Setting The Limiting Value For Temperature; Communication; Potential-Free Contact - Thermo Scientific Barnstead Smart2Pure Operating Instructions Manual

13.3 Setting the limiting value for temperature

Setting range: 10 - 40°C
Basic setting: 35°C
Three presses on the menu-key (the red "Temp" LED lights up) enables the limiting value for
the temperature to be set. Use the up- and down-keys to make the setting. The particular posi-
tion that is to be changed can be selected with the Enter-key and is shown flashing in the dis-
play.
When the wanted value has been reached, this must be confirmed with Enter.
Should a value of 41°C be set, then the word OFF appears in the display and limiting value
evaluation is switched off.
When the limiting value of the temperature is exceeded (Limit value Temperature), then the red
"Temp" LED lights up and the buzzer additionally signals it. The fault message can be given out
via the optional printer.

13.4 Communication

A printer can be connected to the RS 232 interface for the print out of measured values. The in-
terface works at a transmission rate of 9600 bits/sec., 8 data bits, 1 stop bit and no parity.
The resistance in MΩxcm and the temperature in °C are given out at the serial interface sepa-
rated by a comma. The conductivity is automatically scaled to three significant places. Output is
made 1x per hour.
When the system is in operation, a press on the down-key triggers a measured value output at
the serial interface.
Print out:
e.g.: 18.2 MΩxcm, 23.4 °C
The SUB-D socket has the following pin assignment: PIN 2: RXD

13.5 Potential-free contact

The system is equipped with a potential-free contact for the control of external equipment.
Max. connected load: 30V, 2A.
The PIN assignment of the 5-pin socket is as follows:
Thermo Scientific Barnstead Smart2Pure
Ultrapure water system
PIN 3: TXD
PIN 5: GND
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