Waters Alliance 2790/2795: HPLC SystemCommands and Tips for Third-Party Devices
Waters Alliance 2790/2795: HPLC System
In addition to the standard commands (refer to Practical Tips for Device Control 
General Device Commands), the Waters 2790/2795 Separation Module device driver supports the following commands and properties for the HPLC System (please note that the display Filter level determines which commands and properties are displayed):
|
Property |
Values |
Description |
|
|
ChartOut² |
³ GradA, GradB, GradC, GradD, FlowRate, SampleLoopPressure, SystemPressure, PrimaryHeadPressure, VacuumLevel, SampleTemperature, ColumnTemperature |
Sets the type of the analog signal that is transmitted from the Chart Out output. The available options depend on the system configuration. The following options are available only if the corresponding module is installed: |
|
|
Option |
Module |
||
|
VacuumLevel |
Degasser |
||
|
SampleTemperature |
Sample Heater |
||
|
ColumnTemperature |
Column Heater |
||
|
LogStatus² |
On, Off |
If the property is set to On, each change of the instrument's status is logged in the Audit Trail. (The default setting is Off. The property is visible only on the Advanced level.) |
|
|
PrecolumnVolume² |
0.0 to 10,000.0 |
Specifies the solvent volume in [µl] that is pumped through the column before injection is started. (The default setting is 0.0 µl. The property is visible only on the Advanced level.) |
|
|
Status |
(80 characters) |
Indicates the status of the HPLC system. |
|
|
Vendor |
|
Indicates the manufacturer (here: Waters). |
|
Tips:
² It is not possible to change the property during injection or during a gradient run.
³ The signal condition depends on the selected ChartOut option:
|
Signal |
Parameter at 0 mV (min) |
Parameter at 2000 mV (max) |
|
ColumnTemperature |
20°C |
60°C |
|
FlowRate |
0.000 ml/min |
10.000 ml/min |
|
GradA - GradD |
0.0% |
100.0% |
|
PrimaryHeadPressure |
-3.45 bar (-50 psi) |
380 bar (5500 psi) |
|
SampleLoopPressure |
-3.45 bar (-50 psi) |
380 bar (5500 psi) |
|
SampleTemperature |
4°C |
40°C |
|
SystemPressure |
-3.45 bar (-50 psi) |
380 bar (5500 psi) |
|
VacuumLevel |
-0.0 bar |
0.34 bar (4.91 psi) |
Commands
|
Command |
Description |
|
StopOperation |
Stops a previously started operation (e.g., by the SysPrep or WetPrime commands (see below) or by the PrimeSyringe command, see |
|
SysPrep |
Performs system preparation including priming the fluid components of the systems, rinsing the syringe, and washing the needle. (The command is visible only on the Advanced level.) |
|
WetPrime |
Primes the fluid components of the system with the currently selected flow rate and for 100.0 minutes. Use the StopOperation command to stop priming. (The command is visible only on the Advanced level.) |
For information about how to install the Waters Alliance 2790 and 2795 HPLC modules, refer to Hardware Installation 
Waters Alliance 2790/2795 HPLC Modules: Installation in the Administrator Help section.