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Metrohm 743 Rancimat User Manual

Page 60

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4.4 Calibration functions

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743 Rancimat

Preparing Delta T determination

Figure 6 shows in detail how the accessories for determining Delta T are
mounted. Proceed as follows:

1 Prepare reaction vessel cover

Mount the air tube on the reaction vessel cover (see "Mount the
reaction vessel cover", page 15)
.

Clamp the first spacer at a distance of approx. 12 cm from the
lower end onto the air tube.

Clamp the second spacer at a distance of approx. 5 cm from the
lower end onto the air tube.

Insert the temperature sensor from above into the temperature
sensor opening of the reaction vessel cover and fasten it in the
corresponding openings of the spacers.

2 Prepare reaction vessel

Fill the reaction vessel with 5 g silicone oil (e.g. FLUKA 85409).

Place the reaction vessel cover with the temperature sensor on
the reaction vessel.

Push the temperature sensor fully downwards (the sensor must be
on the vessel base).

3 Insert and connect reaction vessel

Insert the reaction vessel with the mounted reaction vessel cover
in channel 2 or 3 of the required heating block.

Screw the one end of the FEP tubing 250 mm onto the thread
adapter M8 / M6 of the reaction vessel cover.

Screw the other end of the FEP tubing onto the corresponding
connector (3-3) of the Rancimat.

4 Set method parameters

Note

Create a unique method for both blocks, so that you can sepa-
rately enter the temperature correction for both blocks.

In the Control window, select the required method for the
heating block for which the temperature correction Delta T is to
be determined (see "Select method", page 81).