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< 4. Operation >
3-2
IM 19C1B3-01E
3.2 Preparation for Operation
Inspect the state of wiring installation before starting the steady state operation of the PUS400G
ultrasonic oscillator.
3.2.1 Inspecting State of Wiring Installation
Check to see that the wiring work has been properly executed to meet the following requirement:
• The ultrasonic vibrator cable must be properly connected to the right terminals (U1, U2,
S) on the ultrasonic oscillator.
• A power supply of the specified voltage with voltage fluctuation within the allowable
range must be available to Terminals L1 and L2 on the ultrasonic oscillator.
For precautionary purposes, check to see that the fuses (three places) are firmly installed.
NOTE
With the ultrasonic vibrator unconnected, the in-action pilot lamp will not light up even if power is
supplied. Do not operate the ultrasonic oscillator with the ultrasonic vibrator NOT in connect with
fluid. Attention should be given especially when an existing two-core shielded cable is used. With
the ultrasonic vibrator NOT in contact with fluid, some parts in the electric circuits are excessively
heated to a temperature higher than in ordinary operation. This is unfavorable in terms of the life of the
ultrasonic oscillator.
• The ultrasonic oscillator must be grounded (grounding resistance: 100Ω or below.)
3.3 Steady State Operation
The ultrasonic oscillator should be operated only when the ultrasonic vibrator is in contact with fluid.
If it is operated with the ultrasonic vibrator exposed to the air, or with no load, the temperature of the
electric circuit parts excessively rises, which has harmful effect on life of the ultrasonic oscillator.
Once the operation of the ultrasonic oscillator is started, it is unnecessary for the operator to control
it during the subsequence steady state operation. When inspecting the pH meter, however, check to
see that the in-action pilot lamp is ON.
3.3.1 If In-Action Pilot Lamp Goes OFF (Related information: Section 4.2)
If the in-action pilot lamp goes off, the possible causes are:
• Failure in Electric Circuits.
• Any fuse in the oscillator has burnt out.
[In Case Fuse Has Burnt Out]
Replace the burnt fuse with a new one. (Refer to Subsection 4.2.2.)
3.3.2 Stopping and Restarting Operation
For the prevention of trouble in the PUS400G ultrasonic oscillator and the ultrasonic vibrator, it is
important to avoid operating the ultrasonic vibrator with no load (i.e. NOT in contact with measurement
fluid.) When performing maintenance work (standard solution calibration, etc.) on the pH meter,
turn OFF the power switch in the ultrasonic oscillator and then pull the ultrasonic vibrator out of
measurement fluid. To restart pH measuring operation, immerse the ultrasonic vibrator in the
measurement fluid and then turn ON the power switch in the ultrasonic oscillator.
Summary of Contents for PUS400G
Page 1: ...User s Manual Model PUS400G Ultrasonic Oscillator IM 19C1B3 01E IM 19C1B3 01E 7th Edition ...
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