Introduction
Scope
General
Glossary
Alarm，Sensor and/or Detector Reliability Prediction<br>
4.1 Reliability Prediction for an alarm, assembly or circuit<br>
Section 2.0 MIL-HDBK 217F: 4 failures per milliion hours<br>
Appendix A MIL-HDBK 217F: 3.5 failures per million hours<br>
4.2 Reliability Prediction for a sensor or a individual components<br>
Section 3.4 MIL_HDBK 217F: 2.5 failures per million hours<br>
4.3 Components Exception for the above test<br>
a) Results in energization of an audible trouble signal, energization of a separate visual indication, or de-energization of a power-on light<br>
b) Does not effct the normal operation or sensitivity<br>
c) evaluated by specific performance tests included in the standard<br>
4.4 Exceptions: integral or remote accessory<br>
4.5 For Customed Chips: Less than 2.5 failure per million<br>
Test Method: See Appendix SA<br>
4.6 Sensor or sensing component supervision system<br>
a) MIL 217-F : less than 2.5 failures per million hours operation<br>
b) Supervision of the predicted failure mode<br>
c) Supervision of sensor drift beyond 5% of the predicted operation range<br>
Installation and Operation Instructions<br>
Document for test<br>
Compatibility
CONSTRUCTION
Assembly
General
Remote Access<br>
Sensitivity indicating means<br>
All Products<br>
General
Enclosure
9.1 General <br>
9.2 Metallic Material<br>
9.3 Polymeric meterial<br>
9.3.1 need to comply with UL 746C<br>
9.3.2 Polymeric material used to be attached to or exposed on the outside, shall have the flammability characteristics<br>
9.3.3 Conductive coating to nonmetarial surfaces shall comply with UL746C<br>
9.3.4 A polymeric enclosure for connection to a rigid metallic conduit<br>
9.4 Sensitivity Adjustment<br>
<span>Removal of a snap-on cover to gain access to the sensitivity control is<br>permissible only when no hazardous voltage parts are able to be contacted by the user</span>
<br>
9.5 Supplementary signal feature<br>
be evaluated to the applicable requirements and determined suitable for its intended application<br>
9.6 Sharp edges<br>
needs to round the corner as not to injury user<br>
9.7 Ventilating opening<br>
Ventilating openings request<br>
perforated sheet metal used for expaned metal mesh shall not be less than 0.042 inch in average thickness when zinc coated<br>
conditions to use expanded metal mesh 0.021 inch think, or zinc coated perforated sheet metal 0.024inch<br>
The size of wire forming a screen protecting hazardous-voltage parts shall not be smaller than 16AWG and the screen openings shall not be greater than 1/2 square inch<br>
9.8 Covers<br>
Request for enclosure cover<br>
The request for periodic maintenance remove cover<br>
if not periodic remove cover, should be secured<br>
hinged cover is not required where the only fuse enclosed is intended to provide protection to portions of internal circuits. <br>
hinged cover: No screw, latch or catch/ unhinged cover securely held by screws<br>
9.9 Battery Removal Indicator<br>
request
9.10 Transparent Panel<br>
thickness request for glass cover<br>
other transparent material request<br>
mechanically equivalent to glass<br>
not distort<br>
not become less transparent at the temperature (normal service conditions)<br>
lens, light filter,or similar transparency shall not be diminished by the condition<br>
<span>9.11 Accessibility of uninsulated live parts, film-coated wire, and moving parts</span> <br>
<span>an opening in an enclosure shall have a<br>minor dimension less than 1 inch</span>
<br>
<span>shall not be contacted by the probe(page 24)</span><br>
9.11.2 The request for the probe detect<br>
apply to any depth<br>
e ratated and angel to any position<br>
applied in any possible configuration<br>
9.11.3 using the probe<br>
used to measuring instrument to evaluate the accessibility of opening<br>
not to evaluate the strength of a material<br>
applied with minimum force<br>
the part of enclosure can be removed or opened without tool should be removed or opened<br>
10 Spacing<br>
10.1 Spacing between uninsulated live parts an d the enclosure or dead metal parts and between uninsulated live parts of opposite polarity<br>
10.2 PCBA Clearance A<br>
10.3 PCBA Clearance B<br>
10.4 Pollution degree<br>
10.5 Switching test<br>
11 Corrison Protection<br>
WIRING
12 Permanent Connection<br>
12.1 General<br>
12.2 Field-wiring compartment for hazardous voltage connection<br>
12.3 Field-wiring terminals<br>
12.4 Field-wiring leads<br>
12.5 Grounded supply terminals and leads<br>
12.6 Internal Wiring<br>
13 Servicing Protection<br>
13.1 General<br>
13.2 Trained service personal<br>
Performance
14 General<br>
15 Sensitivity requirements<br>
15.1 The requirements to the sensitivity<br>
a) This standard<br>
b) UL2034<br>
c) UL1484 , LEL Alarm <= 25%LEL<br>
d) TWA required by NOISH<br>
e) ANSI ISA 12.13.01 Alarm for signal up to and above LEL<br>
15.2 Special claims should be verified<br>
15.3 Verify each gas for detector<br>
15.4 Verify each gas for sensor<br>
15.5 The use of General-purpose Signaling System that utilizes detectors, sensors or alarms as initiating devices : UL 864, UL 2017<br>
15.6 Calibration <br>
Calibration procedure shall be outlined in Instrument Manual and verified<br>
15.7 Test Equipment<br>
a) Chamber at least 1 cubic foot(0.0283m3)<br>
b) Ambient temperature at 23+/-3 degC or a higher temperature<br>
c) Relative humidity at 50+/- 20 percent<br>
d) Oxygen concentration at 20.9+/-1 percent<br>
e) Supply Voltage, if applicable, adjusted to 100 percent of rated input voltage<br>
15.8 selectivty<br>
15.8.1 Not alarm in the table gas; For residential or commercial applications, cross sensitivity and contaminations and gas concentrations are to be specified.<br>
15.8.2 Calculate test chamber interior volume, calculate test substance necessary<br>
15.8.3 ventilate the chamber for 15min +/- 5 min<br>
15.8.4 add substance by syringe or equivalent device.<br>
15.8.5 remain the device for 2 hours<br>
15.8.6 remove the test atmosphere and maintain clean air for 16hours<br>
then repeat by the next substance<br>
15.8.7 do the sensitivity <br>
16 Sensitivity Requirements<br>
16.1 shall operate for all conditions of its intended performance<br>
16.2 shall consistently alarm at levels within 5 percent of the gas concentration levels<br>
16.3 for multiply stations, the link of the alarms between all the staitions<br>
16.4 test gas or vapor individually as specifed<br>
17 Electrical Supervision Test<br>
17.1 General<br>
17.1.1 Four siturations which the alarm should work in 200 seconds<br>
a) An instantaneous failure or removal of a limited life components<br>
Exception: the alarm power removed<br>
b) An open in an externally connected alarm circuit<br>
c) Electronically or optically detectable failure modes because of aging<br>
d) A ground fault in any externnally connected wiring<br>
17.1.1.1 if drop test effects, then shall comply with 17.1.1 <br>
17.1.2 <br>
Wiring between alarms to a control assembly shall be electrically supervised<br>
An open in the wiring between alarms is not required if the operation as a single station is not prevented<br>
Exception: interconnected wiring of alarms intended to be connected by a Class 1 wiring method<br>
Exceptions: sensor with a failure rate less than 2.5 failure per million hours is not required to be supervised.<br>
17.1.3 For aspired asseblies, the sample draw portion of the system shall be electrically supervised<br>
17.1.4 How to test electrical supervision<br>
17.1.5 the gas alarm or sensor's priority is higher than other fault alarm<br>
17.2 AC Powered units<br>
17.3 Battery powered units<br>
17.3.1 should producing alarm signal for at least 12 hours at the battery voltage; Following the alarm signal , the soure of supply shall be capable of providing 7 days of audible trouble signal indication<br>
?? 7 days<br>
17.3.2 Test 17.3.1 3 sample ; placed in alarm for 12 hours; test 7 days trouble alarm.<br>
17.3.3 in alarm latch mode, when battery is below trouble voltage, the alarm shall transfer to audible trouble<br>
17.3.4 How to test 17.3.3<br>
17.4 Components Failure<br>
Critical, limited life electronic component with no trouble signal, shall use reliable components<br>
17.5 External Wiring<br>
18 Strain Relief Test<br>
18.1 Cord-connected products<br>
18.1.1 define<br>
18.1.2 How to do test<br>
18.1.3 Exceptions for constructed or molded polymeric meterial, additional test<br>
18.2 Filed-connected leads<br>
18.2.1 Request to field-connected leads<br>
18.2.2 Exception for ploymeric meterial<br>
19 Circuit Measurement Test<br>
19.1 Current Input<br>
Except for battery operated device, input current limit (10% of rating)<br>
19.2 Battery trouble voltage determination<br>
19.2.1 <span></span> <br>
<span>An increase in the internal resistance, or a decrease in terminal voltage, of a battery employed as<br>the primary source of power to an alarm shall not impair operation of an alarm signal before a trouble<br>signal is obtained</span>
Additional , See Battery Test , Section 46<br>
19.2.2 trouble level of battery operated alarm shall be determined for <br>
a) rated battery voltage<br>
b) Trouble level voltage<br>
c) voltage between rated and troulbe level voltage<br>
20 Electric Shock Current Test<br>
20.1 Exposed open circuit exceeds 42.4V should comply with 20.2 &20.4<br>
20.2 continuous current flow through a 500-ohm resistor shall not exceed the values specified in Table<br>
20.3
20.4 The capacitance value limit table<br>
20.5 ??<br>
20.6 ??<br>
20.7 Scope: all current, including capacitively coupled currents<br>
20.8 <br>
21 OverVoltage Test<br>
21.1
22 UnderVoltage Test<br>
23 Drop Test<br>
24 Dust Test<br>
25 Static Discharge Test<br>
26 Replacement Test , Head and Cover<br>
27 Jarring Test<br>
28 Flooding with Undiluted Gas Test<br>
29 Variable Ambient Temperature Test<br>
30 Humidity Test<br>
31 Leakage Current Test<br>
32 Transient Tests<br>
33 Stability Test<br>
34 Temperature Test<br>
35 Abnormal Operation Test<br>
36 Overload Test<br>
37 Endurance Test<br>
38 Burnout Test<br>
39 Power Supply Tests<br>
40 Tests of Thermoplastic Materials<br>
41 Class 2 and Class 3 Power-Limited Circuits Test<br>
42 Dielectic Voltage-Withstand Tests<br>
43 Dielectic Voltage-Withstand Tests in lieu of measuring clearance<br>
44 Mechanical Strength Tests for Metal Enclosures and Guards<br>
45 Corrosion Tests<br>
46 Vibration Tests<br>
47 Battery Tests<br>
48 Audibility Test<br>
49 Field Service Tests<br>
Making and Instructions<br>
50 Marking<br>
51 Installation Wiring Diagram<br>
Manufacturing and Production Tests<br>
52 General<br>
53 Sensitivity Calibration Tests<br>
54 Measurement of In-Service Reliability<br>
55 Production Line Dielectic Voltage-Withstand Tests<br>
56 Production Line Grounding Continuity Tests<br>
57 Audibility Test<br>
58 Alarm Shipment<br>
