Key International, Inc. • Englishtown, NJ • U.S.A. Page 2 Table of Contents General Description .............................4 Introduction ..............................4 Specifications ............................4 Method of Operation ..........................5 Putting into Operation ..........................5 Wiring ...............................5 Inserting the Chart Paper ..........................6 Operating Keyboard .............................7 Operating controls ............................7 Power Button ............................7...
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Hardness Tester • Model HT-300/500 • Version 1.0 Page 3 Connection of an external start-keY .......................10 Connection to arallel-interface (94-00442) (OPTION) ...............10 Plug connections .............................10 a) 5-pin socket: ............................10 Spare Parts List ............................16...
Key International, Inc. • Englishtown, NJ • U.S.A. Page 4 General Description Introduction The PTB 300 is a high performance hardness tester, which can accurately measure the tensile strength of tablets, ampoules, food and other articles, either in single or in series operation. The tensile strength can be printed out in Kilopond (Kp), Newton (N) or Strong Cobb (SC) units, according to the operator's specifications.
Method of Operation Figure 1: Method of Operation After pressing the START-key, the zero-value of the load cell is teterminet ant aeoret in the microprocessor. If the value is within the permittet range, the motor, controllet by the regulator-unit ant the motor-amplifier, causes the plunger to move at a constant speed towarta the apecimen.
Key International, Inc. • Englishtown, NJ • U.S.A. Page 6 • connect power supply line. Figure 2: Back of Unit 1. Output 25-pin, plug female type D (parallel-interface) 2. Power input with fuse (250 mA at 220 Volt, 500 mA at 115 Volt) 3.
Hardness Tester • Model HT-300/500 • Version 1.0 Page 7 Operating Keyboard Operating controls Power Button Switch on the instrument by pressing the POWER button (1). When pressed the switch should iluminate to indicate that the power has been switched on.
The message "HT 300 xx.xx" is printed out. (The number xx.xx is important for service, requests etc.). Zero balance After starting the test program set the RESTART switch to 1. Presa STOP key. The message "yyyy" is printed out. V...
The value "yyyy" must lie between 20 and 60. Is this not the case, adjust the potentiometer "ZERO" so that the value does reach this range. By pressing the STOP-key the zero point can be printed out as often as required. Differencea of less than 7 between the single printouts are normal and do not influence the accuracy of the instrument.
CONNECTION POSSIBILITIES Connection of an external start-keY It ia possible to connect an external atart-key (e.g. footswitch) to the 5-pin aecket; the function of an external atart-key ia identical to that of the internal one. When starting, the sockets 1 ant 3 muat be short-circuited (30 Y, 30 mA).
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Hardness Tester • Model HT-300/500 • Version 1.0 Page 11 b) 25-pin socket on parallel interface (TRW-Cinch DBC-25S) 50-pin aocket on connecting cable (A~phenol 57-30500) The program version 8245 of the aTB300 gives following additional possibilities. - Self test - printout of result with average value...
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Key International, Inc. • Englishtown, NJ • U.S.A. Page 12 sum of breaking-value batch size MEASUREMENT is executed normally (with or without RESTART) CALLING the additional information after thc last measurement - set RESTART-switch to position 9 - press STOP-key and keep it pressed...
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Hardness Tester • Model HT-300/500 • Version 1.0 Page 13 4.5 KP 3.7 KP 3.9 KP 4.3 KP 4.8 KP 4.0 KP - no. of samples - average value - lowest value - highest value - last measurement The additional printout ensues automatically if the extreme values are reached in a measuring series:...
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Key International, Inc. • Englishtown, NJ • U.S.A. Page 14 110, 150, 300. 600, 1~00, 2400, 4800, 9600 OFF (aus) ODD (ungerade) ON (e~n; EVEN (gerade) The same information which is output to the printer, is also available on th~ connector.
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Hardness Tester • Model HT-300/500 • Version 1.0 Page 15 As STOP-Switch Continuously Continuously Continuously 1 Continuously (except tool is moving fore) MEAN VALUE REPEAT OUTPUT FUNCTION KEYBOARD START START switch STOP STOP switch Printer ON i Printer OFF Printer of. PTB300 ON...
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Key International, Inc. • Englishtown, NJ • U.S.A. Page 16 Spare Parts List Part Number Description 15-156- Power Button 15-156- Start/Stop Button 15-156- Button Lamp 15-156- Button Lens 15-156- Button Cover Top 15-156- Button Cover Bottom 15-156- Restart Switch (Digit Switch)
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