Physics > HEP > BaBar > LST > Sensors '06

LST Temperature & Humity Sensors

Table of Humidity Connections:

Physical
Status 		EPICS
Status 		GMBInputs Sextant Layer Sensor
Type 		Sensor
# 		Zero
offset
(V) 		Slope
(mV/%RH) 		Accuracy
at 25C
(%RH) 		Ka Kb
connectedmislisted as
RPC Barrel #6 		170-2 3 bubbler
outflow		 ?? ? ?? ??
connectedmislisted as
RPC Barrel #3 		173-5 5 bubbler
outflow		 ?? ? ?? ??
connected ?176-8DIRC DIRC Honeywell
HIH-3602-A		41 0.787 30.5812 0.1574152.905
not connected ?179-11? ? ?? ? ?? ??
connectedconnected1712-1451 Honeywell
HIH-3602-A		1570.836 32.14920.1672160.75
connectedconnected1715-17517Honeywell
HIH-3602-A		2120.86231.92420.1724159.62
connectedconnected1718-20518Honeywell
HIH-3602-A		990.88632.01720.1772160.09
connectedconnected1721-2301Honeywell
HIH-3602-A		1920.87731.34420.1754156.72
connectedconnected1724-26017Honeywell
HIH-3602-A		340.87231.57720.1744157.89
connectedconnected1727-29018Honeywell
HIH-3602-A		870.82332.23820.1646161.19
connected connected250-211Honeywell
HIH-3602-C		 ?0.92032.084 20.184160.42
connected connected253-5117Honeywell
HIH-3602-C		 ?0.920 32.028 20.184160.14
connectedconnected256-821 Honeywell
HIH-3602-A		231 0.87432.18620.1748160.93
connectedconnected259-11217Honeywell
HIH-3602-A		61 0.818 32.15920.1636160.80
connectedconnected2512-14218Honeywell
HIH-3602-A		570.86532.175 20.1730160.88
connectedconnected2515-1731 Honeywell
HIH-3602-A		98 0.872 32.15820.1744160.79
connectedconnected2518-20317 Honeywell
HIH-3602-A		129 0.88132.04420.1762160.22
connectedconnected2521-23318Honeywell
HIH-3602-A		2190.85631.688 20.1712158.44
connected connected2524-2641Honeywell
HIH-3602-A		 ?0.888 31.608 20.1776158.04
connected connected2527-29417Honeywell
HIH-3602-A		 ?0.889 32.146 20.1778160.73

Formula for calculating the relative humidity at 5Vsupply:

RH = (Vout - Offset)/(Slope/1000)

For some reason in EPICS we convert these constants to

Ka = Offset/5
Kb = Slope x 5

Links

Humidity sensor preliminary testing at SLAC
M. I. Lang, SLAC-TN-05-070, (2005).

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Last modified on 27 Nov 2006 by Bradley James Wogsland .