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Vaisala HUMICAP HMT330 SERIES Manual de usuario Pagina 2

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11Vaisala Instruments Catalog 2009
Ref. B210768EN rev. A
HMT330 SERIES
HUMIDITY
DEWPOINT
°C
°C
0
0-80 -60 -40 -20 20 40 60 80 100 120 140 160
180
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Performance
Relative humidity
Measurement range 0 ... 100 % RH
Accuracy (including non-linearity, hysteresis, and repeatability)
with Vaisala HUMICAP® 180 or 180R for typical applications
with Vaisala HUMICAP® 180C or 180RC for applications with
chemical purge/warmed probe
at +15 ... +25 °C (59 ... +77 °F) ±1 %RH (0 ... 90 %)
±1.7 %RH (90 ... 100 %RH)
at -20 ... +40 °C (-4 ... +104 °F) ±(1.0 + 0.008 x reading) %RH
at -40 ... +180 °C (-40 ... +356 °F) ±(1.5 + 0.015 x reading) %RH
Factory calibration uncertainty (+20 °C) ± 0.6 % RH (0 ... 40 %RH)
± 1.0 % RH (40 ... 97 %RH)
(Dened as ±2 standard deviation limits. Small
variations possible, see also calibration certificate.)
Response time (90 %) at +20 °C (+68 °F) in still air
8 s / 17 s
*
with grid lter
20 s / 50 s
*
with grid + steel netting lter
40 s / 60 s
*
with sintered lter
*
with HUMICAP® 180R or 180RC sensor
Temperature
Measurement range
HMT331 -40 ... +60 °C (-40 ... +140 °F)
HMT333 -40 ... +80 °C or -40 ... +120 °C
(-40 ... +176 °F or -40 ... +248 °F)
HMT334, HMT335, HMT337,
HMT338 -70 ... +180 °C (-94 ... +356°F)
Accuracy at +20 °C (+68 °F) ± 0.2 °C (± 0.36 °F)
Accuracy over temperature range
Temperature sensor PT 100 RTD 1/3 Class B IEC 751
Other variables available (depends on model)
dewpoint temperature, mixing ratio, absolute humidity, wet bulb
temperature, enthalpy, water vapor pressure
Technical Data
with optional power supply module 100 ... 240 VAC, 50/60 HZ
Power consumption at +20 °C (U
in
24 VDC)
RS-232 max. 25 mA
U
out
2 x 0 ... 1 V/0 ... 5 V/0 ... 10 V max. 25 mA
I
out
2 x 0 ... 20 mA max. 60 mA
display and backlight + 20 mA
during chemical purge max. 110 mA
during probe heating (HMT337) + 120 mA
Analog outputs (2 standard, 3rd optional)
current output 0 ... 20 mA, 4 ... 20 mA
voltage output 0...1 V, 0...5 V, 0...10 V
Accuracy of analog outputs at +20 °C ±0.05% full scale
Temperature dependence
of the analog outputs ±0.005%/°C full scale
External loads
current outputs R
L
< 500 ohm
0 ... 1 V output R
L
> 2 kohm
0 ... 5 V and 0 ... 10 V outputs R
L
> 10 kohm
Max. wire size 0.5 mm
2
(AWG 20)
stranded wires recommended
Digital outputs RS-232, RS-485 (optional)
Service connection RS-232, USB
Relay outputs (optional) 0.5 A, 250 VAC
Ethernet interface (optional)
Supported standards 10/100Base-T
Connector RJ45
Protocols Telnet
Software support Vaisala MI70 link
WLAN interface (optional)
Supported standards 802.11b, 802.11g
Antenna connector type RP-SMA
Protocols Telnet
Security WEP 64/128,WPA
Software support Vaisala MI70 link
Authentication / Encryption
Open / no encryption
Open / WEP
WPA Pre shared key / TKIP
WPA Pre shared key / CCMP (a.k.a. WPA2)
Optional data logger with real-time clock
Logged parameters max. three with trend/min/max values
Logging interval 10 sec ( xed)
Max. logging period 4 years 5 months
Logged points 13.7 million points per parameter
Battery lifetime min. 5 years
Display LCD with backlight,
graphic trend display of any parameter
Menu languages English, Chinese, Japanese, Spanish,
German, French, Swedish, Russian, Finnish
Inputs and outputs
Operating voltage 10 ... 35 VDC, 24 VAC
Flexible calibration
e HMT330 instruments are calibrated
at six humidity points at the factory.
A quick, one-point eld calibration can
be performed with the hand-held HM70
meter. A two-point calibration can be
performed with the HMK15 salt bath
calibrator in a controlled environment.
e transmitter can be sent to Vaisala
for recalibration. Accredited calibrations
and maintenance contracts are also
available.
e Vaisala HUMICAP® Hand-Held Humidity
and Temperature Meter HM70 is ideal for
field checking HMT330 transmitters.
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