Start-Up; Switch On Supply Voltage - Dräger PEX 3000 Instrucciones Para El Servicio

Start-up

Start-up
Remove cover of the transmitter's enclosure.
Attention:
Dust explosion protection is not ensured after having opened the transmitter's
enclosure! The Ex area has to be temporary de-classified if necessary.

Switch on supply voltage

— After having switched on the transmitter all the LED segments including both the
decimal points are activated for approx. 5 seconds to make sure that they are not
faulty. During this internal test routines start running, the transmitter's output si-
gnal is 1 mA.
— After this the display shows two horizontal lines and the currently measured gas
concentration alternately, changing with approx. 1 Hz. During this the transmit-
ter's output is 3.4 mA.
— After one minute the transmitter is ready.
If the reading is not lower than 5% of the full scale deflection, the actual measured
value is displayed constantly, and the output signal is proportional to the reading.
Type XTR 0090 or XTR 0091 in connection with the sensing head SE Ex LC M:
Adjust sensor current by means of the function "CU – Sensor Current Adjusment"
(see page 15) to 276 mA.
Transmitter should be operated at least 10 minutes (warm-up time of the sensor)
before calibration.
Page 16 of 42
9023810 - 2nd edition - September 2005