9 appendix, 1 technical data, 1 measuring modes – Metrohm 827 pH lab User Manual
Page 59: 2 measuring inputs, Appendix, Technical data, Measuring modes, Measuring inputs, 9appendix
9 Appendix
826/827 pH meter, Instructions for Use
51
9
Appendix
In this section you will find the most important technical data of the pH
meter, dialog structures, a list of standard accessories and optional ac-
cessories as well as warranty and declarations of conformity.
9.1
Technical data
Provided that nothing to the contrary is mentioned, the published val-
ues represent the typical data of the 826 pH mobile and the 827 pH
lab.
9.1.1
Measuring modes
Measuring mode
Prim. measured
quantity
Sec. measured
quantity
pH
pH
T
Temperature
T
Potential
U
9.1.2
Measuring inputs
Potentiometric
for pH value, potential
- 1 high-impedance measuring input for pH, redox and ISE electrodes
- 1 reference input for separate reference electrode
Input resistance
> 1 * 10
12
Ohm (under reference conditions)
Temperature
Also for automatic temperature compensation
- 1 measuring input for temperature sensors (Pt1000 or NTC)
NTC characteristics configurable
Default values
R (25°C) = 30'000 Ohm / B
25/50
= 4100
Measuring interval
Measuring cycle
1 s for all measuring modes