MT4299E Rev.1
15/10/2019
Pagina 11 di 55
2.5)
Detector power ON
When the detector is powered on, the green LED DL1 on the motherboard starts blinking at
slow intermittence.
After nearly two minutes, the red LED flash rate is equivalent to the detector working status (see
table below).
Once the warm-up phase is over, the detector can work correctly, although the optimal
performances will be achieved after two hours.
2.6)
Testing and Use
Detectors are factory calibrated for the specific gas required by the customers. Future
adjustment of the preset calibration can be carried out by employing the calibration keypad.
Testing should be carried out by using a gas mixture in the appropriate range, along with our
calibration kit.
The green DL1 LED on the electronic board flashes to indicate detector status as illustrated in
the table below.
LED DL1 (green) shows the detector's operative status (mS= milliseconds)
Warm-Up
Flashing 750 mS ON; 250 mS OFF
Fault low
Lit fixed
Allarm 1
Flashing 250 mS ON; 1750 mS OFF
Allarm 2
Flashing 250 mS ON; 250 mS OFF; 250 mS ON; 1250 mS OFF
Allarm 3
Flashing 250 mS ON; 250 mS OFF; 250 mS ON; 250 mS OFF
250 mS ON; 750 mS OFF
Fault high
Flashing 250 mS ON; 250 mS OFF
Normal status
Flashing 1 sec. ON; 1 sec. OFF
2.7)
Handheld calibration keypad ST.S/CKD PK
Smart P gas detectors offer a field adjustment for the Zero, Span (response to gas) and the
serial address (for the RS485 bus).
By operating with the handheld calibration keypad, pressing ENTER, ESC, Arrow UP and Arrow
DOWN, the Zero, Span and serial Address shall be accomplished.
The keypad can be connected when the detector is powered ON and operating. Before opening
the detector enclosure, be sure all safety precautions have been considered.
Insert the female connector of the keypad at the edge of the flat cable into the male connector
on the Smart P main board.
Once connected, the keypad will display the gas concentration being measured.
