Dynisco MDT 420 User manual

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MDA / LDA / TDA Series
Pressure transducers for high temperatures and high
pressures
Operang Manual

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Table of Contents
Content Chapter Page Icon
General
Notes on safety
Technical data
Funcon
Transport/delivery
Installaon
Commissioning
Maintenance
Accessories
Troubleshoong
- Declaraon
of conformity
1
2
3
4
5
6
7
8
9
10
11
3
5
6
13
14
16
24
26
28
29
30

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1. General
1.1 Important informaon
1.2 Copyright
1.3 Explanaon of icons
1.4 Abbreviaons
1.5 Correct use
1.6 User’s obligaons
1.1 Important information
This manual applies to the MDT 420/460/435/467 and PT 420/460, TDA 432/463 and
LDA 415 series only. It must be kept near the equipment in a readily and immediately
accessible locaon at all mes.
The content of this manual must be read, understood and
followed in all points by all relevant people. This applies in parcular to the notes on
safety. Following the safety instrucons will help to prevent accidents, defects and
malfuncons.
DYNISCO will not be held liable for any injury, loss or damage resulng from failure to
follow the instrucons in this manual.
If malfuncons occur in spite of having followed the operang instrucons, please
contact the DYNISCO customer service department (see chapter 8,
Maintenance).
This applies in parcular during the warranty period.

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1.2 Copyright
Copyright law requires that this manual be used for inhouse purposes only.
All reproducon, even parally and for in-house purposes, requires the approval of
DYNISCO. This manual may not be forwarded to third pares.
1.3 Explanation of icons
The manual uses icons to indicate informaon pertaining to safety:
Risk of destrucon or damage to equipment, machines or installaons
General danger to life or limb
Specic danger to life or limb
You MUST do this
The safety instrucons are provided again in the individual chapters of the manual.
1.4 Abbreviations
The following abbreviaons are used:
OM Operang manual
PT pressure transmier
f.s. of full scale

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1.5 Correct use
The purpose of the pressure transducer is to measure pressure in plasc melt as part
of a larger overall system. The PT can be used in media temperatures up to 400°C.
If the PT is used in other applicaons, the safety and accident prevenon regulaons
specic to that applicaon must be followed.
When using the PT as a safety component in accordance with the EC Machine
Direcve, Annex IIc, the equipment manufacturer must take any necessary
precauons to ensure that malfuncons of the PT cannot cause damage or injury.
1.6 User’s obligations
The operator or owner of the larger overall system, e.g. a machine, is responsible for
following the safety and accident prevenon regulaons that apply to the specic
applicaon.
2. Notes on safety
The operator or owner of the larger overall system is responsible for
following the safety and accident prevenon regulaons that apply
to the specic applicaon.
Toxic hazard!
The PT contains a small amount (7 mm³) of mercury (Hg) as its transmis-
sion medium. If the diaphragm is damaged, mercury may escape.
Never transport or store the PT without the protecve shell bolted in
place. Remove the shell shortly before installaon.
If mercury is inhaled or swallowed, seek medical aenon immediately!
Mercury is hazardous waste and must be disposed of in accordance with
applicable laws. DYNISCO will accept defecve PTs. If mercury escapes,
use airght packaging!

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When planning machinery and using the PT, follow the safety and
accident prevenon regulaons that apply to your applicaon,
e.g.:
● EN 60204, Electrical equipment in
machines.
● EN 292, Machine safety, general design
guidelines.
● DIN 57 100 Part 410, Protecon against
electric shock.
Mounng and electrical connecon of the PT must be done by specialists
with EMC training, following all applicable regulaons, and in
pressureless, voltage-free condion with the machine switched o.
The machine must be secured against being switched back on!
Burn hazard!
The PT must be removed with the melt in molten condion. The PT can
be very hot when removed.
Wear protecve gloves!
3. Technical Data
3.1 Ordering guide
3.2 Ordering example
3.3 Performance characteriscs
3.3.1 Accuracy
3.3.2 Repeatability
3.3.3 Resoluon
3.4 Mechanical conguraons
3.5 Pressure side connecon

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3.6 Pressure ranges
3.6.1 Pressure ranges in bar
3.6.2 Max. Overload
3.6.3 Burst pressure
3.6.4 Limit frequency
3.7 Rigid stem/exible stem
3.8 Electrical Data
3.9 Temperature inuence
3.10 EMC requirements
3.11 Materials
3.12 Mounng torque
3.13 Environmental Protecon
3.14 Weight
3.15 Dimensions
3.1 Ordering guide
3.2 Ordering example
xDT4xx x- xx - xxx - x - Opon
Rigid stem/exible stem
Pressure range
Pressure side connecon
Amplier
Perf. characteriscs
Mechanical conguraon
The exact meanings of the leer/digit combinaons are given in the corresponding
secons of chapter 3.
MDT462 F - ½ - 5C - 15/46
Melt PT
Perf. char. ± 1,0 % full scale
Amplier: 2-wire 4-20mA
Thread: ½ = ½" - 20 UNF
Pressure range: 0 - 500 bar
Stem length:15 = 152 mm
Flex. stem:46 = 457 mm

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3.3 Performance characteristics (xDT4Xx x-xx-xxx-xx)
3.3.1 Accuracy
(Linearity and hysteresis at T = constant)
xDT42x x ± 0,5 % of full scale
(35 bar and 50 bar ± 1 % of full scale)
xDT46x x ± 1 % of full scale
3.3.2 Repeatability
xDT42x x ± 0,1 % of full scale
(35 bar and 50 bar ± 0,2 % of full scale)
xDT46x x ± 0,2 % of full scale
3.3.3 Resolution innite
3.4 Mechanical configurations (XDT4xX x-xx-xxx-xx)
MDT4x0, LDA 415 stem version
MDT4x2 rigid stem and exible stem
TDT432/463 combined pressure and
temperature measurement
MDT435/467 transducer for limited
installaon space
3.5 Pressure side connection (xDT4xx x-XX-xxx-xx)
½ = ½” 20 UNF 2A
M18 = M18 x 1,5
3.6 Pressure ranges (xDT4xx x-xx-XXX-xx)

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3.6.1 Pressure ranges in bar
Model number Permitted pressure range in bar
xDT4xx x-xx-17-xx 0 - 17 series 42x/43x x only
xDT4xx x-xx-35-xx 0 - 35 series 42x/43x x only
xDT4xx x-xx-50-xx 0 - 50 series 42x/43x x only
xDT4xx x-xx-1C-xx 0 - 100
xDT4xx x-xx-2C-xx 0 - 200
xDT4xx x-xx-3,5C-xx 0 - 350
xDT4xx x-xx-5C-xx 0 - 500
xDT4xx x-xx-7C-xx 0 - 700
xDT4xx x-xx-1M-xx 0 - 1000
xDT4xx x-xx-1,4M-xx 0 - 1400
xDT4xx x-xx-2M-xx 0 - 2000
Other pressure ranges on request
3.6.2 Max. Overload (without influencing operating data)
2 x full scale pressure up to 700 bar (for 1000 bar and 1400 bar range: max. 1750 bar,
and 2450 bar for the 2000 bar range)
3.6.3 Burst pressure 6 x nominal value,
max. 3000 bar
3.6.4 Limit frequency 50 Hz [-3db]
3.7 Rigid stem/flexible stem (xDT4xx x-xx-xxx-XX)
15 = 152 mm standard length for rigid version
15/46 = 152 mm stem length / 457 mm exible stem
Other lengths on request

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3.8 Electrical data (xDT4xx X-xx-xxx-xx)
Conguraon 4-arm Wheatstone bridge
strain gauge with int. amplier
Output signal 3,33 mV/V ± 2 %
Supply voltage 10 VDC (recommended)
min.6 VDC, max.12 VDC
Calibraon funcon 80 % ± 0,5 % of full scale
(room temperature) output by externally connecng contacts E and F
Leakage resistance > 1000 MΩ at 50 V
3.9 Temperature influence
Housing
Max. housing temperature ± 120 °C
Zero shi due to temperature change on the housing
xDA420 series ±0,2% full scale /10°C typ.
xDA460 series ±1,0% full scale /10°C typ.
Sensivity shi due to temperature change on the housing
xDA420 series < 0,1 % f. s. / 10 °C typ.
(35 and 50 bar < 0,2 % f. s. / 10 °C) typ.
xDA460 series < 0,4 % f. s. / 10 °C typ.
Diaphragm (in contact with media)
Maximum temperature at the diaphragm
400 °C
Zero shi due to temperature change on the diaphragm
xDT 420 series <0,2 bar / 10 °C typ.
xDT 460 series < 0,4 bar / 10 °C typ.

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3.10 EMC requirements
Conforming to in accordance with EMC direcve.
Emied interference DIN EN 50081-1
(residenal area)
Immunity DIN EN 50082-2
(industrial area)
3.11 Materials
Diaphragm 15-5PH Mat.No. 1.4545
Armoloy coated
Stem 15-5PH Mat.No. 1.4545
3.12 Mounting torque max. 50 Nm (500 inch-lbs.)
min. 12 Nm (100 inch-lbs.)
3.13 Environmental protection to IEC 529
PT housing IP54 (without connector)
Standard connector
PT06A-10-6S(SR) IP40
Connector PT06W-10-6S IP64
3.14 Weight 0,6 kg
3.15 Dimensions

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4. Function
4.1 Construcon
4.2 Descripon of funcons
4.3 PT series
4.1 Construction
The PTs of series MDT 420 x/460 x are industry standard.
The main advantages are:
- manufactured under ISO 9002
- thermal stability
- resistance to aggressive media
- insensivity to electromagnec radiaon (EMC)
- liquid-lled transmission system (mercury)
- pressure measurements in plasc melt up to a temperature of 400°C (750°F)
- maximum pressure 2000 bar
4.2 Description of functions
Through a closed, liquid-lled pressure transmission system, the PT furnishes
an electrical signal that is proporonal to the pressure of the melt.
The pressure applied by the medium is forwarded to the measuring diaphragm via the
separang diaphragm and the transmission medium (standard conguraon:
mercury) in the capillary. The deecon of the measuring diaphragm changes the
resistance of the strain gauge bonded to the measuring diaphragm. The strain gauge
is a Wheatstone bridge.
An electric signal proporonal to the pressure is generated via the supply voltage.

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Fig. 05: Funconing
principle of the PT
of the MDT 420/460
series
4.3 PT series
The MDA/LDA/TDA series PTs are also
available as PT series. The PT types
correspond to the MDA models, and the
TPT types correspond to the TDA models;
the number codes are idencal. The PT
series diers from the MDA series in that
all specicaons are given in US American
units of measure.
E.g.: 1 bar = 14,5 PSI
(PSI value is rounded)
2,54 cm= 1" (inch)
All other specicaons are the same as in
the MDT series.
5. Transport / delivery
5.1 Transport / packing /
transport damage
5.2 Storage
5.3 Scope of delivery

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Toxic hazard!
The PT contains a very small amount of mercury (Hg) as its
transmission medium. If the diaphragm is damaged, mercury
may escape. Non-toxic NaK is being used in the LDA series. NaK is
also available as an opon for other pressure transducers. Never
transport or store the PT without the protecve shell bolted in
place. Remove the shell shortly before installaon.
If mercury is inhaled or swallowed, seek medical aenon
immediately.
Mercury is hazardous waste and must be disposed of in
accordance with applicable laws. DYNISCO will accept defecve
PTs.
If mercury escapes, use airght packaging!
Alternave, non-toxic transmission media (Oil or NaK) available
on request.
ESD sensive component. Electrostac discharge may damage
the PT. Take ESD precauons.
5.1 Transport/packing/transport damage
- Do not let the PT be damaged by other items during transit.
- Use only the original packaging.
- Report transport damage to DYNISCO immediately in wring.
5.2 Storage
- Store the PT in original packaging only.
- Protect against dust and moisture.
5.3 Scope of delivery
- PT with diaphragm protecon cap
- Cable socket
- Fastening clip (transmier with exible stem only)
- Calibraon sheet
- Operang manual

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6. Installation
6.1 Mounng hole
6.2 Checking the mounng hole
6.3 Mounng the Pressure Transmier
6.4 Mounng PTs with exible stem
6.5 Electrical connecon
6.5.1 EMC / compliant connecon
6.6 Connecon assignments
6.7 Wiring
6.8 Connecon thermocouple /RTD element
Am bient temperature for the electronics housing max.
+120°C. Higher temperatures can result in damage and
malfuncons. Mount the PT only in locaons where
these temperatures are not exceeded.
6.1 Mounting hole
To produce the mounng hole, use only DYNISCO
machining tool kit.
- Drill the mounng hole as shown in gure 06/07.

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Fig. 06: Mounng hole for transmier
MDT 420, 460, 422, 462, 432, 463
Fig. 07: Mounng hole for transmier MDT467 x

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When reworking the mounng hole, pay parcular aenon to the
centricity of:
- the hole,
- the thread and
- the sealing surface.
Pressure sealing takes place on the 45° beveled sealing surface and on the front
cylindrical secon of the PT (see gures 06 and 07).
The sealing surface must be:
- correctly machined
- free from marks and rough edges
- free from solidied plasc residue.
6.2 Checking the mounting hole
- Paint the test bolt DYNISCO on the marked area
(gure 08, item 1) with marking ink up to the
thread.
Fig. 08: test bolt with marking ink
- Insert the test bolt in the mounng hole
- Twist it in by hand unl the two sealing surfaces make contact.
- Remove and examine the test bolt.
The only acceptable abrasion of marking ink is at the sealing edge (45°), evenly (!)
over the enre circumference.
If the ink has been rubbed o in other places too:
- rework the mounng hole.

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6.3 Mounting the Pressure Transmitter
Mounng and electrical connecon of the PT must be
done by specialists with EMC training, following all applicable
regulaons, and in pressureless, voltage-free condion with the
machine switched o.
The machine must be secured against being switched back on!
Toxic hazard!
(Only when using standard models with mercury)
The PT contains a small amount (7 mm³) of mercury (Hg) as its
transmission medium. If the diaphragm is damaged, mercury may
escape.
Never transport or store the PT without the protecve shell bolted
in place. Remove the shell shortly before installaon.
If mercury is inhaled or swallowed, seek medical aenon
immediately!
Alternave, non-toxic transmission media (Oil or NaK) available on
request.
ESD sensive component. Electrostac discharge may damage the
PT. Take ESD precauons.
Before mounng the PT, check the mounng hole carefully. The PT
must only be mounted in holes that sasfy the requirements
spulated in chapter 6.1. A hole that does not sasfy these
requirements can damage the PT.
Before mounng the PT, ensure that the mounng hole is free
from plasc residue. Remove plasc residue with the DYNISCO
cleaning tool kit. A test bolt is included with this cleaning set.
To prevent the PT from scking permanently in the mounng hole,
coat the thread secon of the transmier with high temperature
resistant grease or a suitable parng agent.
- Check the mounng hole with the test bolt, and clean with cleaning set if necessary.
- Coat the thread secon of the transmier with high temperature resistant grease or
a suitable parng agent.

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Always use a spanner applied to the designated hexagon
collar when screwing the PT in and out. Do not apply the
tool to the housing or housing/sensor connecon!
Maximum mounng torque 50 Nm. If the mounng torque is too
high, the PT may be damaged or its zero point may shi.
- screw the PT into the mounng hole and ghten.
6.4 Mounting PTs with flexible stem
Mounng a PT with a exible stem to the pressure sensor is done analogously to the
procedure in 6.3.
Avoid kinking or crushing the exible stem.
Minimum bending radius
- 25 mm for protected capillary
- 2 mm for unprotected capillary
(MDT 435 / 467)
The connector must be easily accessible.
- Mount the electronics housing of the PT with the fastening clip DYNISCO P/N 200982
(included). See mounng example in gure 09.
- Addionally secure the exible stem between the electronics housing with a
standard cable clip.
Fig. 09: Mounng example for Pressure Transmier with exible stem