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Instruction manual for use of TEA-101D transmitter
Transmitter is designed for measurement of ambient air temperature at °C or °F. Measuring
temperature sensor is non-removable instrument part. Measured temperature is displayed on LCD
display. It is possible to switch OFF the LCD display. Transmitter is connected to circuitry by
current loop. Please read instruction manual before the first device connection.
All transmitter setting is performed by means of the PC connected via the optional
communication cable (not included in delivery). Program
Tsensor
for transmitter setting is
available at ATAL B.V.. Program enables to set measured range and on/off the LCD display. It
supports make the adjustment of the device too. This procedure is described at file „
Calibration
manual.pdf
“ which is installed commonly with the software.
Device setting from the manufacturer
Transmitter is set from the manufacturer to the following parameters:
value at output I1:
temperature, range 4 – 20 mA corresponds to -30 to +80 °C
display:
switched ON
Modification of the setting is possible to do by means of the PC using procedure described
at the end of this document.
Installation of the transmitter
Transmitter is designed for wall mounting. There are two mounting holes at the sides of the
case. Don’t connect transmitter while power supply voltage is on. Interconnection terminals 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 upper terminal hole and lever by him. Do not remember to tighten glands and case
lid with inserted packing after cables connecting. It is necessary for warranting of protection IP65.
It is recommended to use shielded copper cable (e.g. SYKFY) with outside diameter of the
cable must be from 3.5 to 8 mm, maximal length 1200m. The cable must be located at indoor rooms
(probe is not protected for outdoor use). 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.
In the application where air flow is too low it is possible that measurement accuracy may be a
bit lower (in decimals of °C) due to undesirable warm influence which develops in transmitter
electronics because of its own power dissipation. Mechanical construction of the transmitter and
working position is minimizing this effect, but in critical applications we recommend to use optimal
value of load resistor Rz (see graph no.2 below). It minimizes power dissipation to minimal value.
If Uss and Rz are set, it is possible to do it by inserting of suitable serial resistor into current loop at
estimation device side.
Electrical system (wiring) may do only worker with required qualification by rules in
operation.
