Vaisala DRYCAP
®
Dewpoint Transmitter DMT242
U
SER
'
S
G
UIDE
June
2008
|
M010036EN-D
TECHNICAL SPECIFICATIONS
Dewpoint Temperature
Measurement range
-80 ... +60 °C (-112 ... +140 °F)
DMT242A
-80 ... +20 °C (-112 ... +68 °F)
DMT242B
-60 ... +60 °C (-76 ... +140 °F)
DMT242X free
scaling
When the dewpoint is below 0 C, the transmitter outputs
frost point.
Dewpoint accuracy with
DRYCAP
®
180M
±2 ºC (±3.6 ºF)
(See figure below)
Response time 63 % [90 %] at 20 °C gas temperature at
flow rate > 1 l/min and 1 bar pressure:
-60
→
-20 °C T
d
(-76
→
-4 °F T
d
)
5 s [10 s]
-20
→
-60 °C T
d
(-4
→
-76 °F T
d
)
45 s [10 min]
DRYCAP
®
180S
±2 ºC (±3.6 ºF)
(See figure below)
Operating Environment
Temperature
0 ... +60 ºC (32 ... +140 ºF)
Higher temperature peaks
Short term OK
Relative humidity
0 ... 100 %RH
Pressure
0 ... 20 bar
a
(0 ... 290 psi
a
)
Sample flow rate
no effect
Output
Analog output
4 ... 20 mA
Resolution for analog output
±0.002 mA
Typical temperature dependence
0.0008 mA/ºC
Serial line for service use
RS-232
General
Sensor DRYCAP
®
180M
Operation voltage
17 ... 35 VDC
20 ... 28 VAC
Power consumption 24 VDC
max 220 mA
External load for current
output
max 500
Ω
Optional connection cable
with DMT242 connector
2 m or 10 m
Connector for supply voltage
and signal output
Max wire size
0.75 mm
2
Max wire diameter
6.5 mm/PG7
Service cable for serial line
DMT242RS
Probe material
stainless steel
(AISI 316L)
Sensor protection
stainless steel sintered
filter (HM47280)
Mechanical connection
G1/2" ISO228-1 thread
with bonded seal ring
(U-seal)
Electronics housing
plastic (ABS/PC)
Housing classification
IP 65 (NEMA 4)
Storage temperature range
-40 ... +70 ºC
(-40 ... +158 ºF)
Complies with EMC standard EN61326-1:1997 +
Am1:1998 + Am2:2001; Industrial Environment.
Figure 4 Dimensions in mm [inches]
