Manual

E-M-HM-V1_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroMet MP Humidity Temperature
Meteorological Probe: User Guide
Instruction Manual
Document Type
Page
8 of 20
Document title
© 2009-2011; Rotronic AG E-M-HM-V1_12
MEASUREMENT LOOP VALIDATION
Functions
Description
► Simulator mode
Used to make the HygroMet generate fixed values for the
humidity, temperature and calculated parameter. Can be
configured, enabled or disabled
DEVICE SAFEGUARDS
Functions
Description
► Device write protection
Used to protect the HygroMet with a password to prevent
unauthorized digital access by a digital user. Can be configured,
enabled or disabled
PROCESS PROTECTION AND PROTECTION OF OTHER DEVICES
AirChip 3000 Functions
Description
► Limit humidity output to 100 %RH
This probe function is used to prevent the humidity signal from
exceeding 100 %RH when condensation forms on the sensor.
Can be enabled or disabled
► Out-of-limit value alarm
Used to specify the normal range for humidity, temperature and
the calculated parameter depending on the user application.
Can be configured, enabled or disabled
Out-of-limit values trigger a digital alarm which can be also be
seen on the optional display
► Bad sensor alarm
This is a built-in probe function. Cannot be disabled
A bad humidity or temperature sensor triggers a digital alarm,
provided that the HygroMet is set to monitor probe alarms
► Fail safe mode
Used to specify a "safe" fixed value for humidity and for
temperature (HygroMet or probe) in the event of:
o Loss of communication with the probe (HygroMet function)
o Sensor failure (probe function)
Can be configured, enabled or disabled
4.3 Factory default settings
Configurable Settings
Applicability
Factory default
Unit system (Metric or English)
2-wire, 3-wire
As per ordering code
Analog signal type (4…20 mA or other)
3-wire
As per ordering code
Psychrometric calculation
2-wire, 3-wire
As per ordering code
Fixed pressure value
2-wire, 3-wire
1013.25 hPa or 29.92 In Hg
Output 1 parameter, scale and unit
2-wire, 3-wire
As per ordering code (%RH or other)
Output 2 parameter, scale and unit
2-wire, 3-wire
Temperature, unit as per ordering code
Communication protocol
3-wire
RO-ASCII
RS-485 address
3-wire
0
Device name
2-wire, 3-wire
Instrument model