DeltaOHM HD31, Руководство по эксплуатации

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HD31
- 5 -
V1.6
1 INTRODUCTION
HD31 is a portable multifunction and data logger instrument. It has a large (43 x 58 mm) color
graphic LCD display.
It is equipped with 3 independent inputs. Each input can be connected to individual and com-
bined SICRAM probes (intelligent and interchangeable probes capable to store calibration data
into memory) for the measurement of several physical qualities:
• Temperature
• Relative humidity
• Barometric and differential pressure
• Air speed
• Illuminance (lux) and Irradiance
• Carbon dioxide (CO
2
)
• Direct voltage and current
The type of probes connected to the different inputs is automatically recognized by the instru-
ment. The probes are supplied factory- calibrated and are interchangeable.
By connecting a combined relative-humidity and temperature probe, the instrument calculates
the derived humidity quantities: dew-point temperature, wet-bulb temperature, absolute hu-
midity, mixing ratio, partial vapor pressure, saturated steam pressure, enthalpy. The DI (Dis-
comfort Index) and the NET (Net Effective Temperature) indexes are calculated as well.
The instrument’s inputs can also be connected to non SICRAM probes, by using the relevant
interface modules between instrument and probe.
The display can show up to 36 quantities, three of which can be displayed simultaneously in nu-
meric format. A real-time measured quantity graph is shown in the display.
The measuring unit can be selected according to the measured physical quantity.
Data logging function with data storage in CSV format directly into the SD-type Memory Card, for
a long logging time (for example, with a 4 GB SD-type card, the logging lasts several months
even when recording several quantities with the minimum logging interval of 1 second). User-
configurable storage interval. Manual or programmed logging start/stop. Logging date/time stor-
age of each sample (automatically creates measurement reports in PDF format in the memory
card). Manual RECORD function (acquires the current measurement by simply pressing a button)
or automatic RECORD function (acquires the current measurement once per second) for the cal-
culation of minimum, mean and maximum values of the measured quantities.
HOLD function (holds current measurements on the display), REL function (difference with re-
gard to a stored value) and DIFF function (difference between two homogeneous measure-
ments, e.g., between the measurements of two temperature probes).
Functions reserved through user password. USB port with mini-USB connector for PC connec-
tion, for configuration and download of the acquired data. DeltaLog9 application software
supplied with the instrument.
It is provided with MSD (Mass Storage Device) mode, in which the instrument is seen by the PC
as a SD card reader, thus allowing direct access to the memory card for displaying, copying or
deleting the logging files.
Serial output for the print of the displayed measurements on a RS232C input printer. The Baud
Rate can be set from 1200 to 115200.
Lithium ion rechargeable battery. Automatic switch-off (may be disabled) after user-configurable
downtime (2, 5, 10, 15, 20 or 30 minutes) for preserving the battery life. External power supply
through USB input (with mini-USB connector) by connecting a 5 Vdc power supply unit or a PC
USB port (500 mA at least). With an external power supply unit connected, the battery is re-
charged and the automatic switch-off is automatically disabled.