barfield 1811D Series, User Instruction Manual, Page: 64 / 64

Engineering Specification
Title: Vertical Speed Indicator, Ground Support
Equipment
Barfield, Inc
4101 NW 29 Street
Miami Florida 33142
Drawing No: 23 ‐ 337 ‐ 00025 Page 4 of 4
TABLE 1
SCALE ERROR TOLERANCE
TYPES I AND II
(Ranges: 0-2,000 and 0-3,000 feet per minute)
Test Rate Ascent and Descent
Feet Per Minute
Tolerance
Feet Per Minute
500 35
1,000 75
1,500** 150
2,000 250
1,500** 200
2,000 250
1,500** 200
2,000 250
** Maximum test point for Type I.
SCALE ERROR TOLERANCE
TYPES III AND IV
(Ranges: 0-4,000 and 0-6,000 feet per minute)
Test Rate Ascent and Descent
Feet Per Minute
Tolerance
Feet Per Minute
500 100
1,000 200
2,000 300
3,000** 300
4,000 400
5,000 500
2,000** 300
4,000 400
2,000** 300
4,000 400
** Maximum test point for Type III.