DS1225

DS1225 TTELEC | Alldatasheet

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Platon Vampire - Electronic Indicator DS1225 © TT Electronics plc Issue B 7/2017 Page 1 TT Electronics | Roxspur Measurement & Control Ltd

2 Downgate Drive, Sheffield, S4 8BT, England |Ph: +44(0)114 244 2521

www.roxspur.com | sales@roxspur.com General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. Features:  4-20mA transmitter  Intrinsically safe approval  Liquid or gas flow calibration  Built-in flow totalizer  Operator adjustable high and low alarms  1% accuracy  VA meter reliability  Program setting password protection PLATON TYPE GMTX The GMTX electronic indicator with microprocessor enhanced performance and LCD panel display of flow rate and total, designed for use with a metal tube variable area flowmeter for liquid, gas or steam measurement. Suitable for use with body options, the VAMPIRE (Variable Area Micro Processor Indicator Readout Electronics) has a totally solid state measurement system, eliminating mechanical hysteresis errors. Microprocessor interpolation between flow data points, stored in factory calibrated look-up tables, gives an improvement to±1% accuracy for this technique. The loop powered 4-20mA transmitter is certified intrinsically safe to CENELEC standards, for use in a potentially hazardous area. Both loop powered and AC mains powered units have separate high and low flow alarm outputs. OPERATING PRINCIPLE The VAMPIRE is a metal tube variable area flowmeter; as the flow up through the precision machined tapered tube increases, the float rises, reaching an equilibrium position. Electron beam welded within the float casing is a magnet. Two “Hall effect” magnetic field sensors measure both the vertical and horizontal components on this field. The angle of the magnetic field defines the position of the float in the tapered tube. This solid state measurement eliminates the problems of mechanical hysteresis associated with conventional magnetic pointers. Field angle is also independent of the absolute value of magnet strength, and sensor sensitivity.

Platon Vampire - Electronic Indicator DS1225 © TT Electronics plc Issue B 7/2017 Page 2 TT Electronics | Roxspur Measurement & Control Ltd www.roxspur.com | sales@roxspur.com General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. SPECIFICATION Temperature Housing Glands Earth Stud GMTXA GMTXD Display Calibration Analogue output Resolution Alarm output Totalizer Approvals Zener Barriers GMTXD: 50˚C GMTXA: 70˚C Polyester coated aluminum. Weatherproof to IP65 4 off suitable for 2-5mm cable. External M6 stud fitted. 85-265V, 50-60Hz, 0-2A max - current consumption 24Vdc loop powered (12V min, 30V max) LCD 0-100% analogue scale 90mm long. Digital Display, 4/5 digits 10mm high. Selectable for Flow Rate or Total. ±1% FSD GMTXA: 20mA into 600Ω max. GMTXD: 4-20mA, 2 wire transmitter. 0.5% on current output, 80mA GMTXA: 2 x 8A SPCO relays @ 230V ac max 100mA, max switched 30V, Internal Impedance 100Ω. GMTXD: 2 x open collector transistors. Display 1-19,999. Pulse output selectable in- stead of flow alarm output. 50msec pulse length. Max pulse rate 2/sec (GMTXD). GMTXD is intrinsically safe approved to CENELEC EExia IIBT4. CRN (Contact Sales for details). EMC Directive 2004/108/EC 28V, 300W for 20mA line. 10V, 50W for alarm signals. The measurements are compared with a look-up table of field and flow data, stored in the VAMPIRE micro processor memory on factory flow rig calibration. Flow rate is deduced accurately by interpolation between data points. The micro processor converts the flow rate to correct engineering units for the digital display on the LCD, adjusts the display meter pointer and 4-20mA output, sets the alarm status and incre- ments the totalizer as necessary. Keypads on the VAMPIRE front panel are used to set flow alarm levels, zero the totalizer and select the digital display as rate or total. Via a password entry procedure, the site engineer can reset the display units or even rescale the flowmeter to allow for changes to process conditions. This program also has selections to define what functions are accessible to the operator (without password), plus zero, span and time constant adjustments. FLOW RANGES Model Flow Digit Water (L/h) Air (m³/h) Max ΔP (mbar) GMTX 1 (15mm/1/2” Ø 250 Long) 160 2 250 7.5 30 3 400 12 20 4 600 18 35 GMTX2 (25mm/1” Ø 250 Long) GMTX3 (50mm/2” Ø 250 Long) GMTX4 (80mm/3” Ø 300 Long) GMTX5 (100mm/4” Ø 400 Long) 1000 1600 2500 4000 6000 10,000 100 120 200 360 180 300 600 1000 160 400 190 140 220 525 440

Platon Vampire - Electronic Indicator DS1225 © TT Electronics plc Issue B 7/2017 Page 3 TT Electronics | Roxspur Measurement & Control Ltd www.roxspur.com | sales@roxspur.com General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. Every effort has been made during the preparation of this document to ensure the accuracy of statements and specifications. However, we do not accept liability for damage, injury, loss or expense caused by errors or omissions made. We reserve the right to withdraw or amend products or documentation without notice. Head Office: 2 Downgate Drive, Sheffield, S4 8BT, England Tel: +44(0)114 244 2521 Fax: +44(0)114 243 4838 METAL TUBE FLOWMETER FAMILY VAMPIRE flow measurement electronics can be supplied with any of the Platon metal tube variable area flowmeters in the GMT family (see leaflet DS1221 Screwed and DS1220 Flanged). INSTALLATION 1. Ensure that no ferromagnetic material is situated within 100mm of the indicator. 2. Model GMTXA has output relays de-energized for alarm conditions. 3. Model GMTXD transistor outputs are “off” for alarm conditions. The negative line is common to the transistor outputs and the loop supply. 4. Intrinsically safe installations of Model GMTXD should be in accordance with BS EN60079-14. The 4-20mA loop should be protected by an approved standard 28 Volt 300W shunt diode safety barrier. If required, the alarm outputs should be connected via approved 10 Volt 50W safety barriers. 5. It is recommended that the VAMPIRE LCD display is protected from both extremes of freezing and direct sunlight. O4HWAR0410