Glossary entry (derived from question below)
Spanish term or phrase:
mm d.c.a.
English translation:
water head (mm)
Added to glossary by
TechLawDC
Aug 12, 2011 20:34
13 yrs ago
1 viewer *
Spanish term
mm d.c.a.
Spanish to English
Science
Metrology
pressure measurement
About measurement of overpressure in a clean room.
Proposed translations
(English)
5 +1 | water head (mm) | psicutrinius |
Proposed translations
+1
21 mins
Selected
water head (mm)
The original means "milímetros de columnha de agua". 1 atmosphere = 10,33 METERS of water head
Peer comment(s):
agree |
José J. Martínez
: but check the mm, they might not be millimeters, but meters instead
5 hrs
|
Yes, they say mm, as far as I know. Certainly, an overpressure expressed in mm c.d.a is a low one. And that's precisely why this unit is used
|
4 KudoZ points awarded for this answer.
Comment: "Gracias."
Discussion
It is defined as the pressure exerted by a column of water of 1 cm in height at 4 °C (temperature of maximum density) at the standard acceleration of gravity.
This unit is commonly used to specify the pressure to which a CPAP machine is set after a polysomnogram.
1 cmH2O = 98.0638 pascals
≈ 0.98064 mbar or hectopascals
≈ 0.39370 inH2O
≈ 0.00096781 atm
≈ 0.73554 torr
≈ 0.73554 mmHg
≈ 0.028958 inHg
≈ 0.014223 psi
Metro de columna de aguaDe Wikipedia, la enciclopedia libre
Saltar a: navegación, búsqueda
Unidad de presión del Sistema técnico de unidades, y equivale a la presión ejercida por una columna de agua pura de un metro de altura. Es un múltiplo de la unidad columna de agua. Su símbolo es m.c.a.
También se utiliza el milímetro de columna de agua (mm.c.a.)
Su equivalencia es:
1 m.c.a. = 0,1 kg/cm² = 9,81 kPa (kilopascal)
1 m.c.a. = 1000 mm.c.a.