Vaisala HUMICAP HM70, Быстрое руководство

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4. Install the probe in the measurement environment.
5. The basic display opens. Let the measurement reading stabilize.
6. For options on recording measurement data or examining the data as a graph, see
Displays and menus (page 15) .
Handle the probe carefully. Strong impact or falling can damage the
probe.
CAUTION!
If you need to disconnect the probe from the indicator, fir st press the Power
On/Off button to switch the indicator off. This ensures that all settings and data
are saved properly.
When disconnecting the cable, fir st loosen the metal ring by turning it
counterclockwise and then pull out the connector.
• If your probe includes the chemical purge option (available in HM70 series
probe versions B), remember to carry out chemical purge regularly.
• In case there is a risk of condensation, use the optional preheat when installing
the probe. The feature is available in HM70 series probe versions B.
See the HM70 User Guide (M210297EN) for more information.
3.2.1 Setting actual pressure value and unit
When measuring in pressurized environments, the actual process pressure value must be given
to HM70. The pressure can be given in the following units:
• hPa : Absolute pressure given in the unit of hPa.
• barg : Gauge pressure given in the unit of bar. Indicates the pressure differ ence between
normal atmospheric pressure and the actual process pressure.
• bara : Absolute process pressure given in the unit of bar.
• psia : Absolute pressure given in the unit of psi.
1. Open the menu by pressing Open .
2. Select Environment and press .
3. Press
Unit
to change the pressure unit. Default unit is hPa.
4. Press Set to set the ambient pressure value.
5. Set the pressure value with the arrow buttons. Press +/- to change the sign of the
pressure value. Press
OK
to save the value.
6. To return to the basic display, press Exit .
Chapter – Taking measurements
13
ENGLISH