Specifications Relating to Timber Dimension Measuring Devices (SI/2024-48)

Marginal note:Influence factors

4 A timber dimension measuring device must perform within the applicable limits of error referred to in section 3 when, under controlled conditions, the device is tested while it is exposed to an influence factor, such as:

• (a) if the device is powered by alternating current, a voltage that is within the range of -15% to +10% of the nominal voltage of the device;

• (b) if the device is powered by direct current,

  • (i) a voltage that is less than the nominal voltage of the device and at which voltage the device can produce a measurement registration, and

  • (ii) a voltage that is up to 10% greater than the nominal voltage of the device;

• (c) a temperature that is

  • (i) in the case where the temperature range specified for the device by the manufacturer is a range that spans at least 30°C and is entirely within the default temperature range, that specified temperature range, and

  • (ii) in any other case, the default temperature range;

• (d) a humidity level of up to 85% relative humidity and a temperature that is

  • (i) in the case where the temperature range specified for the device by the manufacturer is a range that spans at least 30°C and is entirely within the default temperature range, that specified temperature range, and

  • (ii) in any other case, the default temperature range;

• (e) if the device measures using optical principles, an ambient light level that is within the range of 100 lx to 100 000 lx; and

• (f) if the device measures using acoustic principles, an acoustic interference of up to 100 dB at the nominal centre frequency of the device’s ultrasonic transducers.