SICK GM35

82
8009389/YN39/V3-0/2015-08| SICKOPERATING INSTRUCTIONS|GM35
Subject to change without notice
START-UP
7.5 Adjustment work
7.5.1 Prerequisites and location selection for adjustment work
The GM35 must always be adjusted in an atmosphere free from sample gas and dust, i.e.
before being installed. The only exception to this are newly assembled installation
environments that have not been put into operation yet, whereby it can be ensured that the
sample gas duct remains flooded with ambient air free from sample gas and dust while the
work described below is being carried out. In this case, a flange with tube already mounted
on the sample gas duct (which has not been used yet) can serve as a bracket during
adjustments, whereby the prerequisites in the following apply for an adjustment at the
measuring point.
Note Adjustment or calibration with test gases using a GPP measuring probe is a special case;
see page 119.
Otherwise, the following options are available:
Adjustment at the measuring point
The following requirements must be fulfilled:
– Dry ambient atmosphere free from sample gas and dust
– The power supply for the GM35 measuring system is already installed and available
– Suitable bracket, to which the measuring probe with attached SR-unit can be secured
horizontally outside the sample gas duct. Sufficient ground clearance must be provided
on the underside of the SR-unit for the plug-in connectors.
If the angle flange cannot be used on the duct-side flange for safety or space (duct
insulation) reasons, it can be screwed or welded into position at a different fixing point
within range of the connection cables.
If the cable length is adequate and sufficient space is available, the SR-unit can also be
adjusted on the ground at the measuring point (see following Section).
Adjustment at a separate location
Alternatively, adjustment can be carried out at a different location away from the
measuring point, whereby the same basic requirements apply.
Adjustment can be carried out using a stable bracket together with the angle flange, or also
on the ground. The SR-unit can either be placed on the left side of the enclosure with the
measuring probe fitted (so that the right side with the visor points upwards), or, if the
SR-unit is arranged vertically, a secure support can be used to ensure the necessary
ground clearance for cable connections.
WARNING: Health risks during the installation of the angle flange
The following risks can occur on the duct-side flange with tube during
installation of the angle flange:
● Burns through
– escaping, hot or aggressive sample gases
–hot components
● Injuries of the skin and respiratory system due to toxic gases in the
measuring duct.
● Injuries due to overpressure in the sample gas duct.
▸ If necessary, use suitable protective equipment or a different bracket.
▸ Observe the detailed safety instructions,
see “Installing the GM35 SR-unit
and measuring probe on the duct”, page 89
.