Unipulse F805AT-CK, Operation Manual

Page: 110 / 129

14.TROUBLE SHOOTING
99
CAL. ERR. 2 (Calibration error)
Initial Dead Load is above Zero adjustment range.
Remove any excess load from loadcell or scale. If CAL.ERR.2 is still displayed, connect a resistor
EXC and -SIG. loadcell connections. This should shift the Zero point.
Do Zero Calibration again.
- This table is for a 350 ohm loadcell.
When 4 load cells are connected in parallel, the sensitivity decrease to 1/4. Be aware that the
resistance also decreases to 1/4 accordingly.
- The temperature coefficient of the connected resistor directly influences the accuracy of the
indicator. Use a resistor with a temperature coefficient below 50ppm.
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 kΩ 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
bEXC and -SIG.
+EXC
+SIG
-EXC
-SIG