Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur télécharger pdf (Page 43)

f) Analog Input Calibration

NOTE: The analog inputs available for the TIO were calibrated at the

factory. There is no need to perform analog input calibration unless

the CPU IC, input amplifier IC or passive components from the analog

input circuitries were replaced. Any alteration of the analog input

scaling variables in the EEPROM table will VOID the calibration

warranty supplied with instrument.

NOTE: Check the actual input jumpers’ configuration before applying

any input signal to TIO. Be sure your input signal does not exceed

the maximum allowed level for corresponding input type (see Table

4.1). Do not apply voltages above 5.0 Vdc unless TIO input was

specifically configured in the factory for 0-10 Vdc (check actual

model number and specification). Exceeding maximum allowed input

level may cause inadvertent damage to the device circuitry.

The TIO analog output calibration involves calculation and storing the off-

set and span variables in the EEPROM based on two calibration points (0

and 100% F.S.). The 0-5 (0-10)Vdc output has only scale variable and 4-

20 mA output has offset and scale variables.

Power up the TIO instrument for at least 15 minutes prior to commenc-

ing the calibration procedure. Observe analog input jumper position (see

Figure 4.2) and connect corresponding type of the calibration signal

source device to pins 4 (plus) and 8 (minus) of the 9-pin D-connector.

Follow firmware prompts and apply calibration point values according to

on screen instructions. If calibration must be aborted, press ESC but

ton. When calibration is completed firmware will display new offset and

span values and ask press ENT button to save new calibration variables

to EEPROM or ESC to abort calibration and exit without saving. In the

end, the firmware will prompt with a confirmation message.

g) Pilot Calibration Timer

The Pilot Calibration timer accumulates operational hours since the last

time the unit was calibrated. The smallest increment value is 0.1 Hour

(6 minutes). The value of the timer may be reset by the user by pressing

RIGHT button. Once RIGHT button is pressed the confirmation screen

will appear with the “Yes” or “No” menu. Selecting “Yes” will reset the

pilot calibration timer back to zero.

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Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur Page 43