Siemens SIPART DR21 User Manual

5 Operation
5.4 Configuration modes
Manual
SIPART DR21
C73000-B7476-C143-08
177
5.4.6.6 Measuring range for PT100 two-wire connection (S8 = 5)
D MR/CR adjustment of the feed line resistance
Path 1: The feed line resistance is known.
- Enter the known resistance with parameter MR.--
- CR is ignored.
Path 2
: The feed line resistance is not known.
- Short circuit PT100-sensor at the measuring point.
- Call parameter CR and press the Enter key (11) until 0.00 Ω
is displayed.
- MR displays the measured resistance value
D MA/ME – set measuring range
Call parameters MA, ME, set range start and full scale:
Measuring range limits -200 _C ≤MA ≤ME ≤+850 _C
Specify temperature unit with S10.
D CA/CE – fine adjustment (only if necessary)
Call parameter CA,
Set signal to start of scale
Correct the display with CA if necessary
Call parameter CE,
Set signal to full scale,
Correct the display with CE if necessary
5.4.6.7 Measuring range for resistance potentiometer (S8 = 6, 7)
Path 1 : The start and end values of the R- potentiometer are known.
- Call parameter MA, ME, set start of scale and full scale:
0 Ω ≤MA ≤ME ≤600 Ω /2.8kΩ
- Parameters CA/CE display at R=MA 0%, at R=ME 100 %.
The following applies for a 3-wire connection: R = R
p
+R
L4
The following applies for a 4-wire connection: R = R
p
+R
L1
+R
L4
Path 2 : The start and end values of the R- potentiometer are not known.
- Call parameter CA ,
Move output to position 0 %, press the Enter key (11) until 0.0 %
is displayed.
- Call parameter CE,
Move output to position 100 %, press the Enter key until 100.0 %
is displayed.
- Parameters MA/ME show the appropriate resistance values.
- MP must be set so that there is no ’exceeding of the range’ (display (3):
oFL)

Siemens SIPART DR21 Specifications

General

Brand	Siemens
Model	SIPART DR21
Category	Controller
Language	English