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written consent of the copyright owner. The Information furnished in this publication is preliminary and subject to changes without notice.

ZMD31050

Advanced Differential Sensor Signal Conditioner

Application Note PRELIMINARY

1. Startup

First you have to install driver and software form CD - refer KIT2 installation description

“CB_descr_*.pdf” (former name “tech_desr_comm._board_revxxx.pdf”) in folder “Manual Evaluation Kit

2.0” on CD for details.

For a demo application without hardware access it is not necessary to install the USB port driver. After

the end of software installation procedure you find two additional icons on your desktop or programs in

program menu:

• ZMD31050 (former ZMD31050 EV KIT)

• ZMD31050_SSC2 (former ZMD31050 EV KIT2)

ZMD31050 is tool supporting all features and functions in detail – recommended for being familiar with

the ZMD31050, design in a sensor, developing and verifying a configuration/application.

ZMD31050_SSC2 is tool, which is made for pre series calibration work. The configuration is displayed

as configuration words only, but this tool supports “ZMD SSC Kit command language” (SSC_CML).

SSC_CML enables to write command procedures for full automated calibration of sensor modules.

SSC_CML is in development now. Additional ZMD31050_SSC2 software enables mass calibration

using “ZMD SSC Mass Calibration Board” – a mass calibration solution, which calibrates up to 120

sensor modules in one batch.

1.1 ZMD31050 software

After starting ZMD31050

software has to be select

desired interface (lower

arrow).

ZMD31050 software is

applicable for KIT1 (in

software called

“ParallelPort-Kit”) and

KIT2 (“USBPort-Kit”).

ZMD recommends for first

steps I

C interface.

Founded hardware and

port is messaged in top of

the window, if

“Communication Board”

and “ZMD31050 SSC

Board” is connected at

the computer and was

found by the software

(upper arrow). ZMD31050

circuit revision number is

displayed in status line.

Summary of content (8 pages)

PAGE 1
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note 1. PRELIMINARY Startup First you have to install driver and software form CD - refer KIT2 installation description “CB_descr_*.pdf” (former name “tech_desr_comm._board_revxxx.pdf”) in folder “Manual Evaluation Kit 2.0” on CD for details. For a demo application without hardware access it is not necessary to install the USB port driver.
PAGE 2
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note PRELIMINARY To change type of interface select first “NULL” and then a new one. To verify command mode press “CmdMode” button, if applicable the “LED” near the “CmdMode” button is flashing green for some seconds. 1.2 ZMD31050_SSC software ZMD31050_SSC software supports only KIT2 (USB). After starting ZMD31050_SSC software connection status is displayed in header of window.
PAGE 3
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note T01100 set trigger, communication should start 100ms after power on IWT7800172 I2C, power on & send cmd: "72" = activate ZMD31050 command mode IW_7800102 I2C, send cmd: "02" = start cylce ram IR_78002 I2C, read 2 bytes of SIF output register => 0x2AEC digital readout result of conditioning PRELIMINARY change adjustment of potentiometer on sensor replacement board now => changed input signal IR_78002 I2C, read 2 bytes of SI
PAGE 4
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note 2. PRELIMINARY First Example The following example describes first steps being familiar with KIT2 and ZMD31050-software and ZMD31050.
PAGE 5
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note PRELIMINARY These values should be 0.5/4.5V. In most cases this wouldn’t be so and is caused by tolerances of all components/elements at the PCBs – calibration is necessary. This is the next step. • Open “Sensor-Calibration” dialogue (last picture) • A two point calibration (poti top & down) should be done. “Calibration Mode” is linear, no temperature behaviour. Adjust this like displayed in screenshot.
PAGE 6
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note PRELIMINARY now. New calibration is ready and result can be verified now. • Measure VOUT for top and bottom position of the poti. You should measure 0.5V for poti down end 4.5V for poti top end now. • Repeat the same procedure with reverse acquiring (pressing P2M instead P1M and otherwise). You will get a mirrored output function for this case. We see, the output signal can be inverted by calibration for the same input signal. 3.
PAGE 7
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note PRELIMINARY 4. Calibration Examples 4.1 Conditioning a Pressure Signal 4.2 Conditioning a Temperature Signal 4.3 1st step - acquire calibration data temperature out calibration target: • 0.5V at 0deg = 10% • 4.
PAGE 8
ZMD31050 Advanced Differential Sensor Signal Conditioner Application Note PRELIMINARY The information furnished here by ZMD is believed to be correct and accurate.