Product guide

45
Humidity and Dew-Point Instruments
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
www.michell.com
Environmental Control
Dimensions
DT269
Digital Relative Humidity & Temperature Transmitter, Duct Mount
Accessories and Spare Parts
Al mounting fl ange for ø19mm (0.75”) SS probes
FLA019
SS sintered fi lter H4
ABS cap slotted with PTFE fi lter, white Z2
Hygrosmart without Pt100 output (RH = 0-1 V) I7-0-00-0
Hygrosmart with Pt100 output (RH = 0-1 V) I7-0-00-1
You can check your hygrometer with the Control Kit HKC
which is based on the principle of non-saturated salt
solutions. Refer to technical data sheet CONTROL KIT
HKC
The DT269 transmitter has a I7000 Hygrosmart module.
Thanks to this solution, the sensor can be changed on site
quickly and simply, providing greatly reduced maintenance
costs. The transmitter does not need recalibration after the
sensor is changed.
Highlights
• Designed for accurate measurement in a controlled
environment
• Based on the interchangeable Hygrosmart module
• Temperature output scaling confi gurable on request
• Linearization for a specifi c isotherm on request
Technical Specifi cations
Performance
Measurement range (RH) 0–100% RH
Measurement range (T) -20 to +80°C (-4 to +176°F)
Accuracy at 23°C (73°F)
Humidity
<±2% RH (5–95% RH)
Accuracy at 23°C (73°F)
Temperature
Pt100 1/3 DIN direct ±0.2°C (±0.36°F)
Stability – RH Sensor <±1% RH/year
Response time – RH Sensor <10 sec typical (for 90% of the step change)
Electrical output/input
Output signal (RH)
confi gurable on request
4–20 mA
0–1, 0–5, 0–10 V
Output signal (T)
confi gurable on request
4–20 mA
3-wire 1/3 DIN Pt100 direct
0–1, 0–5, 0–10 V
Supply voltage Output 4–20 mA:
Output 0–10 V:
Output 0–5 V:
Output 0–1 V:
V+ = 12–30 V DC
V+ = 15–30 V DC
V+ = 10–30 V DC
V+ = 8–30 V DC
Load resistance Output 4–20 mA:
Output 0–10 V:
Output 0–5 V:
Output 0–1 V:
Rload < (Uv-9) / 0.02
R > 10 k 
R > 5 k 
R > 1 k 
Current consumption 2 x 20 mA max
Operating conditions
Operating temperature
Probe
Housing
Storage
-30 to +85°C (-22 to +185°F)
-30 to +70°C (-22 to +158°F)
-40 to +70°C (-40 to +158°F)
Mechanical specifi cation
Ingress protection IP65 (NEMA 4 level)
Material PPO + POM
Dimensions
Housing
Probe
80 x 80 x 34.5mm (3.14 x 3.14 x 1.35”)
L=85/178mm, ø19mm (L=3.35/7.01”, ø0.75”)
Weight 100g (3.53oz)
Electrical connections Screw terminals
INTERCHANGEABLE
MODULE
HYGROSMART ®
 PP

PP
PP
PP 
2II  PP

PP
PP
4 Off  3.3mm
(0.12")
Issue No: DT269_97188_V2_UK_1110