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HD45 series
HD45 series instruments consist of transmitters, indicators and regulators suitable for measuring
and controlling, depending on model, the following environmental parameters:
• Relative humidity (RH)
• Ambient temperature (T)
• Carbon dioxide (CO
• Dewpoint Temperature (Td, computed value)
They are wall-mounted and have built-in sensors. Instruments are factory calibrated and do not
require additional intervention from the user. Power supply: 24Vac or 15...35Vdc.
HD45...
(HD45 BVR and HD45 BAR excluded)
"POWER" LED
Serial output with
mini-USB connector
• "POWER" LED: indicates the power supply state. In models without display, it blinks when
errors occur.
• LCD Display: it simultaneously shows all values measured by the instrument.
• LED level indicators: they show the air quality level (in HD45 BVR and HD45 BAR only).
• Serial output with mini-USB connector: it allows the connection to a PC for the instrument
configuration. Connection is obtained via the RS45 (not isolated) or RS45I (isolated) special
cable, which has a mini-USB connector to the instrument end, and a USB connector to the
computer end. The special cable has a built-in USB adaptor. With the RS45 cable, the instrument
is directly powered through the computer USB port. Attention: do not use standard mini-USB/USB
adaptor cable.
INSTALLATION AND CONNECTION
HD45
)
2
LCD
solo
HD45...D
- 1 -
Quick guide – ENGLISH
HD45 BVR and HD45 BAR
"Air quality"
LED indicators
Serial output with
mini-USB connector
Open the housing by pushing the
upper and lower tabs, then pull to
remove the front panel.
Quick guide
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Table of Contents
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Summary of Contents for Delta OHM HD45 Series
- Page 1 HD45 series Quick guide – ENGLISH HD45 series instruments consist of transmitters, indicators and regulators suitable for measuring and controlling, depending on model, the following environmental parameters: • Relative humidity (RH) • Ambient temperature (T) • Carbon dioxide (CO • Dewpoint Temperature (Td, computed value) They are wall-mounted and have built-in sensors.
- Page 2 Fix the base to a wall, with connectors at the bottom and the slot matching the connection cable output. Proceed with connections. Replace the front panel inserting the upper and lower tabs in their respective slots . Install the instrument at about 1.5m height above the floor and at least 1m distance from the corners.
- Page 3 RELAY OUTPUTS HD45…R models have one relay output, that can be associated to one of the quantities measured by the instrument. The potential free contact output is preset to close when the measurement value exceeds the threshold limit, and to open when the measurement value falls below the threshold limit minus the hysteresis.
- Page 4 LED INDICATORS IN HD45 BVR AND HD45 BAR MODELS HD45 BVR and HD45 BAR models are supplied with four LEDs showing the air quality level. Switching from one level to another is determined by the values of three thresholds, preset to 600, 800 and 1400 ppm.
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