Keller Castello Specifications

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Page 1

Content MeasureMent systeM

86 mm

53 mm

Ø 21 mm

60 mm

7 mm

12mm

6kt – SW 17

USIT-Ring

G1/4’’

Ø 21 mm

10500

KELLER

98 mm

64 mm

Air-Pressure On-Button

Ø 9,2 mm / Ø 8,6 mm

for ventilated or pressurised tanks

Castello offers a user-friendly way to re present the pressure measurement at the bottom of a tank as the quantity of remaining liquid. At the push of a button, the micro -controller performs the calculations using the information of the tank shape and dimen sions and displays the remaining tank content quantity on the clearly legible 5-digit LED display in the desired unit (litres, gallons etc.).

The unit is congured using a PC and the easy-to-use software so that the lling level, which determines the pressure, can be converted into an appropriate lling quantity. First the tank shape is selected, then the tank dimensions and the specic gravity of the liquid are entered. It

contains the most current tank shapes. The program covers the most common tank shapes, but

also enables any shape by entering the parameters into a specied table.

The exclusive use of absolute pressure sensors in the Castello system eliminates the use of capillary vented cables with all the problems associated with a gauge pressure measurement. The Castello housing integrates an air pressure sensor, ranged between 0,8 bar and 1,2 bar absolute. The sensors to measure the hydrostatic pressure at the bottom of the tank are calibrated from 0,8 to 1,8 bar abs for tanks up to 5 m in height, and 0,8 to 2,3 bar abs for tanks up to 10 m in height. The pressure difference, calculated by the static pressure.

The content of a pressurised tank is determined using the difference between the measurements from two absolute pressure sensors located at the top and bottom of the tank.

The overall accuracy of the system of 2 mbar is achieved using a computerised calibration

and compensation procedure for the pressure sensors. The coefcients for this calculation are stored in EEPROMs in the sensors. These are retrieved by the micro processor at each mea-

surement and employed within the equations to calculate the pressure values. The Castello housing and hydrostatic sensor can be interchanged at will.

It is also possible to connect a standard 3-wire transmitter or high-precision digital transmitter

(Series 36 X) that can be congured to an accuracy of 0,02 %FS over a range of 0 to 50 °C, a

true representation of which is displayed by the Castello.

The power supply to the system (8 to 28 V) can be provided externally or internally using a 9 V battery. The display is obtained by pressing the button on the front, and the value appears

for a congurable duration. The Castello has two switch outputs with congurable functiona lity

and threshold values. An external power supply must be provided if the switch outputs are used.

micro -controller

, is the relative hydro-

Castello

CA1

Series 23 Q

Series 26 Q

Indication of switching outputs (LED)

Bottom View

Drill holes for mounting

KELLER AG für Druckmesstechnik CH-8404 Winterthur

+41 52 235 25 25 info@keller-druck.com

Binder male socket 8 pole / Serie 723

Pin connection

1: +S1 (Relayoutput) 2: -S1 (Relayoutput) 3: +S2 (Relayoutput)

4: + VCC (8…28 VDC)

5: RS 485 A 6: -S2 (Relayoutput) 7: RS 485 B

8: GND

34 mm

Side View

Optional: second transmitter

Diaphragm’s position

20 mm

36 mm

KELLER Ges. für Druckmesstechnik mbH

DE-79798 Jestetten

+49 7745 9214 0 eurocenter@keller-druck.com

Mounting Options

Ø 4,8 mm

KELLER America

Newport News, Virginia

1 877 253 5537 sales@kelleramerica.com

Series 26 Q

10500

KELLER

/ / / / / / / / / / / / / / / / / / / / / / /

Series 23 Q

Edition 04/2018

Subject to alterations Companies approved to ISO 9001

www.keller-druck.com

Page 2

Installation

There are two holes in the housing for mounting the unit. To install the sensor, unscrew and remove the cover of the unit, lead the cables through

the PG screw connections and attach the wires to the screw terminals. The Castello is programmed via the connector on the side, which is also the location of the external power supply and switch output connections. Provided that the cover and the cable leadthrough are securely tightened, the extremely robust housing is watertight in compliance with IP65.

Castello Ordering Information

Castello basic unit + KELLER standard transmitter series 23 Q (with thread) or series 26 Q (for lling level) + converter K-107 (serial) or K-104B (USB) for conguration incl. adapter (5-pin --> 8-pin) or conguration in accordance with customer specications

Specications for Castello

Measuring / Pressure Ranges 5 m tank level (10 m standard cable): Range 0,8…1,8 bar abs. 10 m tank level (15 m standard cable): Range 0,8…2,3 bar abs.

Supply External: 8…28 V Internal: 9 V battery

Switch outputs 2 pcs. PhotoMOS-Relais 40 V / 0,4 A

Battery Life

4’000 Measurements (display 10 seconds on) 6’000 Measurements (display 5 seconds on) Interface RS485

Air Pressure Probe Level Probe Temperature Range -20…+70 °C 0…50 °C

Accuracy (Error Band) max. 0,5 mbar

2 mbar (1,8 bar range) 3 mbar (2,3 bar range)

Indicator 5 digits – 14 mm high 7 segments LED

Resolution Min. 2’000 Points Indicator Material Aluminium Level Probe Material Stainless Steel AISI 316L

Cable Type Hytrel, 4,60 mm Ø

Probe Protection IP 68 Indicator Protection IP 65

Probe Certication II 1 G EEx ia IIC T6

LCIE 02 ATEX 6124 X

Indicator Certication In Progress

Overpressure 2 x Nominal Range

Conguration PC-Software

The software to congure Castello can be downloaded from our website or ordered on CD for a handling charge. Castello can be connected to the PC via KELLER converter cable K-107 or K-104B with adapter. Castello can be congured for standard or EEPROM transmitters.

The software contains the pressure/content curves of the featured tanks.

The dimensions of the tank of a certain shape and the specic gravity of the

liquid is entered and the measurement unit for the display chosen.

The software also foresees the application for free standing water towers, where the distance of the tank to the position of the transducer can be chosen.

Options (extra charge):

–

Face plate with various measuring units and customer’s logo

– Other housing colours (default: grey)

– Carrying case

– Factory conguration: foil strip on rear con-

taining all application-related details

– Wireless transmission via ARC-1