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3. Force Rec. out
The FORCE RECORDING OUTPUT, or FORCE REC. OUT, sub-menu
determines the upper limit for force sent from the BNC analogue
output connectors. This will only affect the data collected from
the interface to a data acquisition system such as AD Instruments
PowerLab and LabChart software. The factory default setting for
FORCE REC. OUT is 20 mN, meaning that if the force of the mounted
vessel exceeds 20 mN, the force recorded in the data acquisition
software will not record more than 20 mN and will appear as a flat-line
trace at 20 mN, even though the force readings on the interface may
exceed 20 mN. Therefore, change the FORCE REC. OUT settings to an
appropriate setting so as to capture any maximal response from the
vessel of interest. This value should not exceed the settings for the
transducer range, which is defined by the sub-menu, MEASUREMENT
RANGE and is explained in the next section.
The “SELECT” and “ALL” functions are the same in this menu as
previously described for the “VALVE DELAY” menu. Pressing “ENTER”
will store the numbers in memory for future experiments.
Step 4 - The calibration is now finished. The values in the two bottom
lines are the actual pH and temperature reading.
Step no.:
The pH electrode is now calibrated
if OK, go to next step, else
NEXT STEP
BACK
1
2
3
4
repeat the calibration.
pH value: 4.00
pH CALIBRATION
Probe Temp.: 25.0
NOTE: Anytime FORCE REC. OUT is changed, a new weight calibration of the transducers should be
performed, entering the new voltage values into the data acquisition system being used.
