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5–11 RS-232
Suppose a chemical experiment is performed in a laboratory
and an engineer wants to find the relationship between the chem-
ical reaction and temperature. He uses a TEC-9300 to control the
temperature of the solution being tested. He is particularly inter-
ested in generating a test report containing the relationship
between the concentration and temperature.
For a single unit application, it is adequate to order a TEC-
9300 with RS-232 communication and DAQ (Part Number
TEC99923) software. Using the DAQ software, the temperature
data can be viewed and stored in a file. The user can program the
temperature as well as other control parameters such as PID val-
ues. He can set up the controller, download a ramp and soak pro-
file, execute manual control or auto-tuning procedure, etc. The
results can be printed out or stored in a file for future reference.
Refer to section 2-16 for installation and section 4-8 for setup
procedure.
5–12 Retransmit
An air-conditioned room uses two TEC-9300 units to control
the temperature and humidity. The temperature and humidity
must be recorded on a chart recorder. The preferred ranges for
these two parameters are: 20°C to 30°C and 40% RH to 60% RH.
The recorder inputs accept a 0–5V signal.
To achieve this, set the following parameters in the setup menu.
UNIT 1: UNIT 2:
FUNC=FULL FUNC=FULL
COM=0–5V COMM=0–5V
AOFN=PV1 AOFN=PV1
AOLO=20.0 (°C) AOLO=40.0 (%)
AOHI=30.0 (°C) AOHI=60.0 (%)
IN1=PTDN IN1=0–1V (according to humidity sensor)
IN1U=°C IN1U=PU
DP1=1-DP DP1=1-DP
SP1L and SP1H are used to limit the
adjustment range of the set point.
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