FMS CMGZ411, Руководство по эксплуатации

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Operating Manual CMGZ411/421
17
9 Initial operation of measuring amplifier
9.1 Initial operation of measuring amplifier CMGZ411
Simulating method (recommended)
The following operating instructions describe operation and calibration in the machine; the web tension can
be simulated by a weight.
•
Connect the first sensor
•
Check, if a positive value is displayed when loading the
first sensor in measuring direction. If not, change terminals
z6 / z8 (2 / 3 with CMGZ411.E) at the controller.
•
Connect the second sensor
•
Check, if a positive value is displayed when loading the
first sensor in measuring direction. If not, change terminals
z6 / z8 (2 / 3 with CMGZ411.E) at the controller.
•
Press key "PARAMETER" for 3 seconds
•
Select parameter „nominal force“ with
↑
or
↓
keys.
Confirm with
↵
key , input nominal force of the sensors with
↑ ↓ ←
keys
and confirm with
↵
key.
•
Select parameter „1 or 2 sensors“ with
↑
or
↓
keys. Press
↵
key, select number of sensors with the keys
↑
↓ ←
and confirm with
↵
key.
•
Insert material or rope loosely into the machine.
•
Select parameter „Find offset feedback“ with
↑
or
↓
keys. Press
↵
key for 3 seconds. The electronic
calculates automatically the offset value and stores it under parameter „Value offset-feedback“.
•
Load material or rope with a defined weight
•
Select parameter „Calibration Feedback“ with
↑
or
↓
keys and confirm with
↵
key. Input the force
referring to the applied weight with
↑ ↓ ←
keys and confirm with
↵
key. The electronic calculates
automatically the new gain value.
•
Go back to initial screen with „HOME“ key.
Mathematical method
If the web tension cannot be simulated, calibration has to be done by calculation. This way of calibrating is
less accurate because the exact angles are often unknown and the effective mounting conditions, which
usually deviate from the ideal, are not taken into account.
For this purpose, the offset has to be adjusted as described above. The gain factor has to be calculated by the
following formulas and then entered under Parameter „Value gain-feedback“.
There are the following cases:
CMGZ411 with 1 Force measuring
bearing
Gain feedback = 1 .
sin
δ
* sin(
γ
/2)
CMGZ411 with 2 Force measuring
bearings
Gain feedback = 0.5 .
sin
δ
* sin(
γ
/2)
CMGZ411 with 1 Force measuring roller
Gain feedback = 0.5 .
sin
δ
* sin(
γ
/2)
With this setup, the display will show the
effective web tension value