Metrohm 767 Calibrated Reference - Manual (Page 15)

3 Procedure for checking instruments
767 Calibrated Reference Instructions for Use
11
3. note following parameters, then set
(example 679) :
temperature (see above)
50°C
cond. range 20 µS/cm
paper feed 20 cm/h
4. press start see G value for
Rancimat in certifi-
cate for 767.0010
(approx. 66 µS
1) )
allow all channels
to write out 2 - 3 x
(the zero line is
shown in all chan-
nels)
5. wait until the printer is print-
ing out a channel which has
not been checked.
Replug cable (see Fig. 8,
p. 11), so that 14.3 kΩ ≅
approx. 69 µS is obtained
(see G value (5))
G value (5)
(ca. 69 µS
1) )
allow all channels
to write out 2 - 3 x.
In the checked
channel the line will
be offset by the
amount of the al-
teration in conduc-
tance → check by
measuring with
ruler
6. if necessary repeat steps 1 - 5 for all
channels
1) Please consider the small number of decimal places in the display!
Fig. 7: Cable arrangement for 1st G value
(15.3 k S →approx. 66 : S)
Fig. 8: Cable arrangement for 2nd G value
(14.3 k S → approx. 69 : S)
1 2 3 4 5 6
Rancimat
cable 6.2150.020
cable 6.2150.010
767
1 2 3 4 5 6
Rancimat
cable 6.2150.020
cable 6.2150.010
767