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OPERATION
1. Mount the instrument clamping post onto a suitable retort stand or fixture at the desired height for
operation. Ensure that the instrument is clamped firmly.
2. Screw the appropriate paddle to the end of the paddle connector on the sliding contact.
3. Connect the instrument to the electricity supply and switch on.
4. The instrument will perform an automatic self test at switch on. All segments will illuminate
momentarily before displaying a single ‘zero’ on the right hand side., a buzzer will sound and the LED
should illuminate green. The gelation timer is now ready to use.
SAMPLE PREPARATION
The test requires about 100ml of sample in a container which has an internal diameter of at least 38mm.
The top of the paddle stroke should be at least 32mm below the sample surface and the bottom of stroke
not closer than 13mm to the bottom of the container. Standard sample cups for use with the instrument
are available (catalogue number F7846).
STARTING GELATION
Having prepared the sample in the manner described, gelation time measurement can be started in one
of the following ways:
If you want to set up your sample under the paddle, start reaction and gelation timer
simultaneously:
1. 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.
Alternatively, if you want to start the timer as soon as the sample reaction is started:
2. 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.
Display
‘Start’ & ‘Restart’
button
‘Hold’ & ‘Stop’
button
LED
