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Yantrika DWT 300, Инструкция по эксплуатации

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"Process Instruments and Calibrators"

Dead Weight Tester

Instruction Manual

Содержание DWT 300

Страница 1: ... Process Instruments and Calibrators Dead Weight Tester Instruction Manual ...

Страница 2: ...rcuit Main Block This is the manifold that connects the screw pump to the tester Piston Cylinder Unit PCU This is mounted on the top face of the low high pressure block Oil from the block flows through the mounting column and the pressure acts below thepiston A weight carrier is fixed on the piston to provide a loading surface on which weights are stacked A weight marked carrier if supplied must a...

Страница 3: ... weight including carriers are marked with the pressure equivalent of the weight and the serial number of the tester for which it is calibrated The weights have a projection on the top face and a recess on the bottom face to maintain concentric stacking of the weights on the carrier or elsewhere Release Valve The release valve is the only user operable valve in the system It should be left open du...

Страница 4: ...struments and Calibrators Instruction Manual Legend 1 2 3 4 5 HP Piston Carrier LP Piston Carrier Oil Reservoir Screw Pump Gauge Block 6 7 8 9 10 Main Block Handle Rod Leveling Screw Gauge Connector Release Valve ...

Страница 5: ...in the tool box Install the following as shown in the illustration on the previous page a Levelling screws b Screw pump handle rods c Place the weight carrier on the LP Piston Place the bell and carrier on HP Piston If Electrical Power Rotation is ordered with the tester attach the motor assembly to the baseplate of thetester by means of the bolts provided Tighten well Attach the motor driving bel...

Страница 6: ...d on top of the fixed piece This has been done to reduce chances of transportation damage in an improperly packed machine Please make sure that both carrier pieces are put on the machine before any readings are taken Please also note that weights may be placed on the LP or HP piston as desired The pressure indicated would be according to which of the 2 PCUs is floating on Oil Pressure h Turn the s...

Страница 7: ...w driver or a very light hammer Check readings once again Study the test results of the pressure gauge and resolve the error at each point so as to find the zero error and the continuous increase decrease of error Install the pressure gauge on the tester and proceed as follows Note Zero error is not corrected at the zero point of the gauge Ratio Error Error continuously increases or decreases Ther...

Страница 8: ...The columns need not be removed if the tester does not have electrical power rotation Now remove the sheet metal cover of the tester Unscrew the screw nut which is the outermost piece in the screw pump cylinder assembly and pull the screw along with the dual area plunger out of the tester Replace the O rings with fresh ones taking care not to introduce any wrinkles or twisting while installing the...

Страница 9: ...range and leave for a few minutes to allow trapped air to escape b Pistons should be clean If pistons get stuck or appear tight in rotation clean the pistons with clean solvent like carbon tetrachloride or isopropyl alcohol apply oil fit back and rotate the weights at high pressure to free them c Large pressure drops will show up as leak Open cover and check seal nearest to oil spill ...

Страница 10: ...d for calibration of pressure transmitters PT100 and recorder inputs along with above instruments Digital Pressure Gauges High Accuracy Various Ranges from Vacuum to 700 bar Handheld Comparison Test Pump Calibration of Pressure From 1 to 700 bar Hand Held Documenting Pressure Calibrator Testing procedures of the pressure process instrument Precision Master Gauges Various Ranges from Vacuum to 2500...

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