Friedrich Leutert GmbH & Co. KG
5
Engine Indicator S1 - Operating instructions
A piston of 1/1 with cylinder and the corresponding spring (see spring
table) permits the recording of pressures up to 100 bar. Therefore, a
change of piston is rarely required for this indicator when taking ordinary
engine diagrams, contrary to the instruments applying a helical spring.
When using a piston and cylinder of 1/2, pressures up to max. 200 bar
can be recorded. For precision measurements within the absolute
pressure range of approx. 1 bar, for example for taking partial diagrams
of the suction and exhaust stroke, the indicator can be equipped with a
2/1 piston and cylinder (refer to section „Indicator spring“).
The pressure range from 200 bar up to 2000 bar can be covered by our
indicator type S1.
Technical specifications
Measuring range
: see spring table below
Engine sizes
: up to n = 2,000 rpm or
max. dp/dt = 32 x 10³ bar/sec
Max. diagram
: 25 mm / 60 mm (height / length)
Drum diameter
: 30 mm
Paper size
: 115 mm x 35 mm
Dimensions
: 140 mm x 150 mm x 100 mm
Weight
: 2.6 kg (without wooden box)
6.0 kg (with wooden box)
Natural frequency/sec : (340/
f) + 40 (f = measuring scale)
Standard connection
: W27 x 23.75 dia 10 tpi (W1-1/16”)
Table of Indicator Springs Type S1
P
is
to
n s
iz
e
Ø m
m
Part-No.
4631.0.71.
01
00
0
02
00
0
03
00
0
04
00
0
05
00
0
06
00
0
07
00
0
08
00
0
09
00
0
10
00
0
11
00
0
Spring-No.
S / 5 b
ar
S / 1
0 b
ar
S / 1
6 b
ar
S / 2
4 b
ar
S / 3
2 b
ar
S / 4
0 b
ar
S / 5
0 b
ar
S / 6
0 b
ar
S / 7
0 b
ar
S / 8
0 b
ar
S / 1
00 b
ar
1/1
2/1
1/2
1/5
20.27
28.67
14.38
9.06
Scale mm/bar
max. pressure / bar
Scale mm/bar
max. pressure / bar
Scale mm/bar
max. pressure / bar
Scale mm/bar
max. pressure / bar
3.5
6
7
3
1.75
12
0.7
30
2
10
4
5
1
20
0.4
50
1.25
16
2.5
8
0.625
32
0.25
80
1
24
2
12
0.5
48
0.2
120
0.75
32
1.5
16
0.375
64
0.15
160
0.6
40
1.2
20
0.3
80
0.12
200
0.5
50
1
25
0.25
100
0.1
250
0.4
60
0.8
30
0.2
120
0.08
300
0.35
70
0.7
35
0.175
140
0.07
350
0.3
80
0.6
40
0.15
160
0.06
400
0.25
100
0.5
50
0.12
200
0.05
500
