Recorder / Indicator Material Selection in Instrumentation

This article is about Recorder / Indicator Material Receiving Checklist and Recorder / Indicator Material Selection of Instrumentation and Control Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.

Recorder / Indicator Material Selection in Instrumentation

Material Receiving General Checklist for Instrumentation & Control

“Instruments and control systems shall operate continuously under the following ambient air temperatures without any degradation of the manufacturer’s guaranteed performance:
(1) Indoor Air conditioned, 10°C(50°F) to 35°C(95°F)
(2) Outdoor sheltered, 0°C (32°F) to 55°C (32°F)
(3) Outdoor unsheltered conditions, 0°C (32°F) to 65°C (149°F)”
The vendor to provide certification that temperature instrumentation shall meet the relevant requirements of SAES-J-003 pertaining to indoor and outdoor environmental conditions. Typical dust (particulate) and gaseous concentration levels in the air are specified in SAES-A-112, Paragraph 4.6 (See Attachment 1)
Equipment which is not enclosed or hermetically sealed, but is situated offshore or near shore, shall be protected against corrosion and operational failure due to wind-borne sea water spray and the accumulation of wetted salt (NaCl). SAES-A-112, Paragraph 4.6.dust (particulate) and gase (See Attachment 1)
“Electrical and electronic installation and wiring of temperature instrumentation shall be in compliance with SAES-J-902.
Exception: Cast Aluminum heads may be used.”
Direct-connected, field-mounted recorders shall have a 300 mm diameter chart, and a 24 hour or 7 day chart drive. Only recorder pens with felt tip, or capillary inking systems are acceptable.
Electronic Field Instrument shall be compatible with the enviornment (Climate and electrical clasification)

Multi point Indicators and Multiplexers for Thermocouple – Based Devices

Multipoint temperature indicators shall consist of a panel-mounted readout and a means of selecting the desired thermocouple to display.
Multiplexers shall take the signals from a number of thermocouples as inputs and provide an output to a logic control system (DCS, PLC, etc.).
Multipoint indicators and multiplexers shall provide linearization, cold junction compensation and scaling of the thermocouple input signals.
Signals from multipoint indicators or multiplexers shall not be used for control.
A maximum of 100 thermocouple inputs (including spares) shall be permitted per multipoint indicator or multiplexer. Recommended spare capacity is 25% of the number of occupied inputs.

Multi point Indicators and Multiplexers for RTD – Based Devices

Multipoint temperature indicators shall consist of a panel-mounted readout and toggle switches or pushbuttons to select the desired RTD to display.
Multiplexers shall take the signals from a number of RTDs as inputs and provide an output to a logic control system (DCS, PLC, etc.).
Multipoint indicators and multiplexers shall provide linearization and scaling of the RTD input signals.
Signals from multipoint indicators or multiplexers shall not be used for control.
A maximum of 100 RTD inputs (including spares) shall be permitted per multipoint indicator or multiplexer. Recommended spare capacity is 25% of the number of occupied inputs.

International Standard and Codes for Recorder / Indicator Material

Copper Tubing, Brass Fittings, and Valves for Instrument Service

3. SAES-J-002 -Technically acceptable instruments, 23 June 2008
4. SAES-J-003 – Instrumentation – Basic Design Criteria, 16 January 2008
5. SAES-A-112 – Meteorological and Seismic Design Data, 31 October 2006
6. SAES-J-400 – Temperature, 31 May 2004
7. PIP PCFTE 000 – Temperature measurement Fabrication details, April 2000
8. PIP PCCTE001 – Temperature Measurement Criteria, July 1999
9. PIP PCCPR001 – Pressure Measurement Criteria, April 2007

1. Attachment 1: Ambient Air Quality

2. Attachment 2: Technically Accepted Recorders and Indicators