De-chloridization of the cathode
1.
Remove the membrane and electrolyte from the sensor. Refer to the operator manual delivered
with the sensor for details on how to do this.
2.
Fix the sensor vertically onto a clamp or stand so that its head is facing upwards. If the sensor
has a permanently attached cable, introduce the LEMO plug into the sensor receptacle (
No. 6
in
Figure 1
on page 5). Sensors with detachable cables may connect directly to the sensor cable
(
No. 3
).
3.
For the supplied regeneration cell, push the tube of the regeneration cell over the sensor head
until it reaches a stop. Connect the red banana plug into the counter electrode socket (
No. 7
).
4.
For the DG33619 regeneration cell , screw the regeneration cell in the sensor head. Connect the
blue banana plug into the counter electrode socket (
No. 7
).
5.
Pour standard ORBISPHERE model 29011 chloridizing solution into the regeneration cell so that
it covers the electrode .
6.
Turn the selector knob (
No. 4
) to the
dechloridize
position and press the TIMER switch (
No. 5
).
The warning light will come on and remain on for 60 seconds while de-chloridization takes place
7.
Observe the solution in the regeneration cell. From being a clear liquid it should fill with small
hydrogen bubbles given off at the cathode. This has the effect of darkening the solution. If at the
end of the 60 seconds de-chloridizing period an abundant development of bubbles from the
cathode is not obvious then press the TIMER switch once more and continue to do so until
bubbles appear. An abundant evolution of bubbles is a sign that de-chloridization is probably
complete.
8.
Look closely at the cathode. It should now be silver-white with no darker patches. If this is not the
case discard the solution and replace with new solution then continue to activate the de-
chloridizing process. Any darker patches will disappear with time.
9.
With de-chloridization of the cathode complete, disconnect the counter electrode and sensor, and
empty the solution from the regeneration cell.
10.
Rinse the interior of the regeneration cell and sensor with water.
11.
Remove the regeneration cell from the sensor and rinse the sensor head again with water.
De-greasing the sensor (optional procedure)
Under most operating conditions the sensor is not exposed to greasy samples and with careful
handling no problems should be experienced with grease. In such circumstances no sensor de-
greasing is necessary and you should proceed to the next section.
If, however, the sensor has been used with dirty samples or exposed in some way to grease then the
de-greasing procedure described in this section should be followed. You will learn from experience
whether in your particular case de-greasing is necessary on a regular or occasional basis or not at
all.
The procedure is as follows:
1.
Fill the sensor with standard ORBISPHERE model 2959 electrolyte, then mount any membrane
and stand the sensor face down in boiling water for about ten minutes shifting its position from
time to time.
2.
After boiling, allow the sensor to cool and then remove the membrane and rinse the sensor head
with water. The sensor head should now be free of grease.
Re-chloridization of the cathode
In this process a fresh layer of silver chloride is grown on the cathode surface.
1.
Fix the sensor vertically onto a clamp or stand so that its head is facing upwards. If the sensor
has a permanently attached cable, introduce the LEMO plug into the sensor receptacle (
No. 6
in
8
English
Содержание ORBISPHERE 32301
Страница 2: ...English 3 Deutsch 12 Fran ais 22 Espa ol 32 Italiano 42 Nederlands 52 Svenska 62 Suomi 71 80 2...
Страница 81: ...ORBISPHERE 1 2 DG33619 A1100 C1100 3 81...
Страница 82: ...1 1 120 230 10 LEMO 3 10 LEMO 6 1 32301 1 120 230 5 2 6 3 7 4 5 60 4 7 2 LEMO 82...
Страница 83: ...2 31xxx 31xxx 2 3 A1100 C1100 DG33619 A1100 C1100 3 DG33619 EC Orbisphere DG33620 EC EC 4 1 2 LEMO 6 1 82 3 83...
Страница 86: ...1 ORBISPHERE 2959 2 1 LEMO 6 1 82 3 2 7 3 DG33619 7 4 10 ORBISPHERE 29011 1 5 4 chloridize TIMER 5 6 7 8 86...
Страница 87: ...1 2 3 4 70 30 5 6 1 2 3 Hach Lange TEST 87...
Страница 88: ...5 LEMO 10 LEMO 10 5 LEMO 6 1 82 89 3 6 10 31331 89 31331 7 8 2 5 10 3 4 3 9 3 1 1 4 1 9 LEMO 4 9 88...
Страница 90: ......
Страница 91: ......