ifm PG27xx User Manual

Operating instructions Electronic manometer

PG27xx

704553 / 01 09 / 2010

Contents

1 Preliminary note ��4

1�1 Symbols used ��4

2 Safety instructions ��4

3 Functions and features ��5

3�1 Applications ��5

4 Function ��5

4�1 Processing of the measured signals ��5 4�2 Pressure monitoring / switching function ��6 4�3 Pressure monitoring / analogue function ��7 4�4 Customer-specific calibration ��8

5 Installation��9

6 Electrical connection ��10

7 Operating and display elements �� 11

8 Menu ��12

8�1 Menu structure: main menu ��12 8�2 Explanation of the main menu ��13 8�3 Menu structure: level 2 (extended functions) ��14 8�4 Explanation of the menu level 2 ��15

9 Parameter setting ��16

9�1 General parameter setting ��16 9�2 Configuration of the digital display (optional) ��18 9�3 Set output signals ��19

9�3�1 Set output functions ��19 9�3�2 Set switching limits ��19 9�3�3 Scale analogue value for OUT2 ��19

9�4 User settings (optional) ��20

9�4�1 Carry out zero point calibration ��20 9�4�2 Set delay time for OUT1 ��20 9�4�3 Set switching logic for OUT1 ��20 9�4�4 Set damping for the switching signal ��20 9�4�5 Set damping for the analogue signal ��21 9�4�6 Calibrate curve of measured values ��21

9�5 Service functions ��22

9�5�1 Read min/max values for system pressure ��22 9�5�2 Reset all parameters to factory setting ��22

10 Operation ��22

10�1 Read set parameters ��22 10�2 Error indications ��22

11 Scale drawing ��23

12 Technical data ��24

13 Setting ranges��26

14 Factory setting ��27

1 Preliminary note

1.1 Symbols used

► Instruction > Reaction, result […] Designation of pushbuttons, buttons or indications → Cross-reference

Important note Non-compliance can result in malfunctions or interference�

Information Supplementary note�

2 Safety instructions

• Please read this document prior to set-up of the unit� Ensure that the product is suitable for your application without any restrictions�

• If the operating instructions or the technical data are not adhered to, personal injury and/or damage to property can occur�

• Check the compatibility of the product materials (→ 12 Technical data) with the media to be measured in all applications�

• Use in gases at pressures > 25 bar only after contacting the manufacturer ifm�

For the scope of validity cULus: The device shall be supplied from an isolating transformer having a secondary Listed fuse rated either a) max 5 amps for voltages 0~20 Vrms (0~28�3 Vp) or b) 100/Vp for voltages of 20~30 Vrms (28�3~42�4 Vp)�

The Sensor shall be connected only by using any R/C (CYJV2) cord, having suitable ratings�

3 Functions and features

The unit monitors the system pressure in a plant�

3.1 Applications

Type of pressure: relative pressure

Measuring range

Order no.

extended display range)

bar PSI bar PSI bar PSI PG2793 -1��25 (40) -14�4��362�7 (580�2) 100 1450 350 5070 PG2794 -1��10 (16) -14�5��145 (232) 50 725 150 2175 PG2795 -1��4 (6�4) -14�5��58 (92�8) 30 435 100 1450 PG2796 -0�124��2�5 (4) -1�8��36�27 (58�02) 20 290 50 725 PG2797 -0�05��1 (1�6) -0�73��14�5 (23�21) 10 145 30 435 PG2799 -1��1 (1�6) -14�5��14�5 (23�20) 10 145 30 435

mbar inH2O bar PSI bar PSI PG2798 -12�4��250 (400) -5�0��100�4 (160�6) 10 145 30 435 PG2789 -5��100 (160) -2�0��40�15 (64�25) 4 58 30 435

(in brackets:

Permissible

overpressure

Bursting

pressure

Avoid static and dynamic overpressure exceeding the given overload pressure by taking appropriate measures� The indicated bursting pressure must not be exceeded� Even if the bursting pressure is exceeded only for a short time, the unit may be destroyed� ATTENTION: risk of injury! Use in gases at pressures > 25 bar only after contacting the manufacturer ifm�

The unit can be operated at media temperatures up to 145°C (max� 1h) / 125°C (permanently)� Therefore it is suitable for all standard cleaning and sterilisation processes (CIP, SIP)�

Not to be used in a system that has to fullfill D10�1�2/74-03 of 3A standard 74-03�

4 Function

4.1 Processing of the measured signals

• The unit generates 2 output signals according to the parameter settings�

OUT1 • Switching signal for system pressure limit value� OUT2 • Analogue signal (4��20 mA, 20��4 mA)�

• The unit displays the current system pressure�

• Analogue display: circular scale with pointer; in addition:

- Trend display (rising pressure / falling pressure)�

- Display of set point and reset point�

- Maximum value memory and minimum value memory�

- System pressure above the measuring range / in the extended display range�

• Digital display (alphanumeric display, 4 digits)�

4.2 Pressure monitoring / switching function

OUT1 changes its switching state if it is above or below the set switching limits (SP1, rP1)� The following switching functions can be selected:

• Hysteresis function / normally open: [OU1] = [Hno] (→ fig� 1)�

• Hysteresis function / normally closed: [OU1] = [Hnc] (→ fig� 1)� First the set point (SP1) is set, then the reset point (rP1) with the requested difference�

• Window function / normally open: [OU1] = [Fno] (→ fig� 2)�

• Window function / normally closed: [OU1] = [Fnc] (→ fig� 2)� The width of the window can be set by means of the difference between SP1 and rP1� SP1 = upper value, rP1 = lower value�

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P = system pressure; HY = hysteresis; FE = window

4.3 Pressure monitoring / analogue function

The analogue output can be configured�

• [OU2] defines whether the set measuring range is provided as 4��20 mA ([OU2] = [I]) or as 20��4 mA ([OU2] = [InEG])�

Scaling can be set by means of the teaching process or by entering a value for the ASP and AEP parameters�

• Teaching the analogue start point [tASP] or setting the parameter [ASP] defines at which measured value the analogue signal is 4 mA (20 mA at [InEG])�

• Teaching the analogue end point [tAEP] or setting the parameter [AEP] defines at which measured value the output signal is 20 mA (4 mA at [InEG])�

Minimum distance between [ASP] and [AEP] = 25 % of the final value of the measuring range�

Factory setting Measuring range scaled

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P = system pressure , MAW = initial value of the measuring range, MEW = final value of the measuring range

: [OU2] = [I]; 2: [OU2] = [InEG]

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In the set measuring range the output signal is between 4 and 20 mA ([OU2] = [I]) or between 20 and 4 mA ([OU2] = [InEG])� It is also indicated:

• System pressure above the measuring range:

- Output signal 20 to 20�5 mA at [OU2] = [I]�

- Output signal 4 to 3�8 mA at [OU2] = [InEG]�

• System pressure below the measuring range:

- Output signal 4 to 3�8 mA at [OU2] = [I]�

- Output signal 20 to 20�5 mA at [OU2] = [InEG]� 7

4.4 Customer-specific calibration

The customer-specific calibration changes the curve of measured values compared to the real measured values (shifting / change of the gradient; → 9�4�6 [CAL])�

• Two calibration points can be defined (CP1, CP2)� The two points are independent of each other� They must be within the measuring range and not in the extended display range�

• The zero point calibration [COF] influences the calibration of the curve of measured values� Recommendation: set [COF] to 0 (→ 9�4�1 [COF]), then calibrate the curve of measured values�

After a change the calibration can be reset to factory setting (→ 9�5�2 [rES])�

• P = measured pressure;

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P‘ = modified measured value

• CP1 = calibration point 1;

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CP1‘ = modified measured value for CP1

• CP2 = calibration point 2; CP2‘ = modified measured value for CP2

• 1 = curve of measured values at factory setting

• 2 = curve of measured values after calibration

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5 Installation

Before installing and removing the unit: make sure that no pressure is applied to the system� Note: If 0% is displayed and no pointer is visible, this does not mean that no pressure is applied to the system !

We recommend horizontal installation for high medium temperatures�

Use in hygienic installation situation following 3A

Orientation of the sensor in the pipe and tank To ensure optimised cleanability in the

area of the measuring cell according to the sanitary 3A criteria the sensor must not be installed at the lowest point (pos� 5 - see drawing) in a pipe or tank to allow the medium to flow off�

Use in hygienic areas to EHEDG

► Make sure that the sensors are integrated into the system in accordance with

EHEDG�

The unit can be fixed to different process connections� Options are as follows:

1 Installation using an adapter with sealing ring (order no. E332xx / E333xx)

The adapters are supplied with an EPDM O-ring (order no� E30054)� More sealing rings are available as accessories: FKM O-ring (order no� E30123); PEEK sealing ring (order no� E30124)� Concerning installation → Installation instructions supplied with the adapter�

2 Installation using an adapter with metal-to-metal seal

Order no� E337xx / E338xx Concerning installation → Installation instructions supplied with the adapter�

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