UL-1989:2013 pdf free download – STANDARD FOR SAFETY Standby Batteries.
7.6 Test for flame propagation
7.6.1 After the test described in 7.5.2 for sustained burning, one of each of the conditioned vent caps is to be installed as described in 7.5.2 with the test enclosure cover shown in Figure 7.3, in place as shown in Figure 7.4. The gas mixture is to be allowed to flow into the test fixture. Six attempts are to be made to ignite the gas venting from the cap, approximately 12.7 mm (1/2 in) from the vent cap opening, using the spark ignition source located in the path of the gas flow. There is to be a 10-s interval between each ignition attempt.
7.6.2 The test described in 7.6.1 is to be repeated for each of the samples at each of the appropriate gas mixture flow rates as indicated in Table 7.1.
7.6.3 The results are not acceptable if there is evidence of flame propagation through the vent cap to within the fixture, as determined by rupture of the 0.025 mm (1 mil) polyethylene-film window in the top of the hydrogen test fixture.
8 Capacity Rating Tests
8.1 A storage battery shall be capable of supplying and maintaining the maximum total load, at a specific temperature range, for a period not less than that indicated in the marking, but in no case for less than 1-1/2 h and not less than 87.5% rated battery voltage.
8.2 The following data is to be supplied by the battery manufacturer:
a) Battery type and rated voltage.
b) Charging system to be used, either:
1) Controlled voltage;
2) Controlled current; or
3) A combination controlled voltage and controlled current.
c) Range of charging rates:
1) Voltage (maximum and minimum); or
2) Current (maximum and minimum), or both.
d) Current rating is to be a 1-1/2 h constant discharge current, resulting in an end-of-discharge voltage no less than 87.5% and no greater than 100% of rated voltage.
e) Whether the battery is to be used at room temperature, 25 ±5°C (77 ±9°F) or within an expanded temperature range.
f) Electrolyte maintenance instructions, if needed.
8.5 The applicant has the option of having the battery tested for use at room temperature or within an expanded temperature range. Batteries shall be rated for the ambient temperature or temperature range in which the equipment they are to be installed in is intended to operate. For batteries intended to operate at temperatures other than 25 ±5°C (77 ±9°F) the lower limit of the range shall be 10°C (50°F) or a lower temperature than 10°C in 10°C (18°F) increments. The upper limit of the range shall be 40°C (1 04°F) or a higher temperature than 40°C in 10°C (18°F) increments. Room temperature test conditions are specified in 8.6 and temperature range test conditions are given in 8.7.
8.6 All tests are to be conducted at an ambient temperature of 25 ±5°C (77 ±9°F).
8.7 Each test is to be conducted after 24 h of either condition A or B and while maintained at the specified condition. The total time of exposure to the environmental conditions will depend on the specified initial charge and recharge times for the Capacity Rating Test. The applicant has the option of using the same battery for testing under both A and B conditioning. However, the battery must under go a full conditioning for each condition it is tested under. Conditions A and B are specified below. The test temperatures for both conditions A and B are not to vary from the rated value by more than ±2°C (±3.6°F).