PPV1000

The softening point of a glass is the most widely used production control parameter. Changes in the softening point temperature are indications of chemistry changes. The Orton Model PPV-1000 is viscous compression, parallel plate viscometer that was designed to measure automatically the viscosities of solid glass cylinders (6 to 12 mm OD by 3 to 6 mm thick) in the viscosity range of log 9.0 to log 5.0 Poise as a function of temperature according to the ASTM C-1351M procedure guidelines. Since this range includes the softening point range (approximately log 7 to log 8 poise), softening point temperatures of glasses that cannot be flame worked can still be measured quickly and easily.

(Note: 如果必需使用玻璃絲方式測定軟化點, 可選用 Model SP-1000, Littleton Softening Point Method, ASTM C-338.)

Automatic Viscosity Determination

It is easy to measure temperatures for a range of viscosities of a glass disc. The operator enters the disc dimensions into the computer system, places the sample between the plates, applies the weight, aligns the LVDT, begins the test, and walks away. The system does the rest. The operator is free to perform other tasks. A little while later, a table of viscosity / temperature relationship is available. It's that easy.Model PPV-1000 automatically calculates the viscosities for the test temperature range. This eliminates operator differences, operator judgments, operator biases and errors. Model PPV-1000 is an EASY, ACCURATE, RELIABLE, and REPRODUCIBLE instrument for R&D and for QC checks on batch chemistry change.

The sample is heated by a 1,000°C Kanthal wound vertical tube furnace with a type "S" control thermocouple and is mounted on a support frame with a motorized system to raise and lower the furnace for sample loading and unloading. The glass sample is placed between the top plate, a 44 millimeter diameter by 6 millimeter thick disc of a refractory metal alloy that is connected to the bottom of the probe rod, and the bottom plate, a 44 millimeter diameter by 6 millimeter thick refractory metal alloy disc. Two thin sheets of platinum foil, 0.001 inch thick by 40 millimeter diameter, lie between the glass sample and top and bottom discs to make sample removal easy. The sample and parallel plate stack rest upon a fixed position fused quartz tube pedestal.

Sample compression is monitored continuously by a vertical, counter-weighted, fused quartz probe rod and overhead LVDT (± 2.5 mm linear range) assembly. The load to the sample is adjusted by placing various static weights on either side of the counter-weighted pulley system. Three weights are included. Sample plate expansion and system movement is negated by a fused quartz compensation rod resting on a 12 mm tall compensation block (refractory metal alloy), and in contact with the LVDT coil assembly. Sample temperature is monitored by a type “S” thermocouple located immediately adjacent to the sample.

A higher temperature version of the PPV is available (1,600°C) and uses high alumina components in place of the fused quartz components, and a molybdenum disilicide heated furnace instead of Kanthal wire. The higher temperature version of the PPV also requires the sample plates to be made from a platinum alloy, which can be supplied by the user.

Operation (ASTM C-1351M) 平板玻璃高溫黏度計方法 Log 9.0 - 5.0 Poise 方法

The heart of the Model PPV-1000 is the special Orton PPV Software. The Orton PPV Software is loaded into the user supplied computer, and is connected to the Orton PPV Control Console via the included RS-232 or USB interface cable (purchaser to specify which connector style). The operator selects the mode of operation, inputs the sample size and applied load, and the software does the rest. The Data Acquisition Software directs the PID controller to follow the thermal cycle, collects the data signals from the sample thermocouple and LVDT system, displays the data on the computer monitor in real time, performs the appropriate viscosity calculations, stores the data and calculations in a text file on the hard drive, and sends instructions to the PID controller to modify the thermal cycle accordingly. The Data Analysis Software also opens past data files for post testing review, analysis, and report generation.

Model PPV-1000 / 1200 / 1600 Specifications
待測樣品平板材質	Inconel / 白金 / 白金
Probe / Compensation Rod	Fused Quartz / High Alumina
操作溫度	1000°C / 1200°C / 1600°C
加熱線	Kanthal A-1 / Kanthal A-1 / Molybdenum Disilicide.
溫度控制器	PID - Automatic
玻璃待測樣品壓縮追蹤測定方式	Counterweighted LVDT
測定資料詰取與分析	Automatic
電源	120 VAC, 10 amp, 50/60 Hz (240 VAC available)
Measuring Unit Dimensions	12” W x 14” D x 33” T (305 x 355 x 840 mm)
Controller Dimensions	18” W x 12” D x 5” T (460 x 305 x 130 mm)

*Descriptions & specifications are subject to change without notice

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