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manual abstract
Above the High Limit the display will show OK and the beeper will be on. BOTH LIMITS SET. LOW IS SET GREATER THAN HIGH The beeper will never sound and the display will show LOW if the weight is less that the LOW limit, and HIGH if the weight is greater than the Low Limit. NOTE: The weight must be greater than 20 scale divisions for the check weighing to operate. To disable the Check-Weighing function enter zero into both limits by pressing the FUNC/C key when the current limits are shown then pressing the ZERO/ENTER key to store the zero values. 6.7 ACCUMULATED TOTAL The scale can be set to accumulate automatically when a weight is added to he scale or manually by pressing the PRINT key. See the PARAMETERS Section for details of selecting the method. The accumulation function is only available when weighing. It is disabled during percent weighing or parts counting. 6.8 MANUAL ACCUMULATION When the scale is set to manual accumulation the weight displayed will be stored in memory when the PRINT key is pressed and the weight is stable. The display will show "ACC 1" and then the total in memory for 2 seconds before returning to normal. If the optional RS-232 interface is installed the weight will be output to a printer or PC. Remove the weight, allowing the scale to return to zero and put a second weight on. Press PRINT, the display will show "ACC 2" and then show the new total. Continue until all weights have been added. To view the totals in memory press the PRINT key when the scale is at zero. The display will show the total number of items "ACC xx" and the total weight before returning to zero. The totals will also be printed via the RS-232 interface. To erase the memory press PRINT to view the totals and then press the FUNC/C key to clear the memory. - 8 - 6.9 AUTOMATIC ACCUMULATION When the scale has been set to Automatic Accumulation the value is stored in memory automatically. Add a weight to the scale, the beeper will sound when the scale is stable to signify the value is accepted. Remove the weight. The display will show "ACC 1" and the totals in memory when the scale returns to zero. Adding a second weight will repeat the process. While the weight is on the scale it is permissible to press the PRINT key to store the value immediately. In this case the scale will not store the value when the weight is removed. The totals can be viewed as above. In all cases the scale must return to zero or a negative number before another sample can be added to the memory. More product can then be added and PRINT pressed again. This can continue for up to 99 entries, or until the capacity weight display is exceeded. - 9 - QHW digital weighing scales user’s guide SECTION 7 BATTERY OPERATION The scales can be operated from the battery if desired. The battery life is approximately 100 hours. When the battery needs charging the arrow above the low battery symbol under the weight display will turn on. The battery should be charged as soon as the arrow above the symbol is on. The scale will still operate for about 10 hours after which it will automatically switch off to protect the battery. To charge the battery simply plug into the mains power. The scale does not need to be turned on. The battery should be charged for 12 hours for full capacity. Just under the quantity display is an LED to indicate the status of battery charging. When the scale is plugged into the mains power the internal battery will be charged. If the LED is green the battery has a full charge. If it is Red the battery is nearly discharged and yellow indicates the battery is being charged. As the battery is used it may fail to hold a full charge. If the battery life becomes unacceptable then contact your distributor . - 10 - SECTION 8 RS-232 OUTPUT The QHW Series of scales can be ordered with an optional RS-232 output. Specifications: RS-232 output of weighing data ASCII code 4800 Baud 8 data bits No Parity Connector: 9 pin d-subminiature socket Pin 2 Output Pin 3 Input, not used at this time Pin 5 Signal Ground Data Format for normal weighing operations, parts counting or recalling of totals from memory will all be different. Examples follow: Normal Output GS 1.234kg GS for Gross weight, NT for net weight and a unit of weight No.. 1 This number increments every time a new value is stored in memory Total 1.234kg The total value stored in memory
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