درباره ما
MIL-V-23151B
VOLTMETER, EXPANDED SCALE SWITCHBOARD TYPE (NAVAL SHIPBOARD USE)
Year: 1967
Abstract: This specification covers high accuracy, shockproof switchboard mounted, expanded scale voltmeters. ![CHART]()
The type designation of voltmeters shall be in the following form, and as specified (see table II and 6.2):![CHART]()
Voltmeters covered by this specification shall be designated by the two letter symbol "MR".
The style shall be designated by a two digit number which signifies the following characteristics:
The first digit shall designate the nominal size and shape of flange as follows:
3 - 3-½-inch round flange, sealed.
4 - 4-½-inch rectangular flange.
The second digit shall designate the type of mounting and the nominal size of length in angular degrees, as follows:
9 flush mounting, 250 degree nominal scale.
The color scheme of the dial background, markings, and pointer shall be designated by a single letter as follows:
W - White dial background, black markings and pointer.
The center-scale value shall be designated by three digits for the scale ranges covered by this specification as follows:
Two letters shall designate the kind of current for which the meter is designed as follows:
AF - Alternating current (ac) 400 cycle per second (cps) nominal frequency.
A single letter shall designate the shockproof feature as follows:
H - High-impact shock resistant.
The type designation MR39W115AFH signifies the following:
(a) MR - voltmeter electrical indicating.
(b) 39 - 3-½ inch round flange sealed flush mounting 250 degree nominal scale.
(c) W - White dial background with black markings and black pointer.
(d) 115 - Center-scale value 115 volts, 110 to 120 volt range.
(e) AF - Ac 400 cps.
(f) H - High-impact shockproof. Intended Use: Voltmeters covered by this specification are intended for use in type III regulated 400 cycle power systems.
The type designation of voltmeters shall be in the following form, and as specified (see table II and 6.2):
Voltmeters covered by this specification shall be designated by the two letter symbol "MR".
The style shall be designated by a two digit number which signifies the following characteristics:
The first digit shall designate the nominal size and shape of flange as follows:
3 - 3-½-inch round flange, sealed.
4 - 4-½-inch rectangular flange.
The second digit shall designate the type of mounting and the nominal size of length in angular degrees, as follows:
9 flush mounting, 250 degree nominal scale.
The color scheme of the dial background, markings, and pointer shall be designated by a single letter as follows:
W - White dial background, black markings and pointer.
The center-scale value shall be designated by three digits for the scale ranges covered by this specification as follows:
Two letters shall designate the kind of current for which the meter is designed as follows:
AF - Alternating current (ac) 400 cycle per second (cps) nominal frequency.
A single letter shall designate the shockproof feature as follows:
H - High-impact shock resistant.
The type designation MR39W115AFH signifies the following:
(a) MR - voltmeter electrical indicating.
(b) 39 - 3-½ inch round flange sealed flush mounting 250 degree nominal scale.
(c) W - White dial background with black markings and black pointer.
(d) 115 - Center-scale value 115 volts, 110 to 120 volt range.
(e) AF - Ac 400 cps.
(f) H - High-impact shockproof. Intended Use: Voltmeters covered by this specification are intended for use in type III regulated 400 cycle power systems.
Collections
: