Specifications

1.3.CTX 300 calibration

Method 1: CTX 300 with display (excluding O

, see page 17)

The sensor is operating: the green light (Ref. 1, Fig. 10) is lit and the display screen shows the

measurement level.

Flip the maintenance switch (Ref. 2, Fig 9) into the “CAL” (calibration) position: the yellow light

(Ref. 3, Fig. 10) will be lit and the sensor will send a 2 mA current to the central controller

(maintenance mode).

Verify that the sensor is located in a clean-air environment. If not, inject synthetic air at a flow rate

of 30 l/h.

Wait for the measurement to stabilize (displayed on screen) and adjust the ZERO by using the

ZERO potentiometer located on the sensor pack. (Ref. 1, Fig. 11)

Inject the recommended calibration gas at a flow rate of 30 l/h.

Wait for the measurement to stabilize and adjust the sensitivity by using the sensitivity

potentiometer located on the sensor pack. (Ref. 2, Fig. 11)

Ref. 2

Ref. 3

Fig. 9

Ref. 1

CAL

Fig. 11

Ref. 1

Ref. 2

Fig. 12