Ametek TR-2100 Operation Manual page 44

TR-2100 User Manual
Once these values have been set up, the Calibration program displays will be giving relevant
information. The actual amplitude field will display the value that the input card would
report if no gain adjustment were applied. The card gain field gives a number between 0
and 2.0 that represents the gain applied to the actual amplitude. The resultant amplitude is
the final value that will be reported by the TR-2100. This field should end up close to the
expected amplitude.
Press the Adjust button to update the card gain values. This will produce a new resultant
amplitude. The values are sent to the TR-2100 memory, however the EEPROM value has
not been updated at this point.
When the field is red, the resultant amplitude is greater than 0.1% away from the expected
value. When the field is green, the resultant amplitude is less than 0.1% away from the
expected amplitude. This is a visual aid to help in determining that the gain adjustment is
correct. However, even after adjustment some of the fields may flash between red and green
or stay permanently at red. It is up to the user to determine if the resultant amplitude is
accurate enough.
Once the user switches cards or switches tabs or disconnects, the gain values will be written
to the EEPROM (see below).
Transducers
Inputs to be calibrated for transducers are performed in a similar way. If possible, the TR-
2100 should be calibrated with the transducer in place so that any errors introduced by the
transducer will be corrected. For 4 – 20 mA output devices, this must be done so that the 4
mA zero offset can be removed.
Updating Board Calibration Values
The Calibration program will automatically update the calibration parameters for a board
when the user switches tabs, switches cards or disconnects from the recorder. Switching tabs
refers to switching from offset adjustment to gain adjustment. Switching input cards refers
to switching from button "1-8 Card 1" to button "9-16 Card 2" or "17-24 Card 3" or "25-32
Card 4".
Whenever any update of calibration values has occurred (e.g. offset adjustment), the
EEPROM chip of the input card must have its calibration values updated. The program
detects if the user has changed any value at the previous tab or input card. If a change has
been made, a dialog box will pop up asking the user if he wants to update the EEPROM on
the input card.
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