ML-x17 DATA LOGGER MANUAL
Manufacturers of low power instruments
page 36
4.9 Option boards
Option boards can be used to add additional inputs, outputs, ports to an ML-x17 data logger or to perform
signal conditioning. You can mechanically stack up to 3 option boards, but only one board per category ID
(CID, internal bus address). Some boards are having a switch or solder jumper to choose a different CID,
so you can stack multiple similar boards. Converter boards (OC) don't have CID's and you can stack as
many OC-boards as mechanical feasible. OC-boards don't make use of the internal control bus, but are
wired to existing inputs/outputs/ports.
This menu is to indicate which option boards are mounted.
•
ML-OI-AD (Input) boards can be used to add additional analog inputs.
•
ML-OI-COM (Input) boards can be used to add an additional serial input port.
•
ML-OA (Accessory) boards can be used to add a (secondary) accessory, e.g. to have a TFT-
display as well as a camera on the same logger, or a dual camera to capture up/down
stream/track pictures.
•
ML-OI-AX (Auxiliary Input) boards can be used to add additional pre-processed sensors/inputs.
•
ML-OO (Auxiliary Output) boards can be used to add additional outputs (e.g. open collectors).
•
ML-OU-BLE to add a Bluetooth LE user interface for Android ydocTerminal.
4.9.1 ML-OI-AD-10V/20MA/80MV/2000MV (analog inputs)
4.9.1.1
Calibration
To get the best accuracy from your analog inputs we recommend to perform a two point user calibration
(See chapter: Analog inputs
– Determine linear conversion). When a two point calibration is not feasible
due to the nature of the input source, we recommend to do a 1 point calibration (See chapter: Analog inputs
– Determine linear offset) . If a one point calibration is not feasible either, please perform a zero-calibration.
4.9.1.2
Zero-calibration
1. Specify the correct theoretic range of your sensor (see chapter: Analog inputs -
Parameter value at)
2. Disconnect your sensor
3. For single ended inputs connect the input to ground and for differential inputs short-cut
the two differential inputs.
Option boards
[0] Exit
[1] Analog (OB1) >> ML-OI-AD-80MV
[2] Analog (OB2) >> ML-OI-AD-PT1000
[3] Barometric >> None
[4] Humidity >> None
[5] Serial port >> ML-OI-COM-SDI12
[5] Accessory port >> ML-OA-RS232; OB Camera
[6] Auxiliary inputs (OB1) >> ML-OI-AX-RH
[7] Auxiliary inputs (OB2) >> None
[8] Auxiliary output (OB1) >> ML-OO-MODBUS
[9] Auxiliary output (OB2) >> None
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