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P26 Instruction Manual 

2 Safety precautions 

2.1 Appropriate use 

The P26 is used to measure pressure, volumetric flow, mass flow and flow rate. 

 

Always observe the operating requirements—particularly the permissible supply voltage—

indicated on the rating plate and in the “Technical data” section of this manual. 

 

The instrument may only be handled as indicated in this manual. Modifications to the 

instrument are prohibited. The manufacturer is not liable for damages caused by improper use 

or failure to follow these instructions. Violations of this type render all warranty claims null and 

void. 

2.2 Shipping, assembly, electrical connections and startup 

Do not close the pressure inlets during shipping. Changes in barometric pressure may 

damage devices with low measuring ranges. 

 

Assembly and the electrical connections should only be handled by professionals. They should 

be given proper training and be authorised by the operator of the facility. 

 

The instrument may only be operated by appropriately trained individuals who have been 

authorized by the operator of the facility. 

 

Do not carry out a function test with compressed or breathable air. This would damage 

instruments with low measuring ranges. 

 

Measurement errors may occur if the instrument is not kept protected from sunlight. 

Specific safety precautions are given in individual sections of this manual. 

 

2.3 Troubleshooting, maintenance, repairs, disposal 

The individual responsible for the electrical connections must be notified if the instrument is 

damaged or if errors occur that cannot be corrected as indicated in Section 10. 

 

This individual must take the instrument out of service until the error has been corrected and 

ensure that it cannot be used unintentionally. 

 

Always unplug the power cord before opening the instrument! 
 

This instrument requires no maintenance. 

Only the manufacturer may perform repairs that require the housing to be opened. 

 

The electronic components of the instrument contain environmentally hazardous materials and 

materials that can be reused. The instrument must therefore be sent to a recycling plant when 

you no longer wish to use it. The environment codes of your particular country must be 

complied with. 

Summary of Contents for P26

Page 1: ...Pressure Transducer halstrup walcher GmbH Stegener Strasse 10 D 79199 Kirchzarten GERMANY Phone 49 7661 39 630 Fax 49 7661 396 399 E Mail info halstrup walcher com Internet www halstrup walcher com Do...

Page 2: ...nal ports and keys 9 3 4 Front view 12 4 Zero point calibration cycle 13 5 Overpressure protection 13 6 Display optional 13 7 Menu optional 13 7 1 Display 14 7 2 Scale 14 7 2 1 Pressure 14 7 2 1 1 Top...

Page 3: ...17 7 4 4 Warning signal 17 7 4 5 Resolution 18 7 4 6 Zero point calibration 18 7 4 7 CS creep suppression 18 7 4 8 Read factory settings 18 7 4 9 Code 18 8 Serial interface optional 18 8 1 Settings 18...

Page 4: ...the lifecycle of the instrument It must be provided to any individuals who assume responsibility for operating the instrument at a later date It must include any supplementary materials provided by t...

Page 5: ...trained individuals who have been authorized by the operator of the facility Do not carry out a function test with compressed or breathable air This would damage instruments with low measuring ranges...

Page 6: ...rns you of a potential hazard that could lead to bodily injury up to and including death if the corresponding instructions are not followed CAUTION This warns you of a potential hazard that could lead...

Page 7: ...Measurement of differential pressure Measurement of volumetric flow mass flow and flow rate Display of a measured value Monitoring of a variety of threshold parameters Actual pressure value Calculati...

Page 8: ...ation Confirm Up Max display Increase value or scroll up Right Min display Move the cursor or scroll down In measurement mode the keys perform the following functions The Enter key starts a zero point...

Page 9: ...P26 Instruction Manual 9 3 3 Internal ports and keys Standart version with external zero point calibration...

Page 10: ...l 10 Standard Version Output signal Relay 1 Relay 2 Power supply RS232 interface for PC Reset Version mit externer Nullierung Output signal Relay 1 Relay 2 Power supply ext offset calibration RS232 in...

Page 11: ...interface for PC RS232 or USB Interface interface for parameter settings Reset The processor is restarted Port description Description 1 OUT_I Current output 2 OUT_GND Earth 3 OUT_U Voltage output Z...

Page 12: ...3 Reception TXD 2 Send GND 5 Earth USB Port description PIN Description Power 1 Power supply for USB from PC D bidirectional 2 USB Data negative polarity D bidirectional 3 USB Data positive polarity...

Page 13: ...e zero point calibration is deactivated or the P26 is in the menu 5 Overpressure protection The P26 has an internal overpressure safeguard that protects the precision pressure measurement capsule from...

Page 14: ...ndicates the output value This pressure range forms the basis for many other settings such as the limits for the relays warnings and factors for the flow display There are two default settings for the...

Page 15: ...s The following sub menu items are available Value Unit 7 2 3 1 Value This is used to set the mass flow value displayed at the maximum scaled pressure 0 is always used as the lower scale value on the...

Page 16: ...y is displayed select the Pa unit 7 3 2 Hysteresis This item can be used to select the hysteresis for the particular relay The action described in 7 3 1 applies to the entry unit The hysteresis is alw...

Page 17: ...put Filter Warning signal Resolution Zero point calibration CS creep suppression Read factory settings Code 7 4 1 Language The menu language can be selected with this menu item You can choose from the...

Page 18: ...works with volumetric flow mass flow and flow rate root extracted measurement values 7 4 8 Read factory settings The factory settings are established in the instrument before delivery With this menu i...

Page 19: ...nit 120 120 from measurement range floating RRelai1 Switching direction for Relay 1 1 decreasing 0 off 1 increasing int SRelai1 Sound for Relay 1 ms 0 Off max 1000ms HRelai1 Hysteresis relay 1 Pa 0 12...

Page 20: ...int DAC Out Analogous output signal 0 4 20mA 1 0 20mA 2 5 to 5V 3 0 10V unsigned int Res Resolution 0 max 1 0 01 2 0 1 3 0 2 4 0 5 5 1 unsigned int UnitD Unit display 0 Pa 1 hPa 2 kPa 3 mbar 4 mmH2O...

Page 21: ...ltage See rating plate Output signal 0 10 V RL 2 k or 5 5 V RL 2 k or 0 20 mA RL 500 or 4 20 mA RL 500 Relays 2 x change over contacts For each relay 6A 230 VAC Interface RS 232 9600 Baud 8 data bits...

Page 22: ...P26 Instruction Manual 22 11 Dimension drawing 147 5 1 5 56 5 1 5 25 39 5 20 92 5 162 100 5 6 5 6 5 4 5 14 5 27 75...

Page 23: ...mH2O mmHg psi inH2O inHg m s m h kg s kg min kg h m s mph f s f min km h Scaling Pressure Top xxxx x Bottom xxxx x Unit Pa hPa kPa mbar mmH2O mmHg psi inH2O inHg Vol Flow Value xxxxxxx x Unit m s m h...

Page 24: ...11 xxxxx ms Warning signal xxxxx ms Filter Rev2 14 off on Mode increasing decreasing Settings Language English German Italian French Output 4 20 mA 0 20 mA 5 5V 0 10 V Filter xxxxx ms Warning signal...

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