2.1 Instrument description
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899 Coulometer
2 Introduction
2.1 Instrument description
The 899 Coulometer is a titrator used for coulometric water content
determination according to Karl Fischer. There are method templates
available which are already configured except for a few parameters. The
methods can be modified and stored under a new name. The methods
can be exported to a connected USB flash drive. This function makes it
possible for you to copy methods quickly and easily from one instrument
to another.
The 899 Coulometer has an integrated magnetic stirrer that is visible on
the top side of the housing. The titration cell (coulometry) can easily be
attached to the magnetic stirrer. Thanks to its compact construction, you
can use the instrument in a small space as a stand-alone titrator. Further-
more, the remote interface permits you to connect a sample changer with
oven module and to perform automated determinations.
As an alternative to the power supply with the power supply unit provi-
ded, the 899 Coulometer can also be operated by means of an accumula-
tor (a so-called Power Box). The Power Box is available as optional equip-
ment. It is particularly appropriate for use in environments where the
power supply is either unstable or absent.
2.1.1 Connectors
The instrument is equipped with the following connectors:
￭ Electrical connection
For connecting to the power supply with the aid of the power supply
unit provided or for connecting to the 6.2164.500 Power Box.
￭ MSB connector (Metrohm Serial Bus)
For connecting an additional stirrer.
￭ USB (OTG) connector
The 6.2151.100 adapter can be used to connect, for example, a
printer, a USB flash drive or a USB keyboard.
￭ Sensor connectors
Three connectors for the following sensor types:
– Double Pt electrode
– Generator electrode
– Temperature sensor (Pt1000)
￭ Grounding socket
For grounding the coulometer.
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