User Guide

If asking for last calibration data and the controller was never

calibrated, it answers with “0”; e.g. “01<STX>0<ETX>”.

If the controller was calibrated, it answers with “1” followed

by the calibration data. The Data field of the answer has the

following format:

pH 502:

1<Date><Time><Offset><Slope1><Slope2><Buf1><Buf2><Buf3>

• Date: DDMMYY (e.g. “170400” for April 17,2000)

• Time: HHMM (e.g. “1623” for 4:23 pm)

• Offset: ASCII string (e.g. “

0.2”)

• Slope 1: ASCII string (e.g. “62.5”)

• Slope 2: ASCII string (e.g. “60.4”)

• Buf 1: ASCII string (e.g. “7.01”)

• Buf 2: ASCII string (e.g. “4.01”)

• Buf 3: ASCII string (e.g. “10.01”)

mV 602: 1<Date><Time><Buf1><Buf2>

• Date: DDMMYY (e.g. “170400” for April 17,2000)

• Time: HHMM (e.g. “1623” for 4:23 pm)

• Buf 1: ASCII string (e.g. “7.01”)

• Buf 2: ASCII string (e.g. “4.01”)

The items in the Data field are separated by blanks.

If an item is not available (e.g. Buf 3 if only a two points

calibration was performed) it is replaced by the “N” charac-

ter.

Note The “r485” message can appear on the LCD while the con-

troller is receiving or answering commands.

SETTING THE BAUD RATE

The transmission speed (baud rate) of the meter and external

device must be th same.

The meter is factory set to 9600 bps. To change this value,

use setup item 71.