Thermo Scientific Sarasota FD910, Руководство пользователя

Страница: 23 / 61

Thermo Fisher Scientific Sarasota FD910, FD950, & FD960 User Guide 3-1
Chapter 3
Commissioning
Caution
Ensure all safety rules that apply to this equipment are followed
and any permits necessary for the work have been issued. Also ensure
obligations under the Health and Safety At Work Act are met.

Check all installation details and wiring against the recommended methods
in this manual.
If zener barriers or isolators are fitted, ensure they are correctly installed and
grounded/earthed where appropriate.
1. Connect the density meter to its signal converter or use a suitable bench
power supply set to 13–24 Vdc.
2. Switch on the power supply and check for 13–24 Vdc across terminals
1 (+ve) and 2 (common).
With the correct dc voltage applied to the empty instrument, a barely
audible sound can be heard from the instrument.
3. The frequency of the oscillating tube should be between 1250 and
1350 Hz (800 and 740
µ
s) when the instrument is full of air at
atmospheric pressure.
Stand the density meter on end and fill it with water. The frequency
should decrease approximately 400 Hz.
General
Functional
Checks