DURAG D-R 290, Operating Manual

Page: 133 / 202

7 | Checking / setting parameters with D‑ESI 100
D-R 290 133
Fig. 7.8: Common parameters D‑R 290 Variables setting II
Signal range
Each channel must be assigned a measurement range with a start and end
(D‑ESI 100 designation: signal range start / signal range end). The reference check
value must be specified based on the measurement range setting (e.g. 70% of the
measurement range) as must the range for the 4..20mA current output (4mA = signal
range start, 20mA = signal range end). The dimensions of the signal range settings
correspond to the settings in the type code (see section 7.5.2 Type code [
}
127] ).
Settings
It is specified for the channel whether during the check measurement the last meas­
ured value should be retained or the reference check value output.
Zero range
Each channel has a zero range correction function. This allows specification that
measured values are set to <zero range (positive active) or measured values >zero
range (negative active) or measured values <>zero range equal to zero. This function
allows suppression of fluctuations around the zero point, negative values (positive ac­
tive) or positive values (negative active).
1. "Zero range: positive active"
-> y = x if x > +1×|ZR|
y = 0 if x ≤ +1×|ZR|
(measured values ≤ +1×|ZR| are set to 0)
2. "Zero range: negative active"
-> y = x if x < -1×|ZR|
y = 0 if x ≥ -1×|ZR|
(measured values ≥ -1×|ZR| are set to 0)
3. "Zero range: positive active" and
"Zero range: negative active""
-> y = x if x > +1×|ZR| or x < -1×|ZR|
y = 0 if x ≤ +1×|ZR| and x ≥ -1×|ZR|
(combination of the two above functions)
7.5.3.5
7.5.3.6
7.5.3.7