Sartorius Docu-pH - Operating the Meter: Measurement; Preparation for Operation; ATC Probe Functionality; Lock Function Operation

21
Operating the Meter: Measurement
Preparation
§ To select measuring mode: Press softkey
pH or mV.
!Improperly standardized electrodes
yield inaccurate measurements.
Perform calibration regularly prior to
measurement.
$ Temper buffer or buffer solutions or
measure current temperature, if the
measurement is performed without an
ATC probe.
ATC Probe
– Measurements can be performed with
and without an ATC probe.
– The Docu-pH
Meter
detects the following
type of ATC probes automatically:
– NCT10 kohm: +14°C to 76°C
– NCT30 kohm: –5°C to 40°C
– PT1000: 4°C to 105°C
!It is imperative that you measure the
temperature to achieve accurate pH
measurements. When measuring with-
out an ATC probe, enter the current
temperature manually:
1) Determine the current temperature
using a thermometer.
2) Start temperature entry:
Softkey
Temp
3) Set temperature value:
Softkey
q, softkey Q
3) Save temperature value:
Softkey
OK
Lock Function
– The lock function freezes the value
in the display. Once the stability
conditions have been met, the value
is displayed statically (Symbol: “ “)
Deactivate lock function:
Press Softkey
Unlock
Activate function: see chapter entitled
“Default Settings.”
Fast Mode (Shorter Measurement
Time)
– The fast mode reduces the measuring
time by using a lower stability criterion.
Activate function: see chapter entitled
“Default Settings.”