over 200 operational parameters

• Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP

• Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys

• Instant status indication via illuminated instrument status light buttons on the front panel

• Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval

• Latest firmware updates can easily be installed using the USB flash memory drive

• Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the “ECOTECH Serinus® Remote” Android App

• Built-in digital display measuring values and having function of measuring values transferred to graphical trend display

• Enhanced operator safety through the use of 12 VDC internal voltages

• Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus® range

• Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy

• AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range.

Serinus® 10OZONE ANALYSER

The Serinus® 10 Ozone (O3) analyser delivers precise and reliable performance at excellent value. It uses proven non-dispersive ultraviolet (UV) absorption technology to measure O3 in ambient air (LDL < 0.5 ppb, range 0 to 20 ppm).

APPROVALS • US EPA approval (EQOA–0809–187)• EN approval TÜV (936/21221977/C)• EN approval MCERTS (MC100165/07)• Australian Standard (AS 3580.6.1-2011)• Russian approval (56053-13)• French approval LSCQA• Ukraine approval (12/3/B/24/295-17)

Page 2: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

SPECIFICATIONS

Range: Concentration units: Noise:Lower detectable limit:Linearity:Precision:

Zero drift: Span drift:

Response time:STP reference:Sample flow rate:Temperature range:Power:Power consumption:

Dimensions: Rack Spacing: Weight:

COMMUNICATION• #1 RS232 port (supports all protocols*)• #2 RS232 port (supports all protocols* and multidrop)• USB port (Advanced protocol only)• Bluetooth (Advanced protocol only)• TCP/IP network port (optional, supports all protocols*).

*Available protocols: Modbus (RTU/TCP), Bayern Hessen, EC9800 or Advanced

COMMUNICATION ANALOG & DIGITAL I /O PORT • 3 x analog outputs (current or voltage), 12 bit resolution user

definable range (between two user specified points) Current range: 0 - 20 mA, 2 - 20 mA or 4 - 20 mA Voltage range: 0 - 5 V, 0 - 10 V (voltage offset of 0 V, 0.25 V or 0.5 V)

• 3 x analog inputs (scalable), 0 - 5 V, 16 bit resolution• 8 x logic level digital control inputs• 8 x open collector digital status outputs.

DATA LOGGING• 8 GB removable USB flash memory drive that stores the internal

data logger, event log, automatic/manual configuration backup and automatic/manual parameter list save

• Internal data logger (can log up to 12 of 200+ parameters)• Logger interval (1 second to 24 hours) • Storage capacity ~ 10 years (set to 1 minute interval).

OPTIONS & ACCESSORIES• TCP/IP Network Port• Dual Sample (particulate) Filter• High Pressure Zero (for direct cylinder calibration)• Internal Zero and Span (for instrument precision checks)• Internal DC Pump (long life, low power, minimal maintenance)• Metric Fitting Kit (to connect 6 mm tube to rear ports)• 19” Rack Mount Kit• External Pump (240 or 110 VAC)• Annual Maintenance Kit• Printed User Manual (a soft copy of the user manual is supplied

on the ECOTECH resources USB stick with each analyser).

0 - 20 ppm (autoranging)mg/m3, μg/ m3, ng/m3, ppm, ppb or ppt< 0.25 ppb< 0.5 ppb< 1 % of full scale0.5 ppb or 0.2 % of reading whichever is greater24 hours: < 0.3 ppb 7 days: < 0.3 ppb7 days: < 0.5 % of readingor < 0.3 ppb whichever is greater 30 seconds to 95 %0 °C, 20 °C, 25 °C at 101.3 kPa500 cc/min0 to 40 °C100 - 240 VAC, 50 - 60 Hz (autoranging)260 VA (max at start-up)150 VA (nominal)429 x 175 x 638 mm3.5 RU 17.2 kg

Specifications subject to change without notice. Images used are for illustrative purposes only. Ecotech & Serinus are trademarks or registered trademarks of ECOTECH Pty Ltd in the United States and/or other countries. © 2019 ECOTECH Pty Ltd. All Rights Reserved. 20190327

ECOTECH Pty Ltd (Global Head Office) 1492 Ferntree Gully Road Knoxfield VIC 3180 Melbourne Australia +61 3 9730 7800 [email protected] ecotech.com

FS 603790 OHS 603791

Calibration Valve Manifold

Ozone Scubber

Sample Filter Holder

Measurement Lamp

Measurement Cell

Detector Assembly

Optical Bench

Lamp Driver

Page 3: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

BENEFITSThe Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 40 years. The result, instruments that integrate seamlessly into continuous monitoring networks.

• Reliable performance complemented with a two year warranty• Minimise time spent on site performing maintenance through

superior remote instrument control, diagnostic viewing and calibration

• Comprehensive data logging and remote viewing of over 200 operational parameters

• Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP

• Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys

• Instant status indication via illuminated instrument status light buttons on the front panel

• Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval

• Latest firmware updates can easily be installed using the USB flash memory drive

• Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the “ECOTECH Serinus® Remote” Android App

• Built-in digital display measuring values and having function of measuring values transferred to graphical trend display

• Enhanced operator safety through the use of 12 VDC internal voltages

• Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus® range

• Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy

• AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range.

Serinus® 30CARBON MONOXIDE ANALYSER

The Serinus® 30 carbon monoxide (CO) analyser delivers precise and reliable performance at excellent value. It uses proven NDIR gas filter correlation technology to measure CO in ambient air (LDL < 40 ppb, range 0 to 200 ppm).

APPROVALS • US EPA approval (RFCA–0509–174)• EN approval TÜV (936/21221977/D)• EN approval MCERTS (MC100166/07)• Australian Standard (AS 3580.7.1-2011)• Russian approval (56262-14)• French approval LSCQA• Ukraine approval (12/3/B/24/295-17)• Chinese Pattern Approval (JJF1364-2012)

Page 4: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

SPECIFICATIONS

Range: Concentration units: Noise:

Lower detectable limit:Linearity:Precision:

Zero drift:

Span drift:

Response time:STP reference:Sample flow rate:Temperature range:Power:Power consumption:

Dimensions: Rack Spacing: Weight:

COMMUNICATION• #1 RS232 port (supports all protocols*)• #2 RS232 port (supports all protocols* and multidrop)• USB port (Advanced protocol only)• Bluetooth (Advanced protocol only)• TCP/IP network port (optional, supports all protocols*).

*Available protocols: Modbus (RTU/TCP), Bayern Hessen, EC9800 or Advanced

COMMUNICATION ANALOG & DIGITAL I /O PORT:

• 3 x analog outputs (current or voltage), 12 bit resolution user definable range (between two user specified points) Current range: 0 - 20 mA, 2 - 20 mA or 4 - 20 mA Voltage range: 0 - 5 V, 0 - 10 V (voltage offset of 0 V, 0.25 V or 0.5 V)

• 3 x analog inputs (scalable), 0 - 5 V, 16 bit resolution• 8 x logic level digital control inputs• 8 x open collector digital status outputs.

DATA LOGGING• 8 GB removable USB flash memory drive that stores the internal

data logger, event log, automatic/manual configuration backup and automatic/manual parameter list save

• Internal data logger (can log up to 12 of 200+ parameters)• Logger interval (1 second to 24 hours)• Storage capacity ~ 10 years (set to 1 minute interval).

OPTIONS & ACCESSORIES• TCP/IP Network Port• Dual Sample (particulate) Filter• High Pressure Span (for direct cylinder calibration)• High Pressure Zero (for direct cylinder calibration)• Internal DC Pump (long life, low power, minimal maintenance)• Integrated CO2 Sensor (range: 0 - 2000 ppm, accuracy: ± 2 %)• Metric Fitting Kit (to connect 6 mm tube to rear ports)• 19” Rack Mount Kit • External Pump (240 or 110 VAC)• Annual Maintenance Kit• Printed User Manual (a soft copy of the user manual is supplied

on the ECOTECH resources USB stick with each analyser).

0 to 200 ppm (autoranging)mg/m3, μg/m3, ng/m3, ppm, ppb or ppt< 0.02 ppm or 0.2 % of concentration reading whichever is greater< 0.04 ppm < 1 % of full scale (0 - 50 ppm) 0.1 ppm or 0.1 % of reading whichever is greater24 hours: < 0.1 ppm7 days: < 0.1 ppm 7 days: < 0.5 % of reading or 0.1 ppm whichever is greater 60 seconds to 95 %0 °C, 20 °C, 25 °C at 101.3 kPa1000 cc/min0 to 40 °C100 - 240 VAC, 50 - 60 Hz (autoranging)260 VA (max at start-up) 150 VA (nominal) 429 x 175 x 638 mm3.5 RU17.8 kg

Specifications subject to change without notice. Images used are for illustrative purposes only. Ecotech & Serinus are trademarks or registered trademarks of ECOTECH Pty Ltd in the United States and/or other countries. © 2019 ECOTECH Pty Ltd. All Rights Reserved. 20190822

ECOTECH Pty Ltd (Global Head Office) 1492 Ferntree Gully Road Knoxfield VIC 3180 Melbourne Australia +61 3 9730 7800 [email protected] ecotech.com

FS 603790 OHS 603791

Page 5: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

BENEFITSThe Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 40 years. The result, instruments that integrate seamlessly into continuous monitoring networks.

• Reliable performance complemented with a two year warranty• Minimise time spent on site performing maintenance through

superior remote instrument control, diagnostic viewing and calibration

• Comprehensive data logging and remote viewing of over 200 operational parameters

• Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP

• Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys

• Instant status indication via illuminated instrument status light buttons on the front panel

• Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval

• Latest firmware updates can easily be installed using the USB flash memory drive

• Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the “ECOTECH Serinus® Remote” Android App

• Built-in digital display measuring values and having function of measuring values transferred to graphical trend display

• Enhanced operator safety through the use of 12 VDC internal voltages

• Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus® range

• Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy

• AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range.

Serinus® 40OXIDES OF NITROGEN ANALYSER

The Serinus® 40 Oxides of Nitrogen (NOx) analyser delivers precise and reliable performance at excellent value. It uses proven chemiluminescence technology to measure NO, NO2 and NOx in ambient air (LDL < 0.4 ppb, range 0 to 20 ppm).

APPROVALS • US EPA approval (RFNA–0809–186)• EN approval TÜV (936/21221977/A)• EN approval MCERTS (MC100167/07)• Australian Standard (AS 3580.5.1-2011)• Russian approval (56263-14)• French approval LSCQA• Ukraine approval (12/3/B/24/295-17)• Chinese Pattern Approval (JJF1361-2012)

Page 6: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

SPECIFICATIONS

Range: Concentration units: Noise:Lower detectable limit:Linearity:Precision:

Zero drift:

Span drift:

Response time:STP reference:Sample flow rate:Temperature range:Power:Power consumption:

Dimensions: Rack Spacing: Weight:

COMMUNICATION• #1 RS232 port (supports all protocols*)• #2 RS232 port (supports all protocols* and multidrop)• USB port (Advanced protocol only)• Bluetooth (Advanced protocol only)• TCP/IP network port (optional, supports all protocols*).

*Available protocols: Modbus (RTU/TCP), Bayern Hessen, EC9800 or Advanced

COMMUNICATION ANALOG & DIGITAL I /O PORT: • 3 x analog outputs (current or voltage), 12 bit resolution user

definable range (between two user specified points) Current range: 0 - 20 mA, 2 - 20 mA or 4 - 20 mA Voltage range: 0 - 5 V, 0 - 10 V (voltage offset of 0 V, 0.25 V or 0.5 V)

• 3 x analog inputs (scalable), 0 - 5 V, 16 bit resolution• 8 x logic level digital control inputs• 8 x open collector digital status outputs.

DATA LOGGING• 8 GB removable USB flash memory drive that stores the internal

data logger, event log, automatic/manual configuration backup and automatic/manual parameter list save

• Internal data logger (can log up to 12 of 200+ parameters)• Logger interval (1 second to 24 hours)• Storage capacity ~ 10 years (set to 1 minute interval).

OPTIONS & ACCESSORIES• Internal Sample Dryer • TCP/IP Network Port• Dual Sample (particulate) Filter• High Pressure Span (for direct cylinder calibration)• High Pressure Zero (for direct cylinder calibration)• Test Lamp (for PMT diagnostics)• Metric Fitting Kit (to connect 6 mm tube to rear ports)• 19” Rack Mount Kit • External Pump (240 or 110 VAC)• External Charcoal Scrubber• Annual Maintenance Kit• Trace Level Option• High Level Option• Printed User Manual (a soft copy of the user manual is supplied on

the ECOTECH resources USB stick with each analyser).

0 to 20 ppm (autoranging) mg/m3, μg/m3, ng/m3, ppm, ppb or ppt< 0.2 ppb< 0.4 ppb± 1 % of full scale 0.4 ppb or 0.5 % of reading whichever is greater24 hours: < 0.5 ppb7 days: < 0.5 ppb 7 days: < 1 % of reading or 0.5 ppb whichever is greater15 seconds to 95 %0 °C, 20 °C, 25 °C at 101.3 kPa600 cc/min (total for 2 channels)0 to 40 °C100 - 240 VAC, 50 - 60 Hz (autoranging)265 VA (max at start-up) 190 VA (nominal) 429 x 175 x 638 mm3.5 RU21.9 kg

Specifications subject to change without notice. Images used are for illustrative purposes only. Ecotech & Serinus are trademarks or registered trademarks of ECOTECH Pty Ltd in the United States and/or other countries. © 2019 ECOTECH Pty Ltd. All Rights Reserved. 20190823

ECOTECH Pty Ltd (Global Head Office) 1492 Ferntree Gully Road Knoxfield VIC 3180 Melbourne Australia +61 3 9730 7800 [email protected] ecotech.com

FS 603790 OHS 603791

Page 7: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

BENEFITSThe Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 40 years. The result, instruments that integrate seamlessly into continuous monitoring networks.

• Reliable performance complemented with a two year warranty• Minimise time spent on site performing maintenance through

superior remote instrument control, diagnostic viewing and calibration

• Comprehensive data logging and remote viewing of over 200 operational parameters

• Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP

• Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys

• Instant status indication via illuminated instrument status light buttons on the front panel

• Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval

• Latest firmware updates can easily be installed using the USB flash memory drive

• Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the “ECOTECH Serinus® Remote” Android App

• Built-in digital display measuring values and having function of measuring values transferred to graphical trend display

• Enhanced operator safety through the use of 12 VDC internal voltages

• Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus® range

• Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy

• AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range.

Serinus® 50SULFUR DIOXIDE ANALYSER

The Serinus® 50 sulfur dioxide (SO2) analyser delivers precise and reliable performance at excellent value. It uses proven pulsed UV fluorescent radiation technology to measure SO2 in ambient air (LDL < 0.3 ppb, range 0 to 20 ppm).

APPROVALS • US EPA approval (EQSA–0809–188)• EN approval TÜV (936/21221977/B)• EN approval MCERTS (MC100168/08)• Australian Standard (AS 3580.4.1-2008)• Russian approval (56054-13)• French approval LSCQA• Ukraine approval (12/3/B/24/295-17)• Chinese Pattern Approval (JJF1523-2015)

Page 8: Serinus 10 - acoem.com...BENEFITS The Serinus® range of analysers have been designed using our experience and knowledge gained from operating large air quality monitoring networks

DATA LOGGING• 8 GB removable USB flash memory drive that stores the internal

data logger, event log, automatic/manual configuration backup and automatic/manual parameter list save

• Internal data logger (can log up to 12 of 200+ parameters)• Logger interval (1 second to 24 hours) • Storage capacity ~ 10 years (set to 1 minute interval).

OPTIONS & ACCESSORIES• TCP/IP Network Port• Dual Sample (particulate) Filter• High Pressure Span (for direct cylinder calibration)• High Pressure Zero (for direct cylinder calibration)• Test Lamp (for PMT diagnostics)• Internal DC Pump (long life, low power, minimal maintenance)• Metric Fitting Kit (to connect 6 mm tube to rear ports)• 19” Rack Mount Kit • External Pump (240 or 110 VAC)• Annual Maintenance Kit• Printed User Manual (a soft copy of the user manual is supplied on

the ECOTECH resources USB stick with each analyser).

SPECIFICATIONS

Ranges: Concentration units: Noise:Lower detectable limit:

Linearity:Precision:

Zero drift: Span drift:

Response time:STP reference:Sample flow rate:Temperature range:Operating power:Power consumption:

Dimensions: Rack Spacing: Weight:

COMMUNICATION• #1 RS232 port (supports all protocols*)• #2 RS232 port (supports all protocols* and multidrop)• USB port (Advanced protocol only)• Bluetooth (Advanced protocol only)• TCP/IP network port (optional, supports all protocols*).

*Available protocols: Modbus (RTU/TCP), Bayern Hessen, EC9800 or Advanced

COMMUNICATION ANALOG & DIGITAL I /O PORT:• 3 x analog outputs (current or voltage), 12 bit resolution user

definable range (between two user specified points) Current range: 0 - 20 mA, 2 - 20 mA or 4 - 20 mA Voltage range: 0 - 5 V, 0 - 10 V (voltage offset of 0 V, 0.25 V or 0.5 V)

• 3 x analog inputs (scalable), 0 - 5 V, 16 bit resolution• 8 x logic level digital control inputs• 8 x open collector digital status outputs.

0 - 20 ppm (autoranging)mg/m3, μg/m3, ng/m3, ppm, ppb or ppt< 0.15 ppb< 0.3 ppb or 0.2 % of concentration whichever is greater< 1 % of full scale0.5 ppb or 0.5 % of reading whichever is greater24 hours: < 0.5 ppb 7 days: < 0.5 ppb24 hours: < 0.5 % of reading or< 0.5 ppb whichever is greater60 seconds to 95 %0 °C, 20 °C, 25 °C at 101.3 kPa725 cc/min0 to 40 °C100 - 240 VAC, 50 - 60 Hz (autoranging)255 VA (max at start-up) 180 VA (nominal)429 x 175 x 638 mm3.5 RU18.1 kg

Specifications subject to change without notice. Images used are for illustrative purposes only. Ecotech & Serinus are trademarks or registered trademarks of ECOTECH Pty Ltd in the United States and/or other countries. © 2019 ECOTECH Pty Ltd. All Rights Reserved. 20190823

ECOTECH Pty Ltd (Global Head Office) 1492 Ferntree Gully Road Knoxfield VIC 3180 Melbourne Australia +61 3 9730 7800 [email protected] ecotech.com

FS 603790 OHS 603791

Measurement Cell

Calibration Valve Manifold

Zero Air Scrubber

Sample Filter Holder

Hydrocarbon Kicker

Lamp Driver

Reaction Cell