Techne RS232 - Manual (Page 17)

D B - 2 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 15
OPERATION
Preparation
1. Select the insert block(s) appropriate to the application. A list of
available blocks is given on page 20 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 two 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 fill 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).