GASTRON GTD-2000Tx, Instruction Manual

GTD-2000TxW

Instruction Manual

7. System Mode

7.2.2. Span Calibration

CALIBRA.

MODE

- Contact "↑" or "↓" key to select "Calibration Mode".
- Contact "FUNC" key when "CALIBRA. MODE" is displayed to enter Calibration Mode.
- Contact "RESET" key to return to Measuring Mode.

CALIBRA.

[SPAN]

- Contact "↑" or "↓" key to achieve [SPAN] then contact "FUNC" key to enter Span Calibration mode.

SPAN CAL

[ NO]

- Contact "↑" or "↓" key to achieve [YES] then contact "FUNC" key to perform Span Calibration.

SPAN GAS

[     50]

- Using a calibration tool, inject the standard gas to the sensor at a flow rate of 500 mL/min for 90 sec. 
    After the measurement is stabilized, press "FUNC" key to enter the next mode.
- When Hold function in Maintenance Mode is on, the current maximum SPAN gas value is held and 
    displayed in the first row.
- The current measurement is displayed in the second row.

[      50]
[      50]

SPAN SET

[     50]

- It is a mode to set standard gas value. When there is no "Fail" message, contact "↑" or "↓" key to set 
    a value.
- When the inject standard gas value is abnormal, it displays Fail message. Fail message is as follows. 
    Fail message and span set value are displayed alternatively.
    ① "LOW FAIL" occurs when the difference between injected gas value and zero calibration value is 
    below 1%.
    ② "HIGH FAIL" occurs when injected gas value is above 95% of total ADC input range.
- "RING FAIL" occurs when injected gas value runs in the current set span value, it exceeds 95% of ADC 
    input range. The above FAIL messages are automatically released if the status is normal after adjusting 
    SPAN value.

SPAN SET

LOW FAIL

SPAN SET
HIGH FAIL

SPAN >>

[SUCESS]

- After completing standard gas value setting, contacting "FUNC" key automatically runs Span Calibration.
    When it suceeds, "SPAN SUCCESS" is displayed on LCD display for 2 sec then it changes to 
    "CAL DATA" Mode.
- When span calibration is not successful, "SPAN FAIL" is displayed for 2 sec and it changes to 
    "Cal. Data Mode".

SPAN >>

[  FAIL  ]

CAL.DATA

[      0]

- It is a mode to display measurement after calibration and checks whether calibration is successful after 
    performing auto calibration.
- Contact "RESET" key to return to "Calibration mode".