Monday, August 24, 2009

Fluke Digital Thermometer for Firefighter application (Case Study)

The City of Whitehorse Fire Department in the Northwest Territories of Canada holds three training sessions a week for their combined team of career and volunteer firefighters. Part of that training involves going into the “burn building” - a two-story fabrication structure specially made for practice fires. Trainees must enter the building, locate and extinguish the fire.

“The purpose of the burn building training is to get the firefighters experience in a safe environ¬ment, so they can respond with confidence on a real call,” says Warren Zakus, Training Officer for the Whitehorse Fire Department.

One of the ways Zakus makes sure the environment is safe is using a digital thermometer and thermocouple probes, strategically located within the burn building – on the ceiling and floor of each room, and in the interior stairwell. Using a Fluke 52-II Thermometer with five 80PK-1 beaded probe thermocouples, the firefighters now know the actual temperatures within the building ensuring the safety of the trainees, and also providing them with valuable information.

“Part of the purpose of using the digital thermom¬eter is to keep everyone safe. The other is to be able to truly educate the trainees on exactly how hot the environment will be as a fire passes though different stages,” says Zakus. “They can really feel what they will be facing in the field and they know how to react.” Zakus says the thermometer and probes also allow him to bet¬ter control the environment and ensure it is suitable to the level of experience of the group he is training at the time.

“We start the volunteers out at lower temperatures and easier tests than the kind of training we would do with a career veteran of the department.” Zakus chose the Fluke 52-II for several reasons. “When it came down to selecting a thermometer for our training sessions, I wanted one with dual displays so we can see two readings at a time and compare temperatures at the ceiling and floor during the same fire. I also wanted the data logging and recording for comparison between sessions. I found the Fluke 52 had all the features I needed,” he says. “And I already owned a couple of Fluke tools for my personal use, so I knew they were really high quality and would stand up to the environment.”

Despite having “melted lots of stuff in the past” in the burn building, Zakus says the Fluke probes have stood up to the test so far. “They get sooty sometimes, but they’ve never been damaged. I know they’re used in other fire-related industries too, like build¬ing materials testing for firewalls and fire doors.”

Tuesday, August 18, 2009

Non-contact temperature measurements using IR thermometers

Infrared (IR) thermometers allow non-contact measurement of surface temperatures by analyzing the invisible, infrared spectrum emitted from an object. IR measurement devices, like the Fluke 61and 65, make it safe to take surface temperature readings of items like rotating, hard-to-reach, electrically live, or dangerously hot targets. For preventative maintenance tasks, they cut measurement time to almost zero with the ability to take a surface temperature reading in less than one second.


IR thermometers can be used to conduct thousands of different types of measurements, including:

Electrical: IR thermometers can be used to troubleshoot problems with electrical connections and verify uninterruptible power supplies by locating hot spots in the output filters or dc battery connections. They can also be used to check components in battery banks, power panel terminations, ballasts, switch gears, circuit breaker and fuse connections that could be draining energy due to the heat created by loose connections or corrosion buildup.

Preventive maintenance: Using IR thermometers for preventive maintenance measurements of hard-to-reach equipment such as HVAC supply diffusers or dangerous equipment like motors, generators, and bearings helps identify potential problems.

HVAC: It’s estimated up to 30 percent of air conditioning leaks are due to faulty ducting, which can be quickly and easily detected with an IR thermometer.

Steam: IR thermometers are particularly useful in taking surface temperature measurements of uninsulated steam lines, steam valves, fittings, receiver tanks, and condensate return lines, which pose a large safety hazard due to the potential presence of live steam.

mA measurements without breaking the loop


Fluke Milliamp Process Clamp Meters 772 and 773 expand upon the capabilities of the popular 771 mA Clamp Meter. Now all you have to do is decide which model will help you save the most time.


The Fluke 771, 772 and 773 features:
• Best in class 0.2 % accuracy
• 0.01 mA resolution and sensitivity
• Measure 4 to 20 mA signals without ”breaking the loop”
• Measure mA signals for PLC and control system analog I/O
• Dual backlit display with both mA measurement and percent of 4 to 20 mA span
• Measurement Spotlight illuminates hard to see wires in dark enclosures
• Detachable clamp with extension cable for measurements in tight locations
• Measure 10 to 50 mA signals in older control systems using the 99.9 mA range
• Automatically change the 4 to 20 mA output for remote testing
• Power saving features, auto-off, backlight timeout extend battery life
• Hold function captures and displays changing measurements


772 and 773 add:
• Measure 4 to 20 mA signals with in-circuit measurement
• Simultaneous mA in-circuit measurement with 24V loop power for powering and testing transmitters
• Source 4 to 20 mA signals for testing control system I/O or I/Ps
• mA output linear ramp or 25% step output
• Automatically change the 4 to 20 mA output for remote testing

Monday, August 3, 2009

Extra functions make testing faster, with same rugged Fluke design


The new Fluke 1650B multifunction electrical installation testers have additional features that can halve the time for installation testing. Built on the rugged performance of our earlier 1650 Series, the Fluke 1650B Series testers verify domestic, commercial and industrial electrical installations. They ensure that fixed wiring is safe and correctly installed to meet IEC 60364, HD 384 and local requirements like BS7671 (17th Edition).

The Fluke 1650B has a dual display to show two measurements at once. On its own that can more than halve the test time taken by other loop testers, for example showing PEFC/PSC and loop impedance in parallel. A new high-current loop mode further reduces the times taken by loop tests with non-trip mode for RCDs. Fast voltage measurements between L-N, L-PE and N-PE use the mains cord, so there is no need to change measurement connections.

A rotary dial knob controls all the major functions, clearly showing which one is selected, and avoiding the need for complex multi-level menus. The large backlit display has an exceptionally wide viewing angle for safe, easy readings even under difficult conditions. RCD tests have a simple PASS/FAIL indication, with a variable RCD current mode for customized settings. An Earth Volt Touchpad shows potentially dangerous fault conditions by detecting earth voltages above 50 V.

Equipped with a built-in memory, the 1653B can store test results quickly and easily on site without needing any additional devices. Each stored measurement consists of the test function and user selectable test references like cabinet and circuit number. Simply upload the data after testing to a computer for preparing professional reports.

The 1650B is rugged (withstanding a 1-m drop), compact, and lightweight (weighing below 1.2 kg). A padded neck strap frees testers’ hands for comfortable all day testing. All 1650B models have detachable standard 4-mm leads so that damaged test leads can be replaced easily by other 4-mm standard accessories. A slim, remote probe is powered by the tester (so needing no extra batteries), and lets test engineers keep their eyes on the panel while probing hard to reach points. A new accessory comes with the tester: the Zero Adapter ensures accurate, reliable and simple test lead and mains cord compensation. The adapter takes all kinds of mains plugs and test accessories like probes and alligator clips.