Category Archives: Refrigeration Products

Testo 523, 556, 560 and related products

The Service Assistant by Field Diagnostic Systems Inc.

Introducing one of the most advanced tools EVER to hit the HVACR market:

fielddiagnosticshvacserviceasstThe Service Assistant by Field Diagnostic Systems Inc.

The true power of the Service Assistant by Field Diagnostic Services is readily apparent when you review the reports that are possible.

Commercial Green Report

Executive Report Commercial (2)

Residential Exec Summary

Service Assistant Brochure

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Filed under A/C and Heat Pump Products, Airflow, HVAC, New Product Release, Refrigeration Products

What’s HOT in the TOOL world! – Bill Spohn to speak at ACCA Western-PA meeting – Oct. 4

Bill Spohn from TruTech Tools will be demonstrating what’s new in the world of HVACR tools and test instruments.

Also presenting will be representatives from Ritchie/Yellow Jacket, Hilti Tools, and United Rentals.
And meet the “Student of the Month” from Triangle Tech!

Mark your calendar and be sure to join us!

Peter’s Place
1199 Washington Pike, Bridgeville, PA 15017
(Exit 55 off I79N or I79S)

3:00 pm – Board Meeting
5:30 – 6:00 pm – Social Hour (cash bar)
6:00 pm – 7:00 pm – Guest Speakers
7:00 pm – Social Hour restarts (cash bar)
7:00 pm Dinner – $40.00 (cash, check, credit card)

Dinner Selection: Prime Rib or Virginia Spots

RSVP: 724-779-1860 (phone or fax) – NO cancellations after October 2

SEE ACCA W-PA October 2012 meeting notice FOR SIGN UP FORM AND MORE DETAILS.

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Filed under A/C and Heat Pump Products, Airflow, Combustion Analysis, Customer benefits, Energy Audit, Refrigeration Products, Training, Uncategorized

TruTech Adds Fieldpiece ™ Line

HVAC/R Contractors Offered More Cost Effective Instrumentation Choices
TruTechTools Adds Fieldpiece™ Line
Akron, OH (July, 2012) – TruTech Tools announces the addition of the Fieldpiece™ line of instrumentation to their online catalog.
Fieldpiece is the originator of the modular digital multimeter. The “stick” style digital multimeter (DMM) combined with accessory heads makes it easy to make electrical readings in the field plus enables technicians to easily test a wide range of other parameters.

The new Fieldpiece offering at TruTech Tools represents the progress made over twenty years of developing hand held instruments exclusively for the HVAC/R technician. Most of the Fieldpiece tools on the TruTech site are new or are significant upgrades from their predecessors. Each product has key features built-in that are needed by the HVAC/R technician. Fieldpiece products incorporate high versatility, cost effectiveness, and high field utility.

TruTech’s CEO and Co-Owner, Bill Spohn, notes, “We like Fieldpiece because it is designed for HVAC/R and not adapted to it. Fieldpiece meters offer the features HVAC/R technicians need and they work the way most technicians would expect. Modular expandability works very well for many customers. With many Fieldpiece products you can buy what you need now and look towards future modular upgrades as you can afford them.”

Founded in 2007, TruTech Tools serves the HVAC, Energy Audit, Building Performance, Weatherization and Home Inspection markets providing the best equipment, training, calibration and consulting services available. Find a complete listing of TruTech Tools instrumentation, training and services at

TruTechTools, Ltd.


Filed under A/C and Heat Pump Products, Combustion Analysis, Refrigeration Products, Uncategorized

500 Microns in 51 Seconds

YES YOU CAN! Check out Jim’s VIDEO on how to attach and use TruTech’s new RapidEvac Kit.

  • Pull a Vacuum 10x faster
  • Stay organized and productive
  • Stop Compressor Failures in their Tracks
  • Save Time and Labor Costs

These kits include the best of the best so you can have the right tools at your fingertips everytime. Learn more about RapidEvac Kits HERE.

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Filed under A/C and Heat Pump Products, Refrigeration Products, The Future, Training, Uncategorized

Testo 550 A/C Troubleshooting Guide and more….

TTT testo 550 troubleshooting guide

Testo 550 Common QandA or FAQs

testo 550-Quick-Start-Guide

testo 550 instruction manual


Filed under A/C and Heat Pump Products, Refrigeration Products, Uncategorized

523 556 560 Temperature Measurement

The Pt100 temperature probe on the Testo 500 series refrigeration instruments has been carefully designed to work under a wide range of applications while providing the fastest temperature response in the industry. The platinum based 4 wire construction of the sensor has exceptionally low mass and is shielded from electrical interference from ghost voltages or static electricity that are both common in refrigeration systems. When plugged into the instrument, an o-ring provides a liquid tight seal that will protect the instrument from water damage in the elements.

By design, the ceramic sensor only requires a slight pressure to achieve positive contact with the refrigerant line to get an accurate temperature response.  Because the temperature probe is constructed of ceramic, a very hard material, the probe has a tendency to rotate easily, and even by its own weight. Adjusting the tension of the spring to increase the clamping force is not recommended because it could crack the brittle ceramic sensor. (We found out the hard way!)  Adjusting the clamping force will have little effect on the grip of the sensor as it is the hardness of the materials used for construction that do not allow it to grip the line. If desired, a small piece of 1/8” silicone can be places around the probe clamp to curtail this problem. We found this especially helpful when working on smaller refrigeration systems.

 Because the resistance of a Pt100 sensor bears an absolute relationship to temperature, unlike a thermocouple whose output depends on the difference between the hot junction and cold junction or a thermistor that is not linear over a wide temperature ranges, no special compensating circuit needs to be provided in the electronics. In short, the Pt100 has a wide operating range, excellent accuracy, good linearity, excellent physical strength, long-term stability, and is the preferred sensor for all industrial processes where accuracy and repeatability are required.

Pt100 probes may be replaced without recalibration of the RSA instruments.  Sensors are available in lengths up to 40 feet. The Velcro-elastic strap provides insulation from ambient air along with positive contact to the refrigeration line from ¼” to 3” in diameter. Air and immersion probes are available to further enhance your testing applications.   

When measuring temperature probe position becomes critical for accurate troubleshooting. The Testo 500 series is designed to provide real-time measurement of pressure and temperature, and will respond to even the slightest variances in line temperature due to refrigerant flashing in the suction line (slugging). 

 Oil traveling back to the compressor at the bottom of horizontal runs will also affect the temperature measurement as oil is an excellent insulator.  When checking a TXV equipped system, we recommend that the probe is mounted with the temperature sensor in line with the thermostatic sensing element of the valve (Usually 3-7 o’clock) as close to the element as possible. This will provide the most accurate information on the TXV operation. When measuring liquid line temperature, the clock position of the probe is not critical.






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Filed under Refrigeration Products

Testo A/C Applications Guide

Testo Application Guide The Testo A/C Applications Guide is an invaluable resource for every techncian from entry level to senior.

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Filed under Refrigeration Products