Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 23)

21
Installation
CAUTION
Do NOT exceed the pressure range of the sensor. This would permanently deform the
sensor membrane, thus delivering incorrect pressure values in the future.
The external sensor connects to the ORBISPHERE measuring equipment with a 1 meter cable
and a 4 pin connector (an optional extension cable can be used, but total length should not
exceed 50 m.).
The external pressure sensor can be installed in the 32002.xxx multi parameter flow chamber. It
is held in place by a blue threaded collar. Tightness is assured by the O-ring on the sensor seat.
4.5.2 Weld-on stainless steel socket
The 29501 weld-on sensor socket can be used to install a sensor into a stainless steel pipe
(min.Ø 50 mm or 2”). When welding the socket to the pipe, check that setback between the
pipe’s inner diameter and the sensor tip does not exceed 4 mm (see diagram).
Note: Be sure to remove the two O-rings from the socket before welding. Leave the sensor’s stainless steel
cap screwed on during welding to prevent thread distortion.
Recommendation:
To facilitate sensor removal and installation, we suggest installing the socket in a location where
the liquid can be drained quickly and easily. By creating a one meter long piece of pipe
(
Figure 8 ) with shut off valves at both ends, just a small volume of liquid needs to be drained to
enable sensor removal.
Also, a precise sensor and socket installation can be performed in the workshop, and this
assembly can be placed in the production line with minimal down time.
Figure 7 Weld-on sensor socket
Figure 8 Installation in-line