5-8
IM WT310E-02EN
Rated Integration Time
In the D/A output of integrated values, 5.0 V FS represents the integrated value when the rated range
value is applied for the rated integration time. The same is true if scaling is enabled or the value for Σ
is being measured. The default setting is 1.00.00 (1 h, 0 min, 0 s).
• Range: 0.00.00 (00 h, 00 min, 00 s) to 10000.00.00 (10000 h, 00 min, 00 s)
If you set the rated integration time to 0.00.00, the D/A output value will be 0 V.
Note
• When the MAX hold feature (see section 4.6 in the User’s Manual, IM WT310E-01EN) is enabled, the
maximum held values (MAX values) for the following items are displayed. The maximum held values (MAX
values) are also output in D/A output.
Voltage, current, active power, apparent power, peak voltage, peak current
• D/A output is performed for each output item with 5.0 V FS representing the application of the rated range
value for voltage, current, and power.
• Even when scaling constants are set for voltage, current, and power, the D/A output of 5.0 V FS
represents the application of the rated range value.
• Even if the elements have different scaling constants, when you set the element to Σ, 5.0 V FS of D/A
output represents the application of the rated range value to each element.
• The D/A output for all math functions except for those indicated below is 0 V.
Efficiency, average active power during integration
D/A Output Range Mode (Range Mode)
You can select the D/A output range mode from the following options. The default setting is Fixed.
You can set this feature by sending communication commands through the communication
interface. You cannot set this feature from the display menu of this instrument. For details, see the
Communication Interface User’s Manual, IM WT310E-17EN.
Fixed (Fixed range mode)
When a measurement function’s rated value is received, +5 V is output. For details, see “Relationship
between Output Items and the D/A Output Voltage” on page 5-10.
Manual (Manual range mode)
You can set which measurement function values result in a D/A output of -5 V, and which result
in a D/A output of +5 V. By doing so, you can enlarge or reduce (zoom) the D/A output of each
channel. For example, if you are measuring a current that fluctuates between 0.6 A and 0.8 A with
a measurement range of 1 A, when the D/A output range mode is Fixed, the D/A output voltage will
fluctuate between 3.0 V and 4.0 V. When you want to observe the fluctuations more closely, you can
use the D/A zoom feature. If you set the D/A output range mode to Manual and set the minimum
value to 0.6 and the maximum value to 0.8, the WT1800 will produce –5 V when the measured
current value is 0.6 A and +5 V when the measured current value is 0.8 A.
5.3 Producing D/A Output
