QHW series
Digital Weighing Scales
User’s guide
UGQHW-E0204
Contents
SECTION 1 INTRODUCTION………………………………………………………………1
SECTION 2 SPECIFICATIONS……………………………………………………..……2 SECTION 3 INSTALLATION……………………………………………………..……….3
3.1General Installation……………………………………………………………………3
3.2Install of QHW series…………………………………………………………..………3 SECTION 4 KEY DESCRIPTIONS………………………………………………………4
SECTION 5 DISPLAYS………………………………………………………………….5 SECTION 6 OPERATION…………………………………………………………….…..6
6.1Zeroing the display…………………………………………………………………….6
6.2Taring……………………………………………………………………………..…….6
6.3Weighing a sample……………………………………………………………..…….6
6.4Percent weighing………………………………………………………………..…….6
6.5Parts counting……………………………………………………………………..…….7
6.6Check-weighing………..………………………………………………………..…….7
6.7Accumulated total………..………………………………………………………..…….8
6.8Manual accumulation………..…………………………………………………..…….8
6.9Automatic accumulation……..………………………………………………..…….9
SECTION 7 BATTERY OPERATION………………………………………………..…10 SECTION 8 RS-232 OUTPUT…………………………………………………………..11 SECTION 9 PARAMETERS……………………………………………………………12 SECTION 10 CALIBRATION……………………………………………………..……..13
SECTION 11 ERROR CODES…………………………………………………………15
SECTION 1 INTRODUCTION
The QHW series of scales provides an accurate, 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 platforms on an ABS base assembly.
All the keypads are sealed, color coded membrane switches and the displays are large easy to read liquid crystal type displays (LCD). The LCD’s are supplied with a backlight.
All units include automatic zero tracking, audible alarm for pre-set weights, automatic tare, pre-set tare and an accumulation facility that allows the count to be stored and recalled as an accumulated total.
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QHW digital weighing scales user’s guide
SECTION 2 SPECIFICATIONS
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QHW SERIES |
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Model # |
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QHW 3 |
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QHW 6 |
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QHW 15 |
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QHW 30 |
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Maximum Capacity |
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3kg |
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6kg |
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15kg |
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30kg |
Readability |
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0.1g |
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0.2 |
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0.5 |
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1g |
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Resolution |
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1:30000 |
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1:30000 |
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1:30000 |
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1:30000 |
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Tare Range |
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-3kg |
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-6kg |
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-10kg |
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-30kg |
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Minimum Capacity |
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2g |
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4g |
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10g |
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20g |
Repeatability (Std Dev) |
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0.1 |
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0.2 |
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0.5g |
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1g |
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Linearity ± |
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0.2g |
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0.4 |
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1g |
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2g |
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Units of Measure |
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kg, g, |
Lb., oz. |
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Common Specifications |
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Interface |
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RS-232 Output Optional |
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Stabilisation Time |
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2 Seconds typical |
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Operating Temperature |
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0°C - 40°C / 32°F - 104°F |
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Power supply (external) |
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115 / 230 Vac, 50/60Hz, 10 watts |
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Calibration |
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Automatic External |
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Display |
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6 digits LCD digital display |
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Draft shield |
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N/A |
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Balance Housing |
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ABS Plastic, Stainless Steel platform |
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Pan Size |
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225 x 300mm / 8.9 x 11.8” |
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Overall Dimensions (wxdxh) |
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320 x 340 x 125mm / 12.6 x 13.4 x 4.9” |
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Gross Weight |
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3.8kg/8.4lb |
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Applications |
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General Purpose Scale |
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Functions |
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Weighing, parts counting, % weight, Check weighing, |
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Other Features and Specs |
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Internal rechargeable battery (~70 hours operation) |
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