Ametek TR-2100, Руководство по эксплуатации

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TR-2100 User Manual 33
5 Calibrat i on
Introduction
The system calibration should be checked annually using the real time display functions. If
an error is found, a correction can be handled by one of two methods. Depending on the
amount of the error, use the appropriate method as follows.
Calibration Method #1
If the error is less than 0.5%, the full-scale value of a channel can be corrected to adjust the
value that is being read in the Real Time display, the Trigger section, or a Record. This can
easily be done without recalibrating the unit. It is only a software change in the
Configuration (Full Scale of any channel) of the TR-2100 unit. Note that the configuration
must be downloaded before the change will take affect.
Value Scale Full config New Scale Full Current
record screen the on reading Actual
read should record screen the on value the What
.
/
/
= ×
Calibration Method #2
If the error is more than 0.5%, then the channel in that unit should be recalibrated using the
“
MFR Calibration ” software application that is available from AMETEK. The program
allows simple calibration of the machine. Please note that the unit must be OFF LINE before
running the Calibration program. This is very important, as the program will not work
correctly if the unit is left on-line. It is recommended that the recorder be set to its working
sampling rate before calibration, using Display Station 32 configuration software. Updating
the calibration parameters will affect the internal system clock. The time should be reset
after calibration, using DS32.
TR-2100 Input Boards
The TR-2100 has a separate analogue input board for each 8 analogue input channels; i.e. a
32-channel system has 4 analogue input boards. Each analogue input board contains a small
non-volatile memory (EEPROM). This device is read when the TR-2100 is initialised. The
calibration values for that board are read from the EEPROM and stored in the memory of
the TR-2100. The calibration values are then used in all subsequent calculations performed
by the TR-2100. The calibration program has the capability to read from and write to the
chip. Once the program has set the calibration values, it will update the EEPROM.
The advantage of this scheme is that the calibration values are located on the input board. If
the board ever has to be changed, its calibration factors will travel with it so the system will
not need to be re-calibrated.
In the calibration program, each analogue input board is calibrated separately. The board is
selected using ‘radio’ buttons at the top of the window under
Card selection .