Engine Indicator Type 30
System Maihak
Engine Indicator
The mechanical pressure indicator type 30 measures dynamic
pressures. It is designed to analyze and adjust 2- and 4- stroke
large diesel engines.
Description Features
Leutert Engine Indicators are used on diesel engines, • Minimum reciprocating mass.
steam engines, gas engines, air compressors, pumps, • Pressure springs are double-coiled. They operate in
etc. A metal stylus draws a clear pressure-path tension.
diagram which records the pressure curve within the • Piston, cylinders and springs are detachable and
engine cylinders as influenced by the piston stroke. interchangeable.
The recording drum can be moved by means of a • Easy to handle, simple to operate.
string, which is pulled manually or by the engine. If • Rugged design
the drum is driven by the engine, the diagram may be
planimetered.
Technical specifications
Our indicators are designed to cover various ranges
of speed and rates of pressure-change: For high Measuring range : see spring table below
pressure-change rates use type 30. For low Engine sizes : up to n = 1,000 rpm or
pressure-change rates type 50 should be used and max. dp/dt = 18 x 10³ bar/sec
for extra high pressure-change rates use type S1 Max. diagram : 30 mm / 60 mm (height / length)
(barspring). Drum diameter : 40 mm
Paper size : 145 mm x 45 mm
It will always be advisable to operate with small Dimensions : 120 mm x 105 mm x 85 mm
diagrams as far as possible, in consideration of the Weight : 1.1 kg without wooden box
oscillating masses. In doubtful cases it is suggested to 4.0 kg with wooden box
forward particulars of the operating conditions, and Natural frequency/sec : 320/f (f = measuring scale)
on orders to give particulars regarding kind of engine, Standard connection : W27 x 23.75 dia 10 tpi (W1-1/16”)
pressures to be measured, engine stroke and r.p.m.
The selection of the correct indicator size depends not Standard accessories
only on the r.p.m but also on the rate of pressure rise
at time unit dp/dt. If the above stated limit values are 1 wooden box, 1 spring, 1 measuring scale, 1 block
exceeded, the resulting acceleration would cause too indicator paper each 40 sheets, 1 cord tightening
high an indication of pressure. Size of piston and spring hook, 1 oil can for piston and links, 2 screw drivers,
are selected such that the maximum natural frequency 1 flat plier, 1 cylinder spanner, 1 hollow spanner,
is attained. With regard to the accelerations, for best 1 cylinder cleaner, 1 stand for instrument, 1 bundle
results the diagram length should be progressively indicator cord, 1 tube incl. 5 recording pencils,
reduced as the r.p.m. approaches the designed 1 vacuum washer 1 mm, 1 vacuum washer 0.5 mm,
maximum of the indicator. 1 instruction manual
Table of Indicator Springs Type 30
Piston Scale Max. Pressure Spring-No. Part-No.
1/5 0.30 mm/bar 100 bar 30 / 20 bar 4611.0.71.12000
1/5 0.24 mm/bar 125 bar 30 / 25 bar 4611.0.71.13000
1/5 0.20 mm/bar 150 bar 30 / 30 bar 4611.0.71.14000
1/5 0.18 mm/bar 175 bar 30 / 35 bar 4611.0.71.15000
1/5 0.16 mm/bar 200 bar 30 / 40 bar 4611.0.71.16000
1/5 0.12 mm/bar 250 bar 30 / 50 bar 4611.0.71.17000
1/10 0.10 mm/bar 300 bar 30 / 30 bar 4611.0.71.14000
1/10 0.09 mm/bar 350 bar 30 / 35 bar 4611.0.71.15000
1/10 0.08 mm/bar 400 bar 30 / 40 bar 4611.0.71.16000
1/10 0.06 mm/bar 500 bar 30 / 50 bar 4611.0.71.17000
Type 30 complete in wooden box Piston diameter 1/5 = 9.06 mm; Piston diameter 1/10 = 6.41 mm
Subject to change without notice 03/2010
2 Engine Indicator Type 30
