Instruction/ maintenance manual of the product QHW 3 LG Electronics
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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…………………………………………………….
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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.
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.
- 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.
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.
- 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 .
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.
- 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.
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.
- 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.
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.
- 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 Conne.
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.
- 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".
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 .
An important point after buying a device LG Electronics QHW 3 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought LG Electronics QHW 3 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data LG Electronics QHW 3 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, LG Electronics QHW 3 you will learn all the available features of the product, as well as information on its operation. The information that you get LG Electronics QHW 3 will certainly help you make a decision on the purchase.
If you already are a holder of LG Electronics QHW 3, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime LG Electronics QHW 3.
However, one of the most important roles played by the user manual is to help in solving problems with LG Electronics QHW 3. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device LG Electronics QHW 3 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
