ENGLISH
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GENERAL INFORMATION
The HD 9213-R1 is normally supplied with the combined 4-electrode and
temperature probe SPT13.
The cell measurement area is bounded by a Pocan tube. A positioning
key, directs correctly the insertion of the tube into the probe. To clean the
probe, pull the tube along the probe axle. It is not possible to take mea-
surements without this tube.
The instrument may be fitted with 2-electrode conductivity probes with cell
constant 0.1 - 1 - 10; they may also be fitted with temperature measuring
probes of the series TP 9.. in various configurations and degrees of preci-
sion.
FUNCTIONS
1 - AUTO POWER OFF DISABLE
To disable the automatic cut-out function, proceed as follows: switch on
the instrument with the ON/OFF key, holding down the °C/°F key until
all the symbols disappear, then release the °C/°F key. The
K
symbol
flashes.
2 - REFERENCE TEMPERATURE 20°C or 25°C
To set the reference temperature, proceed as follows: switch on the
instrument with the ON/OFF key, holding down the CAL key until all the
symbols disappear, then release the CAL key. Using the
1
or
2
key,
set the desired value r20 or r25, which stand for 20°C or 25°C. To quit
this routine, press the
key.
3 - SELECTING THE CELL CONSTANT
To select the cell constant for probes with 2 electrodes, proceed as fol-
lows: switch on the instrument with the ON/OFF key, holding down the
key until all the symbols disappear, then release the
key. One of
the messages c 0.1, c 1.0 or c 10 appears on the display. Using the
1
and
2
keys, set the desired cell constant c 0.1, c 1.0 or c 10 which
