Unipulse F701-C

12.TROUBLE SHOOTING
161
(Calibration error)
Zero Calibration must be entered again.
Zero Calibration should always be done before Span Caibration. If “ ” appears after
Calibration, Zero Calibration must be entered again.
After Zero Calibration “ ” will disappear.
(Calibration error)
Initial dead load is above zero adjustment range.
Remove any excess load from load cell or scale. If is still displayed, connect a resistor
between +EXC and -SIG load cell connections. This should shift the zero point.
Do Zero Calibration again.
- This table is for a 350Ω load cell.
- The temperature coefficient of the connected resistor directly influences the accuracy
of the controller. Use a resistance having a temperature coefficient of 50ppm/ ℃ or more (recom-
mended value of about 5ppm/ ℃ ).
Resistor Strain
Ideal Approx. μ-STRAIN mV/V
875 KΩ 866 KΩ 200 0.1
437 KΩ 442 KΩ 400 0.2
291 KΩ 294 KΩ 600 0.3
219 KΩ 221 KΩ 800 0.4
175 KΩ 174 KΩ 1000 0.5
146 KΩ 147 KΩ 1200 0.6
125 KΩ 124 KΩ 1400 0.7
109 KΩ 110 KΩ 1600 0.8
97 KΩ 97.6 KΩ 1800 0.9
87.3 KΩ 86.6 KΩ 2000 1.0
79.4 KΩ 78.7 K
Ω 2200 1.1
72.7 KΩ 73.2 KΩ 2400 1.2
67.1 KΩ 66.5 KΩ 2600 1.3
62.3 KΩ 61.9 KΩ 2800 1.4
58.2 KΩ 57.6 KΩ 3000 1.5
54.5 KΩ 54.9 KΩ 3200 1.6
51.3 KΩ 51.1 KΩ 3400 1.7
48.4 KΩ 48.7 KΩ 3600 1.8
45.9 KΩ 46.4 KΩ 3800 1.9
43.6 KΩ 43.2 KΩ 4000 2.0
41.5 KΩ 41.2 KΩ 4200 2.1
39.6 KΩ 39.2 KΩ 4400 2.2
37.9 KΩ 38.3 KΩ 4600 2.3
36.3 KΩ 36.5 KΩ 4800 2.4
34.8 KΩ 34.8 KΩ 5000 2.5
Connect the resistor
between +EXC and -SIG.
+EXC
+SIG
-EXC
-SIG