After the "unpacking" is everything in front of you, you need to first measure, fortunately also good brand batteries GP (with me MHD 08/2015) - two daily AA alkaline cells. According to the manual also batteries can be used, however, what I regard as unnecessary. The battery has a voltage of 1.2V and must be changed more often. Furthermore, the self-discharge is a problem when the meter is not used continuously.
Meter, pocket (in the form of a holster), batteries, Quick Start Guide and a detailed instruction manual are in detail.
The operating instructions:
The Quick Start Guide consists only of little pictures and is really just inserting the battery and the first "play" with the instrument.
To use the meter, the manual must be read carefully. The Quick Start Guide is referenced throughout the book, as important points such as the emissivity will not be described.
The so-called original instructions is a 14-language A5 booklet that familiarizes printed on the first 10 pages of small with the meter.
As this booklet safe when you are not working for some time with the device, is read more often, a higher quality paper I would have preferred, as the gray cheap acting recycled paper, but environmental protection must indeed be shown in the packaging.
The instructions are easy to understand, has a glossary, in which the technical terms used are explained and shown with sketches of the device and functions. A slightly larger font size, I would have felt more than safe, but this is subjective.
Objectively, however, that in my view, a lot of background knowledge is required.
The measurement method:
For the measurement of surface PTD1 uses the infrared measurement method.
The description in the often verwendetet word "Laser" has nothing to do with the temperature measurement. The laser is only used to define the measuring point, ie the point at which the lens of the "optical" sensor is being held.
The non-contact infrared measurement measures nothing but the invisible long-wave light, heat radiation, which raises this point.
Here is the main problem of the measurement because any substance raises this heat radiation back different technical term emissivity.
A wall has untapeziert another emissivity than the same wall with wallpaper and this may also be deleted.
An example to understand: The papered walls has the same surface temperature as the metal piece that is glued to it, but you notice when you hold your hand in front of it without touching both a difference, just different emissivity at the same temperature.
So you have to make before each measurement thinking about the material that you want to measure, otherwise the temperature displayed is wrong.
Measurement accuracy:
The measurement accuracy of PTD1 is very good, even better than indicated in the table of instructions.
The most accurate is the ambient temperature is measured with a thermocouple in the device front, followed by the even front internally measured rel. Humidity. An adjustment of about 1 minute at the respective space is required.
The non-contact surface temperature measured is also perfectly acceptable (compared with a calibrated Testo surface thermocouple).
The figure often shown a measurement of the surface temperature of radiators I could not understand. The display of PTD1 was too high for me always at least 8 ° C. It just was not the right emissivity settings for my light gray painted radiator ...
The Measurement:
Ingrain wallpapered, painted white walls show the skill of the instrument. Especially places where show beginnings of mold provided conclusive measurement results that show what you think is a great device in his hands.
Interestingly, the meter is not only in the physics / biology, but also in other everyday. The nonstick skillet on the stove can be (up to 200 °) as well as measure of Kat your car or ...
Here's a practical example:
Four pans have the same surface temperature of 17.0 °.
The PTD1 shows in the stainless steel pan 18.4 ° and (coated stainless steel, 5mm aluminum coated, aluminum-coated 1.5mm) at the three other pans 16.3 °.
The emissivity was supposed to be medium / low only reduces the temperature to 15.5 °.
The three emissivities are sadly fixed. Schön would be a fourth setting in which you can enter the value for yourself what makes the operation more complicated, of course.
The display ...
... Is sharp and easy to read, but could be more scratch resistant.
The Carrying Case ...
... Indicates a loop that is my view on the wrong side. So the grip is taken right to the front, or they would have left the belt wear.
Conclusion:
A versatile instrument from the idea, only you have to also make some thoughts on what and where you just want to measure.
The table of emissivity values in the manual is both quite short, on the other hand agree that temperatures sometimes not with my comparison values match.
Patterned wallpaper is set to "high", easily patterned on "medium", which is when the sandstone or stucco not rough (setting "high") but is smooth, at the latest one is its measurement not sure.
For comparative measurements of known materials, for example, all painted woodchip equal, the unit works great.
I have used it in the last few days in various houses (much to the annoyance of the broker) and was just able to prove the formation of mold in the newly renovated rooms. Of course this is particularly simple if the outside temperature is very low, the temperature difference between heated space and outside is very large, so the cold bridge is easily detectable.
In midsummer, the detection is impossible.
++ Good accuracy
++ Versatile
++ Excellent workmanship
++ Running quickly
++ Case and batteries here
++ Requires common AA batteries
o without Rating: ./.
- "Burglar-proof" packaging
- Technical knowledge required
- Is uncertain whether the respective measured value is correct
--- A freely programmable emissivity is missing in my opinion,
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