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CHAPTER 3 MAINTENANCE PROCEDURES

7000 Series T71 Indicators Service Manual

3-3

Ohaus Corporation www.ohaus.com

3.2.2 Closing the Enclosure

After all work has been completed inside the terminal, the enclosure must be snapped shut
properly to maintain its environmental integrity.

To properly close the terminal, follow these steps:

Position the front cover over the rear housing then gently press it down into place.

Press down firmly in each of the four corners of the front cover in sequence until each

corner clip snaps audibly snaps into place.

It is very important that each of the 4 corner clips have snapped into place. When pressing

down on the cover during installation, listen for the “click” sound of each clip engaging.

3.2.3 Main Printed Circuit Board (PCB) Replacement

1. Unplug the Indicator from the AC power source.

2. Open the enclosure as in 3.2.1 and locate the main PCBA.

3. Remove the 4 connections as shown below.

Figure 3-3 Location of the connections.

4. Locate and remove 4 screws securing the main PCBA from the top housing.

Содержание 7000 Series

Страница 1: ...SERVICE MANUAL 7000 Series T72XW Indicators T72XW Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000...

Страница 2: ......

Страница 3: ...e at the time of publication but Ohaus Corporation assumes no liability arising from the use or misuse of this material Reproduction of this material is strictly prohibited Material in this manual is...

Страница 4: ...Front Panel Key 1 10 1 8 Operation Terminal 1 11 1 8 1 Overview 1 11 1 8 2 Display Elements and Keypad Operation 1 11 1 8 3 Display Elements 1 11 1 8 4 Keypad Operation 1 13 1 8 5 Language Selection...

Страница 5: ...re 2 11 2 10 Backup to SD Memory Card 2 12 2 11 Restore From SD Memory Card 2 12 2 12 Master Reset 2 13 2 13 Updating Firmware 2 14 CHAPTER 3 MAINTENANCE PROCEDURES 3 1 Preventive Maintenance 3 1 3 1...

Страница 6: ...5 1 10 Inquiry of All Implemented MT SICS Commands B 7 B 15 2 l1 Inquiry of MT SCIS Level and MT SICS Versions B 8 B 15 3 Inquiry od Data B 9 B 15 4 Inquiry of SW Version B 9 B 15 5 Inquiry of Serial...

Страница 7: ...Information read only B 20 B 18 5 4 Terminal Commands write only B 22 B 18 5 5 Setup Scale read and write B 23 B 18 5 6 Setup Application read and write B 25 B 18 5 7 Setup Terminal read and write B...

Страница 8: ...g Contains an operational test segment display test performance tests and adjustments Chapter 5 Drawings and Parts Lists Contains exploded views of T72XW Indicators identifying all serviceable compone...

Страница 9: ...ools and Test Equipment List 1 Ohaus Scale Base 2 Load Cell Simulator optional 3 Computer with RS232 Interface 4 RS232 Interface cable 5 Data Printer for use with RS232 communications 6 ESD work stati...

Страница 10: ...0 load cells Display Backlit 240 x 96 dot graphic LCD including weight display weight units gross net indication and graphic symbols for motion and center of zero SmartTrac operator prompts and data e...

Страница 11: ...Variable Access Approvals Weights and Measures USA NTEP Class III 10 000d Canada Class III 10 000d Europe Class III 6000e OIML Class III 6000e Product Safety UL cUL CE Table 0 2 T72XW Power Consumptio...

Страница 12: ...e 1 2 The AC version of the T72XW terminal is designed to power up to ten 350 ohm load cells or a minimum resistance of approximately 35 ohms The battery version of the T72XW terminal is designed to p...

Страница 13: ...350 cells 30 100 91 300 152 500 35 10 350 cells 24 80 60 200 120 400 The T72XW terminal is designed to support both 2mV V and 3mV V load cells from the same circuitry A load cell output rating selecti...

Страница 14: ...ies which signal on the COM1 port Make the connections as necessary Terminal Signal TxD Transmit RS 232 RxD Receive RS 232 Gnd Logic Ground Figure 0 4 COM1 Port Signal An example of connecting via RS...

Страница 15: ...s changes to metrological parameters in setup This must be ON for approved applications This is true even if the Scale Approval parameter is selected as None in setup SW1 2 Master Reset Set in the ON...

Страница 16: ...g in the terminal and return all settings back to factory default values This process is described in the T72XW Technical Manual Chapter 4 Service and Maintenance 1 6 4 SD Card Installation The SD mem...

Страница 17: ...e and date and the status of the Digital I O can be displayed in this area when so configured in setup Below the system line is the weight display During normal basic weighing operation the T72XW term...

Страница 18: ...struction Manual 1 8 Operation Terminal 1 8 1 Overview This chapter provides information about the basic functionality of the T72XW terminal including display operation keypad functions and menu navig...

Страница 19: ...nput or output active Time and date Numeric Upper case alpha lower case alpha and Decimal data entry mode Decimal mode is available only in the template string entry screens Tare type and value indica...

Страница 20: ...out allowing the Key Timeout period to elapse cycles through the current option for that key For instance when the 4 key is pressed in mode the display cycles through g h and i The length of this time...

Страница 21: ...ta entry there To delete one or more figures press the CLEAR key Entering Alphanumeric Data To enter an alphabetic character 1 Press the SHIFT key to access the character type lower or upper case 2 Pr...

Страница 22: ...SWITCH UNITS Press to toggle between primary and secondary units as configured in setup at Scale Units ZERO Used to reset the displayed weight to Zero TARE Captures current weight as a tare value and...

Страница 23: ...ss the PRINT ENTER key in the Navigation Keypad to accept the item or selection in focus and move to the next display 1 8 5 Language Selection Depending on the terminal s language setup at Terminal Re...

Страница 24: ...ailed view of the Scale branch is shown in This view indicates all the parameters in the Scale branch Each of these setup parameters are described in this section If the metrology switch is in the app...

Страница 25: ...inearity adjustment and provides access to zero and span adjustments 1 9 1 GEO Code Enter the GEO code for the appropriate adjustment value for the current geographical location GEO codes are numbered...

Страница 26: ...ndependently of capturing zero To capture span 1 With focus on the Set Span label press ENTER The Capture Span setup screen displays 2 Enter the weight for test load 1 and test load 2 if linearity has...

Страница 27: ...ble number of counts with the captured span to confirm that the desired capacity is achievable If the potential exists to saturate the analog section before system capacity is reached the T72XW will d...

Страница 28: ...poration www ohaus com 1 10 Communication A detailed view of the Communication branch is shown in Figure 3 1 This view indicates all the parameters in the Communication branch Each of these setup para...

Страница 29: ...arameters for the COM1 serial port 1 10 3 Baud Use the Baud selection box to set the baud rate for the serial port Options are 300 1200 4800 19200 57600 600 2400 9600 38400 115200 1 10 4 Data Bits Use...

Страница 30: ...8 for the serial port 1 10 10 Parity Use the Parity selection box to set the parity to None Odd or Even for the serial port 1 10 11 Flow Control Use the Flow Control selection box to set the flow con...

Страница 31: ...ly by the network and become read only in the setup screens If disabled the IP address must manually be assigned in the following fields 1 10 17 IP Address Enter the IP address or view if DHCP Client...

Страница 32: ...rint information Enter the IP address using the numeric keypad 1 10 21 Server TCP Port Enter the Server TCP Port of the device on the network This is the port on the network device through which commu...

Страница 33: ...CHAPTER 1 GETTING STARTED Ohaus Corporation www ohaus com 1 26 7000 Series T72XW Indicator Service Manual...

Страница 34: ...Memory Card Master Reset Upgrading Firmware Table 2 1 Follow all directions step by step Make certain that the work area is clean and use care when handling components of the Indicator 2 2 Diagnostic...

Страница 35: ...Look for broken wires open connections or mis wiring Contact service representative No serial port communications Use serial diagnostics section of Maintenance block of setup to determine if the probl...

Страница 36: ...y change Err 0004 In multiple range mode programmed capacity for range 2 must be greater than the programmed capacity for range 1 Err 0005 Capacity value exceeds limit Err 0006 Calibration weight exce...

Страница 37: ...would result in a value too large to display exceeds zero range ZERO key pressed and weight is above capture range exceeds zero range ZERO key pressed and weight is below capture range illegal scale...

Страница 38: ...too small TARE key was pressed while weight was less than 1 display increment tare under zero TARE key was pressed while weight was below zero Coin cell voltage low Contact service 2 4 Troubleshooting...

Страница 39: ...ource If no AC power is present have a qualified electrician at the site restore power at the source After power is restored test the T72XW for correct operation 2 4 3 Problem Diagnosis The following...

Страница 40: ...Internal Diagnostics The T72XW terminal provides several internal diagnostic tools that are accessible in setup mode These tests are intended to assist in diagnosing whether a problem is internal or e...

Страница 41: ...key to exit the display Calibration Values Displays the current calibration values for the scale If these values are recorded after a scale calibration and the Main PCB is replaced in the future the...

Страница 42: ...ntinuing through 99 then starting over again Each transmission increments this number by one 3 Any data received during the serial test is displayed in the bottom part of the display to the right of t...

Страница 43: ...rst to remind the tester that the outputs can be turned on manually during this test so any control power to the discrete outputs should be removed THE DISCRETE OUTPUTS OF THE TERMINAL WILL BE MANUALL...

Страница 44: ...ted all outputs will be turned off again 2 9 System Backup and Restore The optional SD memory card provides a medium to store a setup file containing the terminal s configuration All setup parameters...

Страница 45: ...to the Start prompt on the display Press ENTER to begin the backup or press the LEFT navigation key to exit without saving 5 After pressing ENTER the terminal will indicate Working Please wait during...

Страница 46: ...e terminal will indicate Working Please wait During the backup and Restore complete when the restpre procedure is finished 2 12 Master Reset A hardware master reset restores all terminal setup paramet...

Страница 47: ...ted by the master reset and the original calibration will persist 5 Apply AC power During the power up sequence the display will indicate a warning message of WARNING MASTER RESET Press ENTER to conti...

Страница 48: ...locate the firmware under 7000 Series Indicator T72XW Service Service Tools 3 Change the file name to T72Xxxx where xxx can be number from 001 to 999 Example as below in the SD card Figure 2 9 Termina...

Страница 49: ...es T72XW Indicators Service Manual Figure 2 11 Under Setup folder select Maintenance Figure 2 12 Under Maintenance folder select Install SW Update Figure 2 13 Under Install SW Update File Name select...

Страница 50: ...Enter key the software update process will start Figure 2 14 Software updating 8 The terminal will re boot after the software update is completed At this stage kindly check the software version at the...

Страница 51: ...inal s finish Do not spray cleaner directly on the terminal Regular maintenance inspections and calibration by a qualified service technician are recommended The T72XW terminal is a rugged instrument...

Страница 52: ...panel and enclosure together gently push the screwdriver in toward the enclosure A pop sound is made when the cover clip is released Figure 3 1 Opening the Harsh Enclosure 2 Repeat Step 1 for the oth...

Страница 53: ...ess down firmly in each of the four corners of the front cover in sequence until each corner clip snaps audibly snaps into place 3 It is very important that each of the 4 corner clips have snapped int...

Страница 54: ...in PCBA to indicator top housing CAUTION When handling the PCB grasp it by the edges only Do not touch the foil side Static discharge may damage some components 5 Lift out the PCB 6 Carefully re posit...

Страница 55: ...emove the 2 screws securing the LCD display bracket from the indicator top housing as shown below picture Figure 3 5 Location of screws securing LCD display bracket 2 After that gently lift the LCD di...

Страница 56: ...LCD display 3 2 5 Membrane Switch Replacement 1 Open the indicator enclosure Follow steps 1 4 in Section 3 2 1 2 On the T72XW when removing the old Membrane Switch be sure to extract the plastic ribbo...

Страница 57: ...d on the main board as shown in Figure 3 9 The AC version of the T72XW terminal is designed to power up to ten 350 ohm load cells or a minimum resistance of approximately 35 ohms The battery version o...

Страница 58: ...eet 20 Gauge meters feet 16 Gauge meters feet 350 243 800 610 2000 1219 4000 87 4 350 cells 60 200 182 600 304 1000 43 8 350 cells 30 100 91 300 152 500 35 10 350 cells 24 80 60 200 120 400 The T72XW...

Страница 59: ...h Functions Notes SW1 1 Metrology Security Switch legal for trade When in the ON position this switch prohibits changes to metrological parameters in setup This must be ON for approved applications Th...

Страница 60: ...ioned ON and AC power is applied to the terminal a Master Reset function will be initiated This procedure will erase all programming in the terminal and return all settings back to factory default val...

Страница 61: ...een selected in setup under Scale Type Approval and that the Metrology security switch SW1 1 is in its ON position refer to Figure 3 11 and Table 3 2 5 With the front panel installed on the enclosure...

Страница 62: ...the field NOTE In all cases where a part is replaced the balance must be thoroughly checked after the replacement is made The balance MUST meet the parameters of all applicable specifications in this...

Страница 63: ...S LISTS DIAGRAMS Ohaus Corporation www ohaus com 5 2 7000 Series T72XW Indicators Service Manual 4 1 7000 SERIES T72XW INDICATOR HOUSING INTERNAL PARTS Figure 4 1 Series 7000 T72XW Indicator Housing I...

Страница 64: ...SING INTERNAL PARTS Drawing Item Part Number Description 1 30132175 SP Keyboard T72XW 2 30132166 SP Front Cover kit T72XW 3 30132169 SP Display Bracket T72XW 4 30132168 SP Display Backlight T72XW 5 30...

Страница 65: ...CHAPTER 4 PARTS LISTS DIAGRAMS Ohaus Corporation www ohaus com 5 4 7000 Series T72XW Indicators Service Manual...

Страница 66: ...he GEO code exit the setup menu tree DO NOT perform a normal calibration 4 The calibration has now been adjusted for the differences in gravity from the original site of calibration to the new site of...

Страница 67: ...0 9600 10660 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 15 6 17 0 7 6 6 5 5 4 4 3 3 2 2 17 10 19 2 7 7 6 6 5 5 4 4 3 3 2 19 2 20 45 8 7 7 6 6 5 5 4 4 3 3 20 45 22 22 8 8 7 7 6 6 5 5 4 4...

Страница 68: ...0 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 35 31 36 41 14 13 13 12 12 11 11 10 10 9 9 36 41 37 50 14 14 13 13 12 12 11 11 10 10 9 37 50 38 58 15 14 14 13 13 12 12 11 11 10 10 38 58 40 5 15...

Страница 69: ...0660 11730 48 58 50 6 20 19 19 18 18 17 17 16 16 15 15 50 6 51 13 20 20 19 19 18 18 17 17 16 16 15 51 13 52 22 21 20 20 19 19 18 18 17 17 16 16 52 22 53 31 21 21 20 20 19 19 18 18 17 17 16 53 31 54 41...

Страница 70: ...in Feet 0 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 24 66 24 67 57 27 26 26 25 25 24 24 23 23 22 22 67 57 69 35 27 27 26 26 25 25 24 2...

Страница 71: ...0 to 115 2K baud and a checksum character can also be configured when using one of the continuous output strings The T72XW terminal supports the following functions on the serial ports SICS level 0 an...

Страница 72: ...s configured in setup and can contain up to 25 fields of data The same template can be sent to both COM1 and COM2 if both ports are programmed for demand output It is also possible to send a different...

Страница 73: ...n and Line Feed are appended to the printout B 5 Standard Interface Command Set SICS Protocol The T72XW terminal supports the OHAUS CORPORTATION Standard Interface Command Set MT SICS which is divided...

Страница 74: ...examples shown in this section a space is represented as _ Each command must be terminated by CR LF 0Dxh 0Axh The characters CR and LF which can be input using the ENTER or RETURN key of most PC term...

Страница 75: ...suppressed with the exception of the zero to the left of the decimal point Unit Weight unit displayed CR Carriage Return 0Dxh LF Line Feed 0Axh Comment the CR and LF characters will not be shown in t...

Страница 76: ...ET Transmission error The terminal has received a faulty command such as a parity error EL Logical error The terminal cannot execute the received command CR Carriage return 0Dxh LF Line Feed 0Axh Com...

Страница 77: ...ppropriate response The following sections contain a detailed description of the command set in alphabetical order with the associated responses Commands and responses are terminated with CR and LF Th...

Страница 78: ...0 S command implemented I0_B_0_ SI Level 0 SI command implemented I0_B_0_ SIR Level 0 SIR command implemented I0_B_0_ Z Level 0 Z command implemented I0_B_0_ Level 0 command implemented I0_B_0_ SR Lev...

Страница 79: ...ersion all levels are specified even those only partially implemented B 15 3 I2 INQUIRY OF DATA Command I2 Response I2_A_ T72XW_Standard_50 00_kg T72XW Model number of terminal Standard Standard funct...

Страница 80: ...the content of the terminal serial number variable 301 as entered in setup B 15 6 S SEND STABLE WEIGHT VALUE Command S Response S_S_ _ _ _ _ 436 2_lb 436 2 stable displayed weight lb weight unit Respo...

Страница 81: ...nse to the command SI is the last internal weight value stable or dynamic before receipt of the SI command B 15 8 SIR SEND WEIGHT VALUE IMMEDIATELY AND REPEAT Command SIR Response S_S_ _ _ _ _ 436 2_l...

Страница 82: ...ting range exceeded Comments The calibrated zero point determined during calibration is not influenced by this command The terminal will wait for up to 3 seconds after receiving an Z command for no mo...

Страница 83: ...and understood not executable at present Response S_L Command understood invalid parameter Response S_ Terminal in overload range Response S_ Terminal in underload range Example Command SR_0 50_kg Sen...

Страница 84: ...be overwritten and replaced by the new preset tare weight value The terminal will wait for up to 3 seconds after receiving a T command for no motion If motion does not settle within this time the com...

Страница 85: ...d during motion may not be accurate The tare weight value is sent in the current units B17 Report In order to print reports of the Alibi memory totalization registers target table Checkweighing applic...

Страница 86: ...nitiate a transmission of the results out the port programmed as Reports Examples with two records are shown in Figure B 1 and Figure B 2 Figure B 1 40 Column Alibi Memory Print Example Figure B 2 80...

Страница 87: ...s The T72XW supports two commands Read and Write Some variables are read only and some can be both read and written A response is always sent after a Read request or a Write command If a valid format...

Страница 88: ...200 etc Each field in the block is separated with the symbol 5Eh If no data is to be changed in a specific field that field can be left empty no new data Block read request R index CR LF Read target b...

Страница 89: ...ays 3 characters Weight unit is included 002 Scale Status b0 0 gross mode 1 net mode This character is the same as status byte B in the continuous output string b1 0 positive weight 1 negative weight...

Страница 90: ...puts Status b0 Out 1 0 OFF 1 ON b1 Out 2 0 OFF 1 ON b2 Out 3 0 OFF 1 ON b3 Out 4 0 OFF 1 ON b4 b5 Always 0 b6 b7 Always 1 013 Target Status b0 Under target 0 OUT 1 IN b1 Over target 0 OUT 1 IN b2 In T...

Страница 91: ...W1 1 Master Reset b2 SW1 1 Flash Application Firmware b3 SW1 1 Master Reset incl Calibration b4 SW1 1 Factory Test Mode b5 SW1 1 Enter Setup b6 Always 1 026 Adjustment Status 0 Adjustment OK 1 Adjustm...

Страница 92: ...0 Turn DIO Output 1 OFF 1 Turn DIO Output 1 ON 033 Output 2 Control 0 Turn DIO Output 2 OFF 1 Turn DIO Output 2 ON 034 Output 3 Control 0 Turn DIO Output 3 OFF 1 Turn DIO Output 3 ON 035 Output 4 Cont...

Страница 93: ...3 Canada 4 OIML 5 USA 103 Certificate Manual entry 20 characters max 104 Unit 1 g 2 kg 3 lb 4 t 5 ton 105 Number of ranges 0 One range 1 2 ranges 106 Range 1 capacity Manual entry 107 Range 1 increme...

Страница 94: ...utton Zero 0 Disabled 1 2 2 20 117 Pushbutton Tare 0 Disabled 1 Enabled 118 Keyboard tare 0 Disabled 1 Enabled 119 Net Sign Correction 0 Disabled 1 Enabled 120 Auto tare 0 Disabled 1 Enabled 121 Tare...

Страница 95: ...nimum weight Manual entry 135 Print interlock 0 Disabled 1 Enabled 136 Auto Print 0 Disabled 1 Enabled 137 Reset type 0 Deviation 1 Return 138 Reset weight deviation mode Manual entry 139 Reset weight...

Страница 96: ...ommand 7 Tare 8 Unit switch 9 Zero 10 Start animal weigh 11 Start peak weigh 213 Input 2 Polarity 0 True 1 True 214 Input 2 Assignment Refer to values for 212 215 Output 1 Assignment 0 None 1 Center o...

Страница 97: ...0 Disabled 1 Enabled 231 Counting Application Display Line 1 0 Disabled 1 ID 2 Description 3 APW 232 Counting Application Display Line 2 0 Disabled 1 ID 2 Description 3 APW 233 Counting Application Me...

Страница 98: ...led 245 Over Under Display Mode 0 No Display 1 Actual Weight 2 Target Difference 246 Over Under Display Line 1 0 Disabled 1 ID 2 Description 3 Target Tolerance 4 Zone 247 SmartTrac 0 Disabled 1 Enable...

Страница 99: ...klight timeout 0 Always on 1 1 minute 2 5 minutes 3 10 minutes 4 Disabled 304 Auto off timer 0 Disabled 1 10 minutes 2 30 minutes 3 60 minutes 305 System line 0 Blank 1 Discrete I O 2 Time Date 3 DIO...

Страница 100: ...1 F code 317 Setup Language 0 English 1 F codes 318 Transaction counter 0 Disabled 1 Enabled 319 Edit counter 0 Disabled 1 Enabled 320 Next transaction Manual entry 321 Password Protect 0 Disabled 1 E...

Страница 101: ...Displayed Weight 5 End of Template 6 Gross Weight 7 ID 8 Net Weight 9 New Line 10 Scale Name 11 String 1 12 String 2 13 String 3 14 String 4 15 String 5 16 String 6 17 String 7 18 String 8 19 String...

Страница 102: ...es for 402 415 Template 8 added line feeds Manual entry 416 Output template 8 field content array Refer to values for 402 417 Template 9 added line feeds Manual entry 418 Output template 9 field conte...

Страница 103: ...ment 0 None 1 Continuous Output 2 Continuous Extended Output 3 Demand Output 4 Reports 5 SICS 6 Cont Multi 1 7 Cont Multi 2 437 COM2 template Refer to values for 434 438 COM2 Checksum Refer to values...

Страница 104: ...ty Refer to values for 446 451 COM2 Flow Control Refer to values for 447 452 COM2 Interface 0 RS232 1 RS485 453 COM2 Address Manual entry 454 Ethernet DHCP Client 0 Disabled 1 Enabled 455 Ethernet IP...

Страница 105: ...t span when linearity is enabled 603 Mid Test Load Counts Test load counts for mid point span when linearity is enabled 604 Span Test Load Test weight value for high span point 605 Span Test Load Coun...

Страница 106: ......

Страница 107: ...30244628 P N 30244628B SERVICE MANUAL 7000 SERIES T72XW INDICATORS...

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