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IM-P402-139

AB Issue 1

PA420

4 - 20 mA Loop Powered Level Preamplifier

Installation and Maintenance Instructions

1. Safety information

2. General

product information

3. Installation

4. Wiring

5. Commissioning

6. Maintenance

7. Fault finding

8. Technical data

IM-P402-139

AB Issue 1

4026150/1

Printed in the UK

Содержание PA420

Страница 1: ...Preamplifier Installation and Maintenance Instructions 1 Safety information 2 General product information 3 Installation 4 Wiring 5 Commissioning 6 Maintenance 7 Fault finding 8 Technical data IM P402...

Страница 2: ...IM P402 139 AB Issue 1 2...

Страница 3: ...l or National standards and regulations Guidance Notes Health and Safety Executive BG01 and INDG436 in the UK The requirements of Approvals Authorities Boiler inspection bodies Boiler manufacturer s s...

Страница 4: ...aximum and minimum values If the maximum operating limits of the product are lower than those of the system in which it is being fitted or if malfunction of the product could result in a dangerous ove...

Страница 5: ...uble block and bleed and the locking or labelling of closed valves Do not assume that the system has depressurised even when the pressure gauge indicates zero 1 8 Temperature Allow time for temperatur...

Страница 6: ...ion must be made to protect products which are not self draining against frost damage in environments where they may be exposed to temperatures below freezing point 1 15 Disposal Unless otherwise stat...

Страница 7: ...irax Sarco and standard industrial controls which are used to control or monitor level It has two buttons and a dual coloured light red and green for use at commissioning It consists of a tubular aust...

Страница 8: ...the preamplifier to the probe and hand tighten only 3 Installation Fig 2 4 Wiring 4 1 General information Cabling should be installed in accordance with BS 6739 Instumentation in Process Control Syste...

Страница 9: ...Screen Loop Internally connected to PA420 body earthed DO NOT connect to any other earth Follow the installation instructions of the instrument the PA420 is connected to 4 3 Cable socket To unplug the...

Страница 10: ...ion span To configure the water levels Step 1 Set the water level to the desired 4 mA or 20 mA level Step 2 Press the 4 mA or 20 mA button for three seconds Step 6 Repeat the above to configure the se...

Страница 11: ...on For specific testing instructions for Spirax Sarco systems please see separate literature 100 20 mA Absolute maximum safe water level Set point 50 0 4 mA Absolute minimum water level water must alw...

Страница 12: ...age across terminals 1 and 2 and ensure it is within specification See Section 8 3 Check the polarity of the supply Plug the connector back in Check the loop current is within specification See Figure...

Страница 13: ...eplacement product follow the actions in Section 7 1 Generic faults 3 Light flashes red 3 times repeatedly and alarm output Level input was too high The measured level signal from the LP20 was too hig...

Страница 14: ...ogether The level input was not saved in memory 1 2 3 Check the button has not been damaged Check around the product to ensure that nothing is pressing on the buttons Follow the actions in Section 7 1...

Страница 15: ...5 6 Light flashes red 6 times repeatedly Watchdog timeout The internal microcontroller has briefly stopped and recovered automatically 1 2 Follow the actions in Section 7 1 Generic faults Monitor data...

Страница 16: ...ipment being returned 3 Full description of the fault or repair required 4 If the equipment is being returned under warranty please indicate a Date of purchase b Original order number 8 2 Limiting con...