
91
Technical data
Measured values
WATER ACTIVITY
Measurement range a
w
0 ... 1
Accuracy (including non-linearity,
hysteresis and repeatability)
0 ... 0.9 ±0.02
0.9 ... 1.0 ±0.03
Response time (90 %) at +20 ˚C in still oil
(with stainless steel fi lter)
10 min
Sensor Vaisala HUMICAP
®
TEMPERATURE
Measurement range -40 ... +180 ˚C (-40 ... +356 ˚F)
Typical accuracy at +20 ˚C ±0.1 ˚C (±0.18 ˚F)
Typical temperature dependence
of electronics ±0.05˚C/ ˚C (±0.005 ˚F/˚F)
Sensor Pt100 IEC751/3 class B
Electrical connections
Two analog outputs, selectable and
scalable 0 ... 20 mA or 4 ... 20 mA
Typical accuracy of analog output at +20 ˚C ±0.05 % full scale
Typical temperature dependence
of analog output
0.005 %/˚C (0.003 %/˚F)
full scale
Serial output RS-232C
Connections 8-pole connector with RS-232C, current
outputs (two channels) and U
in
Operating voltage U
in
24 VDC (10 ... 35 VDC)
Minimum operating voltage U
in
with RS-232C 10 VDC
I
out
0 ... 20 mA, 4 ... 20 mA 11 VDC + (R
load
/60) VDC
Power consumption at +20 ˚C, U
in
= 24 VDC
with RS-232C 20 mA
I
out
2 x 0 ... 20 mA 60 mA
General
Operating temperature range for
electronics -40 ... +60 ˚C (-40 ... +140 ˚F)
Storage temperature -55 ... +80 ˚C (-67 ... +176 ˚F)
Pressure range for MMT318 with ball
valve up to 120 ˚C 0 ... 40 bar
Pressure range for MMT317 0 ... 10 bar
External load R
1
<500 Ohm
Material
transmitter housing G-AlSi 10 Mg
transmitter base ABS/PC
Housing classifi cation IP65
to be protected from direct rain
Cable feed through alternatives 8-pole connector with 5 m cable,
female 8-pin connector screw
joint for cable diameter 4 ... 8 mm
Sensor protection stainless steel grid
Probe cable length
MMT317 0.5, 2, 5 or 10 meters
MMT318 2, 5 or 10 meters
Probe installation MMT317
Swagelok
®
NPT 1/2”, ISO 3/8” or ISO 1/2”
Probe installation MMT318
Fitting bodies ISO 1/2”, NPT 1/2”
Ball Valve Set BALLVALVE-1
Complies with EMC standard EN61326-1, Industrial environment
Note: When using the current output, the RF fi eld susceptibility
level according to standard EN61000-4-3 with a frequency band
of 110 ... 165 MHz, is only 3 V/m (generic environment) with the
specifi ed accuracy.
HUMICAP
®
is a registered trademark of Vaisala.
Ref. B210831EN-A ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifi cations — technical included — are subject
to change without notice.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
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