Rockwell Automation 937CU-AISTR-DC1 Strain Gauge Converter Installation Instructions - Manual (Page 23)

Bul. 937
C Strain Gauge Converter Installation Instructions
Notes on Zero point and Adjust
• For the result of the adjust it does not matter whether you determine the zero point or the
adjust value first.
• Zero point and adjust value must be determined in the same unit (do not change the unit before
both operations have been performed).
• If you perform the adjust in a unit other than kg, a new adjust is required after changing the value
kg/unit .
• If you change one of the Excitation voltage, Sensitivity or Cell rating parameters, a new adjust is
required.
After an adjust, the gross value is calculated as follows:
This results in the following assignment: The zero point (in mV) is converted into 0 unit, the adjust
value in mV is converted into the adjust value of the selected unit, intermediate values and values
beyond the adjust value are converted proportionally:
Gross value = --
M--------- easu
-----
Ad
---r------
ed ---
just in
-----
val------ u--
m
e--- i
V
---n---
–
---
m-----
Ze
V------
ro
–-----
po
---
Zer
------
int
o----- p---o---i---n--t × Adjust in unit
0
mV
Unit
0
Adjust
Zero point Adjust
21