Vigilantplant Daqstation DX3004, Руководство пользователя

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7
IM 04L75B01-01EN
LOG Input Function
Foreword
This section explains the LOG input function
.
For a description of other standard functions, see the
DX2000 User’s Manual (IM04L42B01-01E) and the
Communication Interface User’s Manual (IM04L41B01-
17E).
* The accompanying software application
DAQSTANDARD for DXAdvanced is the special
version for the DX3000 with these special functions.
The setting function for these special functions and
the saving setting data by ASCII or Excel format are
available on this special software.
LOG Input Specifications
■ Converting the LOG Input (Relationship between
the Input Voltage and Digital Display)
Trend display
(logarithmic scale)
: Displays the input voltage on a logarithmic
scale.
Digital display : Displays the result obtained by converting
the input voltage using the equation below.
The relationship between the input voltage of special LOG
range and digital display value is shown below.
VL VU
Y
1.0E
SL
1.0E
SU
Input X
Input voltage
Lower limit of display span
Scale lower limit
Upper limit of display span
Scale upper limit
: X
: VL
: SL
: VU
: SU
Digital display value Y=10
(SU-SL)*(X-VL)/(VU-VL)+SL
■ LOG Input Mode
• This mode allows you to measure the DC voltage input
(DCV: 20 mV, 60 mV, 200 mV, 2 V, 6 V, 20 V, and 50
V), convert to logarithmic scale, and display the data.
• Selectable span range: Same range as the DC voltage
input
Span Lower must be less than Span Upper.
• Selectable scale range: 1.0E-15 to 1.0E+15 (15
decades maximum)
Scale Lower must be less than Scale Upper.
• Select two or three digits for the mantissa.
• You can set the unit.
Setting the LOG Input
1.
Press MENU (switch to the setting mode).
2.
Select
Meas channel
>
Range, Alarm
.
3.
Select the channels in First-CH and Last-CH
.
4.
Set
Mode
to Log.
5.
Set the measurement range, the span, and the
exponents of the scale lower and upper limits.
LOG Input Setup Screen Example
Setup Item Selectable Items
(Selectable Range)
Description
Range Same as the DCV
range
Sets the range.
Span Lower Varies depending on
the input type
Sets the span lower limit.
Span Upper Varies depending on
the input type
Sets the span upper limit.
* Span Lower must be less
than Span Upper.
Scale Lower 1.0E-15 to 1.0E+15 Sets the scale lower limit.
1.00E-15 to 1.00E+15 when
the number of displayed
mantissa digits is 3.
Scale Upper 1.0E-15 to 1.0E+15 Sets the scale upper limit.
* 15 decades maximum.
* Scale Lower must be less
than Scale Upper.
1.00E-15 to 1.00E+15 when
the number of displayed
mantissa digits is 3.
Unit Up to 6 characters Up to 6 characters
Table 1 Log Input Mode Settings