Hach ANATEL PAT700 User Manual - page 37
Page 35
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.