Hello guys, I need help in powering on this instrument with a portable battery pack.
The instrument needs a power supply of :

Power Requirement: 100 − 127V and 200 –240V
(50 – 400Hz) ±10% AC. Complies with IEC536
Class 1 Safety Standards.
Power Consumption: ~100VA.

I contacted the manifacture and they told me that I could do this:

<font size="2" face="Verdana" color="blue"><span style="font-size: 10pt; font-family: Verdana; color: blue;">The power supply in the gas monitor runs from 100 to 240 V and I guess the most convenient for you in the US would be to get hold of a 12V to 120V converter and connect it directly to the AC connector on the instrument. The gas monitor uses ~120W</span></font>


I google this
<h1>12V DC to AC 400 Watts Inverter <span class="x">(PI-400)</span></h1>
http://www.dcacpower.com/product/400w.html

and I think I should buy a 12 Volt battery car and a car battery charger.

http://www.atbatt.com/c/lead-acid.as...max_value=3000

http://www.adaptelec.com/powerbright...city-p-67.html

Would this setup work ?

I have few other questions:

1) the Inverter is 400W , will it blow up the instrument , since the instrument need just 150 W ?

2) Can u pls suggest a battery to buy (watt , amperage ecc...)

3) how long will the battery pack last ?

4)I ned it to be as portable as possible (as light it could be)

5) the only mistake that I can make to frie the instrument is if I just invert + and - , correct ?

Thank you