Metrohm 794 Basic Titrino - Manual (Page 49)

2.7 Parameters, key
794 Basic Titrino
45
2.7.3 Parameters for MEAS
measuring parameters
determine the measurement.
statistics :
Calculation of mean values and standard deviation,
see also page 55.
preselections :
ON/OFF of various auxiliary functions such as auto-
matic requests after the start and activate pulse.
>measuring parameters
signal drift OFF mV/min
equilibr.time OFF s
meas.input: 1
I(pol) 1 µA
U(pol) 400 mV
electrode test: OFF
Measuring parameters
Drift criterion for measured value acquisition (input
range depends on the measured quantity:
pH, U, Ipol: 0.5...999 mV/min, OFF
Upol: 0.05...99.9 µA/min, OFF
T: 0.5...999 °C/min, OFF)
sets "OFF".
"OFF" means that the measured value is acquired after
a fixed equilibration time.
Waiting time for measured value acquisition (0...9999 s,
OFF)
sets "OFF".
If no new equilibration time has been entered, the
Titrino calculates an equilibration time appropriate to
the drift with the formula
equilibr.time (in s) 5
0.01 Drift
150
+
+
=
The measured value is acquired when the first criterion
(drift or time) is met. With drift and time "OFF", you will
have an "infinite" measurement.
Measuring input for pH and U. (1, 2, diff.)
Inquiry only with measured quantities pH and U.
Measuring input 1 or 2 or differential amplifier;
connection of electrodes, see page 155.
With polarized electrodes, instead of the measuring
input the
polarization current (-127...127 µA)
or the
polarization potential (-1270...1270 mV, in steps of 10
mV)
is inquired.
Electrode test (OFF, ON)
Test for polarized electrodes. Performed on
changeover from the inactive standby mode to a
measurement. "OFF" means that the test is not
parameters
>measuring parameters