Metex 2200P pH Analyzer/Controller - Manual (Page 10)

Model 2200P Page 8
3.7 Combination Probe with Preamplifier
3.7.1 If the analyzer is mounted in such a position that the 10 ft. cable on the
combinational probe cannot be directly connected to the 2200P. An AquaMetrix 101
Series preamplifier is required. The pre-amplifier converts the signal so that it can
be transmitted up to 3000 feet, the same as the differential (P60) probe. When the
pre-amplifier is used the controller must be configured, as if you were using a
differential (P60) probe. (Refer to FIG. 6)