Yokogawa PC-Based MX100 Bedienungsanleitung PDF herunterladen (Seite 42)

2-28

IM MX180-01E

The results of initial balancing are as follows.

Status box display Status

----- Not executed

Successful Initial balancing was executed successfully.

Failed Initial balancing failed.

OVER Initial balancing succeeded, but the output value exceeded the upper

limit or fell below the lower limit, and the value was rounded to the

upper limit value or the lower limit value.

Executing Executing initial balancing

Note

If initial balancing fails, “ ” is displayed in the 7-segment LED on the main module.

Check the installation status of the strain input module and perform the initial balancing again.

If the error occurs even after

rebalancing, servicing is required. Please contact your nearest

Yokogawa representative.

Scaling Settings When Using a Strain Gauge Type Sensor

The following is an explanation of scaling settings used when measuring physical

quantities such as load and length with a strain gauge type sensor.

The basic relational expression is as follows.

1 mV/V = 2000 µstrain (Equation 1)

Two examples are given below: 1) when rated input and output are listed in the user’

manual of the strain gauge type sensor, and 2) when listed with the calibration coefficient.

(hereinafter, “µstrain” will be expressed as “µStr.”)

When Rated Input and Rated Output Are Given

A specific example is given below.

• Rated input 200 N (set to Y)

• Rated output 0.985 mV/V

(set to K)

In this case, these figures indicate that if a 200 N load is applied, 0.985 mV/V is output.

From the relationship in equation 1, if 200 N is applied,

an output of 0.985 mV/V=0.985×2000=1970 µSTR is attained.

In other words, for each 1 N, 1970 µSTR/200N= 9.85 µSTR/N is output.

Therefore, the scaling settings are entered as follows.

When Measuring at 50-150 N

Scale minimum: 50 (units: N) (set to Smin)

Scale maximum: 150 (units: N) (set to Smax)

therefore,

Span minimum: 50

×9.85mSTR/N = 492.5 µSTR

Span maximum: 150×9.85 =1477.5 µSTR

...can be set.

Thus, the measuring range is 2000 µSTR.

2.4 Setting the Measurement Conditions (Setting the Measurement Channels)

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