Xir Calibration; 25% Oxygen Ultima/Ultima X Series Gas Monitor; Warning - Hach sc200 User Manual

Hide thumbs Also See for sc200:

Table of Contents

For the SPAN function, ambient air is generally adequate for the

25% oxygen Ultima/Ultima X Series Gas Monitor as the expected

default span value is 20.8%. Therefore, when the display prompts

"APPLY SPAN GAS" it would be adequate to simply allow the

countdown to occur without applying gas.

NOTE: If the sensor is located in an area of normally low or enriched

oxygen, then a 20.8% oxygen sample must be applied when

the display prompts: "APPLY SPAN GAS".

XIR Calibration

Although a full calibration (zero and span) can be performed on the

Ultima XIR Gas Monitor, a no-gas calibration is sufficient to properly

calibrate the monitor. A zero adjustment is all that is required for a full

calibration. Normally, any degradation of the sensor's performance is

associated with slight drifts in its zero response which, in turn, will

adversely affect its span performance. Restoring the sensor's zero is

typically sufficient to restore its span performance.

A zero adjustment is performed by pressing the ZERO button on the

Calibrator or Controller and following the "Zeroing" instructions given

earlier in this chapter. After completing the zeroing function, perform a

span check to ensure proper operation. If the span check is

unsuccessful, perform a full calibration.

NOTE: For calibration of an XIR sensor operating with a Flow Cap,

temporarily replace the Flow Cap with the Environmental

Guard (packaged with the instrument) and perform the

following procedure.

The Calibration Cap must be removed from the XIR

environmental guard after completing the Zeroing and/or

Spanning procedure; otherwise, the sensor cannot

perform properly.

Show Quick Links

Table of Contents