Masoneilan Model 4411 Electropneumatic Transducer Instruction Manual | 2
Copyright 2020 Baker Hughes Company. All rights reserved.
Brief User Guide
This is a quick guide to connecting the instrument for the conven-
ience of personnel who are familiar with this type of product.
More comprehensive instructions are contained later in this
manual:
1. Connect a clean air supply of about 2.0 bar (30 psig for the
3-15 psig output model, or 2.4 bar (35 psig) for the 6-30 psig
output model) to the IN port (1/4" NPT).
2. Connect a pressure gauge or actuator to the OUT port.
DO NOT use PTFE tape or similar to seal the
ports. Use a minimum of soft setting anaerobic
compound, e.g. Loctite Hydraulic Seal 542.
3. Unscrew the lid to obtain access to the terminals.
The cable will need to be sealed by an approved
gland for explosion-proof installation.
The second un-used conduit entry must be
sealed with an explosion-proof blanking plug.
4. Connect a 4-20mA current source, either through the Jack-
Plug source or Terminal connections. Ensure that it can
supply at least 6.5V at 20mA. Check for correct polarity.
DO NOT use a voltage source; it will irreversibly dam-
age the converter.
5. Switch on the air supply and current source and allow a
few seconds stabilisation time. Adjust span and zero via the
trimpots if necessary.
If the instrument fails to operate refer to the Simple Functional
Checks�
General Description
These converters are precision electronic pressure controllers
designed for continuous process control applications. The units
operate a closed loop system incorporating a feedback sensor
ensuring long-term stability and high accuracy performance, with
‘fail-safe’ operation, i.e. the output falls to a low pressure upon
failure of the loop current.
These instruments combine substantial flow capacity, with the
ability to give precise control into closed volume ‘dead end’
applications�
The instrument has been designed to withstand the rigours of
industrial environments; such as shock, vibration and positional
effects. As with any other precision instrument dropping the
unit onto a hard surface may result in shifts in calibration or
possibly permanent damage. The unit may be mounted directly
upon a control valve. A mounting bracket is provided for surface
mounting, or the instrument may be fixed directly to rigid
pipework.
The electronics are enclosed within a watertight housing, which
is suitable for outdoor use if a suitable cable gland is used. The
lid should be firmly tightened, the use of a tool for this purpose is
not recommended�
Figure 1
JACK SOCKET: TO CALIBRATE UNIT ON
INSTALLATION USING A 4-20MA INPUT
SIGNAL. WHEN USING JACK PLUG A SIGNAL
DOES NOT HAVE TO BE SUPPLIED VIA THE
TERMINAL BLOCK. THE INPUT SIGNAL CAN
BE MONITORED THROUGH THE JACK PLUG
SOCKET WHEN UNIT IS IN OPERATION.
1/2"NPT or M20
Conduit Entry
3.5mm Jack Socket
Alternative Power
Supply & Monitor
Span
Zero
Tight Shut Off
4-20mA Input Terminals
1/2"NPT or M20
Conduit Entry
Lid Locking
External Earth
1/8" Gauge Port
External Earth
Air Filter;
DO NOT REMOVE WHEN PRESSURIZED.
DO NOT USE WITH FILTER REMOVED.
Air Filter. BS2000 with 98% efficiency
@ 2µM with water and oil absorption.
Internal Earth
