Copyright 2022 Baker Hughes Company.
14 | DPI 610E Instruction Manual–English
Chapter 1. Overview
1.6.5 Pressure Warnings
Note:
Maximum Operating Pressure (MWP) is stated on the label on the underside of the
instrument. Over pressure should be limited to 1.5 × MWP (MWP is based on unit pressure
range).
1.6.6 Overvoltage Categories
The following summary of installation and measurement overvoltage categories is derived from
IEC610101. The overvoltage categories indicate the severity of overvoltage transients.
INFORMATION
The instrument contains an internal over-pressure vent
mechanism to protect the internal pressure sensor and pump mechanism from
damage.
WARNING
Always wear appropriate eye protection when working with
pressure.
To prevent a dangerous release of pressure, make sure that all the related pipes,
hoses and other accessories have the correct pressure rating, are safe to use
and are correctly attached. Isolate and bleed the system before you disconnect
a pressure connection.
It is dangerous to attach an external source of pressure to the instrument. Use
only the internal mechanisms to set and control pressure in the pressure station.
Table 1-3: Overvoltage Categories
Category
Description
CAT I
This is the least severe overvoltage
transient. CAT I equipment cannot be
directly connected to the mains power.
E.g a process loop powered device.
CAT II
This is for single phase electrical
installation. E.g appliances and portable
tools.
