BTG Mutek PCD-05 Smart, Руководство по эксплуатации

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© BTG Operation Manual Mütek
TM
PCD-05, September 2017 39
V. Measuring
Fig. 5-6 Insert pH electrode
• To start the potential measurement in mV, press the
button "START".
- This will cause the displacement piston to oscil-
late and the streaming potential to be displayed
in mV
• Wait for approximately 30 seconds until the signal
has stabilized.
- For later data storage note down the streaming
potential start value mV (here: -935 mV)
5.9.1.2 Start titration
• Use a pipette to dose oppositely charged titrant until
point of zero charge 0 mV is reached (see 5.9.1
"Manual Titration", page 38).
• Note down dosage amount ml and pH value
(option) at point of zero charge as your measuring
result.
Information
Since the displacement piston continues its oscilla-
ting movement, the streaming potential and pH sig-
nal (optional) may change. This is a normal effect
without any influence on measurement results.
• Press "Off" (to the left of the "Potential" field) to stop
the displacement piston from oscillating.
5.9.2 Automatic titration with external titrator
Optionally the Mütek
TM
PCD-05 can be combined with
an automatic titrator. Therefore order the titrator adapter
module for the connection (see 4.6.2 "Connect with an
external titrator", page 27).
Information
Streaming potential and pH signal (optional) will be
send to the titrator.
Information
For more detailed information about the titration setting
parameters and data storage, please refer to the
manual of your external titration system.
5.9.2.1 Start measurement
• Start the potential measurement according to (see
5.9.1.1 "Start measurement", page 38).
5.9.2.2 Start titration
• Select oppositely charged titrant on your titrator
- sample charge: anionic = - mV signal, select
Poly-Dadmac
- sample charge: cationic = + mV signal, select
Pes-Na
• Select endpoint titration 0 mV on your external titra-
tion system.
• Insert the dosing tube into the measuring cell.
• Press START on your external titrator.
- The titrator stops automatically at the endpoint 0
mV streaming potential
• Note down the indicated ml result shown on your
external titrator system.
• Based on consumption, the charge level can be
quantitatively calculated especially in the case of a
polyelectrolyte titration. See chapter 2.1.2 "Calcula-
tion of charges", page 13.
Information
Since the displacement piston continues its oscillating
movement, the streaming potential and pH signal (optio-
nal) may change. This is a normal effect without any
influence on measurement results.
• Press "Off" ("Potential" field) to stop the displace-
ment piston from oscillating.
• Press "Off" ("pH" field) to stop the pH measurement
(optional).
PCD-05 Smart 0.22
SN 90300259 V2.5 Cell 1 Method 1
Home
START
START
Titrant
7.00
- 935
- 0 ml
mV
pH
Sample