User manual

Copyright © 2005, ZMD AG, 2005-05-17 4/8
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ZMD31050
Advanced Differential Sensor Signal Conditioner
Application Note PRELIMINARY
2. First Example
The following example describes first
steps being familiar with KIT2 and
ZMD31050-software and ZMD31050.
• Plug all 3 delivered PCBs in order
Communication Board (CB) –
Sensor Signal Conditioner Board
(SSC) - Sensor Replacement Board
(SR) together and connect these to
the USB port of your computer
• Verify wrapped jumper connection
at SSC: K5 (Vsupply), K10 (Bridge
Mode Voltage) and at SR: K4 (BR)
• Start ZMD31050 software and
activate USB Port access via I2C
interface (refer chapter 1.1) and
verify accessed board and
command mode
• Open File menu and load
“31050_kit_default.31050” configuration. These file contains needed programming data for
ZMD31050 circuit to adjust/configure the ZMD31050 for application completely. These file or set of
data is called following “config”.
“31050_kit2_default.31050” config is loaded in software now.
These config is made for KIT2 to learn basics in handling of
KIT and ZMD31050. A short description of the loaded config
is displayed as info text. These config gain the input signal -
generated by the sensor replacement (SR) and was
calibrated to deliver 0.5/4.5V for SR potentiometer top/down
end adjustment. To verify this you have to do:
• Connect a DMM to the analog out of the ZMD31050. Use
“SSC: K10 – pin OUT“ and “SSC: K10 – pin GND”
measure point for this. Now the DMM measures the
analog output signal (VOUT). Refer ZMD31050 SSC
Board description for details.
• Adjust SR – potentiometer (poti) in middle position.
• Press “Write+Cyc_RAM” button: Loaded config is written
(Write) to ZMD31050 and started (Cyc_RAM) now.
• Check measured VOUT at the DMM: VOUT should be
approx. 2.5V and should be alter at changing SR – poti
adjustment.
• Measure VOUT for top and bottom position of the poti.
Loading a saved configuration
Write to 31050 and starting a config
Open “Sensor calibration“ dialogue