Torque Calibration

Hydraulic, Pneumatic, and Electric (Battery operated) torque calibration

JM Test Systems provides a hydraulic, pneumatic, and electric torque calibration service of up to 20,000 – foot pounds for hydraulic calibration and 12,000- foot pounds for pneumatic and electric calibration using state of the art standards. A Certificate of Calibration is issued with each tool with the availability of ISO 17025 accredited calibrations. We have a pickup and delivery service for your equipment or you… Continue Reading »

Pressure Gauge Calibration

What is pressure gauge calibration?

The calibration of your pressure gauge or gauges guarantees the accurate readings you need to meet safety and compliance standards, while on the jobsite. Pressure gauge calibration determines that your pressure gauge is working properly, according to the manufacturer’s standards. Pressure gauges are some of the most commonly used instruments and can be found in almost every laboratory. The sheer abundance of pressure gauges in a lab can often lead… Continue Reading »

Torque Multiplier Calibration

Torque Multiplier Calibration
JM Test Systems provides a torque multiplier calibration service up to 5,000-foot pounds. We offer torque multiplier rental equipment, complete repair on broken units, and new sale options on all the top brands. We offer a pickup and delivery service for your equipment or you can drop them off at one of our six locations.

We provide Armstrong, Enerpac, Geartronics, Proto, Snap-on, Williams, and X-4 multiplier calibration along with all the other major brands. Calibration… Continue Reading »

Micrometer Calibration

Micrometer Calibration

Micrometers can be found in many different quality departments. Micrometers are used to measure thickness, diameters, and depth of slots with small distances. Reoccurring calibration of your micrometer guarantees the precise readings you need to meet safety and compliance standards, while on the jobsite. Errors that arise from using uncalibrated or damaged equipment may result in costly consequences that can affect you or your employees.

Micrometer Calibration

Why do micrometers need calibration?

Calibration of your micrometer… Continue Reading »

Dynamometer Calibration Services

Dynamometer Calibration Services

Properly maintained dynamometers are essential to the accuracy of measurements and safety of employees and equipment. Make yearly calibration of dynamometers at JM Test Systems part of your maintenance plan. With over 20 years of experience in force measurement using state-of-the-art equipment, JM Test Systems has proudly served oil and gas pipeline, electrical, utility contractors, transmission and distribution, aviation, marine and many other industries. Get a quick quote!

JM… Continue Reading »

PK Tester, RK , & HK Deadweight Tester Upgrades

PK Tester Calibration and Upgrade

Pneumatic input driven Deadweight Calibration Units. Repairs and Upgrades for RK , HK, and PK testers.


Dead Weight Tester Repair / Upgrade

Like new again

JM can repair broken units and upgrade your older units. PK Tester Upgrades: Why Pay New? You can have just as good as new, with an upgraded “original style” PK Tester. With an upgrade you get a new hard… Continue Reading »

Oscilloscope Calibration Services

Oscilloscope Calibration Services

JM Test Systems has the equipment and expertise to calibrate a wide variety of oscilloscopes. Our digital and analog oscilloscope calibration services include single channel, multi-channel, benchtop, and handhelds. JM can calibrate nearly any oscilloscope with a bandwidth up to 3.2 GHz. Get a quick quote!

Oscilloscope Calibration Services
Our experienced technicians have calibrated oscilloscopes from manufacturers including Tektronix, Keysight/Agilent/HP, B&K Precision, Rigol, Nicolet, Teledyne LeCroy and more. JM also… Continue Reading »

Hipot Tester Calibration and Repair

Hipot Tester Calibration and Repair

JM Test Systems provides hipot tester calibration on several makes and models. Manufacturers we calibrate and repair include Associated Research, AVO International, Baker Instruments, Baur, Biddle, Criterion, Haefely, High Voltage, HV Diagnostics, Kikusui, Megger, Multi-Amp, Phenix Tech, Quadtech, Rod-L Electronics, Sotcher Measurement, Vitrek, Von, and more.

Repair • Upgrade • Calibration • Certification • Rental

Hipots or High Potential testers are devices used to… Continue Reading »

Megger Calibration & Repair – Authorized Service Center

“Megger” has become a generic trademark for most insulation testers as well as other units out in the field. But the “Megger” trademark has been held by its company for decades, a company that continues to grow and produce reliable products. And now, JM Test is an Authorized Service Center for Megger, one of a… Continue Reading »

PIM Analyzer Calibration Services

PIM Tester Calibration Services

JM Test Systems provides PIM analyzer calibration services on several makes and models. Manufacturers include Anritsu, Kaelus, Rosenberger, CCI PIMPro, and Booton. Many of our PIM analyzer calibration services are available on site at your job location.

PIM (Passive Intermodulation) is the generation of interfering signals caused by nonlinearities in the mechanical components of a wireless system. Two signals mix together (amplitude modulation) to produce sum and… Continue Reading »

The Cluttered Workshop and the Emerson Trex

Emerson Trex Improvement

A process plant can be a harsh environment; as a result, devices will occasionally need to be returned to the shop for evaluation, repair, or configuration. Unfortunately, connecting to a device in the shop to check configuration and functionality is a cumbersome process that eats up valuable man-hours.

To evaluate a device in the shop, the technician first needs to round up a power supply that is appropriate for the device. This means… Continue Reading »

Troubleshooting pH Instruments with PIE Calibrators

Troubleshooting pH Instruments with PIE Calibrators

Troubleshooting pH Instruments using a PIE Calibrator

Instruments that measure pH are some of the most difficult devices to maintain in a process plant. While temperature, frequency & pressure sensors, under the right conditions, measure for years, the pH sensors require regular maintenance and replacement. Many technicians get frustrated when there is a problem with pH sensors and instruments not reading correctly. A PIE calibrator with pH simulation can speed up the troubleshooting… Continue Reading »

Fix It When You Find It: Hart 475 Field Communicator

Hart 475 Field Communicator

Monitoring and tracking the status of equipment in the field is an essential part of day-to-day plant operation. Field technicians are the eyes and ears of the plant, whether they are investigating a known issue or are simply monitoring assets during regular rounds. From asset management software to field tools, everything should work together seamlessly to ensure maintenance is efficient, data is accurate, and devices are healthy.

The Problems with Paper

Tracking diagnostics in the… Continue Reading »

Simplifying Valve Monitoring

Hart 475 Communicator ValveLink

Valve health inevitably degrades over time. The parts move, resulting in wear. However, valves don’t usually fail without warning, providing technicians have the tools to identify these warning signs.

To give technicians comprehensive control to solve valve issues, they need to have constant, easy access to advanced valve diagnostics in the field.

Using ValveLink™ Mobile software on the 475 Field Communicator gives technicians the ability to perform advanced valve diagnostics in the field. They can… Continue Reading »

Using HART Protocol to Manage for Quality – Martel LC-110H and HART Communications Diagnostics

Hart transmitter calibration LC110H with transmitter


In this white paper we are going to cover the basics on HART communications and the diagnostic capability of the Martel LC-110H mA (loop) calibrator.

Exactly what is HART Communication?

In today’s process plants, most new field instruments are smart digital instruments. The most common class of smart instruments incorporates the HART protocol, with more than five million HART instruments in use in 100,000 plants worldwide. HART, an acronym… Continue Reading »

Ralston Block and Bleed Valves Make Your Gas Last Longer

Block and bleed valve for calibration

Keep Gas in the Tank

  • Conserve compressed gas by venting only the gas that needs to be vented in a device under test and nothing more…….
  • Brass and Stainless Steel, 3000 psi & 5000 psi working pressure
  • NPT, male & female quick-test fittings

Ralston Block and Bleed Valves are an excellent accessory for doing pressure calibration with a Ralston Volume Controller, Nitropak, Calibration Manifold or other calibration device. This unique valve helps conserve compressed gas by venting only… Continue Reading »

CALIBRATION TECH BRIEF: BK Precision 4010A – VCG Out of Tolerance


The Out of Tolerance Solution

We had two BK4010A generators in for calibration in the JM Test Alexandria Lab recently, and all parameters except one were well in tolerance.  The out of tolerance condition was the Voltage Controlled Generator(VCG) frequency section of the verification.

Briefly, the verification consists of the following:
Set the Frequency Range to 200 kHz, and the dial to 2 (setting the frequency to 200 kHz).  Apply a… Continue Reading »

Validating the Hysteresis of Pressure Switches on Pipeline Pigging Systems

Pipeline testing equipment


A pipeline integrity services company needed to accurately test the hysteresis1 of the pressure switches used to control their pigging systems. We will show how using a Druck DPI 802 pressure indicator/loop calibrator is an improvment over previous testing methods and pipeline testing equipment.


This company offers a variety of services to assist oil and gas companies assess the condition of their pipelines. These pigging systems are sent into… Continue Reading »

Evaluating Calibration Tolerances Can Save You Trouble

Calibration Tolerance

Is Losing Business Worth the Risk?

Having an instrument not meeting specifications is bad for the owner or operator of an instrument and bad for the manufacturer.  It can be costly. The owner may need to take special action to mitigate the
problem, perhaps even recall work done. The manufacturer may lose customers’ trust. Clearly, it is a situation to be avoided. Without due consideration, out-of-tolerance conditions may be much too likely to occur.
Continue Reading »

NIST Numbers… What Are They?

What are NIST numbers

What is the official NIST Number on my report?

The official NIST number, or the number that NIST uses to keep track of reports, is a long number containing the number for the Division performing the service, the number the NIST Calibration Program Office generates, and the year the service is performed. This number should be on every page of the report. For example, a typical number for our Division (821) is 821/123456-97.

Many reports will… Continue Reading »

Pressure Safety Valve Testing – Best Practices

A pressure safety valve (PSV) protects pressure vessels and piping systems from excessive internal pressure. When a system reaches a predetermined pressure the PSV opens, a portion of the media discharges, and the pressure inside drops to a safe limit. Once the pressure reaches the valve’s reseating set point, the valve… Continue Reading »

Evaluating Digital Manometers

The digital manometer is a recent addition to field calibration instrumentation. These instruments are light weight, approximately 1 pound, and are available with accuracies from 0.2% to 0.025%. Their accuracy places them between the manometer and the dead weight tester, while their size and weight make them more convenient for field calibration. Most available instruments have a 3 ½ or 4 ½ digit… Continue Reading »

Understanding Digital Manometer Accuracy and Resolution

Meriam digital manometer for process control

Digital Manometers and Their Many Uses
What is an inch of water? The correct answer to this question has taken on increased importance with the demand for better accuracy and the introduction of digital manometers. For example, lets assume that you have just received your new digital manometer (like a Meriam M200) and you decide to verify its accuracy. The manufacturer claims 0.1% accuracy at 100 inches of water. You set up a test using… Continue Reading »

Use Remote Measurements and Increase Safety for Dangerous Equipment

XCIEL XCiPhone4s

Take readings quicker and solve problems faster with simultaneous, recordable, remote measurements.

This video shows how to:

  1. take remote measurements away from dangerous equipment(60ft away)
  2. take multiple readings at the same time
  3. record those readings without writing them down
  4. see live measurements from multiple modules simultaneously on one screen
  5. measure AC voltage, AC current and temperature

This is a video that monitors an injection molding machine for quality issues on one of the heating bands while in… Continue Reading »

How to Take Multiple Electrical Measurements Remotely

How to Monitor an Electrical Panel without using PPE

This video shows how to:

  1. take measurements remotely away from dangerous equipment(60ft away)
  2. take multiple readings at the same time
  3. record those readings without writing them down
  4. see live measurements from multiple modules simultaneously on one screen
  5. measure AC voltage, AC current and temperature

This is a video that monitors an electrical panel for a Chiller. Normally we would use a power quality analyzer and proper PPE protection… Continue Reading »

What is Traceability?

Traceability can be defined as an unbroken record of documentation (e.g., “documentation traceability”) or an unbroken chain of measurements and associated uncertainties (e.g., “metrological traceability”). When we use the word “traceability” in this paper, we will always mean “metrological traceability.”

The National Institute of Standards and Technology maintains the U.S. national standards for temperature. In other countries, similar national standards laboratories perform the same function.

The readings of a thermometer  like a Continue Reading »

Why Accuracy is Important in Petroleum Chemical Gauging

Many factors are involved in moving or trading bulk volumes of liquid petroleum and other products. The value of the product is usually determined by an independent inspection company who uses their own equipment to calculate the volume, purity and other required specifications. These inspection companies are responsible for providing the most accurate information possible from circumstances which are highly variable.

Within the storage vessel, walls… Continue Reading »

The Difference Between NPT, BSPP and BSPT Seals

Pressure systems in the process industry use different ways of sealing depending on the geographical region, size of the pressure system and the environment. There are regional differences in sealing types as well as industry preferences. For example, many pressure systems onboard ships use BSPP adapters while many applications in the oil and gas industry use NPT fittings. While one sealing style is not inherently better than another each style has its application. Continue Reading »