Figure 1 shows an example MGP260 probe ball valve installation. The figure highlights
the correct wiring routes and shows the recommended installation depth and orientation. An
external pressure measurement instrument (item 5) is shown as an example of pressure
compensation input options: for a description of alternative options, see Pressure compensation input options.
Figure 1. MGP260 series probe installation example
with wiring routes and recommended orientation and depth
1
External pressure or temperature sensor input wiring (Ex ia): use the M16x1.5
lead-through and route the cable directly to the terminal. Use the strain relief clamp
located on the top side of the component board.
2
Standard analog output, power supply input, and RS-485 communication
wiring: use the M20x1.5 lead-throughs and route the cables to the terminals from below
the component board. Use the strain relief clamp located on the bottom of the component
board.
3
Metal barrier separating the intrinsically safe external sensor input terminals from
the analog output, power supply input, and RS-485 terminals on the component board.
4
1.5" male NPT thread on the probe: never install to any other thread
type than 1.5" female NPT.
5
Example pressure compensation input option: an external measurement instrument
connected to the MGP260 Ex ia input terminals (item 1).
6
For best results, install the probe horizontally and position the tip of
the probe within 1/3 d of the pipe centerline. In smaller pipes, the installation depth
can be adjusted by using an adapter (for example, a ball valve).
CAUTION Always use a separate cable
for the (Ex ia) external pressure or temperature sensor input wiring (1), and make sure the
wiring remains separated from the terminals and wiring (2) on the other side of the metal
barrier (3) on the component board.
CAUTION Make sure the installation valve and threads are
appropriate from the valve specifications. The correct thread type in which to install MGP260
probes is 1.5" female NPT. Installing into any other thread type can damage the
equipment and compromise the leak tightness of the connection. If unsure, verify the thread
type with a 1.5" NPT thread gauge.
CAUTION Note that the pressure
compensation input must be set up in order to receive accurate measurements. For pressure
input options, see Pressure compensation input options.
