Metrohm 767 Calibrated Reference - Manual (Page 5)

1 Overview
767 Calibrated Reference Instructions for Use
1
1 Overview
1.1 Introduction
The measuring source 767.0010 Calibrated Reference for mV, pH,
Ω, µS, °C is a calibrated instrument for the quantities mentioned above.
It is connected instead of the electrodes and can be used for rapidly
and easily checking of the functioning and the basic accuracy of most
Metrohm instruments.
In addition the input resistance of high-impedance measuring amplifiers
(pH Meters, Titrators) and, for separate amplifiers, the insulation of the
reference point from the earth can be checked.
Fig. 1: 767 Calibrated Reference
solar cell
S1a
S1b
100 Ohm
1000 Ohm
Pt 100
Pt 1000
+U/1G
1G
+U/direct
-U+/direct (6)
(5)
(4)
(3)
(2)
(1)
Fig. 2 Functional scheme: Position "Voltage
source ON"
Fig. 3: Label on cover
(exact values are given on the cover)
cover open ¦ cover closed
U R G T U R G T
mV pH S :S °C mV pH S :S °C
100 10'000 0 100 10'000 0
1000 1000 0 1000 1000 0
(1200) 0 7 1G
1200 0 7 14'300 70
-341 12.7 0 7 460'000 2