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Humboldt HM-2750 Series, Руководство по эксплуатации продукта

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Instrument Inputs (load cell/transducer connections)

Models HM-2750A and HM-2750D have 4 instrumentation inputs  
located on the back panel to accommodate load cell/transducer  
connections. This feature allows you to set up and calibrate up to 4  
different instruments, which the unit can quickly switch between for 
those needing to do multiple tests.
Third-party load cells/transducers, which are compatible, can also be  
used with the HM-2750 Series. Compatible units will have an  
excitation voltage of 0-10 volts and an output of 0-100 millivolts.  
Prior to use all third-party instrumentation mush be configured and  
calibrated for use. Please refer to the Configuration and Calibration  
sections of this manual. 
If you are using third-party cables for transducer connections, make  
sure they are wired to be compatible with the HM-2750. Consult  
Figure #1 for a compatible reference wiring diagram. Plugs to connect 
third-party instrumentation to the Humboldt HM-2750s are available, 
order part HM-000474

. 

Preparation and Loading Procedure

1.  Place test samples in carriage and tighten clamp screws on 

assembly. Remove the two lock screws from the squares and then 
turn down and bring back the two other screws to split the sample.

2.  Raise and locate the crossbar on top pad in vertical position, This 

verticality is achieved by adjusting the carriage position. Raise 
beam jack to hold loading arm so that no load can be applied to 
the sample. Add weights to give the necessary stress while the 
beam is secured.

3.  Locate and fix top screws on crossbar and locate consolidation dial 

gauge, (add water at this point). Beam position should be level. 

4.   Release beam jack and consolidate sample. 
5.  Shearing preparation:

a.  Take up slack by adjusting lock nuts on the reaction bracket.
b.   Position strain dial gauge on bracket. (dial gauge should be  

 fully compressed) .

c.  When required, re-select travel direction by switching “S” 

button and before operating the “F or R” switch in the 
direction of travel, release the direction bracket screw to 
take load out of proving ring. The dial gauge in this zero load 
condition should be compressed to its midway position.

8

Содержание HM-2750 Series

Страница 1: ...product manual 08 13 HM 2750 Series Humboldt ShearTester ...

Страница 2: ...he applied normal stress to be calculated The apparatus in this manual permits test to be conducted on soil specimens of 60mm and 100mm which are 25mm maximum height and for specimens of 2 5 inches by 1 inch in height Test Type The HM 2750A Series of Direct Shear machines are designed for performing drained shear tests for the determination of effective shear strength parameters No means are incor...

Страница 3: ...n for Fast movement actions This allows the instrument to carry out soil tests under Strain control Support for up to either 4 analogue transducer inputs covering the range a to 100 m V suitable for most Load and displacement devices or 4 digital dial indicators inputs Configuration and Calibration facilities are provided and all important data is stored in non volatile memory for safe preservatio...

Страница 4: ...g tracks When mounted the carriage is transversely restrained but is free to glide axially along the centerline of the geared jack and reaction bracket Affixed to the geared jack is the vertically mobile dial gauge arm The dial gauge arm mounts an anti clockwise dial gauge allowing for direct visual measurement of the consolidation of the sample Shearbox squares are not included with the standard ...

Страница 5: ...e base The standard measuring devices are the load ring and dial gauges The load rings are of either 2kN or 5kN capacity Each load ring is supplied with a dial gauge for measuring deflection in the load ring One additional dial gauge is required to measure the displacement of the upper and lower shearbox halves The power ON OFF switch is located at the rear of the apparatus When it is switched ON ...

Страница 6: ... is the sole property of HUMBOLDT MFG CO It is licensed for use by the original purchaser of this equipment for a period of 99 years Transfer of the license can be obtained by a request in writing from HUMBOLDT MFG CO With the exception of HUMBOLDT Authorized Service Facilities you may not copy alter de compile or reverse assemble the software in any fashion except as instructed in this manual US ...

Страница 7: ...urer makes no recommendations or claims regarding fitness for applications other than the specific tests as defined in this User Guide General Warnings Safety Warnings Operators should take care to operate this machine under the maximum load restrictions The machine is programmed at the factory to provide safety shutdown if the upper or lower maximum travel is exceeded Electrical Warnings Typicall...

Страница 8: ... utilizing the adapters provided The dial gauge should be compressed to its midway position approximately 5mm by the adjusting screws in the proving ring Electrical Connections Humboldt HM 2750 Series controllers are equipped with an internal digital switching power supply which allows them to be used with most power configurations throughout the world The units are supplied with an IEC electrical...

Страница 9: ...available order part HM 000474 Preparation and Loading Procedure 1 Place test samples in carriage and tighten clamp screws on assembly Remove the two lock screws from the squares and then turn down and bring back the two other screws to split the sample 2 Raise and locate the crossbar on top pad in vertical position This verticality is achieved by adjusting the carriage position Raise beam jack to...

Страница 10: ...stem software Additional Device Connection Additional devices such as additional HM 2750s and or HM 3000 Load Frames MIniLoggers and other computer compatible load frames can be connected to a computer via the RS 485 port on HM 2750A and HM 2750D models This allows you to daisy chain several devices to the same computer Use a standard CAT 5 cable not included to link the additional device s output...

Страница 11: ...dt Chart Recorder Figure 2A Rear panel of HM 2750A showing the four Analogue instrumentation channel inputs the Analogue Port RS232 Port RS 485 Input and Output the On Off Switch and the motor cable input Figure 2B Rear panel of HM 2750D showing the four Digital instrumentation channel inputs the Analogue Port RS232 Port RS 485 Input and Output the On Off Switch and the motor cable input Figure 2C...

Страница 12: ...11 Figure 4 Diagram illustrating computer and multiple device connections USB to RS 485 HM 000379 ...

Страница 13: ...roller above the electrical cord inlet Also located between the electrical cord inlet and the Power Switch is the Fuse Compartment Humboldt HM 2750s use a 10 amp fuse To begin operation press the Power Switch Figure 6 HM 2750 Power Switch Electrical Cord Inlet and Fuse Compartment 12 Fuse Compartment ...

Страница 14: ... selected platen speed between 0 00001 and 0 499999 inch min Stop Key Pushing the Stop Key stops the machine Forward Key Pushing the Forward Key moves the shear box to the right Also by holding down the Key the machine will move forward at the fast rate of 0 5 in min Releasing the key changes the machine s speed back to its set rate Reverse Key Pushing the Reverse Key moves the shear box to the le...

Страница 15: ...enu driven display The function keys correspond with the command lines on the menu display F1 corresponds with the first command line F2 the second etc Command lines that are active in any display will be proceeded by an If no is present the corresponding function key is not active 14 ...

Страница 16: ...ct the month date year Press INCREASE or Press DECREASE to change the appropriate number To return to any prior screen you can always press Set Time To set the Time press until you see this screen REVIEW LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STND SET DATE SET TIME UNITS ENG METRIC DATE MM DD YY INCREASE DECREASE REVIEW LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STN...

Страница 17: ...an always press Set Units To set the Units the HM 2750 will use to display results press until you see this screen Press UNITS to toggle between English and Metric Units Select the units desired the flashing units are the active choice To return to any prior screen you can always press SET DATE SET TIME UNITS ENG METRIC TIME HH MM SS INCREASE DECREASE SET DATE SET TIME UNITS ENG METRIC STANDARD AS...

Страница 18: ... LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STND SET DATE SET TIME UNITS ENG METRIC STANDARD ASTM BS Rate Motor Speed Adjust To set the speed of the HM 2750 press SPEED You should see this screen Press SPEED to move between the numbers Keep pressing until the digit you want to change is flashing Once you have selected the number you want to change press INCREASE or DECREASE to change...

Страница 19: ...ee this screen Press CONFIGURATION You will be asked for a password enter You should see this screen Press SELECT CHANNEL to scroll through and choose the channel you wish to configure Once you have selected a channel press CONFIGURE CHANNEL You should see this screen REVIEW LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STND CONFIGURATION CALIBRATION SAMPLING INTERVAL MANUFACTURES INFO ...

Страница 20: ...LU2 VOLU3 and VOLU4 NOTE It is important to assign an appropriate name when naming channels because the HM 2750 Series controller will choose a unit of measure based on the name assigned For example if you are configuring a load cell name the channel Load 1 2 3 or 4 This will ensure that the channel reads in lbs kN The same applies to Displacement DISP 1 2 3 or 4 reading in in mm and Pressure PRES...

Страница 21: ...ation These are the numbers that correspond to each Humboldt device Load Cell Part Eng Max lbf Metric Max kN 10 000 lb 50kN HM 2300 100 010000 050 00 5 000 lb 25kN HM 2300 050 005000 025 00 2 000 lb 10kN HM 2300 020 2000 0 10 000 1 000 lb 5kN HM 2300 010 1000 0 05 000 500 lb 2 5kN HM 2300 005 0500 0 02 500 LVDT Transducer Part Eng Max in Metric Max mm 0 4 10 0mm HM 2310 04 0 4000 10 000 1 0 25 4mm...

Страница 22: ...FIGURATION You will be asked for a password enter You should see this screen Press SELECT CHANNEL to scroll through and choose the channel you wish to calibrate Once you have selected a channel press CONFIGURE TEST You should see this screen REVIEW LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STND CONFIGURATION CALIBRATION SAMPLING INTERVAL MANUFACTURES INFO CONFIGURATION SCREEN SELECT...

Страница 23: ...Shear Tests Calibration Models A and D only This menu item is used to calibrate or verify the calibration of the HM 2750 NOTE The HM 2750 and instrumentation is usually calibrated at the factory WARNING Calibration should only be performed by trained personnel with proper certified equipment The HM 2750 and its instrumentation should be calibrated once a year Channel Calibration To calibrate a cha...

Страница 24: ...ached to the HM 3000 record the division min value with no load on the instrument X divisions Next apply the full engineering load value to instrument on the calibration frame and again record the division min reading X divisions Subtract the two values This value should be a number larger than the maximum rating of the instrument If not you need to increase the gain to compensate for the differen...

Страница 25: ...y the 100 force to the instrument and press SET MAX To return to any prior screen you can always press On the next page is an Instrumentation calibration chart listing max divisions as well as typical gain factors needed in calibrating each instrument type Load Cell Part English Gain Metric Gain divisions divisions 10 000 lb 50kN HM 2300 100 10000 4 5000 4 5 000 lb 25kN HM 2300 050 5000 2 2500 4 2...

Страница 26: ...PEED to move between the numbers Keep pressing until the digit you want to change is flashing Once you have selected the number you want to change press INCREASE or DECREASE to change the number to the desired value REVIEW LAST TEST RUN TEST ENGINEERING SETUP SET DATE TIME UNITS STND DIRECT SHEAR TEST MOTOR SPEED ADJUST SPEED X XXXX INCREASE DECREASE ...

Страница 27: ...ery X sec depending on what the sampling interval is set at see Sampling Interval Once the load cell has reached its peak load and fallen 2 the machine will stop collecting data and reverse the platen back to the lower limit at the fast rate 0 5 in min The peak load will be displayed You should see this screen The peak values are shown on the first two lines You can then review the data by pressin...

Страница 28: ...CT SHEAR TEST However you need to load another before you press If you don t have a printer or computer connected to the frame you can press SCROLL DATA to scroll the data You should see this screen You can then press NEXT to see the next reading or LAST to see the last reading To return to any prior screen you can always press LOAD READING NEXT LAST READING ...

Страница 29: ...l pre defined reporting software modules and templates are available for specific tests such as CBR Triaxial etc These modules provide more control over start and stop conditions for specific tests as well as provide extended reporting capabilities Contact Humboldt for more information Table graph and Excel output of user defined test generated from software included The minimum compatible compute...

Страница 30: ...cal Specifications Dimensions l x w x h 8 3 x 9 5 x 4 7 inch 210 x 240 x 120mm Shipping Weight 6 lbs 2 7Kg Electrical Electronics Specifications Voltage 110 220 VAC 50 60HZ Data storage 300 Readings Channel Computer port RS232 ...

Страница 31: ...dtmfg com Hidden Functions The following are functions that are possible if needed to access them please contact support at the numbers or email address listed above 1 System reset Reset available in case of serious problem in system memory This will cancel all data in memory calibration configuration of all channels 2 System restore Restore to be made in case of above This will restore all factor...

Страница 32: ...the thumbscrew on the support hook and adjust the position of the hook Tighten the thumbscrew again to secure the support hook 2 Fine adjsutment is accomplished by loosening the nuts that secure either of the hooks on the hanger bar and adjusting the hooks up or down When the adjustment is complete tighten the nuts to secure the hooks Loosen wing nut and extend hook as necessary Loosen nuts and ad...

Страница 33: ...UMBOLDT Testing Equipment for Construction Materials Humboldt Mfg Co 3801 North 25th Avenue Schiller Park Illinois 60176 U S A U S A Toll Free 1 800 544 7220 Voice 1 708 456 6300 Fax 1 708 456 0137 Email hmc humboldtmfg com ...

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