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コントロールユニット DayTronic IL70AのPDF マニュアルをオンラインで閲覧またはダウンロードできます。DayTronic IL70A 15 ページ。 In-line dc strain gage conditioner

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3. CALIBRATION

If the transducer calibration is unknown, the following calculation is useful to calculate an Equivalent Input

value for the factory installed, 59K Ohm shunt resistor. This will approximate the value assuming that the

mv/V sensititivity and bridge resistance of the sensor are known.

Sample Calculation: Assume that K = 3.000 mV/V for a 5000-pound loadcell

(fullscale) with a bridge resistance of 350 ohms.

Remote Calibration Check: The instrument can be placed in the calibration mode

(positive or negative) by shorting pin Power Common and SHP for positive or SHN for negative on the

lower I/O connector. Figure 4 indicates two methods of remotely entering the calibration mode

(external switch, or push button control). The Remote Cal function provides a convenient

method of periodically monitoring calibration of the instrument in the positive or negative realm.

DC Strain Gage Conditoner Module

(cont.)

25000 R

X =

K R

X =

where

Equivalent Input, % of full scale

bridge resistance, ohms

K =

transducer sensitivity, mV/V full scale

calibration resistance, ohms (59 k installed)

25000 x 350

X =

59000 x 3

Switch 1 - Mode -

Switch 2 - Volts -

Switch 3 - Current -

Switch 4 - Filter -

Switch 5 - Filter -

Switch 6 - Excitation -

Switch 7 - Zero Adj. -

Coarse Zero -

control with default calibration indicator.

Fine Zero -

Coarse Span -

with default calibration indicator

Fine Span -

Symmetry -

Over Range -

indicates the power input voltage is ON

Power -

Fig. 2 Front Panel Settings and Indicators

49.4%

of full scale = 2472 pounds

current (I) or voltage analog output

+/- 5 or +/- 10 Vdc when mode is voltage

4-12-20 or 4-20mA when mode is current

5 kHz or 200 Hz at 3 db, for 200 Hz switch 5 must be down

10 Hz or 200 Hz at 3 db, for 200 Hz switch 4 must be down

excitaton level, 2.5 or 5.0 Vdc - effects mV/V gain

extended (100%) or normal (20%) zero authority

16 position switch adjustment for stepped zero balance

16 turn potentiometer for fine zero balance control

16 position switch adjustment for stepped gain contr ol

16 turn potentiometer for fine gain - span control

adjust the negative output span to be equal to the positive output

indicates the analog output is 2% greater than mode selected

IL70A