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Technical Information TI047D/06/en 50096459

Electromagnetic Flow Measuring System PROline promag 50/53 P
Flow rate measurement in chemical or process applications

Features and benefits Nominal diameters DN 15...600 PFA or PTFE lining PFA for high temperature applications up to +180°C Fitting lengths to DVGW and ISO High accuracy: – Promag 50: ± 0.5% (option: ± 0.2%) – Promag 53: ± 0.2% Robust field housing, IP 67 IP 67 wall-mount housing for straightforward installation of the remote version Promag 53 with Touch Control: Operation without opening the housing also for Ex-rated applications Additionalsoftware packages: – pulsating flow – for batching applications – with the electrode cleaning Interfaces for integration into all major process-control systems: – HART interface as standard – Promag 50: PROFIBUS-PA – Promag 53: PROFIBUS-PA/-DP, FOUNDATION Fieldbus

“Quick Setup” menus for straightforward commissioning in the field Ex approval for installation in Zone 1 (ATEX, FM, CSA, etc.) Application All fluids with a minimum conductivity of ≥ 5 S/cm can be measured: acids and caustic solutions paints, lacquers pastes, mashes water, wastewater etc. A minimum conductivity of ≥ 20 S/cm is required for measuring demineralized water. Liner specific applications: PTFE lining for standard applications in chemical and process industries. PFA lining for all applications in chemical and process industries; especially for high process temperatures and applications with temperature shocks.

PROline Promag 50/53 P

Function and system design
Measuring principle Faraday’s law of induction states that a voltage is induced in a conductor moving in a magnetic field. In electromagnetic measuring, the flowing medium corresponds to the moving conductor. The induced voltage is proportional to the flow velocity and is detected by two measuring electrodes and transmitted to the amplifier. Flow volume is computed on the basis of the pipe's diameter. The constant magnetic field is generated by a switched direct current of alternating polarity.

Ue = B L v Q=Av Ue = induced voltage B = magnetic induction (magnetic field) L = electrode gap v = flow velocity Q = volume flow A = pipe cross-section I = current strength

Measuring system

The measuring system consists of a transmitter and a sensor. Two versions are available: Compact version: transmitter and sensor form a single mechanical unit. Remote version: transmitter and sensor are installed separately. Transmitter: Promag 50 (user interface with push buttons for operation, two-line display) Promag 53 (“Touch Control” without opening the housing, four-line display) Sensor: Promag P (DN 15…600)

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PROline Promag 50/53 P

Input
Measured variable Measuring range Operable flow range Input signal Flow rate (proportional to induced voltage) Typically v = 0.01...10 m/s with the specified measuring accuracy Over 1000 : 1 Status input (auxiliary input): U = 3…30 V DC, Ri = 5 k, galvanically isolated. Configurable for: totalizer(s) reset, measured value suppression, error-message reset. Current input (for Promag 53 only): Active/passive selectable, galvanically isolated, full scale value selectable, resolution: 3 A, temperature coefficient: typ. 0.005% o.r./°C (o.r. = of reading) active: 4...20 mA, Ri ≤ 150 , Uout = 24 V DC, short-circuit-proof passive: 0/4...20 mA, Ri ≤ 150 , Umax = 30 V DC

Output
Output signal Promag 50 Current output: active/passive selectable, galvanically isolated, time constant selectable (0.01...100 s), full scale value selectable, temperature coefficient: typ. 0.005% o.r./°C (o.r. = of reading), resolution: 0.5 A active: 0/4…20 mA, RL < 700 (HART: RL ≥ 250 ) passive: 4…20 mA, operating voltage VS 18...30 V DC, Ri ≤ 150 Pulse/frequency output: passive, open collector, 30 V DC, 250 mA, galvanically isolated. Frequency output: full scale frequency 2...1000 Hz (fmax = 1250 Hz), on/off ratio 1:1, pulse width max. 10 s. Pulse output: pulse value and pulse polarity selectable, max. pulse width configurable (0.5...2000 ms) PROFIBUS-PA interface: PROFIBUS-PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated Current consumption: 11 mA Permissible supply voltage: 9...32 V FDE (Fault Disconnection Electronic): 0 mA Data transmission rate, supported baudrate: 31.25 kBit/s Signal encoding: Manchester II Function blocks: 1x Analog Input, 1 x Totalizer Output data: Volume flow, Totalizer Input data: Positive zero return (ON/OFF), Control totalizer, Value for local display Bus address adjustable via DIP-switches at the measuring device

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PROline Promag 50/53 P

Promag 53 Current output: active/passive selectable, galvanically isolated, time constant selectable (0.01...100 s), full scale value selectable, temperature coefficient: typically 0.005% o.r./°C (o.r. = of reading), resolution: 0.5 A active: 0/4…20 mA, RL < 700 (HART: RL ≥ 250 ) passive: 4…20 mA, operating voltage VS 18...30 V DC, Ri ≤ 150 Pulse/frequency output: active/passive selectable, galvanically isolated (Ex i version: only passive) active: 24 V DC, 25 mA (max. 250 mA during 20 ms), RL > 100 passive: open collector, 30 V DC, 250 mA Frequency output: full scale frequency 2...10000 Hz (fmax = 12500 Hz), EEx-ia: 2...5000 Hz; on/off ratio 1:1; pulse width max. 10 s. Pulse output: pulse value and pulse polarity adjustable, pulse width configurable (0.05...2000 ms) PROFIBUS-DP interface: PROFIBUS-DP/-PA in accordance with EN 50170 Volume 2, IEC 61158-2(MBP), galvanically isolated Data transmission rate, supported baudrat: 9.6 kBaud...12 MBaud Automatic data transmission rate recognition Signal encoding: NRZ-Code Function blocks: 2 x Analog Input, 3 x Totalizer Output data: Volume flow, Corrected volumen flow, Totalizer 1...3 Input data: Positive zero return (ON/OFF), Totalizer control, Value for local display Bus address adjustable via DIP-switches at the measuring device PROFIBUS-PA interface: PROFIBUS-PA in accordance with EN 50170 Volume 2, IEC 61158-2 (MBP), galvanically isolated Current consumption: 11 mA Permissible supply voltage: 9...32 V Data transmission rate, supported baudrate: 31.25 kBit/s Error current FDE (Fault Disconnection Electronic): 0 mA Signal encoding: Manchester II Function blocks: 2 x Analog Input, 3 x Totalizer Output data: Volume flow, Corrected volumen flow, Totalizer 1...3 Input data: Positive zero return (ON/OFF), Totalizer control, Value for local display Bus address adjustable via DIP-switches at the measuring device FOUNDATION Fieldbus interface: FOUNDATION Fieldbus H1, IEC 61158-2 (MBP), galvanically isolated Current consumption: 12 mA Permissible supply voltage: 9...32 V Error current FDE (Fault Disconnection Electronic): 0 mA Data transmission rate, supported baudrate: 31.25 kBit/s Signal encoding: Manchester II Function blocks: 5 x Analog Input, 1 x Discrete Output, 1 x PID Output data: Volume flow, Corrected volumen flow, Totalizer 1...3 Input data: Positive zero return (ON/OFF), Reset totalizer Link Master (LM) functionality is supported

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Signal on alarm



Current output → failure response selectable (e.g. in accord. with NAMUR Recom. NE 43) Pulse/frequency output → failure response selectable Status output (Promag 50) → non-conductive by fault or power supply failure Relay output (Promag 53) → de-energized by fault or power supply failure

Load Switching output

See “Output signal” Status output (Promag 50): Open collector, max. 30 V DC / 250 mA, galvanically isolated. Configurable for: error messages, Empty Pipe Detection (EPD), flow direction, limit values. Relay outputs (Promag 53): Normally closed (NC or break) or normally open (NO or make) contacts available (default: relay 1 = NO, relay 2 = NC) max. 30 V / 0.5 A AC; 60 V / 0.1 A DC, galvanically isolated. Configurable for: error messages, Empty Pipe Detection (EPD), flow direction, limit values, batching contacts.

Low flow cutoff Galvanic isolation

Switch points for low flow cutoff are selectable All circuits for inputs, outputs, and power supply are galvanically isolated from each other.

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Power supply
Electrical connection Measuring unit
f
– 27 + 26 – 25 + 24 – 23 + 22 – 21 + 20

b d
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b

e

a

g

N (L-) 2 L1 (L+) 1

c a

N (L-) L1 (L+)
+ – + – + – + – 20 21 22 23 24 25 26 27

e

1 2

f a b a c b d

Connecting the transmitter, cable cross-section: max. 2.5 mm2 Top: field housing Bottom: wall-mount housing a Cable for power supply: 85...260 V AC, 20...55 V AC, 16...62 V DC Terminal No. 1: L1 for AC, L+ for DC Terminal No. 2: N for AC, L- for DC Signal cable: Terminals Nos. 20–27 → Page 8 Ground terminal for protective conductor Ground terminal for signal-cable shield Service connector for connecting service interface FXA 193 (FieldCheck, ToF Tool-FieldTool Package) Cover of the connection compartment Securing clamp

b c d e f g

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Electrical connection Measuring unit (bus communication)

f
DP (A)/PA (–)/FF (–) DP (B)/PA (+)/FF (+) (DGND) (+5 V) 27 26 25 24 23 22 21 20

b
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b g a

d g c a

e

h

N (L-) 2 L1 (L+) 1

N (L–) L1 (L+)

(+5 V) (DGND) DP (B)/PA (+)/FF (+) DP (A)/PA (–)/FF (–)

e
1 2 20 21 22 23 24 25 26 27

f a g b a c g d b

Connecting the transmitter, cable cross-section: max. 2.5 mm2 Top: field housing Bottom: wall-mount housing a Cable for power supply: 85...260 V AC, 20...55 V AC, 16...62 V DC Terminal No. 1: L1 for AC, L+ for DC Terminal No. 2: N for AC, L- for DC Fieldbus cable: Terminal No. 26: DP (B) / PA (+) / FF (+) (with reverse polarity protection) Terminal No. 27: DP (A) / PA (–) / FF (–) (with reverse polarity protection) DP (A) = RxD/TxD-N; DP (B) = RxD/TxD-P Ground terminal for protective conductor Ground terminal for Fieldbus cable Service connector for connecting service interface FXA 193 (FieldCheck, ToF Tool-FieldTool Package) Cover of the connection compartment Cabel for external termination (only PROFIBUS): Terminal No. 24: +5 V Terminal No. 25: DGND Securing clamp

b

c d e f g

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Terminal assignment, Promag 50
Terminal No. (inputs / outputs) Order variant 50***-***********W 50***-***********A 50***-***********D 50***-***********H 50***-***********S 50***-***********T 20 (+) / 21 (–) Status input – – – 22 (+) / 23 (–) Status output – – – 24 (+) / 25 (–) Frequency output Frequency output – Frequency output Ex i, passive Frequency output Ex i, passive 26 (+) / 27 (–) Current output HART Current output HART Current output HART PROFIBUS-PA Current output Ex i active, HART Current output Ex i passive, HART

Ground connection, power supply → Page 6

Terminal assignment, Promag 53 The inputs and outputs on the communication board can be either permanently assigned or variable, depending on the version ordered (see table). Replacements for modules which are defective or which have to be replaced can be ordered as accessories.
Terminal No. (inputs / outputs) Order variant 20 (+) / 21 (–) 22 (+) / 23 (–) 24 (+) / 25 (–) 26 (+) / 27 (–)

Fixed communication boards (fixed assignment) 53***-***********A 53***-***********B 53***-***********F 53***-***********G 53***-***********H 53***-***********J 53***-***********K 53***-***********S 53***-***********T Relay output – – – – Relay output – – – – Frequency output Frequency output – – – – Frequency output Ex i Frequency output Ex i Current output HART Current output HART PROFIBUS-PA Ex i FOUNDATION Fieldbus, Ex i PROFIBUS-PA PROFIBUS-DP FOUNDATION Fieldbus Current output Ex i active, HART Current output Ex i passive, HART

Flexible communication boards 53***-***********C 53***-***********D 53***-***********L 53***-***********M 53***-***********2 53***-***********4 53***-***********5 Relay output Status input Status input Status input Relay output Current input Status input Relay output Relay output Relay output Frequency output Current output Relay output Current input Frequency output Frequency output Relay output Frequency output Frequency output Frequency output Frequency output Current output HART Current output HART Current output HART Current output HART Current output HART Current output HART Current output HART

Ground connection, power supply → Page 6

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PROline Promag 50/53 P

Electrical connection remote version

Electrode circuit Meas. signal Pipe EPD S1 E1 E2 S2 GND E S 6 5 7 8 4 37 36

Coil circuit

42 41

yellow

brown

green

white

2

1

n.c. 5

n.c. 7 4 37

n.c. 42 41

E1 E2 GND E

n.c. = isolated cable shields, not connected

Cable entry

Power supply and signal cables (inputs/outputs): Cable entry M20 x 1.5 (8...12 mm) Threads for cable entries, PG 13.5 (5...15 mm), 1/2" NPT, 1/2" Connecting cable for remote version: Cable entry M20 x 1.5 (8...12 mm) Threads for cable entries, PG 13.5 (5...15 mm), 1/2" NPT, 1/2"

Cable specifications remote version

Coil cable: 2 x 0.75 mm2 PVC cable with common, braided copper shield ( approx. 7 mm) Conductor resistance: ≤ 37 /km Capacitance: core/core, shield grounded: ≤ 120 pF/m Permanent operating temperature: –20…+80 °C Cable cross-section: max. 2.5 mm2 Signal cable: 3 x 0.38 mm2 PVC cable with common, braided copper shield ( approx. 7 mm) and individually shielded cores With Empty Pipe Detection (EPD): 4 x 0.38 mm2 PVC cable with common, braided copper shield ( approx. 7 mm) and individually shielded cores. Conductor resistance: ≤ 50 /km Capacitance: core/shield: ≤ 420 pF/m Permanent operating temperature: –20…+80 °C Cable cross-section: max. 2.5 mm2

a
a = signal cable, b = coil current cable (cross-section: max. 2.5 mm2)

b

1 = core, 2 = core insulation, 3 = core shield, 4 = core jacket, 5 = core strengthening, 6 = cable shield, 7 = outer jacket

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PROline Promag 50/53 P

Optionally, E+H also supplies reinforced connecting cables with an additional, metal strenghtening braid. We recommend such cables for the following cases: Cables laid underground Danger of rodent attack Device used with ingress protection IP 68 Operation in zones of severe electrical interference: The measuring device complies with the general safety requirements in accordance with EN 61010, the EMC requirements of EN 61326/A1, and NAMUR recommendation NE 21. Caution! Grounding is by means of the ground terminals provided for the purpose inside the connection housing. Keep the stripped and twisted lengths of cable shield to the terminals as short as possible. Supply voltage 85…260 V AC, 45…65 Hz 20…55 V AC, 45…65 Hz 16…62 V DC PROFIBUS-PA and FOUNDATION Fieldbus Non-Ex: 9...32 V DC Ex i: 9...24 V DC Ex d: 9...32 V DC Power consumption AC: <15 VA (including sensor) DC: <15 W (including sensor) Switch-on current: max. 13.5 A (< 50 ms) at 24 V DC max. 3 A (< 5 ms) at 260 V AC Power supply failure Lasting min. 1 power cycle: EEPROM or T-DAT (Promag 53 only) retain the measuring system data in the event of a power supply failure S-DAT = exchangeable data storage chip which stores the data of the sensor (nominal diameter, serial number, calibration factor, zero point, etc.) Standard case Perfect measurement is only ensured when the medium and the sensor have the same electrical potential. Most Promag sensors have a standard installed reference electrode which guarantees the required connection. This usually means that additional potential matching measures are unnecessary. For installation in metal pipes, it is advisable to connect the ground terminal of the transmitter housing to the piping. Also, observe company-internal grounding guidelines.

Potential equalisation

Caution! For sensors without reference electrodes or without metal process terminals, carry out potential matching as per the instructions for special cases described below. These special measures are particularly important when standard grounding practice cannot be ensured or extremely strong matching currents are expected.

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PROline Promag 50/53 P

Metal, ungrounded piping In order to prevent outside influences on measurement, it is advisable to use ground cables to connect each sensor flange to its corresponding pipe flange and ground the flanges. Connect the transmitter or sensor connection housing, as applicable, to ground potential by means of the ground terminal provided for the purpose. Caution! Also, observe company-internal grounding guidelines. Note! The ground cable for flange-to-flange connections can be ordered separately as an accessory from E+H. DN ≤ 300: The ground cable is in direct connection with the conductive flange coating and is secured by the flange screws. DN ≥ 350: The ground cable connects directly to the metal transport bracket.

6 mm Cu

DN ≤ 300

DN ≥ 350

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Plastic pipes and isolating lined pipes Normally, potential is matched using the reference electrodes in the measuring tube. However, in exceptional cases it is possible that, due to the grounding plan of a system, large matching currents flow over the reference electrodes. This can lead to destruction of the sensor, e.g. through electrochemical decomposition of the electrodes. In such cases, e.g. for fibre-glass or PVC piping, it is recommended that you use additional ground disks for potential matching. When using ground disks, note the following points: Ground disks (DN 15...300) can be ordered separately from E+H as an accessory. Ground disks (incl. seals) increase the installation length. You can find the dimensions of ground disks on Page 30. Caution! Risk of damage from electrochemical corrosion. Note the electrochemical insulation rating, if the ground disks and measuring electrodes are made of different materials. Also, observe company-internal grounding guidelines.

Pipes with cathodic protection In such cases, install the measuring instrument without potential in the piping: When installing the measuring device, make sure that there is an electrical connection between the two piping runs (copper wire, 6 mm2). Make sure that the installation materials do not establish a conductive connection to the measuring device and that the installation materials withstand the tightening torques applied when the threaded fasteners are tightened. Also comply with the regulations applicable to potential-free installation.

1 = isolation transformer, 2 = electrically isolated

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Performance characteristics
Reference operating conditions To DIN 19200 and VDI/VDE 2641: Medium temperature: +28 °C ± 2 K Ambient temperature: +22 °C ± 2 K Warm-up period: 30 minutes Installation: Inlet run >10 x DN Outlet run > 5 x DN Sensor and transmitter grounded. Sensor centered relative to the pipe. Maximum measured error Promag 50: Pulse output: ± 0.5% o.r. ± 1 mm/s (o.r. = of reading) Current output: plus typically ± 5 A Promag 53: Pulse output: ± 0.2% o.r. ± 2 mm/s (o.r. = of reading) Current output: plus typically ± 5 A Supply voltage fluctuations have no effect within the specified range.

[%] 2.5 2.0 0.5 % 1.5 1.0 0.5 0 0 1 2 4 v [m/s] 6 8 10
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0.2 %

Max. measured error in % of reading

Repeatability

max. ± 0.1% o.r. ± 0.5 mm/s (o.r. = of reading)

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Operating conditions
Installation conditions
Installation instructions Mounting location Correct measuring is possible only if the pipe is full. Avoid the following locations: Highest point of a pipeline. Risk of air accumulating. Directly upstream of a free pipe outlet in a vertical pipe.

Installation of pumps Do not install the sensor on the intake side of a pump. This precaution is to avoid low pressure and the consequent risk of damage to the lining of the measuring tube. Information on the lining's resistance to partial vacuum can be found on Page 21. It might be necessary to install pulse dampers in systems incorporating reciprocating, diaphragm or peristaltic pumps. Information on the measuring system's resistance to vibration and shock can be found on Page 19.

Partially filled pipes Partially filled pipes with gradients necessitate a drain-type configuration. The Empty Pipe Detection (EPD) function offers additional protection by detecting empty or partially filled pipes. Caution! Risk of solids accumulating. Do not install the sensor at the lowest point in the drain. It is advisable to install a cleaning valve.

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PROline Promag 50/53 P

Vertical pipes Install a siphon (b) or a vent valve (a) downstream of the sensor in vertical pipes longer than 5 meters. This precaution is to avoid low pressure and the consequent risk of damage to the lining of the measuring tube. These measures also prevent the system losing prime, which could cause air inclusions. Information on the lining's resistance to partial vacuum can be found on Page 21.

a = vent valve, b = siphon

Orientation An optimum orientation helps avoid gas and air accumulations and deposits in the measuring tube. Promag, nevertheless, supplies a range of options and accessories for correct measuring of problematic mediums: Electrode Cleaning Circuitry (ECC) to remove electrically conductive deposits in the measuring tube, e.g. in accretive mediums. Empty Pipe Detection (EPD) for recognition of partially filled measuring tubes, or for degassing mediums or for applications with fluctuating process pressure. Vertical orientation: This orientation is ideal for self-emptying piping systems and for use in conjunction with Empty Pipe Detection.

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Horizontal orientation: The measuring electrode-plane should be horizontal. This prevents brief insulation of the two electrodes by entrained air bubbles. Caution! Empty Pipe Detection functions correctly only when the measuring device is installed horizontally and the transmitter housing is facing upward. Otherwise there is no guarantee that Empty Pipe Detection will respond if the measuring tube is only partially filled or empty.

1 = EPD electrode (Empty Pipe Detection) 2 = Measuring electrodes (signal detection) 3 = Reference electrode (potential equalisation)

Vibrations Secure the piping and the sensor if vibration is severe. Caution! It is advisable to install sensor and transmitter separately if vibration is excessively severe. Information on resistance to vibration and shock can be found on Page 19.

> 10 m

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Foundations, supports If the nominal diameter is DN ≥ 350, mount the transmitter on a foundation of adequate loadbearing strength. Caution! Do not allow the casing to take the weight of the sensor. This would buckle the casing and damage the internal magnetic coils.

Inlet and outlet runs

If possible, install the sensor well clear of fittings such as valves, T-pieces, elbows, etc. Compliance with the following requirements for the inlet and outlet runs is necessary in order to ensure measuring accuracy: Inlet run ≥ 5 x DN Outlet run ≥ 2 x DN

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Adapters

Suitable adapters to (E) DIN EN 545 (double-flange junction sections) can be used to install the sensor in larger-diameter pipes. The resultant increase in the rate of flow improves measuring accuracy with very slow-moving fluids. The nomogram shown here can be used to calculate the pressure loss caused by reducers and expanders. The nomogram applies only to fluids of viscosity similar to water: 1. Calculate the ratio of the diameters d/D. 2. From the nomogram read off the pressure loss as a function of flow velocity (downstream from the reduction) and the d/D ratio.

Length of connecting cable

Permissible cable length Lmax depends on the conductivity of the medium. A minimum conductivity of 20 S/cm is required for measuring demineralized water.
[S/cm] 200

L max

100

5 10 100 L max
Gray shaded area = permissible range for medium conductivity Lmax = length of connecting cable in [m] Medium conductivity in [S/cm]

[m] 200

In order to ensure measuring accuracy, moreover, comply with the following instructions when installing the remote version: Secure the cable run or route the cable in a conduit. Movement of the cable can falsify the measuring signal, particularly if the conductivity of the medium is low. Route the cable well clear of electrical machines and switching elements. Ensure potential equalisation between sensor and transmitter, if necessary. 18 Endress+Hauser

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Environment
Ambient temperature Standard: –20…+60 °C (sensor, transmitter) Optional: –40...+60 °C (transmitter) Note the following points: Install the device at a shady location. Avoid direct sunlight, particularly in warm climatic regions. If both fluid and ambient temperatures are high, install the transmitter at a remote location from the sensor (→ “Medium temperature”) At ambient temperatures below –20 °C the readability of the display may be impaired. Storage temperature –10...+50 °C (preferably +20 °C) The measuring device must be protected against direct sunlight during storage in order to avoid unacceptably high surface temperatures. Choose a storage location where moisture does not collect in the measuring device. This will help prevent fungus and bacteria infestation which can damage the liner. Do not remove the protective plates or caps on the process connections until the device is ready to install. This is particularly important in the case of sensors with PTFE linings. Degree of protection St