ISA 12.13-1 : 1995

1. Scope
2. Purpose
3. Definitions
4. General Requirements
5. Construction
5.1 General
5.2 Meters and Indicators
5.3 Alarm or Output Function
5.4 Trouble Signals
5.5 Controls and Adjustments
5.6 Batteries
6. Marking and documentation
6.1 General
6.2 Marking on Instruments
6.3 Instruction Manual
7. Performance Tests
7.1 General
7.2 Sequence
7.3 Preparation of Instrument
7.4 Conditions for Test and Test Area
7.5 Selectable Gas/Range Instruments
7.6 Unpowered Preconditioning Storage
7.7 Drop test
7.8 Vibration
7.9 Calibration
7.10 Accuracy
7.11 Temperature Variation
7.12 Step Change Response to 100 Percent Calibration Gas
7.13 Humidity Variation
7.14 Air Velocity Variation
7.15 Supply Voltage Variation
7.16 Electromagnetic Interference (EMI)
7.17 Long-Term Stability
7.18 Flooding with Undiluted Gas
7.19 Dielectric Strength
Annexes
A. References
B. Explanatory Notes

This standard addresses the details of construction, performance, and testing of portable, mobile, and stationary electrical instruments used for sensing the presence of combustible gas or vapor concentrations in ambient air.