horiba SF-1U, Instruction Manual

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E-10
6.2. Measurement
6.2.1. Wetting inside measuring tube
In the beginning of operation, liquid films break in the middle of the process because the
interior walls of the measuring tube are dry. In the manual/auto mode, let the measurement
gas or inert gas such as N
2
flow so that the films wet the interior walls of the measuring tube.
Note that the wetting operation may be necessary even during the measurement if the
equipment is left for a while without creating films.
REF .

Wetting will be smoothly done with the gas flow 5 to 20 percent of full scale of
the measuring unit.

Manual wetting operation
①
Press the START key for several times to several tens of times with intervals over one
second.
②
Watch the condition of films through the measuring tube window while doing above
operation.
③
Stop pressing the Start key after films reaches the Stop detector. Then wait for a while
until all the films pass the stop detector.

Automatic wetting operation
①
Press the START key for one second or longer.
②
Indication
ｄＰ：−−−−
appears on the display. Then, the equipment creates films
automatically for approximately every four seconds.
③
This operation will be finish after films reaches the Stop detector.
※
When operated during waiting: Stops when a short "pip" sound is heard.
※
When operated during measurement: Present measurement continues.
NOTE

Make sure that there is no film inside the measuring tube before pressing
the START key for measuring. If there are films inside the measuring tube,
it causes an inaccurate result.
6.2.2. Entering atmospheric pressure

For SF-1
①
Use the SELECT key to have the display ready for data entry ("hPa" stays lit on the
display).
②
Operate the SET keys to set the atmospheric pressure. (Setting range: 730
〜
1070hPa)
To enter 1013.3 hPa, press the SET keys (“
△
”,”
▽
”) simultaneously.

For SF-2
Since the integrated barometer enters the atmospheric pressure, no data entry is normally
necessary. For manual data entry, however, follow the procedure below.
①
Use the SELECT key to have the display ready for data entry ("hPa" stays lit on the
display).
②
Press the SET keys (“
△
”,”
▽
”) simultaneously for two seconds or longer.
③
The equipment will enter the manual atmospheric pressure data entry mode.
Data display
Ａ ⇒ Ｈ ,
Unit display (hPa) Staying lit
⇒
Flashing
④
Use the SET keys to enter the data. (Setting range: 730
〜
1070hPa)
To enter the initial value of 1013.3 hPa, press the SET keys (“
△
”,”
▽
”) simultaneously.
※
Note that if pressed for two seconds or longer, the manual mode will be reset.
NOTE

Make sure the setting of atmospheric pressure is correct. If the setting is
not correct, it causes an inaccurate result.