DayTronic IL70A Руководство - Страница 10

Просмотреть онлайн или скачать pdf Руководство для Блок управления DayTronic IL70A. DayTronic IL70A 15 страниц. In-line dc strain gage conditioner

3. CALIBRATION

Set the Coarse Zero control to position 8 and Coarse Span control to position 0.

(b)

Position the front panel switches to the desired settings for the application. Refer to Fig. 2

(c)

for details. Connect readout device (i.e. voltmeter) to ANO & A Common.

With the transducer unloaded, adjust the Coarse Zero and the Fine Zero control until the

(d)

desired analog output is achieved. If greater zero authority is desired, place the front panel

Switch 7 - "Zero Adj" to the extended range. This will allow the user to obtain 100% zero offset control.

The Normal postion of switch 7 allows for approx. 25% Zero authority.

Apply a known dead weight value which is greater than one half of full scale

(e)

in the positive direction or activate the "SHP" terminal (shunt positive) by connecting"SHP" to

"Power Common" as described in Fig. 3. Adjust Coarse Span to obtain your nominal full scale

analog output. Use Fine Span control to adjust the signal to the precise value required (or for an

analog value that correspondes with the appropriate Shunt Calibration value). Unload the

transducer and check "Zero" and adjust as necessary. Repeat Span load and verify values. If the

transducer is to be also used in the negative realm, load the transducer in the negative direction

with the the same dead weight value or activate the "SHN" (shunt negative) and adjust the

Symmetry control until you obtain the proper negative output reading.

Repeat step (e) as needed to obtain analog output precision. Note that any Span (gain)

(f)

adjustments will effect the Zero (balance) value.

Note: When appling the SHUNT resistor value for calibration, the sensor should be in an "unloaded" condition.

When completed, ensure connections and proper shielding are correct to the moduleand re-install the top conver

to the IL70A case.

DC Strain Gage Conditoner Module

IL70A

Calibration

IL70A.3