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Summary of Contents for WEBTEC 1 Series
- Page 1 Webtec Products Limited 1, 2 & 3 Series Portable Hydraulic Testers User Manual www.webtecproducts.com...
- Page 2 Introduction Webtec Portable Hydraulic Testers have been designed for easy connection to a hydraulic circuit so that flow, pressure and temperature can be readily checked. Testers can take full back pressure up to 210/420/480 bar (3000/6000/7000 psi) depending on the model, and the built- in loading valve enables many of the operating conditions to be simulated.
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Page 3: Principles Of Operation
Warning: Open the loading valve prior to testing Principles of Operation Flow meter The flow meter comprises an axial turbine mounted in the aluminium base block. The oil flow rotates the turbine and its speed is proportional to the oil velocity. The revolutions of the turbine are measured by means of a magnetic sensing head which feeds a pulse every time a turbine blade goes by to an electronic circuit. - Page 4 Select the desired test using the front panel controls (not applicable on 1 series) When low pressure testing is required, connect the optional low pressure gauge with automatic cut-out valve to the tester block.
- Page 5 Instructions for using the portable hydraulic test unit The tester is designed to measure pressure, flow, temperature and rpm* (* 2 series only). It can take full system pressure between 210 and 480 bar (3000 and 7000 psi) depending on the model.
- Page 6 DHT 1 Series Digital Hydraulic Tester Digital Pressure display gauge On/Off Battery switch cover G Digital display - Digital display for flow and temperature. Automatically turns off if the unit is unused for more than 20 minutes. G Pressure gauge - Analog pressure gauge, filled with glycerine to ensure good dampening when reading pulsating pressures.
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Page 7: Specification
Specification EU Specification Model Flow Range Pressure Range Temperature Inlet/Outlet Number (lpm) (bar) Range (°C) Ports DHT401-B-6 10 - 400 0 - 420 0 - 120 1” BSPF DHT801-S-7 20 - 800 0 - 480 0 - 120 1 7/8” - 12 UN Dimensions (Millimetres) DHT401: 240 Wide, 200 Deep, 200 High DHT801: 245 Wide, 225 Deep, 225 High... - Page 8 HT 2 Series Analog Hydraulic Tester Tachometer Pressure Battery Display Battery input gauge voltage low (flow, temp, rpm) voltage ok Selector Battery switch cover G Display - Large analog display. Automatically turns off if the unit is unused for more than 20 minutes.
- Page 9 Specification EU Specification Flow Flow Scales Pressure Temperature Model Speed Inlet/Outlet Range (lpm) Range Range Number (rpm) Ports (lpm) High (bar) (°C) HT302-B-6 8 - 300 0 - 75 0 - 300 0 - 420 10 - 120 300 - 3000 1”...
- Page 10 DHT 2 Series Digital Hydraulic Tester Digital Pressure display gauge External Battery Tachometer Selector input flow cover switch G Digital display - Digital display for flow and temperature. Automatically turns off if the unit is unused for more than 20 minutes. G Change settings indicated by the ^ on the display - using the °C/F and UNITS buttons.
- Page 11 Specification EU Specification Model Flow Range Pressure Temperature Speed Inlet/Outlet Number (lpm) Range (bar) Range (°C) (rpm) Ports DHT302-B-6 8 - 300 0 - 420 10 - 120 300 - 6000 1” BSPF DHT402-B-6 10 - 400 0 - 420 10 - 120 300 - 6000 1”...
- Page 12 DHM 3 Series Digital Hydraulic Multimeter Contrast Contrast Digital On/Off down display switch Toggle Toggle: Clear Toggle Battery screen temperature, peak pressure and cover power, P-Q power units G Digital display - Large digital display. Automatically turns off if the unit is unused for more than 20 minutes.
- Page 13 Specification EU Specification Model Flow Range Pressure Range Temperature Inlet/Outlet Number (lpm) (bar) Range (°C) Ports DHM403-B-6 10 - 400 0 - 420 (0 - 600 peak) 0 - 120 1” BSPF DHM803-S-7 20 - 800 0 - 480 (0 - 600 peak) 0 - 120 1 7/8”...
- Page 14 Screen 1 (Digital) This screen displays the measurement type, value and engineering units in digital format. Screen 2 (Analogue) This screen displays the measurements in the same order as in SCREEN 1, but this time displays the value, engineering units and a bar graph which corresponds to the value indicated. The bar graph is scaled from zero to the maximum calibrated value for the tester (see below).
- Page 15 DHM Operation Turn the tester on by flipping the rocker switch to the ‘ON’ position. The display will return to the last screen viewed, indicating the current conditions. The engineering units will be as selected when the tester was last used. If the screen starts flashing, then the battery should be replaced as soon as possible.
- Page 16 Press if you wish to see the readings displayed as values, engineering units and a bar graph, this is screen2. Pressing will once again allow you to change the engineering units for pressure. Pressing will toggle the bottom line of the display between temperature and power.
- Page 17 To set the reference point for efficiency testing on screen3, you must first reduce the system pressure as much as you can and set your pump to the speed you wish to test at. Press and the current conditions will be stored as the reference (with the assumption that 100% efficiency is achieved at this point).
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