Honeywell GasLab Q2 - Checking the Setting and Signals

COMMISSIONING AND DECOMMISSIONING
Information for general use
Rev. M / 73023639
84
GasLab Q2
6.2.1. Checking the setting and signals
Adjustment of the gas flow is only necessary if you want to use the bypass or if the right LED of the
device flashes red.
When using the bypass, its flow rate must be adjusted to the conditions of the installation. This can
be done with the left needle valve, which you only open and lock for this purpose. The valve spindle
is provided with a lock nut for this purpose.
If the right LED flashes after the commissioning steps or the setting of the bypass, it is possible that
the internal pressure is not enough for the measurement. In this case, first try to increase the
pressure of the process gas to 0.2 MPa ≙ 2 barg ≙ 29.01psig overpressure.
If this is not possible or if the pressure is already higher, carefully turn the right needle valve until
the LED lights up permanently. The valve spindle is secured with a lock nut, which must first be
loosened and tightened again after adjustment.
The needle valve on the right-hand side of the device (see Figure 4.2) is for regulation
only, it is not a shut-off valve and must never be fully closed. La vanne à aiguille située
sur le côté droit de l’appareil (voir fig. 4.2) sert uniquement à la régulation, il ne s’agit pas
d’un robinet d’arrêt et elle ne doit jamais être complètement fermée!
A complete check of the current parameter set can be made using the enSuite configuration and
analysis software with an online connection to the GasLab Q2. See also section 8.4.3 Changing the
device parameter set in the connected device (online parameterization).
Parameterized output signals can be measured using suitable measuring equipment. The digital
communication (Modbus, etc.) can be checked using suitable tools (for example, a protocol
analyzer).
Preferably use the cable ends outside the instrument for the measurement.
Only open the device with the permission and agreement of the system operator.
Observe the explosion protection and safety regulations!