. Adam Equipment CBK-M SERIES Service Manual Software rev.: 4.07 & above ADAM EQUIPMENT CO. LTD. P.N. 9017, Rev.
© Adam Equipment Company 2007
CONTENTS 1.0 INTRODUCTION.......................................................................................................2 2.0 SPECIFICATIONS ....................................................................................................3 3.0 TROUBLESHOOTING ..............................................................................................4 4.0 ERROR CODES .......................................................................................................5 5.
1.0 INTRODUCTION • The CBK-M series of scales provide an accurate, fast and versatile general purpose weighing scales with counting, percent weighing and checkweighing functions. • CBK-M scales are kilogram only scales. • There are 4 models with capacities up to 30kg. • The scales have LEDs to indicate when a weight is below the low limit, between the limits or above the high limit next to the display.
2.0 SPECIFICATIONS CBK 3M CBK 6M CBK 15M CBK 30M Max 3000 g 6000 g 15000 g 30000 g d= 1g 2g 5g 10 g n= 3000 3000 3000 3000 Max 3kg 6kg 15kg 30 kg d= 0.001kg 0.002kg 0.005kg 0.01 kg Grams Kilograms OTHER SPECIFICATIONS Units of measure Interface Stabilisation Time Kg, g RS-232 bi-directional Interface NOTE: For Approved applications, CBK-M Scales do not come with the RS-232 interface.
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Off Centre Loading error Overload Stops not correct Obstruction under pan Battery will not charge Charging circuit failure Battery Failure Incorrect adapter (below 800 mA) Processor failure 4.0 ERROR CODES ERROR CODE DESCRIPTION POSSIBLE CAUSES Err 1* Time input Error Invalid time entry such as “268970” for the time format “H-m-S”. Err 2* Err 4 Date input Error 34th day of a month is an invalid entry.
5.0 CBK-M DESCRIPTION The CBK-M scales have an enclosure with all components mounted within it. To gain access to the components remove the 5 screws securing the cover to the base. The basic unit consists of: 9 9 9 9 9 9 9 Base Load Cell frame Power switch Main PCB assembly Battery Display PCB assembly Keypad All models of CBK-M are similar except the selection of load cells and the program.
gauges to consider. Normally without a load on the load cell all the resistances are the same. However when the load cell has a weight on it 2 of the strain gages will be in compression (A and D) and the resistance will decrease and 2 will be in tension (B and C) and their resistance will increase.
A method to check the basic function and integrity of a load cell can be done using a ohmmeter and voltmeter with up to a 10volt power supply. Before the load cell is connected to the power supply use the ohmmeter to measure the resistance between the wires. Typical resistance values are: +E to -E 410 ohms ±30 ohms +S to -S 350 ohms ± 2 ohms +E to +S or any other combination similar approximately 270 ohms.
The load cell can be tested while it is connected to the A/D converter circuit board, using the scale power supply for excitation voltage. TESTING LOAD CELLS IN THE SCALE The signal from the load cells is amplified by the circuits on the A/D circuit board. The signal needs to be amplified to make it acceptable for the A/D converter used. The CBK-M scales amplify the input by 200 and change the no load voltage to about +2.5V.
7.1 SECURITY SEALS To seal the scale a lead-wire seal can be used as shown below. The base has a metal pin that protrudes through the cover. The security seal may be threaded through this metal pin, making it impossible to remove the cover without damaging either the security seal or the enclosure. Metrology labels and additional security measures may be added to the scale as required by the national legislation.
8.0 FACTORY PARAMETERS The factory parameters are used performing the factory calibration, setting the capacity and other basic settings. To access these parameters place a jumper into the pins on the main PCB (marked as position J4) through a hole provided on the base of the scale. Turn the scale upside down. Remove the seal covering the hole to access the PCB. Place a jumper through the hole into the pins. If a jumper is not available, short the pins. Turn on the scale using the switch on the base.
The display will show the parameter number then the word describing the function. Press the [Tare] key to enter a parameter. Press the [Zero] key to exit the factory parameter section. Display will show “JP on”. Remove the jumper. The scale will return to weighing. When a parameter is entered by pressing the [Tare] key, the display will guide you through the parameter selected and the options available. The parameters available are: F1 F2 F3 F4 F5 F6 F7 F8 F9 8.
Suggested Calibration Weights: CBK 3M CBK 6M CBK 15M CBK 30M 8.2 Calibration weight 1 1 kg 2 kg 5 kg 10 kg Calibration Weight 2 2 kg 4 kg 10 kg 20 kg F2 -RESOLUTION NOTE: This value can not be changed for the CBK-M scales. 8.3 F3 – CAPACITY To enter this parameter, press the [Tare] key when “F3 CAP” is shown. The display will show the current capacity. Press the [Func] key to scroll through the options.
Press [Tare] to accept the displayed value and return to the parameter or press the [Zero] key to return to the parameter without changing the value. Then press [Func] to advance to the next parameter. 8.5 F5 -RE-ZERO RANGE To enter this parameter, press the [Tare] key when “F5 reZ” is shown. The display will show the current re-zero range. Press the [Func] key to scroll through the options.
8.7 F7 -A/D COUNT To enter this parameter, press the [Tare] key when “F7 Cnt” is shown. This parameter allows you to view the A/D counts from the internal A/D converter. This can be an aid to service. Press the [Tare] key to return to the PARAMETER menu. Typical value at zero is 30,000-90,000 (approx.) Typical value at full capacity is 500,000 (approx.) 8.8 F8 –ZERO This parameter allows the normal method of setting zero. To enter this parameter, press the [Tare] key when “F8 ZE M” is shown.
8.9 F9 –LOW VOLTAGE DETECTION This parameter allows detection of low voltage when the battery wears down. To enter this parameter, press the [Tare] key when “F9 Ld M” is shown. The display will show if the LVD Mode is set to on or oFF. Press the [Func] key to scroll through the options. Press [Tare] to accept the displayed value and return to the parameter or press the [Zero] key to return to the parameter without changing the value. Then press [Func] to advance to the first parameter.
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Adam Equipment ADAM EQUIPMENT, BOND AVENUE, DENBIGH EAST INDUSTRIAL ESTATE, MILTON KEYNES, MK1 1SW, U.K. Tel: (01908) 274545 Fax: (01908) 641339 Intl Tel: -44 1908 -274545 Intl Fax: -44 1908 641339 E-Mail Address: info@Adamequipment.co.
ADAM EQUIPMENT is an ISO 9001:2000 certified global company with more than 35 years experience in the production and sale of electronic weighing equipment. Adam products are predominantly designed for the Laboratory, Educational, Medical, retail and Industrial Segments.
