Mode Setup Commands; Data Read Commands - Hach Anatel PAT700 User Manual

2.8.3 Mode setup commands

Command Mode
"MC" Self-clean mode
"MD" Automatic TOC mode
"MO" Manual TOC mode
"MP" Conductivity mode
"MY" Standby mode
"MZ" Offline mode
"MR" Master reset

2.8.4 Data read commands

"RD" Read data
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:
TOC mode response:
"Date Time
Resistance Temperature
"07/25/2007 20:05:46
0.832 25.21
Conductivity mode response:
"Date Time
"07/25/2007 20:07:36
Analyzer activity
Water flows through cell with UV lamp on.
Continuous TOC analyses.
Performs one TOC analysis, then goes to idle mode.
Water flows through cell with continuous conductivity measurement.
Offline, water flows through cell.
Offline, all valves are shut.
Hardware reset, equivalent to cycling power.
Read-only command produces last data. The format depends on
the current mode.
"RD"
Mode State TOC alarm
Curve type Elapsed time"
1 2 301
P1 310"
Mode State Resistance
7 1 18
Installation
Percentage Trend
0% -5.0
Temperature"
24.28"
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