Span Calibration - GASTRON GTD-2000TxW Instruction Manual

GTD-2000TxW
Instruction Manual

7.2.2. Span Calibration

- Contact "↑" or "↓" key to select "Calibration Mode".
CALIBRA.
- Contact "FUNC" key when "CALIBRA. MODE" is displayed to enter Calibration Mode.
MODE
- Contact "RESET" key to return to Measuring Mode.
CALIBRA.
- Contact "↑" or "↓" key to achieve [SPAN] then contact "FUNC" key to enter Span Calibration mode.
[SPAN]
SPAN CAL
- Contact "↑" or "↓" key to achieve [YES] then contact "FUNC" key to perform Span Calibration.
[ NO]
- Using a calibration tool, inject the standard gas to the sensor at a flow rate of 500 mL/min for 90 sec.
SPAN GAS
[ 50] 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
[ 50]
displayed in the first row.
[ 50]
- The current measurement is displayed in the second row.
- It is a mode to set standard gas value. When there is no "Fail" message, contact "↑" or "↓" key to set
SPAN SET
a value.
[ 50]
- 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.
SPAN SET
① "LOW FAIL" occurs when the difference between injected gas value and zero calibration value is
LOW FAIL
below 1%.
② "HIGH FAIL" occurs when injected gas value is above 95% of total ADC input range.
SPAN SET
- "RING FAIL" occurs when injected gas value runs in the current set span value, it exceeds 95% of ADC
HIGH FAIL
input range. The above FAIL messages are automatically released if the status is normal after adjusting
SPAN value.
SPAN >> - 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
[SUCESS]
"CAL DATA" Mode.
SPAN >>
- When span calibration is not successful, "SPAN FAIL" is displayed for 2 sec and it changes to
[ FAIL ]
"Cal. Data Mode".
- It is a mode to display measurement after calibration and checks whether calibration is successful after
CAL.DATA
performing auto calibration.
[ 0]
- Contact "RESET" key to return to "Calibration mode".
7. System Mode