Greenspan EC-2500A Operational manual
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CONTENTS
1 Introduction ................................................................................................................................. 3
2 Sensor Overview .......................................................................................................................... 6
3 Applications ................................................................................................................................. 8
4 Instrument Details ....................................................................................................................... 9
5 Sensor Wiring & Connec�ons ..................................................................................................... 12
6 Installation and Deployment ConsideraGons ............................................................................. 14
7 EC250 Specifications ................................................................................................................. 17
8 Contact Us ..................................................................................................................................18
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1 Introduction
1.1 System Description
1.2 CerGfication
•The instrument is visually inspected, marked and labelled.
•The complete sensor calibration record is archived for reference, and batch number
informa�on is kept on file for staDstical analysis.
•An individual Certificate of Conformance is issued to the customer.
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1.3 Unpacking and Inspection
1.4 Serial Number
MODEL EC250
RANGE 0 – xxxx μS NORM (S)
S/N 012345
1.5 Warranty Policy
12
months
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1.6 Factory Service & Repair
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2 Sensor Overview
2.1 Theory of Measurement
2.2 Toroidal Sensing Head
2.3 Temperature Sensor
2.4 Microprocessor Control Unit
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2.5 Supply Voltage
2.5.1 Calculating the Minimum Supply Voltage
Vs = 2 * (Sc * Cr * (Cl / 100)) + Vm
Sc =
Cr
Cl
Vm
Sc = ECfs + PTfs + Sqc
ECfs
PTfs =
Sqc
Sc
Vs
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3 Applications
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4 Instrument Details
4.1 Sensor Design
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47mm OD 316 SS or Acetal sensor body
containing microprocessor controlled electronics
Power and Data Cable
Toroidal Sensing Head Double O-ring sealing
Temperature Sensor Moulded cable entry
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4.1.1 Cable Details
4.1.2 Mechanical Specifications
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Cable Construction
1 –Vent Tube: Polyamide
(size ID x OD) 2.40 x 3.20 mm
2 – Aramid Fibre
3 - 12 x Conductors
7 x 0.20 mm Tinned Copper
SecĢon = 0.22mm2 AWG24
InsulaĢon: Polypropylene
(size) = 1.10 mm ± 0.05 mm
4 - Tape: Polyester
5 – Drain Wire: 7x0.20 TinCu
6- Tape: Polyester Aluminium
7 - Jacket: Polyurethane black,
(size OD) 8.05 mm ± 0.15
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4.2 Sensor Factory CalibraGon
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8-27VDC (+ ve Supply) red
Ground (-ve Supply) black
Signal Ground light green
Signal Output EC blue
Signal Output Temp brown
Sensor EC Output can be specied as either Raw
(non normalised) or Normalised EC.
5 Sensor Wiring & Connec�ons
5.1 Standard Connections
Figure 2: EC-2500A Sensor Connec�on
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5.1.1 Voltage Output Sensors
Voltage Output
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6 Installation and Deployment Considerations
6.1 Placement and Care of the Sensor
6.2 General Methods of InstallaGon
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6.3 Typical LocaGons
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6.4 Field Installation InstrucGons
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6.4.1 Option 1: Non Turbulent CondiDons
6.4.2 Option 2: High Turbulent Conditions
Under no circumstances must the sensor be installed such that it can collide with the sides of the
well, or other solid objects within the well. Sensor installation under these circumstances will lead
to sensor damage that will not be covered under our normal warranty conditions. In these cases
the sensor must be mounted into a cradle or s�lling well as per Option 2.
6.4.3 Other Considerations
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7 EC250 Specications
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