5.2 Starting Gelation.
Having prepared the sample in the manner described, gelation time measurement can be started in one of the
following ways :-
5.2.1
If you want to set up your sample under the paddle, start reaction and gelation timer
simultaneously:
Press the ‘start’ button once. This starts the timer incrementing, the LED will flash ‘Green’ and the paddle
will start to reciprocate (up and down).
When the sample has gelated to the extent that
paddle movement is halted
(circuit is closed), the timer
is stopped along with the paddle, the buzzer sounds and the display will alternate between the word
‘GEL’ and the indicated gelation time.
This is the normal gelation mode.
5.2.2
Alternatively, if you want to start the timer as soon as the sample reaction is started:
Press the ‘Hold’ button once as soon as the sample is mixed, the timer starts incrementing (as gelation
has started), the LED will illuminate ‘Red’, the paddle will reciprocate (up and down) and the display will
alternate between the word ‘HOLD’ and accumulated time.
If the paddle switch is closed in the ‘HOLD’ state the timer is not stopped and the paddle continues to
reciprocate. This allows you time to place the sample under the paddle and get ready for gelation
measurement.
To commence gelation measurement once everything is set up, just press ‘Start’ button once and then
follow instructions shown above in 5.2.1
5.3 Accidental tripping during gelation measurement.
If the paddle is accidentally tripped during gelation, the timer can be restarted by pressing ‘Restart’ button once.
Note:
that the timer is restarted from when it was stopped, therefore the elapsed time between stopping and
restarting the timer is not recorded.
5.4 Stopping during gelation measurement.
The instrument can be stopped during gelation by pressing the ‘Stop’ button once. The paddle stops
reciprocating, the LED is extinguished and the word ‘STOP’ is indicated on the display.
To restart the gelation process just press the ‘Restart’ button once.
Note:
While in stop mode, the timer will continue to run, and when restarted will indicate actual gelation time.
However, if the ‘Stop’ button is pressed a second time, having just stopped it, the timer will reset and the
instrument will enter the ‘Hold’ state, (see 5.2.2 above).
6. Maintenance, Servicing & Repair
WARNING: Ensure the unit is disconnected from the mains electricity supply before attempting
maintenance or servicing.
This range of equipment does not require routine servicing. The only maintenance required is to clean external
surfaces with a damp cloth and mild detergent. Spillages or splashes should be cleaned up straightaway after
isolating the unit from the mains electricity supply.
6.1 Repairs
Any repairs or replacement of parts MUST be undertaken by suitably qualified personnel.
Only spare parts supplied or specified by Barloworld Scientific Ltd. or its agent should be used. Fitting of
non-approved parts may affect the performance of the safety features designed into the instrument.
For a comprehensive list of parts required by service engineers conducting internal repairs, or to receive a service
manual, please contact the Sales Department of Barloworld Scientific Ltd quoting both the model and serial
number.
If in any doubt please contact the Service Department of Barloworld Scientific Ltd.
6.2 Calibration
Your Gelation Timer has been carefully factory calibrated and is provided with a calibration certificate. If you
require your unit to be re-calibrated at any time, please contact our Service Department of Barloworld Scientific
Ltd.
