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DAQP-CFB2

120 Ω

100 kΩ

±7 V

±7 V, 50 mA

100 kΩ

TEDS

100 Ω

33 pF

100 kΩ

Inductive

full bridge

100 Ω

100 kΩ

350 Ω

50 kΩ

1 kΩ

x10

x100

x1000

x10

OFFSET

DAC

Phase

adjustment

±90 °

Sine generator

0.6 to 20 kHz

Single

master

Crystal

oszillator

PLL

REF

Slave

Master

2.5 V

RMS

CLK

EXC+

SENSE+

R+

IN+

IN-

SENSE-

EXC-

TEDS

GND

order

reconstruc-

tion fi lter

0.48 x f

order

lowpass fi lter

10 Hz to 3 kHz,

OFF

}

Quarter bridge completion

Shunt

INPUT

CONNECTOR

OUTPUT

CONNECTOR

9-pin DSUB

9
4

SYNC

IN / OUT

OUT

DAQP-CFB2

Apply shunt:

Press the

FILTER

button for more than 3 seconds to apply the internal shunt

resistor as long as you keep the button pressed.

Apply Zero ref.:

Press the

RANGE

button for more than 3 seconds to shortcurcuit the module input

as long as you keep the button pressed.

Amplifier balance: Press the

RANGE

button for more than 3 seconds (zero reference). Keep the

RANGE

button pressed and push the

FILTER

button in addition. This will set

the module offset to zero. The calibration values will be stored in the module!

This function is independent from the sensor and takes approx. 2 seconds!

Sensor balance:

Press both

RANGE

and

FILTER

button together for more than 2 seconds.

This will set the offset of a connected sensor to zero. The sensor offset

correction is working within ±400 % of full scale range.

Factory default:

Press both

RANGE

and

FILTER

button at power up for approx. 3 seconds to

set the amplifier to factory default settings (full bridge, 100 mV/V, 5 V

RMS

Bessel, module address 0x00, 100 kΩ shunt, power-on-default off,

manual

control).

Free variable gain and offset

The programmable gain amplifier (PGA) combined with the variable gain amplifier (VGA) allow a wide input

gain from 0.1 mV/V to 1000 mV/V. The offset is free programmable between ±400 % of the input with a

resolution of 17 bit. So it is possible to normalize almost any sensor signal to the ±5 V amplifier output.

450134 • DAQP/H

/PAD Modules • Technical Reference Manual • Prin

ing version 2.3.4 • November 18, 2020

Содержание DAQP-CFB2

Страница 1: ...ll supply you with accurate complete and reproducible measurement results for your decision making Look forward to the easy handling and the flexible and modular use of your DEWETRON product and draw upon more than 30 years of DEWETRON expertise in measurement engineering ISO9001 EN ISO 14001 THE MEASURABLE DIFFERENCE ...

Страница 2: ... protected by copyright All rights are reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws All trademarks and registered trademarks are acknowledged to be the property of their owners ...

Страница 3: ...use of the information in this document Warranty Information A copy of the specific warranty terms applicable to your DEWETRON product and replacement parts can be obtained from your local sales and service office Restricted Rights Legend Use austrian law for duplication or disclosure DEWETRON GmbH Parkring 4 8074 Grambach Austria Printing History Please refer to the page bottom for printing versi...

Страница 4: ...owing general safety precautions must be observed during all phases of operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product DEWETRON Elektronische Messgeraete Ges m b H assumes no liability for the customer s failure to comply with thes...

Страница 5: ...tained Keep away from live circuits Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform procedures involving cover or shield removal unless you ar...

Страница 6: ... com The telephone hotline is available Monday to Friday between 08 00 and 12 00 CET GMT 1 00 and Monday to Thursday between 13 00 and 17 00 CET For the Americas please contact DEWETRON Inc 2850 South County Trail Unit 1 East Greenwich RI 02818 U S A Tel 1 401 284 3750 Toll free 1 866 598 3393 Fax 1 401 284 3755 Email us support dewetron com Web http www dewetron us The telephone hotline is availa...

Страница 7: ... DAQ series modules available The CAL KIT contains the required cables software and instructions General module specifications Module dimensions 20 x 65 x 105 mm 0 79 x 2 56 x 4 13 in W x H x D without front cover and connectors Frontcover 20 x 87 x 2 mm 0 79 x 3 43 x 0 08 in W x H x D without connector Environmental Temp range storage 30 C to 85 C 22 F to 185 F Temp range operating 5 C to 60 C 23...

Страница 8: ...he FILTER button again Approx 3 seconds after the last key activity the information will be stored the LED stops flashing and shows the input range again CAUTION Power loss during this time leaves the module in the former settings 2 RS 232 485 programming All ranges and filters can also be selected via RS 232 485 interface All new DEWE 800 2000 2500 3000 4000 5000 series systems are prepared as a ...

Страница 9: ... mode typically 0 1 of reading 0 05 of range Max offset drift 0 003 µV V K 40 ppm of Range K Max gain drift 30 ppm K Balance adjusting range 400 of Range 200 at 1 V excitation Phase adjustment range 90 inductive mode only Balance adjusting accuracy within 0 1 FS Supported sensors 4 or 6 wire full bridge 3 or 5 wire bridge with internal completion software programmable 3 wire bridge with internal r...

Страница 10: ...s the older DAQP CFB module The new module has a higher accuracy and supports many more features Despite of all improvements it is still compatible with the older DAQP CFB Even the standard command set except custom range settings is downward compatible Replacing the old CFB by the new one should not require any changes in terms of sensor connection Front panel control LED indication Filter Range ...

Страница 11: ...eep the RANGE button pressed and push the FILTER button in addition This will set the module offset to zero The calibration values will be stored in the module This function is independent from the sensor and takes approx 2 seconds Sensor balance Press both RANGE and FILTER button together for more than 2 seconds This will set the offset of a connected sensor to zero The sensor offset correction i...

Страница 12: ... range This is useful if the DAQP CFB2 is used as an analog signal conditioner Input offset The input offset can be set 400 of the input range It is automatically recalculated when changing the measurement range The input offset is automatically determined with the sensor balance function Internal Completion Resistors The DAQP CFB2 has internal half bridge completion and internal quarter bridge co...

Страница 13: ...function sets the output to 80 of the actual range The calibration signal is based on the excitation voltage So this is a simple check of the excitation voltage Typical reason why the excitation is not working are short circuit of the excitation at the cabling or sensor defects too high load for the excitation amplifier please decrease the excitation voltage or incorrect setting of the synchronisa...

Страница 14: ... DAQP CFB2 synchronises the excitation voltage to the synchronisation signal No sync amplifier is required anymore when DAQP CFB2 is used in slave mode When switching into slave mode the frequency is auto detected and cannot be changed anymore Sync of up to 16 channels Synchronisation of the carrier frequency is required when Sensor cables of different CFBs are nearby Sensors are mounted on the sa...

Страница 15: ...200 5 0 1 of reading 0 05 of range 250 20 10 0 1 of reading 0 05 of range 500 10 5 2 0 1 of reading 0 05 of range 1000 5 1 0 1 of reading 0 05 of range 1250 2 0 1 of reading 0 05 of range 2000 0 5 0 1 of reading 0 05 of range 2500 2 1 0 1 of reading 0 05 of range 5000 1 0 5 0 2 0 1 of reading 0 05 of range 10000 0 5 0 1 0 2 of reading 0 2uV V 12500 0 2 0 2 of reading 0 2uV V 25000 0 2 0 1 0 2 of r...

Страница 16: ... Sense R 1 IN Sense EXC Shield 1 6 5 2 3 8 9 pin SUB D 4 TEDS GND 9 4 TEDS Data GND Potentiometric Sensor 200 Ohm to 10 kOhm Half bridge signal connection 5 wire and 3 wire sensor connection potentiometric sensors Sense terminals have to be connected to excitation also when 4 wire connection is used A potentiometer works like a half bridge sensor with 500 mV V sensitivity The scaling is 0 position...

Страница 17: ...n Sense is connected to EXC at the connector Quarter bridge signal connection Inductive bridge sensors LVDT Inductive half bridge sensors 3 wire quarter bridge is only able to compensate symmetric wire resistance Linear Variable Differential Transformers Sense Sense Sense Sense EXC EXC IN IN GND EXC EXC 1 1 6 6 2 2 4 3 3 8 8 Displacement sensors Pressure sensors Connectors Connectors Core Core 2 w...

Страница 18: ...ense for the ranges from 10 nF to 1 µF For ranges below 10 nF use two shielded cables for the measurement leads to avoid measuring parasitic capacitances Connect shield to pin 4 GND Measuring small capacitances To improve measurement accuracy of small capacitances perform a sensor balance with the test leads open to subtract the residual capacitance of the DAQP CFB2 and the leads CAUTION To avoid ...

Страница 19: ...se of 10 C warm up Offset Sensitivity Offset Sensitivity 2 wire 25183 µm m 4 97 956 µm m 0 18 3 wire 0 µm m 2 6 0 µm m 0 01 Cables To keep the influence of electromagnetic disturbances as small as possible shielded twisted pair cables are strongly recommended Connect the shield to the GND or the housing pin 4 The twisted pairs for all bridge modes are EXC PIN1 and EXC PIN8 Sense PIN6 and Sense PIN...

Страница 20: ...20 DAQP CFB2 Notes ...

Страница 21: ...ruary 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits 2014 30 EU Directive of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility recast The accordance is proved by...

Страница 22: ...C2 NOTES ...

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