Specifications

100 Commerce Way, Woburn, MA 01801
TEL: 1-888-VAISALA (824-7252) FAX: [phone]
E-MAIL: [e-mail] Access catalog on-line at: www.vaisala.com/inc/ssdcat
26
65
145
120
104
133
Ø 6.5
MEASURED VARIABLES
Water activity
Measurement range 0...1
Accuracy (including nonlinearity and repeatability)
when calibrated against salt solutions (ASTM E104-85):
±0.02 (0...0.9) ±0.03 (0.9...1.0)
maximum achievable accuracy when calibrated against
high-quality, certified humidity standards:
±0.01 (0...0.9) ±0.02 (0.9...1.0)
Response time (90 %) at +68°F (+20 °C)
in still oil (with stainless steel filter) 10 min.
Sensor HUMICAP
®
K
Temperature
Measurement range -40...+356 °F (-40...+180 °C)
Typical accuracy of electronics ±0.18°F (±0.1 °C)
at +68°F (+20
0
C)
Typical temperature dependence ±0.0005°F/F (±0.005 °C/°C)
of electronics
Sensor Pt 100 IEC 751 1/3 class B
OUTPUTS
Two analog outputs 0...20 mA
selectable and scaleable 4...20 mA, 0...1 V
0...5 V, 0...10 V
Typical accuracy of analog ±0.05 % FS
output at +68°F (+20
0
C)
Typical temperature dependence 0.003% FS/°F
of analog output (0.005 % FS/°C)
Serial output RS 232C
GENERAL
Connections screw terminals for 0.5 mm
2
wires (AWG 20), stranded
wires recommended
Operating voltage 24 VDC/isolated 24 VAC, (20...28 V)
option 115 VAC, 230 VAC
Recommended external load for
current outputs < 500 ohm
0...1 V output > 2 kohm (to ground)
0...5 & 0...10 V outputs > 10 kohm (to ground)
Operating temperature range for -40140°F (-40...+60 °C)
electronics
with display cover 32122°F (0...+50 °C)
with power supply unit -40113°F (-40...+45 °C)
Storage temperature range -40158°F (140+70°C)
Housing material G-AlSi12 (DIN 1725)
Housing classification NEMA 4 (IP 65)
Bushing for 7...10 mm diameter cables (8 x 0.5 mm
2
shielded cable)
Sensor protection stainless steel filter (Ø 13.5 mm)
OPTIONS
Display cover local display/keypad
2 x 16 characters LCD
Cable length 2, 5 or 10 meters
Alarm relays* 2 pcs 8 A/230 V SPCO
(single pole change over)
Connectors
Serial modules RS 485/422
digital current loop
Power supply module*
Operating voltage 115 VAC (93...127 V)
230 VAC (187...253 V)
Connections
input screw terminal for
1.5 mm
2
wires (AWG 16)
output screw terminal for
0.5 mm
2
wires (AWG 20)
* Simultaneous installation with alarm outputs and internal
power supply module is not possible.
SERIAL INTERFACE MODULES
Module types RS 485/422
digital current loop
Connections screw terminals for 0.5 mm
2
wires (AWG 20), stranded
wires recommended
Assembly plug-in module
Number of devices on line
RS 485/422 32
digital current loop 6 (single loop)
9 (dual loop)
Network cable type twisted pair
Network line length 1000 m max.
Network data speed
RS 485/RS422 9600 baud max.
digital current loop 4800 baud max.
cable length
2, 5 or 10m
PROBE UP
PROBE PUSHED DOWN
adjustment
range
120 mm
178
23.5
ł13.5
ł12
22.5
ł5.5
TECHNICAL DATA - HMP 228
Electronic housing
HMP 228
Installation with
the ball valve set
R 1/2 keg ISO 7/1
(1/2 NPT Adapter available)
stainless steel filter
process pipe
ball valve
(Part. No. DMP 248BVS)
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HMP 228