Metrohm 845 Eluent Synthesizer - Manual (Page 21)

2.6 pH Controller
845 Eluent Synthesizer / Instructions for Use 8.845. 8001EN
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2 Install tubing connection to pH Controller
6.1838.010 FEP tubing connection should be used to make
the tubing connection to the pH Controller.
• Insert the black O-ring belonging to the 6.1838.010 FEP
tubing connection into an M6 thread of 6.1602.190 Eluent
bottle head.
• Then push the tip of the 6.1838.010 FEP tubing connection
through the O-Ring and M6 thread.
• Attach the 6.2726.090 Antidiffusion micro-valve to the tip of
the 6.1838.010 FEP tubing connection.
• Connect the other end of the 6.1838.010 FEP tubing con-
nection to the pH Controller (see Instructions for Use – 806
Exchange Unit).
3 Screw on bottle adapter
• Now screw 6.1602.190 Eluent bottle head onto eluent bottle
22.
4 Insert the Aquatrode in the Eluent bottle head
• Insert 6.0257.020 Aquatrode into the large opening of the
6.1602.190 Eluent bottle head. Watch out, that the Aquatro-
de looms deep enough into the mixture when the pH is
measured.
2.6.2 pH Controller cable connection
The methods at the pH Controller are started via a remote signal from
the 845 Eluent Synthesizer (see Section 3.3.3). Connect the pH Control-
ler to the 845 Eluent Synthesizer as follows:
1 Connect Remote Box
• Connect the 6.2148.010 Remote Box to connection "Re-
mote Box / MSB4" 15.
2 Connect pH Controller
• Connect 6.2141.210 Cable to the remote output of
6.2148.010 Remote Box.
• Connect the end of the 6.2141.210 Cable marked A to the
remote input of the pH Controller.
• Connect the end of the 6.2141.210 Cable marked B to the
remote input of the second pH Controller.
The Metrohm 702 Titrino can be used with the SET method to set the
pH to a defined value (see the Instructions for Use of the correspon-
ding Titrino).
The method for the pH-adjustment and the corresponding parameters
have to be defined on the pH-Controller. The pH-adjustment is started
by a remote signal sent from the 845 Eluent Synthesizer to the pH-
Controller. For the installation and operation of the pH Controllers
please refer to the corresponding Instructions for Use.