MIL-DTL-15098E
g. Energize the lamp under test and adjust transformer T on figure 5 so that the specified
design current (see 3.1) flows through the test lamp.
h. Allow approximately 1 minute for the lamp under test to stabilize, then record light
output indicated by voltmeter V1 on figure 3.
4.6.6.1 Recalibration of test equipment. After measuring five test lamps, the photometer
shall be recalibrated as before and corrected for drift. Recalibration shall be performed with the
same three calibration lamps.
4.6.7 Leakage resistance (see 3.13). The lamp and specified series resistor in the test
circuit (see figure 1) shall be connected with an ammeter or galvanometer of suitable range. V2
shall be open-circuited. R1 shall be adjusted to apply 45 ±1 volts to V1. V1 and A shall be
recorded. The leakage resistance shall be computed as:
V1
RL =
- R2
A
Unless R2 is in the lamp base, it may be omitted from the circuit when this test is
conducted.
4.6.8 Vibration (see 3.14). The glow lamps shall be subjected to the vibration test,
method 204 of MIL-STD-202. The following details shall apply:
a. Mounting - As specified in 4.5.8.
b. Test condition - C.
4.6.9 Shock (see 3.15). Lamps shall be tested in accordance with 4.6.9.1 or 4.6.9.2, as
specified (see 3.1).
4.6.9.1 Method I. Lamps shall be tested in accordance with method 207 of
MIL-STD-202. The following details apply:
a. Mounting fixture - In accordance with method 207 of MIL-STD-202.
b. Electrical load - Not applicable.
4.6.9.2 Method II. Lamps shall be tested in accordance with method 213 of
MIL-STD-202. The following details shall apply:
a. Mounting - See 4.5.8.
b. Test condition - C.
4.6.10 Life (see 3.16). The glow lamp with specified series resistor shall be operated at
the specified test current (see 3.1, 4.6.3, and 4.6.4) until the end of useful life (see 4.6.10.1) is
reached. Life testing shall be interrupted once per day. Circuit components shall be tested on
DC and correct polarity shall be observed when testing lamps which have polarity indicated
(see 3.18). Indicator lamps shall be tested on AC.
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