IE-SNC-T33(4)11+T73(4)10-07
3
temperature unit:
°C
pressure unit:
hPa
preset computed value:
dew point temperature
correction for altitude:
0 hPa
(absolute pressure)
Device installation
Device is designed for wall mounting. There are two mounting holes at the sides of the case. It
is NOT recommended to use the device for long time under condensation conditions. It could be the
cause of water steam condensation inside the sensor’s cover into water phase. This liquid phase
stays inside sensor’s cover and can’t escape from the cover easily. It can dramatically increase
response time to relative humidity change. If water condensation occurs for longer time it can cause
sensor damage. Similar effect can occur under water aerosol conditions. Don’t connect device while
power supply voltage is on. Interconnection terminals for T3311, T3313, T7310, T3411 and T7410
devices are accessible after unscrewing four screws and removing the lid. Lace the cable through a
gland at the case wall. Connect the cable to terminals with respecting the signal polarity (see
figure). Terminals are self-clamping and can be opened by a suitable screwdriver. For the opening,
insert the screwdriver to smaller terminal hole and lever by him. Do not forget to tighten glands and
case lid with inserted packing after cables connecting. It is necessary for warranting of protection
IP65. Connect complementary female connector for T3311L, T3313L, T7310L, T3411L and
T7410L transmitters in accordance with the table in Appendix B of this manual. Working position
is with the sensor filter downwards – see figure.
Devices T3311, T3313 and T7310 are supplied with connection cable equipped with
connector for connection to RS232 interface. For devices with RS485 output there is recommended
to use shielded twisted copper cable, maximal length 1200m. The cable must be located at indoor
rooms. Nominal cable impedance should be 100 Ω, loop resistance max. 240 Ω, cable capacity
max. 65 pF/m. The cable should be led in one line, i.e. NOT to „tree“ or „star“. Termination resistor
should be located at the end. For short distance other topology is allowed. Terminate the network by
a termination resistor. The value of the resistor is recommended about 120
. For short distance
termination resistor can be left out. Outside diameter of the cable for T3411 and T7410 connection
must be from 3 to 6.5 mm. Suitable cable is e.g. SYKFY 2x2x0.5 mm
2
, where one wire pair serves
for device powering and the other pair for communication link. For devices T3311L, T3313L,
T7310L, T3411L and T7410L use cable with respect to female connector parameters. Do NOT
connect shielding at connector side. The cable should not be led in parallel along power cabling.
Safety distance is up to 0.5 m, otherwise undesirable induction of interference signals can appear.
Electrical system (wiring) may do only worker with required qualification by rules in
operation.
Info mode
If in doubt of setting of installed device, verification of its address is enabled even without
using computer. Power should be connected. Devices with RS232 interface have address always set
to one.
Unscrew device cover and shortly press button next to connection terminals (jumper should
be opened). Actual adjusted address of the device is displayed on LCD display at decimal base, for
HWg-Poseidon’s communication protocol there is shown number corresponding with ASCII
address code. Next press of button exits info mode and actual measured values are displayed.
Note: No measurement and communication is possible during info mode. If device stays in info
mode for longer than 15 s, device automatically returns to measuring cycle.
