ROTRONIC MP400H - Manual (Page 10)

E-M-HM-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroMet MP Humidity Temperature
Meteorological Probe: User Guide Instruction Manual
Document Type
Page 10 of 19
Document title
© 2009; Rotronic AG E-M-HM-V1_10
Function / Setting HM HC2 Notes
Unit system X X
The HygroMet setting overrides HC2 probe setting regarding the
HygroMet signals. The HC2 probe settings still apply when the
probe is used alone
Make sure to use the same humidity symbol and the same
temperature unit for both the HygroMet and probe.
Out-of-limits value alarm X X
The HygroMet settings are independent from the HC2 probe
settings.
The HC2 probe settings have an effect only when the HygroMet is
enabled to monitor alarms generated by the probe
When out-of-limit values have been defined for the same parameter
for both the HygroMet and probe, any alarm is triggered based on
the narrowest set of limits (assuming that the HygroMet has been
set to monitor probe alarms).
Analog outputs X X
Parameter and scale
The HC2 probe settings have no effect on the HygroMet
5 Mechanical installation
5.1 General guidelines
Install the HygroMet MP so that the local conditions at the sensors are typical of the environment to be
measured:
a) Use either a shield or a shelter to protect the probe and sensors from direct exposure to solar
radiation and precipitation. Several shields are available from ROTRONIC (see specifications).
b) In an open field, install the probe at least 6.6 feet (two meters) above ground. Increase this
distance if the ground surface is concrete or black top (such as above a roof).
6 Electrical installation
6.1 General wiring guidelines
Power supply wiring
Heavy machinery and instrumentation should not share the same power supply wiring. If this cannot be
avoided, noise filters and surge protectors should be used. Most UPS devices have those features already
integrated.
General guidelines for signal cables
The following guidelines are derived from European Standard EN 50170 for the transmission of signals by
copper wires. When planning an installation, the rules provided by EN 50170 should be followed under
consideration of local circumstances to determine the position of machines and equipment.
All ROTRONIC products are tested for Electromagnetic Compatibility according to EMC Directive
2004/106/EG and following European standards: