1 overview, 1 introduction, Introduction – Metrohm 767 Calibrated Reference User Manual

Page 5: Fig. 1: 767 calibrated reference, Fig. 3: label on cover, 1overview

Overview

767 Calibrated Reference Instructions for Use

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

+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

mV pH S

°C

mV pH S

°C

100 10'000

100

10'000

1000

(1200)

0 7 1G

1200

0 7 14'300

-341 12.7

0 7 460'000