ANSI Z21.77:2005 pdf download.Manually Operated Piezo-Electric Spark Gas Ignition Systems And Components.
2.1 General
2.1.1 Plezo ignition systems and components shall be tested with the test gas(es) selected by the manufacturer, unless otherwise specified herein.
2.1.2 The tests specified in 2.3, Operating Effort, shall be conducted on two samples of the device. These same two test samples shall also be used for conduct of 2.4, Arc Overs, 2.5. Ignition, and 2.6, Endurance.
2.1.3 All components used during the tests specified in this standard shall be those supplied by the manufacturer (see 1.2.5).
2.1.4 Thermocouples of wire size not larger than No. 24 AWG (0.20 mm2) shall be attached by the testing agency to one device wbmitted for test and shall be used to preset the test chamber to develop the temperatures specified in 1.2.3-c.
2.1.5 Unless otherwise specified herein, tests shall be conducted with the electrode positioned adjacent to a test burner(s) having suitable port configuration in accordance with the relationship specified by the manufacturer. The specified dimensions and positions are given for test purposes only and are not to be construed as limiting the appliance application.
2.1.6 Unless otherwise specified herein, performance tests shall be conducted at a room temperature of 77 ±10°F (25 ±5.5°C).
For tests conducted at other than room temperature, the test temperature shall be within ±3F (ii .5C) of the specified value.
2.2 Test Gases
For all tests, gases with characteristics approximately as shown in Table I, Characteristics of Test Gases, shall be used as specified by the manufacturer. (See 2.1.1.)
When use with more than one type of gas Is desired, the tests need be conducted with only one test gas, provided there are no changes In the device for use with different gases which, in the opinion of the testing agency, would affect the results of these tests.
2.3 Operating Effort
The operating effort shall not exceed, as applicable:
a. A torque of 5 lb/in (0.56 N.m) at an angular velocity of 180 degrees (3.14 rad) per second; or
b. A linear force of 8 lb (35.6 N).
2.4 Arc-Overs
A piezo ignition system or component shall not produce arc-oven when tested as specified in the following Method of Test,
Method of Test
The two devices previously tested under 2.3, Operating Effort, shall be subjected to this test and both shall comply.
For this Lest the manufacturer’s specified minimum high voltage lead length shall be used (see 1.2.3-b).
The piezo ignition system or component shall be installed in a manner to simulate application to an appliance in accordance with the manufacturer’s instructions (see 1.7, Instructions). The electrode gap shall be adjusted to 150 percent of the maximum gap specified by the manufacturer.
The spark generator shall be operated ten times in a darkened room or test chamber with at least a live second waiting period between each operation.
There shall be no visual evidence of arc-oven at any point other than at the electrode gap.
2.5 Ignition
2.5.1 The test apparatus to be used for conducting ignition tests shall be provided by the manufacturer or the test agency, at the manufacturer’s discretion.
2.5.2 A piezo ignition system or component shall reliably ignite the test burner gas as specified in the following Method of Test.
Method of Test
Two devices previously tested under 2.3, Operating Effort, and 2.4, Arc-Overs, shall be subject to this test and both shall comply.
The piezo-electric generator of the ignition system shall be mounted in a test chamber with the articulating means projecting through a suitable opening in the chamber wall.
Each output terminal of a generator of the ignition system shall be connected to the specified number of spark electrodes. One spark electrode from each output shall be subjected, in turn, to the ignition test specified below.
