Domestic Service Center Locations

Ohio Service Center
6969 Worthington Galena Rd, Suite C
Worthington, OH 43085
Tel: 614.484.9401
Service Territory: OH, KY, PA, and MI

E-mail  |  View Map

________________________________________

Colorado Service Center
4880 Robb Street, Unit 6
Wheat Ridge, CO 80033
Tel: 919.485.2204 ext. 2204
Service Territory: CO, UT, NM, KS, NE, ND, MT

E-mail  |  View Map

________________________________________

Northern California Service Center
11300 Sanders Dr., Suite 7
Rancho Cordova, CA 95742
Tel: 916.631.0234
Fax: 916.631.0541
Service Territory: Northern CA, WA, OR, UT, ID, MT, WY, AK, HI

E-mail   |  View Map

________________________________________

Southern California Service Center
10572 Acacia St Unit C-2
Rancho Cucamonga, CA 91730
Tel: 909.890.1069
Fax: 909.890.1503
Service Territory: Southern California, NV, AZ

E-mailView Map

________________________________________

Central Florida Service Center
531 Holts Lake Court
Apopka, FL 32703
Tel: 407.681.4221
Fax: 407.681.3188
Service Territory: FL, MS, AL, GA, SC

E-mail  |  View Map

________________________________________
Southern Florida (Fort Myers) Service Center
1681 Benchmark Avenue, Suite 100
Fort Myers, FL 33905
Tel: 239.215.1146

E-mail  |  View Map

________________________________________

Illinois Service Center
1430 Brook Dr.
Downers Grove, IL 60515
Tel: 630.261.9304
Fax: 630.261.9341
Service Territory: IL, ND, SD, IA, MN, WI, IN, MO, MI, OH, NE

E-mailView Map

________________________________________

Louisiana Service Center
12180 Greenwell Springs Rd.
Baton Rouge, LA 70814
Tel: 225.218.4703
Fax: 225.218.6026

E-mail  |  View Map

________________________________________

North Carolina Service Center
3008 E. Cornwallis Rd.
Research Triangle Park, NC 27709 U.S.A.
Tel: 1.877.TROXLER
Outside the USA: +1.919.549.8661
Fax: 919.485.2229
Service Territory: NC, TN, KY, WV, VA, MD, PA, DE, CT, NY, NH, ME, VT, MA, RI, NJ, Washington DC

E-mailView Map

________________________________________

Texas – Dallas Area Service Center
2016 E. Randol Mill Rd., Ste. 406
Arlington, TX 76011
Tel: 817.275.0571
Fax: 817.275.8562
Service Territory: TX, NM, CO, KS, OK, AR, LA

E-mailView Map

________________________________________

Texas – Houston Area Service Center
2500 Central Parkway, Suite L
Houston, TX 77092
Tel: 832.519.9342

EmailView Map

Nuclear Gauge Service

Troxler Electronic Laboratories offers state-of-the-art service using the latest technology at locations throughout the United States and Canada. In addition, Troxler distributors in over fifty countries are trained and carry parts required to complete all normal service repairs. We offer quality workmanship, fast turnaround, genuine Troxler parts, and professional, courteous service.

All Troxler Service Centers repair and service nuclear gauges.

Standard repairs include the following:

  • NIST Traceable Calibration
  • Replacement of routine maintenance items: gaskets, seals, labels, scraper ring, etc.
  • Complete electronic system analysis and adjustment
  • Mechanical and source rod inspection
  • Cleaning and lubrication
  • Leak test
 

Gauge Return & License Certification

A Gauge Return and License Certification form is required each time a nuclear gauge is returned to a customer. North Carolina regulations require that the customer is licensed to possess radioactive materials of the type, quantity, and form assigned to a specific gauge before returning the gauge to the customer. Complete this form to expedite the return of the gauge.

  How to ship a gauge to Troxler
 

Shipping Documents

 

Calibration

What is Gauge Calibration?

Calibration is a process where we check or adjust – by comparison with a standard – the accuracy of a measuring instrument. Read our Calibration Brochure for more information on our NIST-traceable Primary and Secondary Calibration Standard Blocks.

We service and calibrate all models of nuclear gauges, including Troxler, InstroTek, CPN, and Humboldt.

A2LA Logo With a Troxler calibration, you get:

  • ISO 17025 Accredited Laboratories in NC, CA, FL, and TX (view our scopes)
  • Industry experts with more than 100 years of combined experience
  • Dedicated calibration technicians
  • NIST-traceable standards
  • ASTM and AASHTO compliant three- and five-block calibration
  • Background and temperature-controlled calibration bays
  • Expert technicians and engineers available for troubleshooting
  • Full mechanical inspection and cleaning
  • ISO 17025 Accredited Total Lab Calibration

Field Service

Troxler has factory-trained technicians located across the United States. If you need on-site service for your Gyratory Compactors or NTO oven, please call the Troxler Service Department at 1.877.TROXLER (+1.919.549.8661). We can also help you with calibration of your other lab equipment!

 

Service locations that offer field service:
North Carolina, Florida, Arlington TX, Houston TX, Illinois, California

See our Domestic Service page for location and contact information.

Field Service support is available for the following models:

Gyratory Compactors

5850
4140-A, 4140-B
4141

New Technology Ovens (NTO)

4731 (240 volt unit)
4730 (110 volt unit)

Ignition Furnace

4155

Laboratory Services

Troxler has factory-trained technicians located across the United States. If you need service for your Laboratory or calibration needs, pleas call the Troxler Service Department at 1.877.TROXLER (+1.919.549.8661).

Service locations that offer laboratory equipment service:
North Carolina, Florida, Arlington TX, Houston TX, Illinois, California

See our Domestic Service page for more information.

 

We can also help you with service on field equipment. Call our Service Department at 1.877.TROXLER for details.

Trust the Leader
Troxler Electronic Laboratories, the leader in construction testing equipment for over 50 years, offers state-of-the-art service using the latest technology at five Troxler Service Centers and three Service Partners.

Protect Your Investments

Protect your investments with a Troxler Service Agreement. Choose one of three simple and straight-forward offers, a Maintenance & Calibration Package, an Extended Warranty, or a Full Service Agreement, to ensure your equipment stays in working order and your downtime is reduced. Contact your Troxler representative or nearest Service Center to learn more.

 

Service Maintenance & Calibration Package Extended Warranty Full Service Agreement
Repair  
Calibration
Routine Maintenance  
Preset Price

Turnaround Time

2 to 5 days 1 to 5 days 1 to 5 days
Preferred Shipping Rates*
Parts Cost  
Labor Cost  
1 Year Available
3 Year Available

*Shipping NOT included in price or turnaround time

 

Maintenance and Calibration Includes:

  1. All routine maintenance as outlined in the product’s operator manual
  2. Includes standard part replacement cost and labor
  3. Calibration
  4. Cleaning and lubrication
  5. Complete mechanical assessment
  6. Repair notification (if not under contract)
  7. All software updates, if required

 

Troxler Extended Warranty Includes:

  1. Pre-priced service contract
  2. At warranty conclusion
  3. Available later in life with pre-certification (sometimes offered as a promotion)
  4. Provides for repair services
  5. Based on serial number
  6. Includes parts and labor
  7. Includes calibration if repaired
  8. Available for one year or three years

 

Troxler Full Service Agreement Includes:

  1. Pre-priced service contract
  2. At warranty conclusion
  3. Provides for repair services
  4. Based on serial number
  5. Includes parts, labor, and calibration
  6. Available for one year or three years
  7. Three-year agreement includes three annual calibrations and routine maintenance

Gauge Service FAQs

Reset battery life to 190 hours. Ensure charger is good. Check charger jack to see if it is loose/broken. Possible bad battery pack.

Take the gauge to a clean, dry environment and remove the control panel or “scaler”. Check for loose hardware inside the gauge that could short the high voltage. Check for moisture inside the gauge and, if moisture is present, remove the scaler and dry overnight with a fan.

Ensure that the gauge is positioned properly. Make sure that stored standard counts are appropriate by comparing to the factory standard counts.

Obtain the gauge’s most recent calibration printout and check that the calibration constants in the memory match those on the printout. Also, verify that the depth strip is functioning correctly. Check for correct standard counts.

Ensure you have a good standard count. Verify you are at the correct depth. Check to make sure no offsets are enabled.

Magnalube is the recommended lubricant. Place a small amount on the source rod and exercise the rod up and down. Check the bottom of the gauge to make sure dirt has not accumulated in the sliding block or base plate area.

Note: If the sliding block will not open smoothly, it needs to be cleaned by an authorized person before use. If it sticks open, even a small amount, there is a potential for excess radiation exposure to those near the gauge.

You need to calibrate the depth strip. If this doesn’t fix the problem, your gauge may need servicing.

In order to scale the count values to a reasonable number of digits, Troxler devices use prescale factors when performing measurements, standard counts and any other diagnostics count.  In other words, the count that a gauge displays is the total number of ionization events measured by the gauge divided by the appropriate prescale factor.
 
The prescale factor is typically not needed by the gauge operator.  However, the ASTM standards D 6938 and D 2950 give a formula to compute the gauge precision by the slope method, which requires the use of the prescale factor.  The prescale factors are listed below:

For Troxler Models 3401, 3411, 3430, 3430 Plus, 3440, 3440 Plus, and 4300 devices, a prescale of 16t is used, where t is the duration of the count in minutes.  So, for a 15 second count, the prescale is 4, for a 1 minute count the prescale is 16, for a 4 minute count the prescale is 64.

For Troxler Models 3450 and 4640 devices, a prescale of 8t is used, where t is the duration of the count in minutes. So, for a 15 second count the prescale is 2, for a 1 minute count the prescale is 8 and for a 4 minute count the prescale is 32.

Press and hold the OFF button for 15-30 seconds until the gauge turns off. If it does not turn off, remove the scaler and unplug the ribbon cable from the baseboard. Plug the cable back in and turn the gauge on, allowing it to go through its 5 minute self-test.

Perform memory reset on gauge. 3440 / 4640

Take a new standard count. (Note: A standard count must be taken each time a 3411 is turned off. It does not store standard counts.) Ensure depth switch is at the correct depth.

 

Gyratory Compactor Service FAQs

Possibly the brake is slipping and thereby not allowing the angle to be fully set on. Tighten the brake cable until the brake ring doesn’t slip during angle on operation.

A zero angle screw stuck in the down position. Power off machine and remove the top electronic box. Unscrew the three zero angle screws (pulley atop each). Power on machine and escape to Idle screen. Press Setup then item 6 (manual). Select item 5 (unlatch mold). Select item 4 (lower ram).

The most likely cause is a loose one inch nut on the jack. Remove the front panel and lift the jack shaft by hand (place height standard under head inside chamber to keep it held up). Remove the one inch nut atop the jack screw and turn the shaft counterclockwise to screw the anti-rotation bar firmly down. Clean the nut and apply blue Loctite to the treads before tightening it back on the jack shaft.

This is most likely caused by a failure on the CPI board. Please contact the Troxler Service Department at 1.877.TROXLER for assistance.

`

A power glitch can cause this if the printer power cord is plugged into an outlet other than the Aux outlet on the rear of the compactor. Power down both printer and compactor and plug printer power cord into compactor. Power on compactor and then printer.

A defective angle sensor or the sensor has become unplugged.

 

Ignition Oven FAQs

A defective DCMI board or failed D.C. Motor Controller. Please contact the Troxler Service Department at 1.877.TROXLER for assistance.

A failed solid state relay (the middle one on the power cord panel). Please contact Troxler Service Department at 1.877.TROXLER for assistance.

The constants may have been corrupted by a power glitch. Print the constants, reset the machine and chamber, re-calibrate the Weight Window, recalibrate the scale, and re-enter the temperature constants.

A broken chamber thermocouple. Please contact Troxler Service Department at 1.877.TROXLER for assistance.

 

NTO FAQ’s

Ensure that the door latch is making good contact with the door interlock switch. Adjust the door latch if needed.

Inspect and clean the easy access side plenum of the NTO (refer to instructions in the manual). Check the exhaust system and ensure it is clean and there is nothing restricting the airflow, such as a mesh screen. Ensure that the exhaust duct is 4″ in diameter and not 3″ duct, which will slow the airflow considerably. Try to eliminate any 90-degree elbows in the exhaust duct that can slow the airflow considerably. Inspect and verify that the NTO fan is turning.

  • Ensure that you have evenly spread the sample in the sample trays.
  • Ensure the NTO is preheated properly before using. Recommended preheat temperature for 4730 (120V unit) is 400C and for 4731 (240V unit), 370C.
  • Ensure that the auto-control cut off is set at 0.01%.
  • Change the burn profile from Default to Option 2 (more aggressive burn profile).
  • Ensure the exhaust system is operating properly.

Verify the chamber temperature at the end of the burn. It should be below 400C. If higher, inspect and clean the NTO and the exhaust system. Change the burn profile from Default to Option 1 (less aggressive burn profile).

Ensure that the basket assembly is centered in the furnace and not touching one of the sides.

 

Gyratory Compactor FAQS

Check the preheat temperature of molds and hot-mix-asphalt (HMA). Make sure they have been heated up to the same specified temperature. Low mold and/or HMA temperature will cause lower compaction. Make sure the HMA is covered while preheating the mix. Uncovered mix will not compact as well.

Grease cam followers daily using Teflon based lubricant such as Magnalube-G (a can supplied with the gyratory). Keep gyratory clean of binder build up. Clean the ram head, and molds daily and cam followers weekly using WD-40. Remember to re-grease cam followers after cleaning.

Make sure you calibrate the height using mold’s bottom puck under the height standard. Leaving the bottom puck out will cause a 25mm errorin the height reading.

Make sure to plug the printer into the outlet on the back of the gyratory (not into a standard wall outlet) and make sure the printer’s on-line light is on.

Check and replace the fuse for the outlet.

  • Check all cable connections
  • Check the calibration equipment power connection
  • For the 4140, ensure that the height standard (for height calibration) and the load cell (for pressure calibration) are centered on the turntable
  • For the 4141, ensure that the height standard (for height calibration) and the load cell (for pressure calibration) are centered on the ram head and then offset approximately 1/4 inch (6mm) toward the rear of the chamber

The following procedure describes the deactivation of the zero angle screw system in the 4141 model compactor. It has been determined that disabling this system will have no adverse affects on the operation of the 4141.

The 4141 has three (3) ZERO ANGLE screws that are threaded shafts with a pulley mounted on top. A motor with a pulley drives a rubber belt that drives the three screws down and up.

  1. Turn off power switch and remove power cord and printer cable.
  2. Unscrew the three bolts from the top plate of the 4141 and remove the top plate.
  3. Unscrew the three black plastic handled bolts from the top of the electronics module (hereafter referred to as ELMO) and set them aside.
  4. Unscrew and unplug the three (3) cable assemblies on the ELMO (one near center top and two near power switch).
  5. Grasp the two handles atop the ELMO and lift it out of the 4141.
  6. Look down in the area below where the ELMO was and to the left rear to locate the belt drive motor. Locate the short (2 inch) red jumper wire on this motor and unplug it. Use a knife or cutter to cut the drive belt and discard it.
  7. Look inside the sample chamber at the ceiling to make sure all three zero angle screws are fully up. Use a wrench to loosen any that may be stuck and screw them up until they are not down any inside the chamber.
  8. Re-install the ELMO and reconnect the three cables. Install and tighten the three plastic handled bolts.
  9. Bolt on the top plate and reconnect power and printer cables.

 

Nuclear Gauge and Field Equipment FAQ’s

No. The target value is only used by the gauge to calculate the percent of compaction that has been achieved. The gauge will still give Wet Density, Dry Density, Moisture and Percent Moisture results without the target density entered. The percent compaction can be calculated at a later time if necessary.
Example: (DD/Proctor) x 100 = %Proctor or (WD/Marshall) x 100 = %Marshall

The percent moisture result will be elevated and the dry density read by the nuclear density gauge will be lower if the material contains frost. Therefore, the tests will fail. When the water freezes it expands and takes up a larger volume in the material beneath the gauge. Because water is less dense than the measured material, the density will be lower and the percent moisture will be higher. It is commonly written in engineering specifications that “no fill may be placed over frozen material.” In extreme cases, settling could occur if frozen material is covered and thaws at a later time.

Usually they will not. There is a lot of room for operator error when performing a sand cone test. There is really no way to prove which test is more “accurate” because there is no absolute test for soil density. The best way to compare the two test methods is to take at least three 4 minute nuclear gauge measurements at different locations (preferably direct transmission @ 6 or 8 inches) and at least 3 sand cone tests (at the same locations as the gauge readings). Find the difference at all locations and average them.

Either one would be acceptable. The best thing to do is try one of each. Ideally the direct transmission will give a more representative reading, but it may also disturb the larger aggregate and lower the density. If you try both in the same spot (backscatter test first) and see which gives a better reading you can make the decision for yourself. If the material thickness is over 4″, direct transmission is more appropriate in order to get a representative measurement.

In order to scale the count values to a reasonable number of digits, Troxler devices use prescale factors when performing measurements, standard counts and any other diagnostics count. In other words, the count that a gauge displays is the total number of ionization events measured by the gauge divided by the appropriate prescale factor. The prescale factor is typically not needed by the gauge operator. However, the ASTM standards D 6938 and D 2950 give a formula which requires the use of the prescale factor to check the stability of the standard counts. The prescale factors are listed below: For Troxler Models 3401, 3411, 3430, 3430 Plus, 3440, 3440 Plus, and 4300 devices, a prescale of 16 is to be used in the formula when a 4-minute standard count is performed. For Troxler Models 3450 and 4640 devices, a prescale of 8 is to be used in the formula when a 4-minute standard count is performed.

It can read the moisture as a relative reading; in other words it will give an indication of a problem area, but will not give a definite moisture content. There are constituents in concrete that can cause the moisture readings to be in error, but as long as the concrete is homogeneous, the error will be constant. Example: If the slab reads approximately 12% moisture in all areas but one area is approximately 20%, it can be assumed that this is a problem area. This will give an indication of where a core sample should be taken for investigative purposes.

This message means that the gauge cannot calculate the test results. Usually this is due to the fact that there is no standard count in the memory. Also, this could mean that the depth switch is not correctly set; if the depth switch is set at a value much different than that which is actually being measured, the calculated results will be too large for the gauge to calculate. Try taking a new standard and checking the depth switch before taking a measurement.

The oven dry tells the true moisture content by removing all water from the sample. The gauge measures the hydrogen present in the material; which is usually in the form of water. If the material contains naturally occurring hydrogen or bound hydrogen, the gauge will measure the moisture falsely high in many cases. (Some of these materials are: mica, lime, fly ash, cement, organic materials, gypsum, coal, phosphates, etc.) A false low reading can also occur but is less common (causes include: high salt or iron oxide content or boron, lithium or cadmium present). A moisture offset will adjust for this problem.

We recommend that the gauges be properly evaluated for accuracy or calibrated every 12 months.

  • ASTM D 6938 & AASHTO T 310 In-Place Density and Moisture Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)
  • ASTM C 1040 Density of Unhardened and Hardened Concrete In Place by Nuclear Methods
  • ASTM D 2950 Density of Bituminous Concrete In Place by Nuclear Methods

For models 3440 and 4640, reset the battery life to 190 hours. Ensure charger is good. Check charger jack to see if it is loose/broken. Possible bad battery pack.

Take the gauge to a clean, dry environment and remove the control panel or “scaler”. Check for loose hardware inside the gauge that could short the high voltage. Check for moisture inside the gauge and, if moisture is present, remove the scaler and dry overnight with a fan.

Ensure that the gauge is positioned properly. Make sure that those standard counts stored are appropriate by comparing to the factory standard counts reported in the most recent calibration printout. If a standard count has not been performed in more than a month and a new count fails by a small percentage (less than 5%), accept the new count and perform four more. The fifth standard count should pass.

Obtain the gauge’s most recent calibration printout and check that the calibration constants in the memory match those on the printout. Also, verify that the depth strip is functioning correctly. Check for correct standard counts.

Ensure you have a good standard count. Verify you are at the correct depth. Check to make sure no offsets are enabled. Make sure that the handle is clicked into the notch (depth position) properly. Do not pass notch or push up on the handle after positioning it.

Magnalube is the recommended lubricant. Place a small amount on the source rod and exercise the rod up and down. Check the bottom of the gauge to make sure dirt has not accumulated in the sliding block or base plate area.

You need to calibrate the depth strip. If this doesn’t fix the problem, your gauge may need servicing.

Press and hold the OFF button for 15-30 seconds until the gauge turns off. If it does not turn off, remove the scaler and unplug the ribbon cable from the baseboard. Plug the cable back in and turn the gauge on allowing it to go through its 5 minute self-test.

Perform memory reset on gauge. 3440 reset / 4640 reset

No. Troxler provides a MSDS disclaimer statement for your files.

A list of compatible USB devices is available here.