Installation of the 924 Analyzer Transmitter System will vary with the application. In most cases the user has
determined which type of sensor mounting is required. Prior to installing the system, the following
determination should be made:
What is the measurement required?
What are the sample handling requirements for proper sensor mounting?
Physical installation considerations.
Once installed, the system should be calibrated with the sample it will be monitoring. The following paragraphs
provide procedures to install and calibrate the system.
UNPACKING AND INITIAL INSPECTION
Both the sensor and transmitter are packed in the same carton. Upon receipt of the units, inspect the shipping
carton as well as the units themselves for obvious damages, such as dislodged components. The sensor
should also be checked for any physical damage.
When shipped, the sensor's membrane cap is covered by a protective cap which serves not only to prevent
damage to the membrane but also has a foam pad which is wetted with electrolyte solution.
Do not subject sensor to freezing or sub-freezing temperatures since doing so may
damage the unit.
INSTALLATION OF THE ANALYZER/TRANSMITTER
The 924 Analyzer/Transmitter is contained in a NEMA 4X thermoplastic, weatherproof case and may be
mounted on a wall or handrail (see Fig.8). Mounting in an area where excessive vibrations exists should be
avoided. To provide power to the analyzer and to connect sensor refer to Fig. 3 and proceed as follows:
Before connecting 120 VAC/220 VAC power to terminal GRN, N, L, Fig. 3 verify that power supply
transformer is appropriately connected for that voltage.
Connect sensor to terminals 3, 5, 6 & 7, Fig. 3.
The pH sensor is connected to the BNC connector and the two lead wires from the pH sensor
thermistor should be taped and left disconnected.
Complete external wiring connections using Fig 3.
Connect solution ground to 14 (Fig. 3).