Teledyne 450H 1.6.5 RS232 Output, Control Inputs, Zero Calibrate, Description

	Input		Description
1			Zero Calibrate
2			Undefined (Spare)
3			Undefined (Spare)
4			Undefined (Spare)
5			Undefined (Spare)
6			Undefined (Spare)
		TABLE 1.2	CONTROL INPUTS

Zero Calibrate:

The zero calibration input is used to initiate zero calibration from an external device. This control input only functions when the instrument has been configured with the Auto-Zero option. To perform the Auto-Zero calibration using the control input, this input should be closed for at least 2 seconds and released. The instrument will then automaticall perform the zero calibration and return to normal monitoring afterwards.

See Section 3.5 for details on configuring the Auto-Zero feature.

1.6.5 RS232 Output

The RS232 output is provided on the 9-pin D-Sub connector shown in Figure 1.4. The RS232 output can be connected to a computer or serial printer. The RS232 output can be used to record alarm events with a time and date stamp or can be used to control the instrument’s operation remotely using a computer. Almost any function that can be done through the front panel interface can also be done remotely through the RS232 interface.

To use the RS232 for instrument control, all that is needed is a PC(personal computer) with an available serial communications port(COM port), a serial cable, and terminal emulation software. The serial cable must have a female DB-9 connector on one end and an appropriate connector on the other end to interface with the COM port on a PC.

For more details on the use of the RS232 interface, please contact Teledyne API and request document number 01350.

P/N 02826B1 Teledyne API Model 450H O3 Monitor Instruction Manual - Page 21