Cosa-xentaur Xentaur XDTL-HT Manuel d'utilisateur télécharger pdf (Page 15)

Installation

Wiring Relay Contacts

Standard XTDL-HT™ has one mechanical relay for user

control. Two more relays are available when optional

I/O board is installed. Depending on the ordered

option, the instrument can be installed with:

 Mechanical relays (250VAC, 10A max. rating)

 Solid state relays (240VAC, 5A max. rating)

 Class I Division 2 relays (250VAC, 6A max. rating)

Use wiring appropriate for the voltage and current that

will be switched by the relays. Wires to the relays

should be fed through one of the cable grips (third

cable grip is recommended). For relay 1, connect the

wires to the DIN-mounted terminal blocks marked 7

and 8. Refer to Relays chapter for setup information.

Startup

The instrument air pressure should be set at 60-70 psi on both regulators to

allow sufficient pulling force to the eductors. The sample pressure should be

held at a fixed value in order to maintain the measurement accuracy. This is

accomplished by setting the back pressure regulator inside the enclosure. Any

value in the operating range can be used as the instrument has pressure

compensation on measurement. 1-2 psi below atmospheric pressure is

recommended. To set the pressure:

1. Set the 3-way valve to

process gas.

2. Set the back pressure

regulator until the sample

pressure is at the desired

setpoint.

Close the enclosure door after

the pressure is set. It will take

about 1 ½ hours to reach the

desired internal temperature

depending on the ambient

environment. Measurement

reading may fluctuate until

then. Monitor the sample

temperature for stability if

Relay cable installation

3-way valve

Back pressure regulator

Lift and Turn knob to

set regulator pressure

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Cosa-xentaur Xentaur XDTL-HT Manuel d'utilisateur Page 15