• Counterbalanced drive for smooth, quiet operation.

• Integral hopper for easy sample handling.

• Fully enclosed to minimize dust.

• Built-in digital timer for maximum test repeatability.

The redesigned Test-Master® Testing Screen now features an easily controlled, integrated hopper for easier introduction of sample material and vertically-hinged front panel doors for improved access and clearance. The 1.6ft³ (45.3L) hopper is hinged at the rear and allows the sample to be introduced incrementally as the machine is running. When the hopper is closed, a panel blocks dust from escaping through the opening. The narrower panel doors require less space to open and fold flat across the front of the unit. The doors also feature a safety interlock switch that disables the Test-Master® when open.

TM-5 with six-screen tray capacity, and seven-tray TM-6 units feature the same reliable counterbalanced drive assembly, fully enclosed operation and electronic digital controller as our previous models. Sample vibration characteristics are identical to our TS-1 and TS-2 models and the Screen Trays are interchangeable. Internal rotating counterweights of the Test-Master® drive system equalize the vertical screening action to assure smooth, quiet operation and prevent transfer of vibrations to other lab instruments.

The Test-Master® may be placed anywhere in the lab and does not require permanent installation. A built-in, UL approved electronic controller has LED display of time remaining and produces an audible tone at the end of the test cycle. Test cycles lasting up to 99 minutes, 59 seconds may be programmed and cycles may be interrupted without loss of test time. An ergonomically operated foot-pedal easily operates the hydraulic clamping and pressure release system for the screen trays.

Screen Trays and Dust Pans for Test-Master units are ordered separately. The Dustpan may optionally be placed on the bottom shelf of the unit, freeing up a slot for an additional screen tray. Independently removable screen trays are shared by both the Testing Screen and Test- Master® models and are available in a wide range of opening sizes with ASTM E 11, ISO 565 specification cloth or punched steel plate. Screen cloth is replaceable, insuring long life and inexpensive maintenance of trays. Each tray features a generous 14.75x22.75in (375x578mm), 2.33ft² (0.22m²) clear screen area. Available Screen Trays, Dustpans and Replacement Mesh sizes are listed in the accompanying selection guide. Optional Dustpan configurations can be ordered for increased capacity. For samples with larger particle sizes, the wider tray spacing of the TM-5 allows more efficient agitation. Both operate with powerful, capacitor-start 1/3hp motor. Overall Dimensions: 28x35x50 in (711x889x1,270mm).

Test-Master® accessories and options allow greater versatility for processing a wider range of materials. Standard vibration characteristics are designed for coarse materials of mid-range density such as limestone or gravel. Separation of fine, sensitive or low density materials such as wood chips, coal or coke can be improved by adding the TSA-153 Speed Variation accessory and/ or the factory-installed TSA-201 Low-Amplitude Drive Shaft. These options reduce break-down of material during screening and allow the user to match screening characteristics to the specific material. Customers with special materials should contact a Gilson technical service representative. Other accessories such as Clean-N-Weigh and Tray Racks interchange with Testing Screen models, making the Test-Master® a good choice for an efficient upgrade in the modern lab.