GEORGIN P Series User manual

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USER MANUAL
PRESSURE SWITCHES
AND TEMPERATURE SWITCHES
P Series

User Manual - P series
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I. Introduction 3
1. Purpose 3
2. Operating principle 3
3. Pressure Equipment Directive (PED) 3
4. QualiedequipmentinaccordancewithRCC-E 4
5. General information concerning functions 4
II. Before installation 5
1. Storage 5
2. Before installation 5
III. DOs and DON'Ts 6
1. GeneralRecommendations 6
2. Special recommendations 7
3. Prohibitedactions 8
4. Advice 8
IV. Commissioning 9
1. Mountingthehousing 9
2. Mounting 10
V. Adjustment 12
1. Selection guide 12
2. Equipment required 13
3. Pre-adjustmentoperations(for any type of adjustment) 13
4. TypeAadjustment:xeddeadbandinstrument 14
4.1. Procedure A1: Single inStrument 14
4.2. Procedure A2: diAPhrAgm-ActuAted differentiAl inStrument 15
4.3. Procedure A3: BellowS-ActuAted differentiAl inStrument 15
5. TypeBadjustment:adjustabledeadbandinstrument 16
5.1. Procedure B1: Single inStrument 16
5.2. Procedure B2: diAPhrAgm-ActuAted differentiAl inStrument 17
5.3. Procedure B3: BellowS-ActuAted differentiAl inStrument 17
6. TypeCadjustment:electricaloperationinstrumentwithtwooffsetswitches18
6.1. Procedure c1 : Single inStrument 18
6.2. Procedure c2: diAPhrAgm-ActuAted differentiAl inStrument 19
6.3. Procedure c3: BellowS-ActuAted differentiAl inStrument 19
VI. Wiring 20
1. Theelectricalswitch 20
2. Cableinlets 20
3. Internalterminalblocks 20
4. Breakingcapacity(resistivecircuits) 21
5. Thepneumaticswitch 21
VII. Maintenance 22
1. Inspection frequency 22
2. Precautionstotakeduringmaintenance 23

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I. Introduction
You have just acquired a GEORGIN instrument that has undergone extensive testing and several quality
checks to ensure your complete satisfaction.
Appropriate specication, according to your process, and compliance with the instructions in this manual will
ensure an optimum working life for your instrument.
1. Purpose
P Series instruments are intended for process monitoring.
This manual gives the assembly and conguration instructions to be applied for optimum operation of your
instrument. You must read and obey these instructions when installing your instrument.
!
Never tamper with components of the instrument that are immobilised with red varnish.
Any damage caused by a failure to obey these instructions will invalidate the manufacturer's
guarantee.
2. Operating principle
VG:
RG:
IG:
IE :
RE:
VE:
ES:
LP:
LE:
C:
Range adjustment screw
Range spring
Range index
Dead band and oset index
Dead band adjustment and oset spring
Dead band adjustment and oset screw
Sensing element
Flexible arm
Dead band arm
Switch
The pressure or temperature is applied to the sensing element (ES), whose position then changes, acting on
the exible arm (LP). The force produced in this way is balanced by the spring (RG). This is how the set point is
adjusted. As the set point is approached, the change in forces disturbs the balance and acts on the contact.
A second spring (RE) acting on the end of the exible arm (LP) increases the deviation of the switch(es). The
force produced by the dead band spring is adjustable, and is used to oset the two contacts in the case of
dierential functions.
NOTE: The pressure switch and temperature switch scales indicated in our catalogue are values for a set point
to lower the pressure or temperature.
3. Pressure Equipment Directive (PED)
Series P pressure and temperature switches satisfy the requirements set forth in Appendix I of PED 2014/68/EU. They
are classied in Category IV as a safety accessory, and can be incorporated in a safety loop. Refer to our declaration of
compliance for the models concerned and conditions of use.

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4. QualiedequipmentinaccordancewithRCC-E
The pressure switches and temperature switches of the P series meet the design and construction rules for electrical
equipment of nuclear plants.
Refer to the equipment identication sheet (according to the last index NTP N 100 – consult us) for a denition,
installation rules and recommendations for maintenance of the equipment in accordance with the associated quality
and general requirements.
5. General information concerning functions
The instruments may be equipped with electrical or pneumatic functions.
5.1. Electrical functions
Note:
The dead band values given in our catalogues are indicative values recorded in a laboratory, measured
between the maximum and minimum settings. If the instrument is used outside its operating limits, the set
point(s) and dead band values may be aected.
The electrical operation of the instrument diers according to the type of microswitch used. Many dierent
versions are on oer (gilt, tropicalised, nitrogen sealed, etc.).
5.1.1. Single xed dead band electrical operation:
Microswitch“only“. Each type of microswitch has its own characteristics, as indicated in the catalogue.
Models: 4, 4D, 10, 10D, 16, 16D, 8, 98, 60, 60C, ...
5.1.2. Single adjustable dead band electrical operation:
Microswitch combined with a spring (RE) to increase the microswitch dead band value in a given range
(refer to the dead band table in the catalogue)
The trigger value of the upper threshold can be oset using the RE.
This action has no eect on the lower threshold.
Models: 6, 6V, 96, 62, 62C, ...
5.1.3. Electrical operation with two simultaneous contacts:
Combination of two single functions set to act at the same time, either upwards or downwards. The dead band of a
simultaneous function is greater than that of a single function. When rolling out from the factory, the simultaneity is
wedged to the decrease of pressure / temperature.
Fixed dead band models: 44, 30, 36, 38, 108, 160, 160C, ...
Adjustable dead band models: 34, 34V, 106, 162, 162C, ...
5.1.4. Electrical operation with two oset contacts:
Combination of two single functions adjusted to act with a gap between. The spring (RE) is used to adjust the gap
between the interlocking of the switches.
Models: 46, 54, 54V, 50, 56, 116, 118, 172, 172C, 170, 170C, ...
5.1.5. Electrical operation with manual reset:
Once triggered, the switch returns to its initial position only if you press the button located on the side of the housing,
and only if the pressure or temperature has dropped (type 18 max. cut-o device) or climbed
(type 20 min. cut-o device) beyond the set point.

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!
For temperature switches, the minimum dead bands given in our manuals are recorded under ideal
test conditions. The sensing element experiences the temperature variations of the installation without
delay and in its bulk. In operation, these dead bands can be dierent in view of the exchange conditions:
rate of temperature change, specic heat, radiation, inertia of the measuring instrument compared to
inertia of temperature switch, presence of a sleeve or immersion sleeve, etc.
5.2. Pneumatic functions
The instruments can be equipped with a Normally Open (NO) or Normally Closed (NC) pneumatic function using a
poppet or spool valve.
The supply ttings are M5, 1/4, or 1/8 gas threaded according to the type of function or the model.
According to the type of cell, the control pressure will be:
-As standard: 1.5 to 8 bar (poppet design <> with a residual leak).
-On request: 0 to 10 bar (spool design <> without leak).
The control uid must be compatible with the ISO-VG10 standard (air, nitrogen, etc.).
Maximum allowable ltration 5 µm.
The standard materials for the cell body are polyamide, brass, and/or aluminium. The seals are made of NBR
(other types on request).
II. Before installation
1. Storage
The pressure switch or temperature switch must be stored in a sheltered location, in its original packaging.
The storage temperature must be between:
-40 and +70°C for bellows instruments
-20 and +70°C for diaphragm pressure switches
-40 and +55°C for temperature switches from the C, G and M ranges
They must not be stacked to reach a load greater than 10 kg.
2. Before installation
Allow the instrument to return to ambient operating temperature before installing it.
Whilst removing the packaging, check the equipment and all accessories.
The housing must be examined to check the following points:
Check that the paint has not been damaged.
Check that there are no signs of deformation or impact on the housing.
For instruments equipped with an immobilising bolt for transport (located in the instrument's process tting),
remove this item.
!For ML/DMLinstruments:
1. Loosen the locknut and the immobilizing bolt inserted in the tting.
2. Connect the instrument to a pressure bench on the HP side, and apply a pressure of 150 mbar. Return to
atmospheric pressure, and disconnect the instrument from the bench.
3. Rest the instrument for 24 hours before calibrating.
Before installation check again that the materials in contact are compatible with the process to be monitored.
If necessary, protect the instrument with a safety device that is appropriate to the application (pressure limiter,
shock absorber, thermowell).

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III. DOs and DON'Ts
1. GeneralRecommendations
1.1. Operating temperature limits (pressure sensing element)
Bronze bellows: -20 to +60°C
Stainless steel bellows: -20 to +150°C
Stainless steel tube: -20 to +150°C
NBR diaphragm: -20 to +100°C
EP diaphragm: -40 to +120°C
FKM diaphragm: 0 to +150°C
/!\ For temperature switches, refer to the range tables. /!\
1.2. Ambientoperatingtemperaturelimits(housing)
-20 to 70°C (except temperature switches from the C, G and M ranges: max.55°C) - others on request.
1.3. Radiantheat
Avoid installing the instrument near (radiant) heat sources. Observe the ambient operating temperature limit.
1.4. Pulsations
A suitable shock mount or exible piping connection must be provided to protect bellows instruments in case of
vibrations or process instability (possible use of PA-type pressure switches).
1.5. Steam
A siphon must be placed upstream from the pressure switches on a steam circuit to limit the temperature
at the sensor.
1.6. Condensation
Protect from excessive sunlight to limit the eects of night-time condensation.The installation location must be chosen
very carefully in seaside locations or damp environments.
1.7. Vibrations
Georgin recommend avoid mounting the instrument directly on vibrating equipment.
Otherwise, an eective anti-vibration system, fully suitable for installation (assembly type, process connection,
electrical connection, ...) and its environment, must be chosen.Flexible piping connections and silent blocks may
sometimes be necessary.
The eectiveness of this mounting must be checked after installation.

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1.8. Mountingthehousing (see Chapter IV.1)
Georgin recommends mounting the housing in accordance with the following rules:
a. For bellows or Bourdon tube pressure switches and temperature switches:
The orientation of the housing has little eect on the operation of the instrument, but an upright (vertical)
position is nevertheless recommended (with adjustment screw facing upwards). This prevents premature wear
and preserves the measurement characteristics.
b. For diaphragm pressure switches:
Diaphragm instruments (except PA type) MUST be mounted vertically (with adjustment screw facing upwards),
with the diaphragm horizontal, on an appropriate mount.
Because of the weight and/or the shape of the sensing element, the housing of these instruments must NEVER
be used as a mount.
1.9. Installation (see Section IV.2)
The instruments are mounted according to type. Refer to the specic dimensional drawings.
For pressure switches, if the pressure connection uses a rigid tube, ensure that this tube is aligned with the axis
of the tting so that the housing, and the measuring element in particular, are not subject to any mechanical
loads that could deform them or shift the threshold.
2. Special recommendations
2.1. ATEX devices
For ATEX devices, it is ESSENTIAL to refer to the “ATEX Instruction Manual“ supplied with the equipment and available
on www.georgin.com.
2.2. Low-andmedium-pressureinstruments
Diaphragm-actuated instruments (except PA type) must be installed with the diaphragm horizontal and secured to a
special mount.
Ask us for further information.
2.3. Differentialpressureswitches
To ensure that the contact(s) will change state, the pressure in the HP chamber must be greater than that in the LP
chamber. This dierence must be greater than the sum of dierential pressure (∆P) + microswitch dead band
HP – LP > ∆P + e
Type Scale ∆P Adjustable dead band ≤ Max.
dead
band ≥
Max. P
static
1x SPDT 2x SPDT
96 106
bar bar bar bar bar
B H B H Min / Max
DPB.QX11 0.5 to 1.5 1.2 1.8 2 2.5 / 33
Example: For a DPB.QX11 in function 96, the pressure in the HP chamber must be greater than the pressure in
the LP chamber by at least:
P. HP – P. BP > 0.5 + 1.2 bar
P. HP – P. BP > 1.7 bar

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2.4. Bourdontubeinstruments(PL/PLB sensors)
When the instrument is mounted on rigid ttings, ensure that the mount does not apply any residual loads to the
process connector.
2.5. Temperatureswitches
Any dierence in level between the housing and the probe must be taken into account. Where necessary, to inhibit the
eect of the height of the liquid column, the calibration values may need to be corrected (for more information, ask us).
3. Prohibitedactions
3.1. Integrityofthehousing
To avoid compromising the mechanical properties of the enclosure and invalidating its qualication level, no drilling or
machining must be performed on these measuring instruments.
Gas throttling surfaces (seal planes) are kept clean, lightly lubricated (e.g. silicone grease) and free of dents
orscratches.
Add-on seals and paint are strictly prohibited.
4. Advice
4.1. Temperatureswitches
4.1.1.Devices equipped with an immersion sleeve
For bulbs implanted in immersion sleeves (except perforated immersion sleeves) for gaseous uid applications,
a thermal bridge must be created between the bulb and the immersion sleeve using a ller liquid (oil) or a heat-
conducting paste.
/!\ Caution: Ensure that the quantity of liquid or paste is not excessive, to avoid compressing the bulb, but is
sucient to cover it completely. /!\
4.1.2.Orientation of the probe
ESSENTIAL: Thermostatic probes must be installed facing down, with the
capillary outlet at the top.
The measurement probe must not be placed in a horizontal position.*
Our temperature switches consist of two main components: probe and
housing, which might or might not be connected by a capillary.
The position of the probe can aect the operation of the temperature
switch. This type of probe is intended for vertical use, and is placed lower
than the housing.
Any deviation from these conditions can aect the response time and
operation of the device.
Our temperature switches are built with a lling that allows the probe to be tilted 45° without aecting their
operation. Beyond that, their operation depends on the value of the measured temperature compared to the
ambient temperature.

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Recommended area:
±45° either side of the vertical axis, bulb down (capillary output up).
Area to be avoided:
from 45° to 75°, the operation of the sensor depends on the measured
temperature value (Ts) and the ambient temperature (Ta):
Ta > Ts: operation is not aected,
Ta < Ts: operation might be aected,
Ta = Ts: operation is aected.
*Prohibited area
Beyond 75°, the operation of the sensor can be signicantly aected.
This is dicult to predict and depends on several physical parameters.
Technical solutions are possible on request (ask us).
IV. Commissioning
1. Mountingthehousing
1.1. Bellows,Bourdontube,andPAdiaphragmpressureswitches,andtemperatureswitches
¾The wall mount must be installed using two Ø 5 mm screws, Class 8.8
¾The housing must be secured to its mount and immobilised with screw V (2.5 N∙m)
¾The cover must be closed using the two captive screws (1.2 Nm).
Dimensions in mm.
V: mounting screw
1.2. Diaphragmpressureswitches(except PA type)
These instruments are supplied without a wall mounting plate. Use the following mounting methods:
(D)ML(B): Use the four spacers provided around the edge of the sensing element.
(D)MABV - DMKBV: Use the two M10 threads provided under the sensing element.
(D)MJBV - (D)MPB: Use the two M6 threads provided under the sensing element.
We also provide special mounting brackets for the purpose. Ask Georgin for further information.

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2. Mounting
!
Avoid mounting on a vibrating wall. This may result in a premature electrical malfunction.
It is especially when approaching the changeover thresholds that our devices are particularly sensitive to
certain vibration frequencies.
If no other mounting is possible, we recommend the use of elastic suspensions for any use on a vibrating
wall, especially in the case of a slow evolution of the pressure or temperature.
2.1. Pressureswitchmounting
The instruments are equipped with a 1/2’’GM or 1/4’’GF (to ISO 228-1) tting as standard.
Other ttings on request (NPT connection to ASA B2-1).
Optional connection by soldered tab (see fc-a3500-fren).
To make the connections, use the appropriate spanners for the ttings, and never use the housing to tighten.
Recommended tightening torque for the pressure tting: 50 N∙m for the 1/2’’ GM.
Check that the pressure inlet tubes are not applying any mechanical load to the tting and the housing.
Observe the environmental and uid-related conditions corresponding to the characteristics of the instruments.
Provide tubing or a capillary to avoid any overheating through conduction.
Never exceed the maximum pressure of the instrument indicated on the label on the side of the housing.
2.1.1.Monitoring liquid pressure :
The pressure switch must be installed under the pressure ttings.
The pipework must be installed in a way that prevents any accumulation of gas in the pressure switch.
The installation of a gas collection tank is recommended.
The pipes connecting the process to the pressure switch must have a descending slope of at least 1/10 to
prevent gas accumulation.
2.1.2.Monitoring gas pressure :
The pressure switch must be installed above the pipes to prevent condensation in the connection pipes and the
pressure switch measurement chambers.
If the gas temperature is high, a cooler or a siphon may be used.
The pipes connecting the process to the pressure switch must have a rising slope of at least 1/10 to prevent
the accumulation of liquid or condensates.
2.1.3.Monitoring the vapour pressure :
The pressure switch may be installed laterally or under the pressure ttings.
A condensate vessel must be installed between the pressure switch and the pressure tting.
The pipe or pigtail siphon (see fc-a3000-fren) connecting the condensate vessel to the pressure switch must be
lled with water beforehand.
A bleeder valve must be installed.
Lateral installation Installation under the pressure tting