Hanna Instruments HI 904 - Manual (Page 29)

2-7
SETUP
2.3.4 Titrator Assembly
Note: Assembly operations must be completed before connecting the titrator to the power supply!
2.3.4.1 Connecting the Air Pump
The diaphragm air pump system is designed to work with the specially designed bottle top
assemblies. It allows the reagent in the titration vessel to be removed and/or replaced with
minimal exposure of the interior of the vessel to ambient moisture from atmospheric humidity.
Connect the air pump with the following steps (see Figure 1):
(1) Retrieve the air pump cable (PUMP 1) from inside the left bay. Connect the cable
to the air pump as shown in Figure 1. The air pump connector is located on the
left side of the motor.
(2) Lower the pump into the titrator, then slide it towards the front of the titrator
chassis until it is firmly latched.
(3) Secure the pump with the locking screw.
Figure 1.