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Miniature
BITE Indicators
Latching Type
Qualified to MIL-PRF-83287/3
BHG (Single Coil) Family
BHGD (Dual Coil) Family
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Our patented latching
feature assures fast positive response to a fault signal.
The display ball changes color only when the indicator
coil is pulsed by a BITE (Built-In Test Equipment) system.
Our magnetic indicators have no bearings, springs or
filaments to wear out and offer excellent visibility
in high ambient light.
Covered by U.S.
and Foreign Patents.
Cleared by DOD/OFOISR for public release under 00-S-1235
dated April 17, 2000.
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Magnetic Latching |
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High Visibility |
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Small, Lightweight |
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Ultra Reliable |
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OPERATION
When the indicator coil is energized with a 40 millisecond
(or longer) pulse, the highly visible, two-color display
ball spins 180 degrees and latches to the magnetic core.
The displayed ball will remain magnetically latched
to the core in the position last pulsed. Even if the
fault signal is removed, the indicator will "remember"
that a fault has occurred.
Return to "No-Fault"
color is accomplished electrically. Model BHG (single
coil) is reset by reversing polarity of input signal
to the coil. Model BHGD (dual coil) is reset by pulsing
a separate internal coil.
Optional features include
insulated lead wire termination, special lenses (radius
dome, cylindrical, non-glare), O-ring panel seal, internally
mounted diodes and RFI panel shield. Consult the factory
for details.
Care should be taken
in the application of the device as it is subject to
magnetic interference from other devices that may emit
magnetic fields.
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| Standard
Coil Voltages and Resistances |
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Nominal
Voltage DC
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Operating Voltage
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DC Coil Resistance
in Ohms
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Min
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Max
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1.5
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1.25
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1.75
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3.1-3.8
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3.0
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2.5
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3.5
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12-15.2
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5.0
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4.5
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5.5
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34-42
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6.0
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5.5
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6.5
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49-61
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12.0
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9.0
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15.0
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199-242
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24.0
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17.0
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27.0
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792-968
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28.0
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20.0
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30.0
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1080-1320
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Nominal Pulse Power: 650 milliwatts.
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Operating Pulse Length: will
operate at 40 milliseconds or greater.
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Dielectric Withstanding Voltage:
500 VAC RMS case-to-terminals;
500
VAC RMS coil-to-coil (BHGD style).
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Insulation Resistance:
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Mil
Spec:
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Per MIL-PRF-83287
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Non
Mil Spec:
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100 megohms at 500 VDC
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| Case:
Aluminum, black anodized with sealed glass window. |
| Mounting:
Front panel threaded, rear panel threaded, and press
fit sleeve. |
| Weight: |
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Models
BHG 21, BHG 21T, BHG 27T |
2.5
Grams |
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Models
BHGD 21, BHGD 21T, BHGD 27T, BHG 37T |
3.0
Grams |
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Model
BHGD 37T |
4.0
Grams |
| Display
Colors: Any combination of: Red (R),
White (W), Black (BLK), Green (G), Yellow (Y), or
Orange (O). |
| Mounting
Hardware: Lock-washer, internal tooth bronze,
Nylon mounting sleeve. Hex nuts are black anodized
aluminum. Body diameter on all MIL qualified units
is .275 in. max.(7,00mm). |
| Display
Area: all units measure .200 (5,08) diameter,
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| Operating
Temperature Range: -65°C to +125°C. |
| Vibration*:
Sinusoidal:.06" D.A. or 20 G Peak, whichever is
less, 10Hz to 2 KHz, MIL STD 202, Method 204, Test
Condition D. * (During vibration
testing caution should be taken to shield the indicator
from the strong magnetic field.) |
Random
Vibration: 11.6 G's, MIL STD 202,
Method 214, Test Condition D, Curve I. |
| Shock:
100 G's MIL STD 202, Method 213, Test Condition
I. |
| Moisture
Resistance: (Humidity): MIL STD 202, Method
106. |
| Barometric
Pressure : 100,000 ft., MIL STD 202, Method
105, Test Condition D. |
| Thermal
Shock: MIL STD 202, Method 107, Test Condition
B. |
| Salt
Spray: MIL STD 202, Method 101, Test Condition
B. |
| Immersion:
3 ft. head of water for two minutes. |
| Life:
1,000,000 cycles at cycling rate of 10 per minute.
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When ordering, show model number
first, coil voltage and the color combination desired.
If this is a special part, a factory modification number
will be added at the end of the ordering number.
Example:
Single coil model with front panel threaded case for
12 volts with white as set color and black as reset
color would be Model BHG21T12W/BLK.
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BHG21T
- 12 - W
/ BLK - S
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Basic
Model
Number
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Coil
Voltage
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Fault
or Set
Color
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No
Fault or Reset
Color
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Factory
Modification
Number if Special
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BHG
21
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1.5
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R
Red
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R
Red
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S.+
ID No.
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BHG
21T
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3
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W
White
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W
White
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BHG
27T
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5
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BLK
Black
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BLK
Black
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BHG
37T
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6
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G Green
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G
Green
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BHGD
21
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12
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Y
Yellow
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Y
Yellow
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BHGD
21T
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24
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O
Orange
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O
Orange
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| BHGD
27T |
28 |
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MIL-SPEC NUMBER
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EDI Catalog Number
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M83287/3-01
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BHGD21T-3-W/BLK
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M83287/3-02
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BHGD21T-6-W/BLK
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M83287/3-03
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BHGD21T-12-W/BLK
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M83287/3-04
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BHGD21T-24-W/BLK
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M83287/3-05
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BHGD21T-28-W/BLK
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M83287/3-06
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BHG21T-3-W/BLK
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M83287/3-07
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BHG21T-6-W/BLK
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M83287/3-08
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BHG21T-12-W/BLK
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M83287/3-09
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BHG21T-24-W/BLK
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M83287/3-10
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BHG21T-28-W/BLK
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M83287/3-11
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BHGD27T-3-W/BLK
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M83287/3-12
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BHGD27T-6-W/BLK
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M83287/3-13
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BHGD27T-12-W/BLK
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M83287/3-14
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BHGD27T-24-W/BLK
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M83287/3-15
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BHGD27T-28-W/BLK
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M83287/3-16
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BHG27T-3-W/BLK
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M83287/3-17
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BHG27T-6-W/BLK
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M83287/3-18
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BHG27T-12-W/BLK
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M83287/3-19
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BHG27T-24-W/BLK
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M83287/3-20
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BHG27T-28-W/BLK
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M83287/3-21
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BHG21T-5-W/BLK
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M83287/3-22
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BHGD21T-5-W/BLK
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M83287/3-23
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BHG27T-5-W/BLK
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M83287/3-24
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BHGD27T-5-W/BLK
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Recommended cut-out size is .315 dia.
NOTE: Dim. in ( ) are
mm.Tolerances:Decimals: ± .010 (0,25) Fractions:± 1/64
All mounting hardware is black anodized aluminum. Mounting
Torque: 5-7 in. lbs.
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