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Installation
2.8.3 Mode setup commands
2.8.4 Data read commands
The data normally are displayed only in response to the “RD” command. If the “SA”
command is sent, data will be displayed at the end of each measurement. After the
analyzer powers up, it initially responds with zeros in all data fields until the first valid
reading is taken. For TOC data, the timestamp represents the time at which the unit
finished sampling and began oxidation.
The data format can take either of two forms, depending on whether the sensor is in TOC
mode or conductivity mode.
The analyzer produces new data every 15 seconds in conductivity mode or from 1 to 35
minutes in TOC mode. If the “RD command is used for polling, you can distinguish a new
reading by comparing the current timestamp with the previous timestamp.
Example:
Read command: “RD”
TOC mode response:
“Date Time Mode State TOC alarm Percentage Trend
Resistance Temperature Curve type Elapsed time”
“07/25/2007 20:05:46 1 2 301 0% -5.0
0.832 25.21 P1 310”
Conductivity mode response:
“Date Time Mode State Resistance Temperature”
“07/25/2007 20:07:36 7 1 18 24.28”
Command Mode Analyzer activity
“MC” Self-clean mode Water flows through cell with UV lamp on.
“MD” Automatic TOC mode Continuous TOC analyses.
“MO” Manual TOC mode Performs one TOC analysis, then goes to idle mode.
“MP” Conductivity mode Water flows through cell with continuous conductivity measurement.
“MY” Standby mode Offline, water flows through cell.
“MZ” Offline mode Offline, all valves are shut.
“MR” Master reset Hardware reset, equivalent to cycling power.
“RD” Read data
Read-only command produces last data. The format depends on
the current mode.
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