Grant Instruments Labwise - Manual (Page 11)

30853(1) Page 11 May 2012
There are four checkbox indicator/controls:
 Relay 1
 Relay 2 (only enabled for the GP200)
 Logging
 External probe
The relay checkboxes are for indication only and show the state of the relays. The logging
and external probe checkboxes are controls and can be used to switch the associate feature
on or off. The indicators are red if the feature is switched off and green when switched on.
When the logging checkbox is clicked the indicator changes to green. The default settings
open a dialog box and prompt for a log filename. Other log filenames and the default
directory can be configured – see section 3.6. After confirming the log filename, a prompt
will appear to allow comments to be added to the log file. Logging only starts when both of
the log filename and comments have been confirmed. Data is recorded as a tab separated
values (.tsv) in the defined log directory. Logging can be stopped at any time by toggling the
logging checkbox back to red.
The Optima can allow control via an external temperature probe. These are available from
Grant Instruments or your local distributor. The external probe can be activated using the
“External Probe” checkbox. If a probe is not present or faulty then an appropriate error
message will be displayed. The default operation uses the internal temperature probe.
The temperature alarms box indicates when any high or low temperature alarm limit is
exceeded. The box should be green in normal operation. If an alarm is detected then the
box will turn red and a short alarm message will be shown. See section 3.5.3 for configuring
alarms.
3.4. Running presets or programs
Presets and programs can be run using the drop down option boxes on the main control
window.
Note that both presets and programs will start as soon as they are selected from the
drop down menu.
A preset consists of a set temperature and pump speed (TXF200 only) that can be
configured for convenience. Selecting a preset from the drop down menu will cause the set
temperature and pump speed to be updated immediately to the preset values.
To move away from a preset temperature and pump speed, select “User defined” from the
drop down menu or manually change the set temperature or pump speed.
A list of the programs stored in the connected Optima is shown on the programs drop down
menu. Selecting a program from the drop down menu will cause it to start immediately.
When a program starts the timer changes to show information about the segment. On the
completion of a program, the Optima will either return to the original temperature, hold at the
final temperature or repeat depending on the program definition.
To stop a program and return to the normal operating mode, select “Isothermal” from the
drop down menu.