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GRAPHTEC GL820, Service Manual

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GRAPHTEC GL820 Service Manual Download Page 4

GL820-UM-251-9370 

ii

TO ENSURE SAFETY

This Service Manual has been compiled for the purpose of facilitating repair and maintenance of the GL820 
midi LOGGER by Graphtec service personnel and other persons who have undergone equivalent technical 
training.
Maintenance or repair by unauthorized service personnel is to be strictly avoided. Because the GL820 
contains numerous internal components with a high electric potential, such work by unauthorized service 
personnel could cause human injury or serious damage to the GL820 midi LOGGER.

Summary of Contents for GL820

Page 1: ...midi LOGGER SERVICE MANUAL 820 GL820 UM 251 GL820 UM 251 02 9370 ...

Page 2: ......

Page 3: ...GL820 UM 251 9370 i HISTORY OF REVISIONS No Date issued Description of revision Page Edition 1 10 02 18 First Printing All 01 2 10 04 06 The size of screws were corrected 3 5 3 8 02 3 4 5 ...

Page 4: ...c service personnel and other persons who have undergone equivalent technical training Maintenance or repair by unauthorized service personnel is to be strictly avoided Because the GL820 contains numerous internal components with a high electric potential such work by unauthorized service personnel could cause human injury or serious damage to the GL820 midi LOGGER ...

Page 5: ...acing the AMP Board 3 8 4 SETUP PROCEDURES 4 1 4 1 Entering the System Setup Menu 4 1 4 2 AC Line cycle Setting 4 3 4 3 Performing Setup1 Voltage Input 4 4 4 4 Performing Setup2 Room Temperature Compensation 4 8 4 5 Performing Setup3 RTD 4 12 5 INSPECTION AND CHECK PROCEDURES 5 1 5 1 Preparations for inspections 5 1 5 1 1 AC Line Setting 5 1 5 1 2 Sampling setting 5 1 5 1 3 Copy the condition sett...

Page 6: ...7 Block Diagram 7 1 7 1 Main Unit Power Block Main Control 7 1 7 2 Main Control Block 7 2 7 3 AMP Block 7 3 7 3 Details of the AMP 7 4 ...

Page 7: ...Description Logic Alarm cable B 513 DC Drive Cable B 514 Same as GL200 450 500 Battery Pack B 517 Same as GL200 450 500 Humidity Sensor B 530 Same as GL200 450 500 Extended Terminal Base Unit B 537 Option 20 Ch Extended Terminal Unit B 538 Option Rod shaped K type thermocouple RIC 410 K type thermocouple for static surfaces RIC 420 L shaped K type thermocouple for static surfaces RIC 430 ...

Page 8: ...GL820 UM 251 9370 1 2 1 CONFIGURATION ...

Page 9: ...turn off the power during upgrading the firmware 2 2 How to Upgrade the GL820 Flash ROM from the USB memory device Preparations for the upgrade Firmware MainVerxxxRevxxxxAxx GL820 Main Program file for GL820 PatternVerxxxRevxxxxAxx GL820 Font file for GL820 1 Connect the AC adapter for the GL820 2 Turn on the GL820 3 Copy the two files to a USB memory device from the computer Copy the two main pro...

Page 10: ...row direction key 3 Press ENTER key to execute the upgrade 4 Wait until the display shown below appears or until the beeper sound stops Note Don t turn off the GL820 until this process is finished The following message will appear on the GL820 display in yellow characters when the upgrade is complete Also the beeper will sound for 5 seconds Please Turn Off the Power I have locked up ...

Page 11: ...370 2 3 5 Turn off the power to the GL820 when the above message is displayed or when the beeper sound stops 6 Delete the two program files from a USB memory device This is to avoid upgrading the firmware by mistake ...

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Page 13: ...ng disassembly disconnect the cables from the specified connectors as necessary During reassembly double check to ensure that the proper cables have been correctly re connected to the pertinent connectors Some areas of the control panel unit possess a high electrical potential so exercise caution to avoid an electrical shock ...

Page 14: ...ve the input terminal unit as shown in the picture below Pull the terminal unit out towards the direction indicated by the arrow while pressing the two locks at the bottom of the unit 1 Press the two locks in the direction indicated by arrows 2 Pull the unit out towards the direction indicated by the arrow ...

Page 15: ...BLY 3 3 Removing the Side Pads Disassembly 1 Peel off the left and right side pads from the main unit Right side pad Left side pad Main unit Re assembly 1 Push the left and right side pads against the main unit and then install them on the main unit ...

Page 16: ...ads from the main unit See Section 3 4 3 Remove the four M2L8 self tapping screws from the bottom cover 4 Disconnect the connector between the main control board and the AMP board and then remove the top cover assembly M2L8 self tapping screw Top cover assembly Bottom case assembly Re assembly 1 Re assemble the top cover assembly and the bottom case assembly in the reverse order in which they were...

Page 17: ...Section 3 4 4 Disconnect the LCD flexible cable from the main control board 5 Remove the two M2L6 self tapping screws holding the main control board from the top cover assembly 6 Disconnect the connector between the main control board and the control panel board and then remove the top cover assembly M2L6 self tapping screw LED flexible cable Main control board Top cover assembly Core Fixing tape ...

Page 18: ...ee Section 3 4 3 Remove the main control board See Section 3 5 4 Remove the two M2L6 self tapping screws holding the LCD bracket and then detach the LCD bracket 5 Remove the four M2L6 self tapping screws holding the control panel board 6 Remove the control panel board from the top cover assembly M2L6 self tapping screw Top cover assembly Control panel board M2L6 self tapping screw LCD bracket Re a...

Page 19: ...nal unit from the main unit See Section 3 2 2 Remove the side pads from the main unit See Section 3 3 3 Disassemble the top cover assembly and the bottom case assembly See Section 3 4 3 Remove the main control board See Section 3 5 4 Remove the key pad from the top cover assembly Key pad LCD bracket Top cover assembly with LCD Control panel board Re assembly 1 Re assemble the LCD and the top cover...

Page 20: ...screws holding the AMP board from the bottom case assembly 5 Detach the AMP board from the bottom case assembly 6 Remove the two M2 6L6 binding head screws holding the terminal unit connector cover 7 Detach the terminal unit connector cover from the AMP board M2L6 self tapping screw Bottom case assembly AMP board Terminal unit connector cover M2 6L6 binding head screw Re assembly 1 Re assemble the...

Page 21: ...UBLE ARROW Direction key 10 times in order to display the Setup menu shown below 3 Move the cursor to the Mode position using the Direction keys 4 Press the ENTER key to display the menu from which you can execute the various Setup operations Setup mode Setup1 Basic Setup2 Room temp Setup3 RTD temp 5 Select the Setup mode using the Direction keys and then press the ENTER key ...

Page 22: ...GL820 UM 251 9370 4 2 4 SETUP PROCEDURES 6 Move the cursor to the Execute Setup position as shown below 7 Press the ENTER key to start the selected Setup operation ...

Page 23: ... of your AC line before you perform the Setup operations How to set the AC line cycle 1 Press the MENU key until the OTHR menu shown below appears 2 Move the cursor to the AC Line cycle position using the Direction keys 3 Press the ENTER key to display the AC Line cycle selection menu shown below 4 Select the appropriate cycle for your AC line ...

Page 24: ...ve a voltage generator on hand that can output voltage up to 50 VDC four digit output Mutually connect the ground terminals of the voltage generator and the GL820 Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line Wiring connection 0 00000 V Voltage generator FG GND AC adapter Connect to CH1 Input cable Connect both ends to GND ...

Page 25: ...CH1 input terminal 2 Leave the GL820 turned on for at least 30 minutes And leave the GL820 turned on for at least 10 minutes after wiring 3 After entering the System Setup mode open the Setup menu as shown below Specify the AMP Setup conditions as shown below Mode Setup1 Basic CH CH 1 4 Move the cursor to the Execute Setup position as shown below ...

Page 26: ... generator s output voltage setting to correspond to one of the displayed voltage ranges in the following table and then input that voltage to the GL820 Message Input Voltage GND 0 000 mV 20 mV 20 000 mV 50 mV 50 000 mV 100 mV 100 000 mV 200 mV 200 000 mV 500 mV 500 000 mV 1 V 1 000 V 2 V 2 000 V 5 V 5 000 V 10 V 10 000 V 20 V 20 000 V 50 V 50 000 V 9 Repeat step 8 by sequentially setting the Meas...

Page 27: ...for 50 V the EEPROM ENTER message appears Press the ENTER key to begin writing the new Setup data to the EEPROM Message 11 After the setup parameters have been registered to the EEPROM the display closes and returns to normal mode 12 Turn off the GL820 This completes the voltage amp setup ...

Page 28: ...er Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line Wiring connection T compensation lead K compensation lead T input side T output side 0 C reference temperature device Zero Controller K input side K output side Input 0 V for the output side or short the and terminals AC adapter Connect the GND terminals Connect T compensation lead to the CH1 CH6 CH11 and CH16 ...

Page 29: ...s 2 Leave the GL820 turned on for at least 30 minutes And leave the GL820 turned on for at least 10 minutes after wiring 3 After entering the System Setup mode open the Setup menu as shown below Specify the AMP Setup conditions as shown below Mode Setup2 Room temp Sensor Sensor1 Area Area1 CH CH 1 4 Move the cursor to the Execute Setup position as shown below ...

Page 30: ...mp START message is displayed at the location shown above 7 Press the START key and then wait until the EEPROM ENTER message appears Message 8 Press the ENTER key to begin writing the new Setup data to the EEPROM 9 After the setup parameters have been registered to the EEPROM the display closes and returns to normal mode ...

Page 31: ...he AMP Setup conditions as shown below Mode Setup2 Room temp Sensor Sensor1 Area Area2 CH CH 1 11 Repeat steps 4 to 8 for all the areas up to Area 4 12 Turn off the GL820 This completes the Room temp setup Setup flow for the Room temp Procedure Selected area 1 Area 1 2 Area 2 3 Area 3 4 Area 4 ...

Page 32: ...esistors 0 Ω Short 350 Ω 0 01 2500 Ω 0 01 As shown below use reference resistors to connect the CH20 Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line Wiring connection b Reference resistors 1 0 Ω Short 2 350 Ω 0 01 3 2500 Ω 0 01 AC adapter Connect to the CH20 input terminals Connect to the GND ...

Page 33: ...terminals 2 Leave the GL820 turned on for at least 30 minutes And leave the GL820 turned on for at least 10 minutes after wiring 3 After entering the System Setup mode open the Setup menu as shown below Specify the AMP Setup conditions as shown below Mode Setup3 RTD temp CH CH 20 4 Move the cursor to the Execute Setup position as shown below ...

Page 34: ...ppears Replace the reference resistor to correspond to one of the displayed resistors in the following table and then press the START key Message Reference resistor 0 ohm 0 Ω 350 ohm 350 Ω 2500 ohm 2500 Ω 9 Repeat step 8 by sequentially to 350 Ω and 2500 Ω 10 The EEPROM ENTER message appears when the 2500 ohm setup was completed Message 11 Press the ENTER key to begin writing the new Setup data to...

Page 35: ...GL820 UM 251 9370 4 15 4 SETUP PROCEDURES 13 Turn off the GL820 This completes the RTD temp setup ...

Page 36: ......

Page 37: ...e Section 4 2 5 1 2 Sampling setting 1 Set the Sampling setting of the GL820 to at least 1 sec or longer 5 1 3 Copy the condition settings file Condition settings files GL820ConditionVolt CND Condition settings for Voltage accuracy GL820ConditionTC CND Condition settings for T and K range accuracy GL820ConditionPT CND Condition settings for PT range accuracy 1 Copy the condition settings file to a...

Page 38: ...OCEDURES 5 1 4 How to load the condition settings file to the GL820 from a USB memory device 1 Connect the USB memory device to the GL820 2 Press the FILE key to display the menu below 3 Move the cursor to the Load position using the Direction keys ...

Page 39: ... PROCEDURES 4 Press the ENTER key to display the menu below 5 Move the cursor to the File Name position using the Direction keys 6 Press the ENTER key to display the menu shown below 7 Move the cursor to the USB1 position using the Direction keys ...

Page 40: ...the Left Arrow Direction key to display files as shown below 9 Specify the condition settings file to execute the various inspection operations by using the DOWN Arrow Direction key or the UP Arrow Direction key 10 Press the ENTER key to display the menu shown below ...

Page 41: ... PROCEDURES 11 Move the cursor to the OK position using the Direction keys 12 Press the ENTER key to display the menu below 13 Move the cursor to the OK position using the Direction keys 14 Press the ENTER key to load the condition settings file ...

Page 42: ...20 prior to initiating measurement Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line Set the Sampling setting of the GL820 to at least 1 sec or longer Wiring connection Same wiring connection as Setup1 See Setup1 procedure Setting procedure 1 Load the condition settings file GL820ConditionVolt CND from the USB memory device Measurement procedure 1 Press the MENU ...

Page 43: ...GL820 UM 251 9370 5 7 5 INSPECTION AND CHECK PROCEDURES 4 Press the DISPLAY key until the menu shown below appears 5 Press the Left DOUBLE Arrow key to display the menu shown below ...

Page 44: ...0 4 mV 499 5 mV to 500 5 mV 1 V 1 0000 V 0 9992 V to 1 0008 V 0 999 V to 1 001 V 2 V 2 0000 V 1 9984 V to 2 0016 V 1 998 V to 2 002 V 5 V 5 0000 V 4 996 V to 5 004 V 4 995 V to 5 005 V 10 V 10 0000 V 9 992 V to 10 008 V 9 99 V to 10 01 V 20 V 20 0000V 19 984 V to 20 016 V 19 98 V to 20 02 V 50 V 50 000 V 49 96 V to 50 04 V 49 95 V to 50 05 V This value will change when the reference voltage is inp...

Page 45: ...rocedure 1 Load the condition settings file GL820ConditionTC CND from the USB memory device Measurement procedure temperature accuracy 1 Short the input reference voltage signal for the 0 C reference temperature device zero controller according to the table below then check that the level of measurement is within the rating Input voltage precision ratings Type T Temperature Input voltage Factory R...

Page 46: ... Finished message is displayed and then display the values as shown below Message Confirm that this value is within the above ratings after data has been captured 6 Check that the level of measurement is within the above rating from the CH1 to the CH10 7 Press the CH GROUP key to display from the CH11 to the CH20 Confirm that this value is within the above ratings after data has been captured ...

Page 47: ...of the GL820 to the same cycle as that of your AC line Wiring connection Same wiring connection as Setup3 See Setup3 procedure Setting procedure 1 Load the condition settings file GL820ConditionPT CND from the USB memory device Measurement procedure RTD accuracy 1 Connect the reference resistor to the input terminals of channel 20 2 Press the DISPLAY key until the menu shown below appears 3 Press ...

Page 48: ...and then display the values as shown below Message Confirm that this value is within the below ratings after data has been captured 7 Check that the level of measurement is within below rating RTD precision ratings Range Input resistor Reference Temperature Factory Rating Product Rating Pt100 350 Ω 715 3 C 714 5 C to 716 1 C 714 3 C to 716 3 C Pt1000 2500 Ω 408 8 C 407 8 C to 409 2 C 408 0 C to 40...

Page 49: ...0701 AMP Board GL820 1 3 795800702 Control Panel Board 1 Same as GL800 4 795800710 AC Adapter JP with AC cable KSAH2400200T1M2 1 Japan 5 795800711 AC Adapter UL with AC cable KSAH2400200T1M2 1 UL 6 795800712 AC Adapter CEE with AC cable KSAH2400200T1M2 1 CEE 7 795800713 AC Adapter BS with AC cable KSAH2400200T1M2 1 BS 8 795800714 AC Adapter CCC with AC cable KSAH2400200T1M2 1 China ...

Page 50: ...STS 6 2 Parts Lists 6 2 1 Outer Casing No Part No Part Name Description Q ty Remarks Rank 1 795820703 Top Cover with LCD 1 A 2 795820704 Bottom Case 1 C 3 604810510 Left Side Pad 1 C 4 604810520 Right Side Pad 1 C Outer Casing 1 3 2 4 ...

Page 51: ...GL820 UM 251 9370 6 3 6 PARTS LISTS 6 2 2 Bottom Parts No Part No Part Name Description Q ty Remarks Rank 1 795820701 AMP Board 1 A 2 604810051 Cover Connector 1 C Bottom Parts 1 2 ...

Page 52: ...820700 Main Control Board with SD card 1 A 2 795800702 Control Panel Board 1 A 3 795820703 Top Cover with LCD 1 A 4 604820020 Bracket LCD 1 C 5 604810033 Key Pad 1 C 6 562500097 Core LCD Flexible Cable E04FG270712 1 C 7 690482010 Flexible Cable LCD FC RN8112 01 1 C Top Parts 3 4 2 1 5 6 Fixing tape for core 7 ...

Page 53: ... Switch AJ76231BF SW1 Power Switch 1 A 2 561550037 Connector HEC0470 01 640 JP14 DC Input 1 A 3 561500112 USB Type A Connector XM7A 0442 J7 USB Connector 1 A 4 561500082 USB Type B Connector XM7B 0442 J8 USB Connector 1 A 5 561550041 LAN Connector TM11R 5M2 88 LP J9 LAN Connector 1 A 6 562070001 Backup Battery ML2130 TT BAT1 Backup Battery 1 A ...

Page 54: ...04220030 Cover Battery 1 C 2 795820704 Bottom Case 1 C Bottom Case 2 1 6 2 5 Terminal Unit No Part No Part Name Description Q ty Remarks Rank 1 795800707 Terminal Unit 1 A 2 795800705 Terminal Base 1 A 3 795800706 Terminal Base Plate Including 4 screws 1 A 4 795800708 Terminal Base Extension Cable 1 A 2 1 4 3 ...

Page 55: ...ual 1 English B 604829030 GL820 UM 801 Quick Start Manual 1 Japanese B 3 795800710 AC Adapter JP with AC cable KSAH2400200T1M2 1 Japan A 4 795800711 AC Adapter UL with AC cable KSAH2400200T1M2 1 UL A 5 795800712 AC Adapter CEE with AC cable KSAH2400200T1M2 1 CEE A 6 795800713 AC Adapter BS with AC cable KSAH2400200T1M2 1 BS A 7 795800714 AC Adapter CCC with AC cable KSAH2400200T1M2 1 China A ...

Page 56: ......

Page 57: ...r J15 To Battery1 AMP Board RN8113 02 J301 J6 KEY Board RN6062 03 J501 J401 J502 J402 Y A L E R d r a o B 4 0 2 6 0 6 N R TERMINAL Board RN6062 05 3 0 4 J J201 J16 To Battery2 J205 POWER SW Main Control Board RN8113 01 J203 J13 SW J14 J15 AMP Board RN8113 02 J301 J6 KEY Board RN6062 03 J501 J401 J502 J402 RELAY Board RN6062 04 J403 J202 J16 J205 To Humidity Sensor To Battery1 To Battery2 TERMINAL ...

Page 58: ...Main Control Block BAT1 Secondary circuit Main Control Block Main Control Board RN8113 01 J3 J4 LCD1 FLASH WRITE J5 LCD FFC BL J7 USB to FLASH MEMORY J8 J9 USB LAN to PC J203 J13 AMP Board RN8113 02 J204 Logic Alarm Pulse Ext Trig J2 FPGA WRITE ...

Page 59: ... Control Signal Input Circuit Signal Input Circuit Secondary Circuit Amp Board RN8113 02 Signal Input Circuit Signal Input Circuit Signal Input Circuit Signal Input Circuit Signal Input Circuit Signal Input Circuit Signal Input Circuit Signal Input Circuit 1ch 2ch 19ch 20ch J504 1ch 2ch 19ch 20ch J505 J502 J402 J403 J201 J401 J203 J13 RN8113 01 b 1ch b 2ch b 19ch b 20ch ...

Page 60: ... Photo MOS Relay Constant Current 1mA Attenuator Selector Selector AMP AMP AMP AMP AMP AMP A D TLP113 DC 5V DC 5V DC 24V AMP DC DC AIC1660CS DC DC DCP010505BP U Isolating Isolating Decoder b b Terminal Board RN6062 06 RN6062 04 RN8113 02 Relay Board AMP Board Secondary Circuit Main Control Board RN8113 01 AC Adaptor Photocoupler ...

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