As575 Intrinsically Safe Weight Scale System For Filling Lpg Cylinders

Transcript

AS575 INTRINSICALLY SAFE WEIGHT SCALE SYSTEM FOR FILLING LPG CYLINDERS OPERATORS MANUAL Document No. 80112-20.MAN This manual applies to software No. 60262, up to ver 1.00 Issue Date: November 2003 Designed by: actronic Kosel Industries reserves the right to make changes to the Kosel Industries range of products without prior notice and assumes no liability in connection with the use of any Kosel Industries branded product © 2003, Kosel Industries ! SAFETY WARNING ! This equipment is designed for installation in a hazardous area. Kosel Industries requires that its equipment will be installed by experienced professionals and all safety requirements for the hazardous area are adhered to. Safety must be a major consideration at all times. Not only for the installer, but also for those who continue to use and maintain the equipment. Along with the installation details listed in this manual, the installer must also comply with all applicable industry practises and regulations. Kosel Industries accepts no liability for incidental, special, indirect or consequential damages resulting from an installers or operators failure to follow the guidelines in this manual, or those generally applicable to the industry in which the equipment is utilised. The foregoing limitation extends to damages for personal injury, property damage, loss of operations, loss of product time, whether incurred by the installer, operator, operator’s employer, or any other third party. Installation or use of the Kosel Industries equipment shall constitute acceptance of the above conditions and limitations. TOOLS AND SAFETY EQUIPMENT In order to carry out the operations outlined in this Installation Manual it is essential that the trained installer uses the correct tools which must be in good condition and working order. USE OF EQUIPMENT This equipment is used to control the flow of LP Gas. LP Gas is a highly inflammable gas and is toxic when inhaled. Incorrect or careless use of this and associated equipment may cause the release of LP Gas into the atmosphere, potentially creating an explosive or dangerous situation. All personnel must be familiar with local safety requirements and have been fully trained in the use of this equipment before operating. WARNING All electrical and electronic parts and the flameproof enclosure have been specifically approved for this system for use in Zone I hazardous areas, Class I Group IIA gases. Any substitution of components within this system may violate these approvals and should not be attempted without the express approval of KOSEL INDUSTRIES. Contents 1. Introduction ............................................................................ 1 2. Description ............................................................................. 2 3. The System ............................................................................ 3 4. The Indicator .......................................................................... 4 5. The Keyboard ........................................................................ 6 6. Operator Instructions .............................................................. 7 7. Entering EW & WC................................................................. 9 8. Filling Sequence................................................................... 10 9. Zero ..................................................................................... 14 10. Last Sale Price ..................................................................... 14 11. Totalisers ............................................................................. 14 12. Pump Interlock .................................................................... 15 13. Error Messages ................................................................... 15 Operators Manual AS 575 1. Introduction LPG under pressure (in a cylinder) is a liquid. As a liquid its volume will increase (expand) if heated. A cylinder that is completely filled with LPG and left in the sun, or in front of a heater will, under the pressure of the expanding LPG, cause the pressure relief valve to operate, with potentially dangerous results. In order to avoid this situation an LPG cylinder must never be filled to more than 80% by volume, leaving a "vapour space" in the cylinder to allow for expansion of the liquid. There are two ways of ensuring that the cylinder is filled to only 80% by volume: 1. By using the Empty Weight (EW) and Water Capacity (WC) figures that are stamped on the shroud or skirt of the cylinder, the maximum weight of LPG that can be safely added to maintain the "vapour space", can be calculated. 2. By using the "ullage valve" incorporated in most cylinders. This valve, when open, is designed to expel liquid when the cylinder is 80% full. This serves only as an indication to the operator. The LPG Cylinder Filling System uses both of these methods to control the filling of cylinders to their maximum allowable level. © 2003 Kosel Industries / Doc 80112-20.MAN 1 AS575 Operators Manual 2. Description The AS575 system consists of three parts: i) a weighing platform, type AS579 ii) a power supply in a flame proof enclosure, type AS574 iii) an indicator/control unit, type AS570. The platform can measure weights up to 99.9kg. Cylinders to be filled are weighed on the platform and the indicator/control unit operates the LPG pump and a solenoid valve to control the flow of LPG into the cylinder. The indicator/control unit also calculates and displays the price and weight of the LPG dispensed and communicates with the forecourt computer. Larger LPG cylinders are filled automatically. The control unit calculates the amount of gas to be dispensed and the cylinder to be filled is placed on the platform and its weight is monitored as the LPG is pumped into it. When the cylinder is filled to the correct amount the control unit turns off the pump and valve. Small cylinders are filled manually, using the ullage valve to indicate that the cylinder is full. The cylinder is then weighed to check that its total weight does not exceed the maximum allowable weight as calculated by the control unit. Before filling any cylinder, two numbers must be entered into the indicator. These are: i) WC (Water Capacity of the cylinder in kg) and ii) EW (Empty Weight of the cylinder in kg.) How to enter these numbers is explained in section 7 – page 9. From this cylinder data, the control unit automatically determines which method of filling is to be used. Normally, cylinders with a Water Capacity of 5kg or more (this figure may be set to other values as required) are filled automatically by weight and those with a Water Capacity of less than 5kg are filled manually to ullage by decanting. 2 © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 3. The System ENTER DATA EW 7 8 WC 4 5 6 1 2 3 9 LAST SALE TH IS SALE Bottle Valve HALT FILLING FILL COMPLETE kg MAX F.W. PRICE/ kg ZERO CONFIRM WEI GHT ATTACH VALVE START FILL 0 STOP ENT CLR TARE EW kg Indicator/control Unit PL ACE CYL IND ER ZERO MAX F.W. WC MO DEL AS570 Fill Valve Filling Hose Power Supply and pump control Ullage Valve Weighing Platform PLATFORM: Cylinders are placed on this to be weighed. Weights of up to 99.9kg can be measured INDICATOR: The AS570 indicator displays the weight and price and controls the filling. FILLING HOSE: Flexible hose that connects the LPG cylinder to the solenoid valve. FILL VALVE: The attachment that couples the hose to the LPG cylinder. Includes a manually operated valve. POWER SUPPLY: Provides power to the indicator and contains interfaces for the control of the LPG pump and solenoid valve and the forecourt communications. The LPG cylinder has on it two valves: CYLINDER VALVE: For sealing the contents of the cylinder. ULLAGE VALVE: For indicating when the cylinder is full. © 2003 Kosel Industries / Doc 80112-20.MAN 3 AS575 Operators Manual 4. The Indicator Price Display Price / kg Display Weight Display LED indicators Keyboard PRICE DISPLAY: Displays price of the current sale. This price is sent to the forecourt computer when the filling operation is completed. PRICE/KG DISPLAY: Displays: i. the current price per kg of LPG except when filling small cylinders where it displays the word FEE indicating a fixed price, and ii. when the MAX F.W. key is pressed, it displays the maximum allowable total weight. WEIGHT DISPLAY: Displays: i. the weight on the platform in kg, and when automatically filling, the weight of the LPG that has been dispensed, and ii. during data entry displays the "EW" or "WC" data. KEYBOARD: 4 From this keyboard, cylinder data (Empty Weight and Water Capacity) can be entered, and the filling operation controlled. © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 LED INDICATOR LIGHTS: Eight LED anunciators indicate the status of the system. From the top, they are: 1. HALT - the filling has temporarily stopped. When this light is on the filling cannot be restarted. When the light is flashing, the filling can be restarted by pressing the START FILL key. 2. FILLING - the cylinder is being filled. 3. FILL COMPLETE - the filling has finished and the "price" is sent to the forecourt computer. 4. kg MAX FW - on when the MAX F.W. key is pressed and the middle display will be showing the calculated maximum allowable total weight in kg. 5. ZERO - on when the platform has nothing on it and the indicator is measuring a true ZERO. 6. NET - the weight of the cylinder, its contents, fittings and hose has been subtracted from the total weight and the bottom display is showing only the weight of the LPG that has been added to the cylinder. 7. EW - on when the weight displayed on the bottom display is the "Empty Weight" figure. 8. WC - on when the weight displayed on the bottom display is the "Water Capacity" figure. © 2003 Kosel Industries / Doc 80112-20.MAN 5 AS575 Operators Manual 5. The Keyboard There are 20 keys on the keyboard providing the following functions: EW - used to enter and display the Empty Weight data. WC - used to enter and display the Water Capacity data. CONFIRM WEIGHT - used to check weigh the cylinder before filling begins. START FILL - starts the filling if cylinder data and weights are correct. STOP - turns the LPG pump and valve off and, if pressed twice completes the filling operation. LAST SALE - displays the last sale price and weight on the top and bottom displays. NUMBER KEYS (0 - 9) and DP (Decimal Point) - used to enter cylinder data (Empty Weight and Water Capacity). ENT - used only during engineering setup and calibration. ZERO - if the weight on the platform is less than 2kg when pressed will ZERO the display and the ZERO enunciator will turn on. MAX F.W. - shows on the middle display (after the EW and WC data has been entered and the cylinder is not filling) the calculated maximum allowable weight for the cylinder and contents. CLR - if a mistake is made when entering a number, pressing CLR will clear the number to zero before re-entering the correct number. 6 © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 6. Operator Instructions FILLING AN LPG CYLINDER BY WEIGHT (AUTOMATIC FILLING and PRICE COMPUTING) 1. Check Zero (see Section 9 – page 14). 2. Check the cylinder for: i) last test date (must be within 10 years). ii) LAB No. (no LAB No. - no fill). iii) rust, dents and other damage. 3. Press EW and enter Empty Weight data obtained from the cylinder (see Section 7 – page 9). 4. Press WC and enter Water Capacity data obtained from the cylinder (see Section 7 – page 9). ZERO EW WC 5. Place the cylinder on the platform. 6. Press CONFIRM WEIGHT - keep hands clear of the cylinder. 7. Attach the hose, and open the cylinder valve. Ensure the filling hose does not touch the cabinet. CONFIRM WEIGHT 8. Press START FILL (hands off the cylinder). 9. When the FILLING light comes on, open the fill valve. START FILL 10. When the FILL COMPLETE light turns on close the fill valve and the cylinder valve. 11. Remove the hose. The displays will prompt the operator to check the maximum full weight. 12. Press MAX F.W. and compare the actual weight on the bottom display with the MAX F.W. figure on the middle display. If the actual weight exceeds the calculated MFW by 0.2kg, the top display shows OFILL and the beeper sounds. MAX F.W. If the Over fill message (OFILL) is displayed the cylinder should be checked and if necessary remedial action taken. 13. Perform the soapy water test and affix labels. 14. Remove the cylinder from the platform. © 2003 Kosel Industries / Doc 80112-20.MAN 7 AS575 Operators Manual DECANT FILLING AN LPG CYLINDER (FILLING TO ULLAGE and no PRICE COMPUTING) 1. Check Zero (see Section 9 - page14). ZERO 2. Check cylinder for: i) last test date. (must be within 10 years) ii) LAB No. (no LAB No. - no fill) iii) rust, dents, and other damage. 3. Press EW and enter the Empty Weight data obtained from the cylinder (see Section 7 – page 9). 4. Press WC and enter the Water Capacity data obtained from the cylinder (see Section 7 – page 9). EW WC 5. Press CONFIRM WEIGHT - the middle display will show FEE and the top display will show the fee price. 6. Place the cylinder in an upright position either on or off the platform. CONFIRM WEIGHT 7. Attach the hose. 8. Open the cylinder valve and ullage valve. START FILL 9. Press START FILL. 10. Open the FILL valve and the cylinder will start to fill. 11. When liquid starts escaping from the ullage valve, close the fill valve, then the ullage valve and the cylinder valve. 12. Remove the hose. 13. Press STOP. The display will now prompt to check the maximum full weight of the cylinder. 14. With the cylinder on the platform, press the MAX F.W. key to display the maximum allowable weight on the middle display for comparison with the actual weight on the bottom display. If the actual weight exceeds the calculated weight the top display shows OFILL and the beeper sounds. Only after this test is the fee price sent to the forecourt computer. STOP MAX F.W. If the Over fill message (OFILL) is displayed the cylinder should be checked and if necessary remedial action taken. 15. Perform the soapy water test and affix labels. 16. Remove the cylinder from the platform. 8 © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 7. Entering EW & WC ENTERING EW (EMPTY WEIGHT) • • • Press EW and the bottom display will show " - - - " and the EW light will come on. While the EW light is on, key in the EW data using the numeric and decimal point keys. Incorrect entries can be cleared to 0.0 by pressing the CLR key. The entry can be accepted by pressing the WC key - the bottom display will show " - - - " in readiness for entry of WC data and the WC light will come on. ENTERING WC (WATER CAPACITY) • • • Press WC and the bottom display will show " - - - "and the WC light will come on. While the WC light is on, key in the WC data using the numeric and decimal point keys. Incorrect entries can be cleared to 0.0 by pressing the CLR key. The entry can be accepted two ways: i. By pressing the EW key (the bottom display will show the current EW data, which may be changed, if desired, and the EW light will be on) or ii. By pressing the CONFIRM WEIGHT key (the weight on the platform will be checked and the bottom display will show the current weight on the platform.). If after entering the EW or WC data, no further keyboard operations take place for 90 seconds, (this time is set in the Engineering setup) this filling sequence is aborted and the EW and WC data is lost and the Weigh Indicator reverts to its pre-filling state. Confirmation of the data entered can be obtained by pressing EW or WC at any time when not filling and the display will show the data entered and the corresponding light will come on. Pressing CONFIRM WEIGHT rechecks the weight on the platform and then the bottom display reverts back to the live platform weight. If the weight on the platform is less than the entered EW figure or more than the "maximum allowable full weight", as determined by the control unit, the keyboard beeper will sound an "error beep" (three short beeps) and the procedure cannot be continued. The error can be corrected by re-entering the EW or WC data, or by placing the correct cylinder on the platform. If the weight on the platform is correct a beep of about half a second will sound. From the empty weight and water capacity data entered the weigh indicator determines: 1 THE MAXIMUM FULL WEIGHT ALLOWABLE (to stay within safe limits). This weight is shown on the middle display while the Maximum Full Weight key (MAX F.W.) is pressed. The MAX F.W. light will be on while this weight is displayed. The Maximum Full Weight is calculated as: MAX F.W. = EW + (WC x 0.444) kg. where 0.444 is the filling factor. If the Maximum Full Weight exceeds 98.0kg the Weigh Indicator will not allow the filling sequence to proceed. (This allows for a hose weight of up to 2kg.) 2 THE TYPE OF FILLING PROCEDURE TO BE USED. © 2003 Kosel Industries / Doc 80112-20.MAN 9 AS575 Operators Manual If the Water Capacity figure entered is less than 5kg (this threshold may be set to other values as required but is, in NZ, typically 5kg), the automatic filling and price computing functions of the system are made inoperative. The middle display shows FEE and the top display shows the fee price. 8. Filling Sequence Automatic Filling by Weight Price Computing, Pump Filling Permitted. This method used when the entered WC is equal to or greater than the threshold figure set by an engineering function (in NZ typically 5kg). DETAILED DESCRIPTION 1. Enter the EW from the cylinder data as described in section 7 – page 9. 2. Enter the WC from the cylinder data as described in section 7 – page 9. 3. Place the cylinder to be filled in an upright position on the platform. Ensure that the cylinder is free from any interference and keep hands clear of it. 4. Press the CONFIRM WEIGHT key. The system takes approximately two seconds to weigh the cylinder. The bottom display will briefly blank and then for one second the amount of gas that can be safely added to the cylinder is displayed. This weight is calculated from the WC data and the current weight of the cylinder and its contents. The display then blanks again briefly, followed by the live platform weight. A single "OK" beep will sound if the weight is successfully confirmed. If the weight is not correct an error beep (3 short beeps) will sound and an error message will be displayed for five seconds (see Section 13 – page 15). 5. Attach the hose to the cylinder, and open the cylinder valve. 6. Press the START FILL key. Ensure that the cylinder is free from any interference and keep hands clear of it. 7. When the FILLING light turns on, open the fill valve. When "START FILL" is pressed; • The weight of the cylinder, its contents and the weight of the fill valve, hose and fittings is TARED out. This operation takes about three seconds, during which time the bottom display shows " - - - ". If the platform is not stable or the weight is less than the "confirmed weight" an error beep occurs and an error message will be displayed for five seconds (see Section 13 - page15). The filling operation will be stopped until the error is corrected, and START FILL is pressed again. If OK a single "OK" beep will sound, and, • The weight display goes to zero. • The NET light turns on. • The solenoid valve opens. • The main LPG pump starts (if required). 10 © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 The FILLING light turns on. After the fill valve is opened the cylinder starts to fill, and the weight of the gas dispensed is displayed on the bottom display and the cost of the gas is shown incrementing on the top display. It is important that the operator does not touch the cylinder or its fittings during filling to avoid affecting the measured weight, resulting in an incomplete filling operation. • • 8. • • • The STOP key may be pressed at any time to “HALT” the filling process. The solenoid valve is closes and the pump is stops. The current weight of LPG dispensed, and its price, remain live on the displays. The HALT light flashes at about a one second rate. This is the "HALT" state. 9. The START FILL key may be pressed again and, when the platform is stable, the filling operation will resume. If a pre-act value has been selected, when the weight of LPG dispensed is within this value of the maximum allowable weight, as calculated previously, the pump is switched off and the filling continues (slowly) by decanting. When the weight on the platform reaches (or passes) the maximum allowable figure: • The solenoid valve closes. • The displays remain live until the reading is stable. Then the FILLING light turns off, the FILL COMPLETE light turns on, and the displays freeze. It is important that the cylinder and hose remain free from interference until after the FILL COMPLETE light turns on as it is at this point the amount of LPG delivered is measured and is charged for. 10. Remove the filling hose from the cylinder. When this loss of weight is detected the top and middle displays show CHEC CYL prompting the operator to use the MAX F.W. key to check the maximum full weight of the cylinder. 11. Press the MAX F.W. key. While this key is pressed, the NET light turns off and the total cylinder weight (gross weight) is displayed on the bottom display for comparison with the Maximum Full Weight display (Centre Display). (This comparison is only valid if the hose has been removed.) If the actual weight exceeds the calculated MFW by 0.2kg, the top display shows OFILL and the beeper sounds If the Over fill message (OFILL) is displayed the cylinder should be checked and, if necessary, remedial action taken. The price and weight information is sent to the forecourt computer only after the MAX F.W. key is pressed. If the cylinder is removed before the MAX F.W. key is pressed, the keyboard beeper sounds continuously for 10 seconds or until the cylinder is returned to the platform and CHEC CYL is shown on the top and middle displays. The operator has 10 seconds in which to place the cylinder back on the platform and to perform the MAX F.W. test before an “incomplete delivery ” message is sent to the forecourt computer in place of the price and weight information. If, when the LPG pump turns off, the filling rate slows down so much that the final weight is not reached within a certain time, the solenoid valve will close and the FILL COMPLETE light © 2003 Kosel Industries / Doc 80112-20.MAN 11 AS575 Operators Manual will come on as described above. This time is set by the pre-act value (an engineering menu function) and is 6 seconds per 0.1kg of pre-act. The weight of the LPG supplied on the bottom display and its price on the top display remain frozen until one second after the cylinder is removed from the platform. MOVEMENT OF THE CYLINDER WHILE FILLING: If, during the filling, a loss of weight on the platform of more than 1kg, is detected the system will immediately halt - the HALT light will flash, the pump will turn off, and the solenoid valve will close. This is the "HALT" state: - the displays will remain live, showing the current weight and price. To resume filling, the START FILL key must be pressed and the indicator will then wait until the platform is stable before starting the pump and opening the solenoid valve and the filling operation continues. The filling operation can be completed by five methods: 1. Automatically, when the maximum allowable weight of LPG is dispensed. 2. By pressing the STOP key twice (the first press HALTs the filling). 3. Where communications exist with the forecourt computer, the computer can stop and complete the filling operation. 4. When the cost of sale on the top display exceeds $990.00. 5. When the rate of filling is below a preset minimum. After the filling has been completed, pressing the MAX F.W. key and the removal of the cylinder from the platform marks the end of the filling sequence. • The TARE is cancelled. (the NET light turns off) • The displays revert to their pre-filling state. NOTE: If, during filling or when in the HALT state, the weight on the platform is reduced to less than 50% of the CONFIRM WEIGHT value the filling operation is aborted; • • 12 Error is shown on the price (top) display and the error number 33 is shown in the middle display for five seconds and a "incomplete delivery" message is sent to the forecourt computer. © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 Decant Filling to Ullage Fixed Fee price and Pump Pressure not Permitted. This method is used when the entered WC is less than the threshold figure set by an engineering function (in NZ typically 5kg). DETAILED DESCRIPTION This filling method relies on the use of the ullage valve to indicate when the cylinder is correctly filled and uses the weighing system to check-weigh the filled cylinder and compare it with the calculated Maximum Full Weight. 1. Enter the EW from the cylinder data as described in section 7 – page 9. 2. Enter the WC from the cylinder data as described in section 7 – page 9.. 3. Press the CONFIRM WEIGHT key, the middle display will show FEE, the top display will show the fee price and the bottom display will show the live weight. Incorrect entries may cause an error message to be displayed (see Section 13 – page 15). 4. Place the cylinder to be filled in an upright position, either on or off the platform. 5. Attach the filling hose to the cylinder to be filled and open the cylinder valve. 6. Open the ullage valve. 7. Press the START FILL key. The solenoid valve will open. 8. Open the fill valve. The cylinder will start to fill. 9. When liquid escapes from the ullage valve, close the fill valve. 10. Close the ullage and cylinder valves. 11. Remove the hose. 12. Press STOP to complete this filling sequence. The solenoid valve will close. The displays prompt for the Max Full Weight test. 13. With the cylinder on the platform, press the MAX F.W. key to display the maximum allowable weight on the middle display for comparison with the actual gross weight on the bottom display. If the actual weight exceeds the calculated MFW by 0.2kg, the top display shows OFILL and the beeper sounds If the Over fill message (OFILL) is displayed the cylinder should be checked and remedial action taken if necessary Only after this test is the fee price sent to the forecourt computer. NOTE: If STOP is not pressed, within nominally 300 seconds of the last valid keyboard operation, (this figure is determined in engineering setup) the Empty Weight and Water Capacity data is cancelled, the solenoid valve is closed, and the fee price is sent to the forecourt computer. © 2003 Kosel Industries / Doc 80112-20.MAN 13 AS575 Operators Manual 9. Zero Before any filling operation begins the indicator must be checked for ZERO. i.e. the bottom weight display shows "00.0" and the ZERO LED indicator light is on. If there is any residual weight on the platform or ZERO drift in the system the indicator may display a reading other than 00.0. To set this back to zero press the ZERO key. A shift in ZERO of up to -0.5kg and +3.5kg from the original calibration point can be corrected for. An error message (error 38) is displayed if the scale does not read zero at least once between filling operations. ZERO 10. Last Sale Price After a filled cylinder has been removed from the platform and up until new Water Capacity or Empty Weight data is entered, the last sale price and weight can be displayed while pressing the 9/LAST SALE key. If the last cylinder was one under the 5kg (typical) Water Capacity threshold, the last price will be the current fee price. 9 LASTSALE 11. Totalisers Totaliser # 1 For recording total weight of LPG sold through valid transactions. When filling by weight (automatic filling), on completion of the fill, the weight of the LPG dispensed, as well as being sent to the forecourt computer, is added to a non – resetable Totaliser. This Totaliser has a maximum display of 99999kg after which it rolls over and continues from 0kg. Internally the total is accumulated in 0.1kg increments but displays only to the nearest 1kg. The total can be viewed on the top display at any time, except during a filling process, by pressing the "7" key. The total is not affected by turning the dispenser power off. 7 Totaliser # 2 For recording the total weight of LPG dispensed, including filling operations that are aborted before complete. When filling by weight (automatic filling), on completion of the fill and also if the cylinder is removed before "FILL COMPLETE" the weight of the LPG dispensed is added to a non-resettable Totaliser. This Totaliser has a maximum display of 99999kg after which it rolls over and continues from 0kg. Internally the total is accumulated in 0.1kg increments but displays only to the nearest 1kg. The total can be viewed on the top display at any time, except during a filling process, by pressing the "8" key. The total is not affected by turning the filling system power off. 8 14 © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 12. Pump Interlock An interlock from the LPG pump control will halt the filling operation if the main LPG pump is turned on during the decant filling stage. An interlock may be caused by another LPG dispenser in the system being activated. The HALT light will come on and the system will be in the "HALT" state. To resume filling, press the START FILL key only after the interlock signal has been removed i.e. when the main LPG pump is shut down. Pressing START FILL while the pump is running will have no effect, and an Error message will be displayed (see Section 13 – page 15). If desired, the filling operation can at this stage be completed simply by pressing the STOP key while in this "HALT" state. While the pump is on and the system is in the "HALT" state the HALT light will be on continuously. If the pump is turned off, the HALT light will flash at about a one second rate indicating that the filling operation can be resumed. 13. Error Messages The AS570 indicator, during normal operation and at power up runs a self checking program which monitors the performance of the system. If any of the parameters checked fall outside pre-determined limits, the indicator will display an error message and normal operation will be inhibited. In addition to the above self checking process, whenever an invalid keyboard operation occurs, or the data entered is incorrect, or the weight on the platform is such that correct filling cannot be accomplished an error message will appear for five seconds after which the system reverts to showing the live platform weight. An invalid or illegal key press is also accompanied by an "error beep" consisting of three short beeps from the on board speaker. The error messages consist of the word "Error" appearing on the top display, and an associated error number appears on the middle display. The bottom display will be blanked while the error message is visible. The code numbers and their associated error descriptions are listed as follows. Error No. 1 to 10 11 12 13 14 Description Engineering error messages that might occur only during calibration and Engineering setup Internal memory corruption. Gain error, the calibration has changed Internal power supply fault Internal electronic error If errors 11 to 13 occur the system cannot be operated until it has been serviced and re-calibrated by an authorised service agent. © 2003 Kosel Industries / Doc 80112-20.MAN 15 AS575 Operators Manual On pressing the CONFIRM WEIGHT key... Error No. 18 19 20 21 22 23 24 Description The WC data has not been entered The EW data has not been entered The calculated "Maximum Full Weight" figure is too large i.e. it exceeds 98.0 kg. The weight on the platform is not stable, this message occurs after a delay of 10 seconds The calculated amount of gas to dispense is too small i.e. less than minimum allowed. The weight on the platform is less than the EW figure entered. Filling is inhibited by the forecourt computer. On pressing the START FILL key... Error No. 25 26 27 28 29 30 Description Filling is inhibited by the forecourt computer. The weight on the platform has not been "confirmed". The weight on the platform is not stable, this message occurs after a delay of 10 seconds. The weight on the platform is less than the EW figure. The weight on the platform is over 5 kg more than the "confirmed weight". The weight on the platform is less than the "confirmed weight". While filling or in the "HALT" state... Error No. 31 32 33 34 35 16 Description The START FILL key is pressed while the system is "HALTED" because of the pump interlock. The START FILL key is pressed when the filling has been inhibited by the forecourt computer. The cylinder is removed from the platform. The START FILL key is pressed when the decant filling of a cylinder has been stopped by the forecourt computer. The START FILL key is pressed when the decant filling of a cylinder has been stopped by the pump interlock. © 2003 Kosel Industries / Doc 80112-20.MAN Operators Manual AS 575 When in the pre-filling state... Error No. 36 38 Description When the ZERO key is pressed and the shift from zero calibration is too large. The scale has not returned to ZERO after the last filling operation. While filling... Error No. 40 41 Description If after 10 seconds after pressing start fill, the filling rate is too slow, the system will display error 40 for 4 seconds then go into the HALT state. See also "error 41" If after restarting the filling after "error 40" the filling rate is still too slow, the filling is again stopped. This time all further filling is inhibited until a "release code" is entered via the keyboard at which point a "FILL COMPLETE" occurs and the amount of LPG dispensed (if any) is sent to the forecourt computer. Removing power from the unit will not release the inhibit function. See also "error 40" After Fill Complete… Error No. 42 Description The cylinder has been removed before pressing the MAX F.W. key. © 2003 Kosel Industries / Doc 80112-20.MAN 17