For HVAC Techs
Here's a nice Tool of the future
http://www.testousa.com/557/ http://www.testousa.com/557/images/557.jpg The new testo 557 Refrigeration System Analyzer technical data <table border="0" cellpadding="0" cellspacing="0"> <tbody><tr> <td class="leftcol" align="left" valign="middle"> Pressure </td> <td align="left" valign="middle"> kPa / MPa / bar / psi </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Temperature </td> <td align="left" valign="middle"> °C / °F / K </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Vacuum </td> <td align="left" valign="middle"> hPa / mbar/ Torr / inH2O / Micron / inHg / Pa </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> SENSORS: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Pressure </td> <td align="left" valign="middle"> 2 x pressure sensors </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Temperature </td> <td align="left" valign="middle"> 2 x NTC </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Interfaces </td> <td align="left" valign="middle"> 3 x 7/16" UNF, 1x 5/8" UNF, NTC measurement </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> MEASURING RANGES: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Pressure HP/LP(rel): </td> <td align="left" valign="middle"> -14.7 to 725 psi / -100 to 5000 kPa -0.1 to 5 Mpa / -1 to 50 bar </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Temperature: </td> <td align="left" valign="middle"> -58 to 302°F / -50 to +150°C </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Vacuum (rel) </td> <td align="left" valign="middle"> -1 to 0 bar </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Overload pressure </td> <td align="left" valign="middle"> 52 bar, 5200 kPa, 5.2 Mpa, 754 psi </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> RESOLUTION: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Pressure </td> <td align="left" valign="middle"> 0.01 bar / 0.1 psi / 1 kPa / 0.001 Mpa </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Temperature </td> <td align="left" valign="middle"> 0.1°C / 0.1°F </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Vacuum </td> <td align="left" valign="middle"> 1 hPa / 1 mbar / 0.5 Torr / 0.5 inH2O / 0.02 inHg / 500 Micron / 100 Pa </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> ACCURACY (@ 22°C/71.6°F): </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Pressure </td> <td align="left" valign="middle"> ±0.5% fs (±1 digit) </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Temperature </td> <td align="left" valign="middle"> ±0.5 °C (±1 digit) </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Vacuum </td> <td align="left" valign="middle"> ±1% fs (±1 digit) </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> No. of refrigerants </td> <td align="left" valign="middle"> 40 </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Selectable refrigerants </td> <td align="left" valign="middle"> no refrigerant, R12, R22, R123, R134a, R227, R290, R401A, R401B, R402A, R402B, R404A, R406A, R407A, R407C, R408A, R409A, R410A, R411A, R413A, R414B, R416A, R417A, R420A, R421A, R421B, R422A, R422B, R422D, R424A, R427A, R434A, R437A, R438A, R502, R503, R507, R600, R600a, R718, R744 (only up to 50bar / 725psi), R1234yf (display: T8) </td> </tr> </tbody></table> <table border="0" cellpadding="0" cellspacing="0"> <tbody><tr> <td class="leftcol" align="left" valign="middle"> Measurable media </td> <td align="left" valign="middle"> Measurable media: All media that are stored in the testo 557. Not measurable: Ammonia (R717) and other refrigerants which contain ammonia </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> AMBIENT CONDITIONS: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Operating temperature </td> <td align="left" valign="middle"> -20 to 50°C / 14 to 122°F </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Storage temperature </td> <td align="left" valign="middle"> -20 to 60°C / -4 to 140°F </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Humidity application range </td> <td align="left" valign="middle"> 10 to 90 %RH </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> HOUSING: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Material </td> <td align="left" valign="middle"> ABS / PA / TPE </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Dimensions </td> <td align="left" valign="middle"> approx. 11.02 x 5.3 x 3.0 in </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Weight </td> <td align="left" valign="middle"> approx. 3 lbs (without batteries) </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> IP-class </td> <td align="left" valign="middle"> 42 (hanging) </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> POWER SUPPLY: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Current source </td> <td align="left" valign="middle"> Rechargeable batteries / batteries 4x 1.5 V, type AA / mignon / LR6 </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Battery life </td> <td align="left" valign="middle"> approx. 150 h (no display ilumination) </td> </tr> <tr> <td colspan="2" class="header" align="left" valign="middle"> DISPLAY: </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Type </td> <td align="left" valign="middle"> illuminated display </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Response time </td> <td align="left" valign="middle"> 0.5 s </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Directives, standards and tests: </td> <td align="left" valign="middle"> EC Directive: 2004 / 108 / EC </td> </tr> <tr> <td class="leftcol" align="left" valign="middle"> Warranty Duration: </td> <td align="left" valign="middle"> 2 years warranty conditions: see website www.testo.com/warranty </td> </tr> </tbody></table> The new testo 557 Refrigeration System Analyzer is designed to save you http://www.testousa.com/557/images/557b.jpg |
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Nice info :wave:
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Good to have you here and enjoy the site.
I have you all set :thumbs_up: |
Extech Introduces HDV600 High-Definition VideoScope Series
Designed for use in practically any environment, Extech's durable HDV600 high-definition borescope camera series features a 5.7" (145mm) color display for bright outdoor sites or poorly lit facilities. Optics include 4mm-6mm LED-illuminated camera probes and SD memory stores 15,000 JPEGs or video -- plus audio annotations. Glove-friendly controller handsets with 320˚ articulated probes and wireless connectivity (10m range) simplify inspections. HDV600 videoscopes are designed for ruggedness, upgradeable versatility, and high-definition clarity. http://ww1.prweb.com/prfiles/2011/09...borescopes.jpg More info on site and has a video to see how it works. :wave: http://www.prweb.com/releases/extech...web8762112.htm |
VFD Info
Square D http://products.schneider-electric.u...re-d-products/ ABB http://www.abb.us/drives Danfoss http://www.danfoss.com/north_america...rivesSolutions Toshiba http://www.toshiba.com/ind/ AC Tech Drives http://www.actechdrives.com/ VTAC http://www.vtacdrives.com/ |
Nice Techman :twothumbsup[1]:
VFD-101 for the HVAC Market This collection of lessons covers some of the basic information needed to understand the installation and operation of Variable Frequency Drives for the HVAC market in fan applications. In front of each lesson there is a series of short questions. If you can answer most of these questions correctly, then skip this lesson and go to the next. At the end of each lesson there is an evaluation test insuring that you have properly assimilated the information. http://www.danfoss.com/North_America...VAC+Market.htm |
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For Those wanting to learn DDC
Here's a site to help :thumbs_up: http://www.ddc-online.org/default.html |
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