Hach 3650 manual Selecting Type of Calibration, Select from the PC

3.4.3Selecting Type of Calibration

3.4.3.1Select from the PC

You can use the Configuration, Calibration mode command to select how the sensor is to be calibrated.

Note:

Only the calibration modes applicable to your sensor can be selected. Others will be grayed out.

Choose In Air to allow calibration of the sensor in air. Choose In Line to calibrate the sensor directly in the sampling line, in a sample of known gas content.

In instrument models that measure gaseous samples, you may select In a Span Gas to calibrate. Choose OK when the desired mode is selected.

Fig 3-11: Calibration Mode

Note:

Calibration mode can also be selected from the instrument keyboard (see below).

3.4.3.2Select from the Instrument

1)Switch the instrument power OFF

2)Switch the instrument on by holding down the CAL button and then pressing the POWER button while still pressing the CAL button

3)The instrument display will show either Air for in air calibration, SPA for span gas calibration or LI for in line calibration

4)Use the Up/Down Arrow buttons to change the mode to your choice

5)Press the STO button to set the selected mode. The instrument displays Sto for a few seconds, then returns to measurement mode