YOKOGAWA PUS400G, Руководство пользователя

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< 2. Installation and Wiring >
2-1
IM 19C1B3-01E
2. Installation and Wiring
The PUS400G ultrasonic oscillator should be installed in a place where the power switch is easily
turned ON/OFF and the “in-action” pilot lamp. Install the PUS400G as close to the pH meter sensor
holder as possible.
This chapter describes how to select an installation site and procedures for installation and wiring.
2.1 Installation
The PUS400G ultrasonic oscillator may be installed outdoors. However, it should be installed in as
favorable an environment as possible in order to keep its electric circuits in good condition.
2.1.1 Installation Site
Install the PUS400G ultrasonic oscillator in a place where the following requirements are met:
• The PUS400G must be installed as close to the location of the ultrasonic vibrator as
possible.
The cable of the ultrasonic piezoelectric transducer (ultrasonic vibrator cable) built in the
sensor holder of the pH meter is at most three meters (flow-through type holder) or five meters
(submersion type holder) in length. The ultrasonic oscillator must be installed close to the
ultrasonic vibrator.
• The PUS400G must be installed in a place free from corrosive gases.
Corrosive gases damage the electric parts in the oscillator and should be avoided.
• The PUS400G must be installed in a place with less fluctuation in temperature at ordinary
temperature or a temperature close to ordinary temperature.
The fluctuation in temperature at the installation site should be within the range of -10 to 50°C.
• The PUS400G must be installed in a place where a humidity of 5 to 90% HR is maintained.
Avoid installing the ultrasonic oscillator in a place where a high or low humidity is maintained for
a long time. It is recommended to always operate the PUS400G at a humidity of 25 to 85% RH.
• The PUS400G must be installed in a place not exposed to direct sunlight.
Direct sunlight may excessively increase
temperature in the oscillator. If there is any high
temperature equipment nearby, temperature
in the oscillator may be also excessively
increased due to radiant heat. If temperature
in the oscillator is likely to rise and exceed
allowable limit due to direct sunlight, then install
a sunshade hood (optional)
Figure 2.1 Sunshade as Installed