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Table of contents for the manual
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UGQHW-E0204 QHW series Digit al W eighing Scales User ’ s guide[...]
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Contents SECTION 1 INTRODUCTION………………………………………………………………1 SECTION 2 SPECIFICA T IONS……………………………………………………..……2 SECTION 3 INST ALLA TION……………………………………………………..……….3 3.1 General Installation………………………[...]
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- 1 - SECTION 1 INTRODUCTION The QHW series of scales provides an accu rate, fast and versatile series of general purpose weighing scales with counting, % weighing and check-weighing functions. There are 4 models in each series, with capacities up to 30 kg. They all have stainless steel weighing plat forms on an ABS base assembly . All the keypads [...]
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QHW digital weighing scales user’s guide - 2 - SECTION 2 SPECIFICA T IONS QHW SERIES Model # QHW 3 QHW 6 QHW 15 QHW 30 Maximum Capacity 3kg 6kg 15kg 30kg Readability 0.1g 0.2 0.5 1g Resolution 1:30000 1:30000 1:30000 1:30000 Tare Range -3kg -6kg -10kg -30kg Minimum Capacity 2g 4g 10g 20g Repeatability (Std Dev) 0.1 0.2 0.5g 1g Linearity ± 0.2g 0[...]
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- 3 - S E C T I O N 3 I N S T A L L A T I O N 3.1 GENERAL INST ALLA TION The scales should be sited in a location that will not degrade the accuracy . A void extremes of temperature. Do not place in direct sunlight or near air conditioning vents. A void unsuitable tables. The t ables or fl oor must be rigid and not vibrate. Do not place near vibrat[...]
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QHW digital weighing scales user’s guide - 4 - S E C T I O N 4 K E Y D E S C R I P T I O N S Zero or Set the zero point for all subsequent weighing. The display shows zero. A secondary function , of "Ent er" key when setting parameters or other functions. Ta r e or T ares the scale. S tores the current weight in memory as a t are value,[...]
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- 5 - S E C T I O N 5 D I S P L A Y S The LCD display will show a value and a unit to the right of the digits. In addition there are labels for T ARE, GROSS weight, ZERO and for Low battery 888888 OK HI LO GR OSS TA R E ZE RO g/ pcs oz % tkgl b Checkwei ghi ng Sym bol s S ta b ility S y m b o l Low Bat t ery Sym bol Part s Count i ng U ni t s W e i[...]
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QHW digital weighing scales user’s guide - 6 - S E C T I O N 6 O P E R A T I O N 6.1 ZEROING THE DISPLA Y Y ou can press the ZERO/ENTER key at any time to set the zero point from which all other weighing and counting is measured, within 4% of power up zero. This will usually only be necessary when the platfo rm is empty . When the zero point is o[...]
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- 7 - of weight will cause the display to jump to 102.13% as one scale division (0.5g) increase to 24.0g will be equivalent to a 2.13% increase. Removing the 350g weight and putting a 300g weight on the scale the display will show 85.71% as 300g is 85.71% of 350g. Pressing the FUNC key will return the scale to weighing. 6.5 P ARTS COUNTING When the[...]
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QHW digital weighing scales user’s guide - 8 - BOTH LIMITS SET The display will show OK and the beeper will sound when the weight is between the limits. LOW LIMIT SET , HIGH LIMIT is set to zero The display will show OK and the beeper will sound when the weight is less than the Low Limit. Above the Low Limit the display will show HIGH and the bee[...]
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- 9 - 6.9 AUTOMA TIC ACCUMULA TION 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 [...]
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QHW digital weighing scales user’s guide - 10 - S E C T I O N 7 B A T T E R Y O P E R A T I O N The scales can be operated fr om 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[...]
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- 11 - SECTION 8 RS-232 OUTPUT The QHW Series of scales can be ordered with an optional RS-232 output. S pecifications: RS-232 output of weighing data ASCII code 4800 Baud 8 data bit s 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, p a [...]
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QHW digital weighing scales user’s guide - 12 - SECTION 9 P ARAMETERS The scale has 6 parameters that can be set by the user . These allow the user to set the scale to: • Display the weight in other increments of weight to minimize the af fects of vibration, wind or other environmental conditions. • Control the back light on the display . It [...]
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- 13 - S E C T I O N 1 0 C A L I B R A T I O N 10.1 Linear calibrate T o start calibration turn the scale of f and then turn it back on. Press the limit and % keys together during the initial count ing from 9 to 0 on the display . The display will show "unLoAd". Remove a ll weight from the p an and then press the ZERO/ENTER key to set the[...]
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QHW digital weighing scales user’s guide - 14 - S E C T I O N 1 1 E R R O R C O D E S During the initial power-on te sting or during operation it is possible the scale may show an error message. The meaning of the error messages is described below . If an error message is shown repeat the pr ocedure that caused the message, turning the balance on[...]