Techne RS232 - Manual (Page 19)

D B - 3 D w i t h R S 2 3 2 O P E R A T O R ’ S M A N U A L
P A G E 17
OPERATION
Preparation
1. Select the insert block(s) appropriate to the application. A list of available
blocks is given on page 22 of this manual. Ensure that both the underside of
the block(s) and the top of the hotplate are clean; efficient heat conduction
between these two surfaces is essential.
Top view showing three insert blocks in place
2. Place the aluminium alloy insert blocks into the well of the unit and place
the tubes containing the sample liquid in the blocks.
3. The heater design, temperature sensor and control circuit give good
temperature control and uniformity, but make sure that there is a close fit of
the tubes in the block to allow efficient heat transfer.
4. If less than the maximum number of insert blocks are fitted it is recommended
that you fit plastic half blocks to the space either side of the aluminium block.
The dummy blocks have the effect of reducing heat losses, thus improving
temperature stability.
5. Plug the mains cable into the socket in the rear of the unit. Connect to the
mains electricity supply with the plug provided or one wired correctly for
your supply. Switch the power ON from the switch located next to the mains
input lead. The mains indicator on the front panel will light (as well as the
fuse neon on the mains input unit).