HDH / HDH-M / HDH 10K / HDH 10K-M
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: +358 10 219 9100 / Fax: +358 5 230 9210 info@produal.fi www.produal.com
Information is subject to change without prior notice.
SELECTING THE MEASUREMENT INFORMATION TO BE VIEWED ON THE DISPLAY
The measurement values scroll on the N model display. The wanted value can be locked to view continuously by
pressing the S1 button. You resume to the scrolling view by pressing the S1 button again.
NOTE: When the potentiometer (HD-PU) is configured to change the controller set point, the set point is shown on the
display when the potentiometer is rotated.
A. S1 button
NOTE: In M models, the shown measurement information can be selected also via Modbus.
ABCLogicTM SELF-CALIBRATION FEATURE
ABCLogic™ (Automatic Background Calibration Logic) is a patented self-calibration technique. ABCLogic™ method
eliminates the possible long term drift. ABCLogic™ method can be used when the CO2concentration drops at least
two times within a week to the level of approx. 400 ppm. Therefore the ABCLogic™ is effective in spaces that are not
continuously occupied.
ABCLogic™ can be deactivated in continuously occupied spaces.
Deactivating the ABCLogic™
The ABCLogic™ function can be deactivated by using the ML-SER tool.
CALIBRATION
If ABCLogic™ method is not in use, the device should be calibrated every 6-12 months. The recommended calibration
interval is 5 years even if the ABCLogic™ is in use.
ML-SER TOOL
With the ML-SER tool you can change the device settings, controller and Modbus settings for example.
Connecting ML-SER tool to the device
1. Remove the display / HD-AL3 option.
2. Connect the ML-SER cable to the connector.
A. ML-SER cable
CO2measurement value shows on the ML-SER tool display.
