KN -100

[EOU]

We would never entertain even the idea that you have done something wrong Ken. Either we have failed in our attempt to transmit operating information to you in a sufficient and coherent manner or we have provided you with a faulty piece of equipment. Our error(s) may fall in one of two possible arenas. One possibility is this:

   

Pictured above is the keypad of the original PT50 and below the keypad of the newer PT50B. Keypad operation of the two is different in that with the older PT50 one must first power the unit on and then after power-up, press the Sharp Check key to enter Sharp Check mode. In Sharp Check mode the display backlight comes on and stays on. In Sharp Check mode the highest force measured during the measurement cycle is locked on the display. If the Sharp Check key is not pressed after the unit is powered up, the unit does not  lock the greatest value on the display. Press the "tare" or "on/off key" to reset.

With the PT50A-B and C there is no "Sharp Check" key. The unit automatically comes up in Sharp Check mode on power-up and to backlight or not backlight the display is optional. 

   

The other possibility is that your PT50 is not switching into Sharp Check mode when the key is pressed. If that is the case please let us know.

Hope this helps to identify the problem.