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Instruction Manual

PRECISION 

Advanced

Electronic Balances
GT Series

Ohaus Corporation

29 Hanover Road

Florham Park NJ

07932-0900

Summary of Contents for GT 210

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Page 40: ...Instruction Manual PRECISION Advanced Electronic Balances GT Series Ohaus Corporation 29 Hanover Road Florham Park NJ 07932 0900...

Page 41: ...HARMFUL INTERFERENCE TO RADIO COMMUNICATIONS OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO COR RECT THE INTERFER...

Page 42: ...form Support 10 Model GT8000T Tower Assembly Installation 10 RS232 Interface 11 Hardware 11 Output Formats 11 RS232 Commands 11 OPERATION 14 Switch Functions 14 Symbols Used for Operation of the Balan...

Page 43: ...ghing 31 Parts Counting 31 Check Weighing 32 FillGuideTM 32 MENUS 33 MENU LOCK OUT PROTECTION 34 TYPE APPROVED BALANCE SEALING 36 CALIBRATION MENU 36 Calibration Menu Protection 36 Calaibration Masses...

Page 44: ...re 50 Good Laboratory Practices 51 Parts Counting Error 51 Check Weighing Options 51 Sample Displays 53 Animal Weighing Options 54 Fill Option 54 Time 56 Date 57 Lockswitch 58 List 59 Exit Setup Menu...

Page 45: ...6 Print Numeric Data Only 66 Time 66 Date 67 Reference 67 Difference 67 List 68 CARE AND MAINTENANCE 69 TROUBLESHOOTING 69 Error Codes List 70 SERVICE INFORMATION 72 REPLACEMENT PARTS 72 ACCESSORIES 7...

Page 46: ...itch prevents preset settings from being changed To prevent measurements from being affected by air currents a Draft Shield is mounted to the balance and is standard with Models GT210 GT410 and GT410D...

Page 47: ...humidity extremes These factors will affect displayed weight readings DO NOT DO NOT DO NOT DO NOT DO NOT install the balance Next to open windows or doors causing drafts or rapid temperature changes N...

Page 48: ...inside the balance as long present inside the balance as long present inside the balance as long present inside the balance as long as the power cord is connected as the power cord is connected as the...

Page 49: ...gh the holes in the Draft Shield into the balance Tighten both screws se curely Platform and Platform Support Platform and Platform Support Platform and Platform Support Platform and Platform Support...

Page 50: ...ed CRLF For example a tare command should appear as shown in the adjacent diagram Data output by the balance is always terminated with a car riage return line feed CRLF RS232 INTERFACE RS232 INTERFACE...

Page 51: ...n xM xM xM xM xM Places balance in mode x where x 1 to 13 see table If unit or mode is not already enabled command will be ignored RS232 COMMAND TABLE RS232 COMMAND TABLE RS232 COMMAND TABLE RS232 COM...

Page 52: ...bled balance will automatically switch to percent mode display x x x x x Downloads average piece weight x for parts counting mode x must be in grams Command is ignored if parts counting mode is disabl...

Page 53: ...and it completes its checks and is calibrated it can be used to weigh or tare materials without setting the menus There are many features and functions in the GT Balance and if you do not address all...

Page 54: ...MULTIPLE PRESS MULTIPLE PRESS MULTIPLE PRESS PRESS AND HOLD FOR DESIRED DISPLAY PRESS AND HOLD FOR DESIRED DISPLAY PRESS AND HOLD FOR DESIRED DISPLAY PRESS AND HOLD FOR DESIRED DISPLAY PRESS AND HOLD...

Page 55: ...by using the button will eventually return to the beginning of the menu RULES Use RULES Use RULES Use RULES Use RULES Use button to advance button to advance button to advance button to advance button...

Page 56: ...14 14 14 14 High Point High Point High Point High Point High Point 26 26 26 26 26 46 46 46 46 46 15 15 15 15 15 Custom Units Custom Units Custom Units Custom Units Custom Units 50 50 50 50 50 49 49 49...

Page 57: ...onnect the power cord to a suitable power source The balance signals one long beep to indicate power has been ap plied 2 NOTE NOTE NOTE NOTE NOTE The display check countdown appears only in the first...

Page 58: ...Moveable FineRangeTM feature When the weight of the object on the platform exceeds the capacity limit of the Moveable FineRangeTM the balance will automatically change to the coarse range until eithe...

Page 59: ...e container must weigh at least 100 times the readability of the balance ie GT4K x 0 1 or 10 grams 2 the display blanks until stable weight readings are received then indicates zero The container s we...

Page 60: ...ner on the pan if one will be used 3 This is the current reference percentage NOTE NOTE NOTE NOTE NOTE The reference percentage can be changed to any value from 5 to 100 4 increments to NOTE NOTE NOTE...

Page 61: ...t this can be changed to 10 20 30 40 50 or 100 parts by Larger samples yield more accurate results Add the required number of sample pieces to the platform 3 indicates 5 pieces 4 If Add X is displayed...

Page 62: ...go to step 7 2 Place a sample weight on the pan which is considered to be the under limit for check weighing 3 4 Place a sample weight on the pan which is considered to be the over weight limit for ch...

Page 63: ...isplays the actual weight of the subject with flashing unit indicator and returns to after approximately six sec onds Repeat steps 1 through 4 for another subject or to start another weighing cycle NO...

Page 64: ...o establish the weight value Both methods are used to establish a reference for a 100 bar graph reading Target parameter provides two choices one is fill to the reference weight The other option sets...

Page 65: ...y enabled only enabled only when High Point Function is selected under the Setup menu Refer to page 46 High point is a feature which permits a number of samples to be weighed with the balance storing...

Page 66: ...he normal weighing mode 6 22 95 1 00 30 PM Printing Data Printing Data Printing Data Printing Data Printing Data Printing data to an external computer or printer requires that the communications param...

Page 67: ...d of examining which parameters are set up in the bal ance The parameters do not show up on the display but print out when selected Both the Setup and Print menus have a List function When LIST is dis...

Page 68: ...out Linearity Calibration Printout Linearity Calibration Printout When performing a Linearity calibration with GLP on a printout is automatically made after the calibration mass is placed on the platf...

Page 69: ...bility indicator S S S S S on the display to show 3 appears and the printer outputs the first sample weight 4 Remove the first sample 5 Place the second sample on the platform wait for the stability i...

Page 70: ...Parts Counting Parts Counting Parts Counting Parts Counting Parts Counting When the balance is in a Parts Count ing mode each time a batch of items are counted they can be recorded statistically by p...

Page 71: ...By accessing the Custom Units sub menu Density settings can be in Milliliter Liters Fluid Ounces or Quarts Use the procedure described in Sampling to obtain data by pressing each time a sample is weig...

Page 72: ...andardDev Mean Sum High Low Difference End Statistics Net Auto Tare Custom Units Factor Density End GLP Time BAL ID ID Proj Cal Name End GLP1 PRINT RESET Yes No COMMUNICATION Baud 300 1200 2400 2400 2...

Page 73: ...m support 3 Remove the two 2 cover screws and tilt the cover towards the right side of the balance 4 The menu Lockswitch is located on the front of the PC board The OFF position is to the left facing...

Page 74: ...atform and Platform Support 1 Pass the wire through the Security Screw and the lances on the Plate as shown in the illustration NOTE NOTE NOTE NOTE NOTE On balances with a draft shield both sides of t...

Page 75: ...he balance can be calibrated using a mass of known value by entering that value into the balance Cal Cal Cal Cal Cal Test Test Test Test Test allows the stored calibration data to be tested against th...

Page 76: ...not disturb the balance when C is displayed when C is displayed when C is displayed when C is displayed when C is displayed Linearity Calibration Linearity Calibration Linearity Calibration Linearity...

Page 77: ...ch the value of the selected calibration mass The number entered must be at least 25 of the full span value 8 After the last digit has been accepted 9 10 Place calibration mass on the platform 11 The...

Page 78: ...eset does not appear if menu has been locked out AL specifies the averaging level STB specifies the desired stability range Auto Zero sets the automatic zero threshold Beep when set on provides audibl...

Page 79: ...Averaging level compensates for vibration or excessive air currents Factory default setting is shown in bold type AL 0 reduced stability fastest stabilization time AL 1 normal stability normal stabili...

Page 80: ...d weight is within 5 divisions Stb 1 d Reduced range Stb 2 d Normal range Stb 5 d Largest range stability indicator is ON even though displayed weight changes slightly When the RS232 interface is conf...

Page 81: ...in Menu Double short beep Indicates that the beep cannot be disabled Exiting User Menu Exiting User Menu Exiting User Menu Exiting User Menu Exiting User Menu To exit the User menu and store settings...

Page 82: ...sw LIST END Setup SETUP OPTIONS Cont Custom Units Unit 3 Factor Mantissa Enter Exponent 3 2 1 0 0 0 0 0 1 2 3 LSD 5 1 1 1 1 1 2 5 10 100 Density none none none none none l ml fl oz qt End GLP Time Dat...

Page 83: ...d out NOTES NOTES NOTES NOTES NOTES 1 DefaultsettingsoftheLockswitchmenu only appear if the hardware Lock out switch is set to the locked position 2 Functionrelatedoptionsshowninitailics in the table...

Page 84: ...re listed in table The default setting is shown in bold type NOTE NOTE NOTE NOTE NOTE If Taels is enabled see next page before exiting the menu Weighing Units Weighing Units Weighing Units Weighing Un...

Page 85: ...none none none Only one one one one one function at a time can be selected for balance operation Selection of a function other than None or Percent requires additional selections to that function be r...

Page 86: ...le Mean Sum High Low and Difference readings Each can be individually set ON or OFF 1 Access menu 2 3 Enable allows the statistics feature to be turned off without losing the individual settings progr...

Page 87: ...ith which it had previously been weighed Gross Weight Gross Weight Gross Weight Gross Weight Gross Weight the weight of object or sample Net Weight including container or packaging NOTE NOTE NOTE NOTE...

Page 88: ...999 1 999999 of 10 of 10 of 10 of 10 of 10 tissa tissa tissa tissa tissa Exp Exp Exp Exp Exp 123 4 1234 x 1000 1234 x 103 12 34 1234 x 100 1234 x 102 1 234 1234 x 10 1234 x 101 1234 1234 x 1 1234 x 10...

Page 89: ...uid by measuring the volume by weight If the Factor is the density of a liquid the approp riate unit of volume can be selected for printing 14 15 Selecting NONE disables the volumetric units 16 NOTE N...

Page 90: ...ust be entered in the Print GLP submenu before printed data is available Since all of the settings for the GLP submenu are done in a similiar manner only one example is shown 1 Access the submenu unde...

Page 91: ...ons Check Weighing Options Check Weighing Options Check Weighing is enabled only when the Check Weighing Function is selected This feature may be used for check weighing or package weight control in a...

Page 92: ...ollows using a reference weight of 50 grams The over limit was set at 55 grams and the lower limit was set at 45 grams SAMPLE DISPLAYS SAMPLE DISPLAYS SAMPLE DISPLAYS SAMPLE DISPLAYS SAMPLE DISPLAYS W...

Page 93: ...fore starting the Check Weighing option must have been selected under the Functions submenu 1 Access the submenu under the Setup Options sub menu 2 reference 3 reference weight 4 If REF WT is selected...

Page 94: ...ed sensitivity 4 5 6 Fill Option Fill Option Fill Option Fill Option Fill Option Fill Option provides two choices for a reference weight similar to check weighing Either a mass can be placed on the pl...

Page 95: ...n the pan 8 9 or When zero is selected the balance indicates the weight as a negative number after the reference is set in the main menu When an object is placed on the balance that weighs exactly wha...

Page 96: ...te Date Date Date Date is a feature which enables the balance to be set to a U S A date standard or European date standard U S standard has the month date followed by the year each separated by in the...

Page 97: ...on Calibration Calibration User Setup User Setup User Setup User Setup User Setup and Print Print Print Print Print menus can be individually locked on or off by selecting the appropriate menu and the...

Page 98: ...alance must be connected to a computer or printer 1 Access the submenu under the Setup or Print menus 2 The display indicates a series of dots traveling right to left when the balance is sending infor...

Page 99: ...shown in italics in the print menu below appear only if the appropriate Functions are turned on Shaded areas only appear in the menu if the appropraite options are selected in the Setup menu Items sh...

Page 100: ...Limit 0 Stable data Only OFF Numeric Data Only OFF Time OFF Date OFF Reference OFF Difference OFF 1 2 3 4 5 or 6 If is selected the balance signals a double short beep double short beep double short...

Page 101: ...default setting is 2400 baud To view or change the baud rate 1 Access the submenu 2 3 Normal baud rate is 2400 4 Data Bits Data Bits Data Bits Data Bits Data Bits To set the number of data bits to 7 o...

Page 102: ...entered into the balance the identification number and project number are available when printing The reason the entries are made under the Print submenu is that when legal for trade operation LFT is...

Page 103: ...Access the submenu 2 3 or 4 NOTE NOTE NOTE NOTE NOTE If you select interval to automatically output data at user specified time intervals the interval is entered in the Initialize submenu which follow...

Page 104: ...ter the last digit is entered is displayed again 12 for the high limit 13 indicates current high end value 14 Repeat steps 8 through 10 to change the numbers as required 15 After the last digit is ent...

Page 105: ...is set ON allows the balance to output the current time to the printer To set the Time feature ON or OFF proceed as follows 1 Access the submenu under the Print Options menu 2 3 or 4 Print Numeric Dat...

Page 106: ...is set ON allows the balance to output the current date to the printer To set the Date feature ON or OFF proceed as follows 1 Access the submenu under the Print Options menu 2 3 or 4 NOTE NOTE NOTE N...

Page 107: ...ll menu settings for the User Setup and Print menus will be output either to an external printer or computer To use this feature your balance must be connected to a computer or printer 1 Access the su...

Page 108: ...ation on table surface SYMPTOM Unit will not turn on Incorrect weight reading Cannot display weight in desired unit or cannot access desired weighing mode Unable to store menu settings changes RS232 i...

Page 109: ...rate with correct weights RS232 Errors RS232 Errors RS232 Errors RS232 Errors RS232 Errors 4 0 Bad RS232 frame Check RS232 menu parameters and correct 4 4 RS232 buffer is full if installed May occur i...

Page 110: ...calibration checksum If error persists have the balance serviced 9 6 Bad mode checksum Turn the balance off using the front panel controls If the error persists have the balance serviced 9 7 Invalid...

Page 111: ...45 220 240 V 160 AT 90167 42 ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES Description Ohaus Part No Calibration Masses ASTM Class 1 Tolerance Calibration Masses ASTM Class 1 Tolerance...

Page 112: ...unit Functions percent parts counting check weighing animal weighing FillGuideTM high point Options GLP statistics net gross auto tare volume determination time date lockswitch LFT U S type approved R...

Page 113: ...1 custom unit Functions percent parts counting check weighing animal weighing FillGuideTM high point Options GLP statistics net gross auto tare volume determination time date lockswitch LFT U S type...

Page 114: ...radioactive or corrosive materials has foreign material penetrating to the inside of the product or as a result of service or modification by other than Ohaus The warranty period shall begin at the d...

Page 115: ...76 Ohaus Corporation 29 Hanover Road Florham Park NJ 07932 USA Tel 973 377 9000 Fax 973 593 0359 With offices worldwide P N 76769 16 R1095 Ohaus Corporation 1995 all rights reserved...

Page 116: ...mary menu the first parameter in that submenu is RESET To access each of the remaining parameters simply press once for each parameter Repeated pressing of cycles through all of the parameters SET BAL...

Page 117: ...n in their respective menus in the manual Shaded areas only appear in the menu if the appropriate function or weighing unit is selected in the Setup menu SETUP OPTIONS Cont PC Error CW Option Referenc...

Page 118: ...LEMENT Preface Preface Preface Preface Preface This supplement is intended to be used in conjunction with the Precision Advanced Electronic Balances GT Series Instruction Manual Unless otherwise speci...

Page 119: ...for service Draft Shield Draft Shield Draft Shield Draft Shield Draft Shield To install the Draft Shield 1 Remove the two existing screws and washers located on top of the bal ance 2 Position the Dra...

Page 120: ...Repeatability 0 001 Std dev g Linearity g 0 002 Tare range Full Capacity by Subtraction Stabilization time 2 seconds Sensitivity drift 4 ppm C 10 30 C Operating 50 to 104 F 10 to 40 C Non type approve...

Page 121: ...ill be available to help you REPLACEMENT PARTS REPLACEMENT PARTS REPLACEMENT PARTS REPLACEMENT PARTS REPLACEMENT PARTS Description Ohaus Part No In Service Cover Kit 76901 00 In Service Cover Plate 76...

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