Operating Instructions TX-1 Series Digital Wire / Filament Tension Meter

Transcription

1 Operating Instructins TX-1 Series Digital Wire / Filament Tensin Meter TX-1 Series Instrument pg. 1

2 TABLE OF CONTENTS 1. WARRANTY POLICY SPECIFICATIONS SAFETY AND MAINTENANCE INSTRUMENT Descriptin... 5 Add-On Optins... 6 Features f all Instruments BASIC OPERATION... 7 Charging Instrument Batteries... 7 Quick Start Instructins... 8 Engaging Instrument nt material DISPLAY SCREEN SETUP Screen LCD Refresh Rate Data Averaging Cal Analg (Optinal feature) Cal Length (Optinal feature) Custm Names Reslutin Length Units (Optinal feature) Re-Cal Tensin: See descriptin at the end f this bklet Audi Backlight Set-Pint Menu Versin DATA LOGGING Screen TENSION UNITS Screen SELECT MATERIAL Screen LENGTH Screen SPEED Screen TX-1 Series Instrument pg. 2

3 7. ADVANCED OPERATION General Calibratin Precautins Check Accuracy Calibrate Instrument Prprietary Ntice This dcument cntains prprietary infrmatin which may nt be reprduced in whle r in part withut the written permissin f Tensitrn, 733 Suth Bwen Street, Lngmnt, CO Tensitrn reserves the right t make instrument changes and imprvements which may nt be reflected in this dcument. Prtins f this dcument may have been updated t include the latest hardware r firmware versin, if applicable. We recmmend that this dcument be read in its entirety befre any attempt is made t perate the instrument. Thank Yu... Fr purchasing anther fine prduct frm Tensitrn If yu have any questins r need assistance, please call us at r find us nline at 1. WARRANTY POLICY STANDARD EQUIPMENT WARRANTY Tensitrn warrants that all Tensitrn-manufactured equipment will be free f any defect in materials r wrkmanship fr the perid f (1) year. Warranty begins frm the date f shipment frm a Tensitrn facility. The warranty is extended t custmers and applies t all Tensitrn-manufactured equipment purchased, installed, and used fr the purpse fr which such equipment was riginally designed. The abve warranties cver nly defects arising under nrmal use and d nt include malfunctins r failures resulting frm misuse, abuse, neglect, alteratin, prblems with electrical pwer, usage nt in accrdance with prduct instructins, acts f nature, r imprper installatin r repairs made by anyne ther than Tensitrn r a Tensitrnauthrized, third-party service prvider. Shipping csts t and frm Tensitrn are nt included in the warranty cverage. TX-1 Series Instrument pg. 3

4 2. SPECIFICATIONS Figure 1: TX-1 Dimensins Full Scale Accuracy Fr all mdels up thrugh 5000 grams: 1% Accuracy fr custm calibratins is material specific Pwer Requirements Fr Instrument Input: 9 VDC 2.2A Fr AC Adapter: V~50-60Hz 0.48A Pwer Supply perates with input vltages frm V and includes several interchangeable adapters allwing use with Eurpean, U.S., Australian, British, and ther plug cnfiguratins. Battery: Rechargeable NiMH, custm prprietary design Battery Life Apprximately 12 hurs depending n backlighting intensity Operating Temperature 32º F t 120 º F If these values are exceeded, battery charge/discharge rates will decline. Hwever, this culd be ffset by using the pwer supply. Charging in direct sunlight r near a heat surce will nt prduce a full charge and may permanently damage battery pack. Strage Temperature 20º F t 158º F (instrument and charger) Ambient Humidity 10% t 90% nn-cndensing Dimensins All mdels withut cylindrical rllers: 2.31 x 3.17 x 7.10 All mdels with cylindrical rllers: 2.31 x 3.70 x 7.10 (See Figure 1.) Weight.75 lb. (depending n instrument cnfiguratin) Envirnment: Indr r utdr use, dust-free envirnment TX-1 Series Instrument pg. 4

5 3. SAFETY AND MAINTENANCE WARNING: When using crdless, electrnic instruments, always fllw basic safety precautins t reduce the risk f fire, electric shck, r persnal injury USE ONLY A TENSITRON POWER SUPPLY TO AVOID DAMAGE TO INSTRUMENT. READ AND SAVE ALL INSTRUCTIONS. Befre using this meter, make sure all users read and understand this manual, as well as any labels packaged with the instrument. Knw yur instrument. Read this manual carefully t learn yur tensin meter s applicatins and limitatins, as well as ptential hazards. Avid dangerus envirnments. D nt use yur instrument in explsive atmspheres (gaseus fumes, dust r flammable materials). D nt submerge yur instrument in liquids. Use the right tl r instrument. D nt use this instrument t d a jb fr which it is nt recmmended. Guard against electric shck. Inspect instrument befre use. Check fr any binding f mving parts, imprper muntings, brken parts, and any ther cnditin that may affect peratin. D nt use a damaged instrument. Tag damaged instrument DO NOT USE until repaired. Fr repair, send instruments directly t Tensitrn. Maintain instrument carefully. Keep instrument dry, clean, and free frm il and grease. D nt lubricate. All rller bearings are sealed. D nt use instrument if it has received a sharp blw r been drpped r damaged. D nt disassemble. Incrrect reassembly may result in damage t the instrument and risk f electric shck and fire. If instrument is damaged return it t Tensitrn fr repair. WARNING: Only use battery pack assemblies prvided by Tensitrn with yur meter. Other types f batteries might explde, causing persnal injury and damage. Unplug charger when nt in use. Tensitrn recmmends calibratin by the manufacturer at ne-year intervals, r sner if meter is wrn, damaged, r reading incrrectly Hwever, it is user s respnsibility t establish a suitable calibratin interval, cnsidering user s accuracy requirements, requirements set by cntract r regulatin, and envirnmental factrs such as frequency and cnditins f the meter s use. 4. INSTRUMENT DESCRIPTION Standard Instruments Mdel Material Selectin (Wire / Filaments) Reslutin (grams) Range (grams) TX t 54 AWG r finer /.0002 t.0044 Filaments TX AWG r finer /.002 t.008 Filaments TX AWG r finer /.02 t.120 Filaments 0.1 r r r TX-5EDM-1 EDM Wires (.10,.15,.20,.25, &.30mm) 5 r TX-1 Series Instrument pg. 5

6 Add-On Optins Instruments can be cnfigured with any f the ptins belw. Meters can be equipped with either A r E, but nt bth. - R Custm Rller ptin Chse frm numerus sizes f cylindrical, flanged r U-shaped rllers. - S Speed and Length ptin Indicate real-time speed in FPM r MPM. Maximum measurable speed is 9,999 FPM r 9,999 meters per minute. (Nte: Line speeds exceeding 2,000 FPM are generally unsafe fr hand-held applicatins.) Read length measured up t 9,999 meters. - A Analg Output ptin Fr bth speed and tensin values. 0-5 VDC f 4-20mA with sftware definable ending sequences. Data utput at 40 Hz. Prvided with 10 cable t interface with yur receiving device. - E RS-232 Serial Output ptin Select data sampling rate frm 1, 2 r 5 Hz. Prvided with 10 cable t interface with yur receiving device. Features f all Instruments Large, easy-t-read, clr display with adjustable backlighting. Display shws tensin, material selected, minimum and maximum tensin values, and a dynamic clr bar graph that indicates changing tensins and battery charge levels. Select tensin values t display in grams, lbs, Newtns r cn (cn nly available n TX series instruments). Instrument includes calibratins fr numerus wires and filaments. Extremely accurate custm calibratin using up t a 10-pint linear calibratin prcedure. All calibratins are passwrd prtected. Chse yur calibratin by first highlighting and selecting the material (Wire, Filaments r Custm). Next define material size using chices such as AWG, inches r mm and push Enter. The instrument autmatically adjusts t the calibratin yu ve selected with a full-scale accuracy f +/- 1%. Nte: Full-scale accuracy fr custm calibratins is material-specific. Adjustable LCD refresh rates allwing fr stable, digital readuts. Autmatic shutff after several minutes f nn-use. Instruments may be perated cntinuusly while cnnected t pwer supply. Data Lgging: Select either Cntinuus r Single Pint data lgging mde and recrd tensin r (ptinal) speed values t the instrument memry. Data Averaging: Stabilizes yur displayed tensin readings. This feature calculates and displays a rlling average f the readings taken ver a userdefined time perid. Optins are: 1, 2, 5, r 10 secnds. (Only the readings taken in the mst recent perid will be averaged and displayed.) Data Statistics: Mnitr yur prcess by viewing cunt, average, minimum/maximum, and standard deviatin values f yur lgged data. TX-1 Series Instrument pg. 6

7 Set-Pint feature: allws user t specify high and lw tensin pints which are then shwn n the main display as an active, clr-changing bar graph. Rechargeable NiMH batteries with pwer supply prvided. Apprximately 12 hurs f cntinuus use depending n backlighting intensity. Pwer supply perates with input vltages frm V and includes several interchangeable adapters allwing use with Eurpean, Australian, US, British, and ther plug cnfiguratins. Optinal features, including: Custm Rllers, Speed and Length mnitring, Analg Output r Serial Output. Optinal magnetic r rigid Munting Bracket. All mdels typically available frm stck. Numerus applicatin-specific mdels available. Durable, lightweight carrying case with prtective fam inserts. (See Figure 2.) All instruments are factry-calibrated and ready t use. Calibratin certificate is included. All calibratin values are traceable t Natinal Standards. Figure 2: Carrying case with instrument, calibratin certificate, pwer supply (charger), adapters and perating instructins. 5. BASIC OPERATION Charging Instrument Batteries 1. Use nly a Tensitrn pwer supply t avid damage t instrument. 2. Cnnect pwer supply cable t the instrument. Plug the pwer supply int a pwer surce with input vltages between VAC. 3. A full charge f the battery assembly requires several hurs f charging. 4. The battery pack assembly cannt be vercharged. 5. The instrument will remain n while cnnected t its pwer supply. 6. The battery charge level is indicated in upper, right-hand crner f display. TX-1 Series Instrument pg. 7

8 Quick Start Instructins 1. Pwer the unit n by pressing ON buttn. Main display will indicate: Tensin, Material, Min and Max tensin readings. (See Figure 3.) 2. Select a screen: a. Mve between screens by using the up ( ) and dwn ( ) buttns. b. Make r enter a selectin by pressing the Enter/Zer buttn. c. Exit a setting by pressing the Escape (ESC) buttn. Instrument Operatin Panel Main Display Operatin Buttns: Off / Escape On / Enter / Zer Arrw Up Arrw Dwn Stre Battery Charge Level Main Display Selectable Units in grams, lbs, Newtns r cn (TX-125 nly). Set Pint Display Select material Size Instrument autmatically adjusts calibratin Figure 3: Instrument Operatin Panel and Display Stre and Display up t 5 separate tensin measurements and their Average. 3. Lg Data: a. Press the STORE buttn t stre tensin readings alng with the Minimum and Maximum f these values. b. Clear the data displayed n the Main Screen by pressing and hlding the STORE buttn, r pwer the instrument ff. c. Fr additinal infrmatin n lgging and viewing data, refer t Sec 6 - Display Screens - Data Lgging. 4. Read Tensin: Variatins in materials affect tensin readings. It is essential t select the crrect material and size befre use, r tensin values may be incrrect. 5. Select Tensin Units: a. Using the up r dwn arrws, scrll t TENSION UNITS, then press ENTER. TX-1 Series Instrument pg. 8

9 b. Next, select frm: Grams, Newtns, r LBS, and then press ENTER. 6. Select material: a. Using the up r dwn arrws, scrll t SELECT MATERIAL, then press ENTER. b. Next select yur material frm: Wire, Filaments r Custm and press ENTER. Next select yur material size (diameter) in AWG (fr wires), Inches, mm r descriptin fr Custm entries and then ENTER yur selectin. (See Figure 4.) c. If yur specific material is nt listed, add it t the menu by fllwing the calibratin instructins included at the end f these instructins. Or, send a 15 sample f yur material and the instrument t Tensitrn and ask t have it added t the menu. Select material and then Size Instrument autmatically adjusts calibratin Figure 4: Select Material Screen 7. Zer Instrument: Hld the instrument in the attitude yur reading will be taken befre yu engage it t the tensined material. Then, press ZERO. Engaging Instrument nt material WARNING: DO NOT EXCEED THE MAXIMUM TENSION RANGE OF THE INSTRUMENT OR DAMAGE WILL OCCUR. Engage the Instrument nt the tensined material by separating the rllers (squeeze the trigger assembly) and inserting yur material between the fixed rller and the tw rllers n the trigger assembly. (See Figure 5.) Once the material is in line with the three rllers, slwly release the trigger until it makes a full stp. Nte tensin reading (See Figure 6.) Trigger and Guide Plate Nte the ruting f the material. Pull Trigger and engage instrument nt material Figure 5: Instrument ready t engage Nte the ruting f the Cable. Once material is prperly ruted, gently release the Trigger until it stps int the engaged psitin. Figure 6: Instrument engaged nt material TX-1 Series Instrument pg. 9

10 6. DISPLAY SCREEN SETUP Screen LCD Refresh Rate T either speed up r slw dwn the instrument s LCD refresh rates: Scrll t SETUP and press ENTER. Scrll t LCD REFRESH RATE and press ENTER. Enter yur preference: 1, 2 r 5 Hz and press ENTER. Nte: This feature is unrelated t Data Averaging. Data Averaging Use this feature t adjust the stability f yur displayed tensin readings. It allws users t select the duratin the meter takes tensin readings ver befre averaging all f the readings and psting that average t the display. The meter takes ~300 readings per secnd, s if a 1 secnd duratin is selected, the meter will average all 300 readings befre psting the average f thse readings t the display. Likewise, if a 10-secnd duratin is selected, the meter will average all 3000 readings befre psting the average f thse 3000 readings t the display. Optins are: 1, 2, 5 and 10 secnds. This is a rlling average, meaning that nly the readings taken in the last 1, 2, 5 r 10 secnds (yur chice) will be averaged and displayed. Nte: This feature is primarily used in prcesses where the material t be checked is cnstantly mving, such as cil winding and textiles. Cal Analg (Optinal feature) Use this feature t calibrate the Analg Out ptin by hanging the weight specified n the screen then entering that numeric value n yur Signal Cnditiner (fllw the instructins with yur signal cnditiner) Scrll t SETUP and press ENTER. Scrll t CAL ANALOG and press ENTER. Using the up and dwn arrws adjust the display t indicate the value at which the instrument shuld utput maximum Vltage r current. Then press ENTER. Cal Length (Optinal feature) Use this feature t calibrate the Length measurement ptin f yur instrument. Scrll t SETUP and press ENTER. Scrll t CAL LENGTH and press ENTER. Next, using a precise 20-ft length f yur material (20.0 ), thread ne end thrugh the instrument s three rllers and slwly pull exactly 20.0 thrugh the instrument. NOTE: The material must be under tensin t make gd cntact with the rllers n the instrument. Then press ENTER. Custm Names Custm calibratins, listed as Custm 0 9, can be renamed s yur material appears as a selectin n the Main Display. T rename a Custm Calibratin: Scrll t SETUP and press ENTER. Scrll t CUSTOM NAMES and press ENTER. TX-1 Series Instrument pg. 10

11 Scrll t the descriptin t rename and press ENTER. Input yur custm name by using the up and dwn arrws t select each number, letter, r character, fllwed each time by ENTER. Cntinue pressing ENTER until all spaces in the descriptin have values, including blank spaces. Once yur new name has been entered yu will autmatically be returned t the SETUP screen. Reslutin T either increase r decrease the Reslutin f the tensin readings: Scrll t SETUP and press ENTER. Scrll t RESOLUTION and press ENTER. Select yur preference: 5 r 10 Grams fr the Mdel TX-5000 series, 1 r 5 Grams fr the TX-1000 series, r 0.1 t 1 Grams fr the TX- 125 series. Then press ENTER. Length Units (Optinal feature) Use this feature t select the unit fr measuring length. Scrll t SETUP and press ENTER. Scrll t Length Units and press ENTER. Select yur preference: Meters r Feet, and press ENTER. Re-Cal Tensin: See descriptin at the end f this bklet. Audi ONLY PERFORM THIS IF YOU ARE A QUALIFIED CALIBRATION HOUSE USING NIST-CERTIFIED CALIBRATION WEIGHTS. NOT USED FOR CHECKING ACCURACY. TO CHECK ACCURACY, REFER TO SEC. 7: CHECK ACCURACY. T turn the Beep ON r OFF: Scrll t SETUP and press ENTER. Scrll t AUDIO and press ENTER. Select ON r OFF and press ENTER. Backlight T adjust the visual intensity f the LCD screen: Scrll t SETUP and press ENTER. Scrll t BACKLIGHT and press ENTER Select Lw, Medium r Full intensity and press ENTER. Set-Pint Menu This feature displays tensin as a clred bar n the main display. The clred bar advances as tensin increases, and retracts as tensin decreases. Yu can define a safe perating tensin range. Fr tensin measurements within this range, the bar is green. Belw the range, the bar is amber. Abve the range, the bar is red. T adjust the Set Pint Menu: Scrll t SETUP and press ENTER. Scrll t SETPOINT MENU and press ENTER. TX-1 Series Instrument pg. 11

12 Fllw and enter the prmpts t turn this feature n r ff, r t edit yur high and lw values. (See Figure 7.) Versin Set Pint Setup Screen See High and Lw threshld values Settings: On / Off Edit High Pint Threshld Edit High Pint Threshld Figure 7: Setpint Setup Press this buttn t determine the instrument s mdel and what level f firmware is dwnladed t the instrument. DATA LOGGING Screen Each time the instrument s STORE buttn is pressed, a lg f that material tensin will be stred in memry fr later review. Lgging Rate (when lgging Cntinuus Data) T adjust the rate at which the tensin readings are lgged: Scrll t DATA LOGGING and press ENTER. Scrll t LOGGING RATE and press ENTER Select 1, 2, r 5 Hz and press ENTER. Duratin (when lgging Cntinuus Data) T adjust the duratin that tensin readings are lgged: Scrll t DATA LOGGING and press ENTER. Scrll t DURATION and press ENTER Use the Up and Dwn arrws t change the Duratin that yu want data stred and press ENTER. (Minimum: 10 secnds; Maximum: 100 secnds) Select Mde T change the mde that tensin readings are lgged: Scrll t DATA LOGGING and press ENTER. Scrll t SELECT MODE and press ENTER Use the Up and Dwn arrws t select either CONTINUOUS r SINGLE POINT data cllectin. View Data Stats This feature allws the peratr t view the basic statistics f the lgged data (Cunt, Average, Min/Max, and Standard Deviatin). (See Figure 8.) Data Statistics Screen See the Cunt, Average, Minimum/Maximum, and Standard Deviatin f the lgged data. Figure 8: Data Statistics Screen TX-1 Series Instrument pg. 12

13 View Data Lg When data is lgged t the instrument memry, that data and the statistics f that data lg (Cunt, Average, Minimum/Maximum, and Standard Deviatin) can be seen under the Data Lgging / View Data Stats screen. T view this lgged data: Scrll t DATA LOGGING and press ENTER. Scrll t VIEW DATA LOG and press ENTER. Clear Single Pint Lg T clear stred data, scrll t CLEAR SINGLE PT LOG, press ENTER, and fllw the prmpts. TENSION UNITS Screen T change the unit f measure in which tensin readings are lgged: Scrll t Tensin Units and press ENTER. Use the Up and Dwn arrws t Grams, Newtns and Punds (CentiNewtns n TX-125 nly) and press ENTER. SELECT MATERIAL Screen Press ENTER while this display is shwn t shw the available ptins fr material types. The ptins are Wires, Filaments and Custm. Use the up r dwn arrw t scrll t the ptin yu want and press ENTER t select it. Select Material Wire Units This feature allws the peratr t select the unit fr describing diameter f wire t be measured fr tensin: AWG, Inches r mm. Select Material Filaments Units This feature allws the peratr t select the unit fr describing diameter f filaments t be measured fr tensin: Inches r mm. Select Material Custm Units This feature allws the peratr t select the unit fr describing diameter f the custm material t be measured fr tensin. Fr Custm, the peratr inputs the ptins fr units. Use the up and dwn arrws t scrll thrugh all the available alpha-numeric symbls and press ENTER t chse that symbl. LENGTH Screen Scrll dwn t this screen t view the length that has traveled thrugh the meter since enabled (r reset), measuring up t 9,999 meters. The units f measure will be shwn in meters r feet. (These units are designated in the Setup screen under Length Units). SPEED Screen Scrll dwn t this screen t view the speed at which the material is passing thrugh the meter at that instant. The meter will als stre the Minimum and Maximum speeds lgged. The units f measure will be shwn in Meters/Minute r Feet/Minute. (These units are designated in the Setup screen under Length Units). Maximum measurable speed is 9,999 FPM r 9,999 meters per minute. Nte: line speeds exceeding 2,000 FPM are generally unsafe fr hand-held applicatins. TX-1 Series Instrument pg. 13

14 7. ADVANCED OPERATION General Calibratin Precautins 1. T verify accuracy r t calibrate yur instrument, hang a sample length f material vertically, and suspend knwn weight(s) frm the ppsite end. (See Figure 9.) 2. When perfrming this test, use a micrmeter t measure yur material diameter and verify it is dimensinally within tlerance and nt ut f rund. 3. Only use free-hanging weights which are traceable t Natinal Standards. 4. Never use any tensining device that attempts t cnvert rtatinal trque values int tensin lads, as these types f systems are highly inaccurate. Als, any lad cell system must be rutinely checked fr accuracy using traceable weights, as these types f systems are als highly inaccurate and generally d nt meet minimum repeatable accuracy standards. Check Accuracy 1. T check the accuracy f yur meter, first hang the test material and suspend weights frm it as described in General Calibratin Precautins abve. 2. Select frm yur meter s menu the material type and material diameter crrespnding t yur test material. 3. Befre engaging the instrument nt the material, zer the instrument by hlding it in the same attitude yu ll be taking the readings, and pressing the Enter r Zer buttn. This will eliminate any small tare effects. 4. Take readings alng the material. FOR BEST RESULTS ALWAYS TAKE SEVERAL READINGS OF THE MATERIAL TENSION BY DISENGAGING AND THEN RE- ENGAGING THE INSTRUMENT ON THE MATERIAL. 5. If the meter is accurately calibrated, readings will fall within 1% f the fullscale capability f the instrument: TX-125-1: +/- 1.3 grams TX : +/- 10 grams TX : +/- 50 grams If yu have additinal questins, please cntact Tensitrn fr assistance. Figure 9: Free Hanging Weight simulating cable tensin. TX-1 Series Instrument pg. 14

15 Calibrate Instrument *IMPORTANT: THIS FEATURE SHOULD ONLY BE USED BY A CALIBRATION FACILITY USING CERTIFIED AND TRACEABLE DEAD WEIGHTS. DO NOT USE THIS FEATURE FOR A SIMPLE ACCURACY CHECK. NOTE 1: TX-1 instruments are calibrated fr Wire and Filaments thrugh a factry prcess nt available t users. Use the calibratin prcedure belw t add r change a calibratin in the CUSTOM menu. NOTE 2: When calibrating yur TX-1 instrument, tensin values must be entered in grams. 1. T add r change a calibratin in the CUSTOM menu f yur TX-1 meter, first hang the material fr the calibratin as described in General Calibratin Precautins abve. (Yu will suspend the weights later in the prcess.) 2. Access the setup menu: Turn n yur meter and press the DOWN ARROW until SETUP is highlighted, then press ENTER. 3. If there isn t yet a CUSTOM NAME in the menu fr the material, then add ne as fllws: Scrll dwn until CUSTOM NAMES is highlighted, and press ENTER. Scrll dwn t CUSTOM1 (r t the next available CUSTOM entry), and press ENTER. Using a cmbinatin f the UP, DOWN and ENTER buttns, key in a name fr yur custm material. 4. Add r change the calibratin fr yur CUSTOM material: Press the ESCAPE buttn until nly SETUP is shwing, and press ENTER. Scrll dwn t RE-CAL TENSION, and press ENTER Enter passwrd. Yu may btain the passwrd by ing service@tensitrn.cm. Scrll up r dwn t select the CUSTOM NAME fr the material want t calibrate, and press ENTER. Enter the number f calibratin pints yu will be using (at least five, and n mre than ten). Zer cunts as the first pint. ENTER WEIGHT fr each data pint: Zer is the first value and is already prgrammed. Each successive data pint shuld be a higher weight than the previus ne. Data pints are typically distributed evenly alng the tensin range. (Example: With 5 data pints fr 1000 grams, use 0, 200, 400, 600 and 800.) When the display reads Zer Unit, hld the instrument (NOT engaged n the material) in the attitude that yu plan t d the calibratin (likely hrizntal). Then, press ZERO. As the display prmpts yu, suspend the crrect weight frm yur material. Then clamp the instrument n the material and press ENTER.Repeat fr each weight as prmpted. TX-1 Series Instrument pg. 15

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