Technical Specifications; Environmental Conditions; Physical Specifications; Figure 1 : Operating Areas - Honeywell STT25D Operator's Manual

2. TECHNICAL SPECIFICATIONS

2.1

Environmental Conditions

Reference
Temperature 23°C 73°F
Humidity 10 to 55
(%RH)
Supply 24 V /
250 Ω
voltage
Shock/
Vibration
CE MARK compliance:
In compliance with EMC directive 89/336/ECC:
- without shielded wires 10 V/m, 0.1% of Max span
- with shielded wires and mounted in metallic housing: 30 V/m,
0.1% of max span.

2.1.1 Physical Specifications

The STT250 is available in 3 physical variations to suit various application
requirements.
Load resistance
(Ohms)
1100 operating communication area
250
0
0
10.8 16.3
DE operating area
2
Rated
conditions
-40°C to 85°C
-40°F to 185°F
5 to 95
operating area
communication
Supply
voltage
35 V

Figure 1 : Operating Areas

Smart Temperature Transmitter STT250 – Operator Manual
Operating limits
-40°C to 85°C
-40°F to 185°F
5 to 100
(See Figure 1)
40 g max
4 g max over
15-200 Hz (3 g
with meter)
Load resistance
(Ohms)
operating communication area
1100
with no
100
0
(Vdc)
0
10.8 13
Storage
-50°C to 100°C
-58°F to 212°F
5 to 100
HART operating area
operating area
with no
communication
Supply
voltage
(Vdc)
35 V