MR MESSKO MTO Technical Data Manual

MESSKO® MTO
Oil Level Indicator

Technical data

Messko GmbH 2018 15784996-00 EN MESSKO® MTO

Product variants

This technical document contains detailed information about the technical properties of the product. If you
would like to place an order, please use the MESSKO inquiry and order specification, which you can also
find on our website http://www.reinhausen.com below the respective product.

Limit value switch

Without switch

Non-adjustable 15 A switch (MTO-STF160) max. 3 units

For details, see the micro-switch table, page 3

Adjustable 5 A switch

(MTO-ST160) max. 3 units

For details, see the micro-switch table, page 3

Switching points Standard: 5° before MIN and 5° before MAX; others available

(For adjustable switches: minimum distance >10° between switches)

Scale marks

Standard: MAX...+20°C...MIN

Others available

Scale/shade color Black on white dial face

White on black dial face

Yellow on black dial face

Others available

Electrical connection

Cable screw connection 1 x M25x1.5 1 x M25x1.5 WADI (watertight) available

ANSI plug Cable length available in a variety of lengths

NPT 1/2" internal thread

MIL plug

Optional:

TT30 box with analog output

For details, see the technical data, page 4, and graphics, page 5/6

Analog output 0...1 mA

0...20 mA

4...20 mA (error signal < 3.6 mA)

4...20 mA (error signal > 22 mA)

Digital output RS485 interface with standard ASCII proto-

col available

K1 micro-switch Switching function:

Rising level (NO/NC) or falling level
(NO/NC)

K1 switching point Standard at 20 °C

Others available

Design types

Housing color tone RAL 7033 cement gray

RAL 7038 agate gray

RAL 7032 gravel gray (only for sheet steel housing)

Mounting flange For details, see the technical data, page 3

Standard flange Ø 134 mm [Ø 5.28"], bolt circle Ø 102 mm [Ø 4.02"]

RM* flange Ø 134 mm [Ø 5.28"], bolt circle Ø 101.6 mm [Ø 4.000"]

*) Version for the US market

NAT/DS flange Ø 134 mm [Ø 5.28"], bolt circle Ø 79.38 mm [Ø

3.125"]

Optional Offshore model

1

1

2

3

4

5

6

7

Oil Level Indicator MESSKO® MTO

Messko GmbH 20182 5784996-00 ENMESSKO® MTO

Radial drive type

Angle values of the scale

Standard A = 70° (max.) / B = 15° / C = 70° (max.)

Other intermediate values available

Straight design

Standard projection 59 mm / 100 mm

Max. 350 mm; others available

Angled design

Standard projection 150 mm / 274 mm

Max. 350 mm; others available

Inclination α 15° / 30° / 45° available

Float gauge length Standard 680 mm / 800 mm

Maximum 1000 mm

Can be shortened by the customer

RM* float gauge

*) Version for the US
market

L ≤ 350 mm; brass

(also available for axial)

Axial drive type

Angle values of the scale

Standard A = 70° (max.) / B = 15° / C = 70° (max.)

Other intermediate values available

Axial design

Standard projection A = 69 mm / A = 268 mm

Max. 350 mm; others available

Installation position depending on the conservator tank
layout

Float gauge design

▪ 1 rolling float gauge (L ≤ 1000 mm)

Option 1: Without

breathing sack

For details, see the
graphic, page 11

Option 2: Upright with
breathing sack

For details, see the
graphic, page 12

for option 2, 3 and 4

▪ 2 rolling float gauges (L ≤ 1000 mm)

▪ 4 rolling float gauges (L > 1000 mm, max.

2500 mm; others by request)

Option 3: Angled with
breathing sack

For details, see the
graphic, page 12

Option 4: Slanting from
below with breathing
sack

For details, see the
graphic, page 13

Angled TT30 box

Inclination α = 0° / 15° / 30° / 45° available

For details, see the graphic, page 9

9

8

10

11

12

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 35784996-00 EN MESSKO® MTO

Technical data

Operating conditions MESSKO® MTO®

Setup Indoors and outdoors, tropic-proof

Operating temperature –40 °C...+70 °C; with TT30 signal converter (optional): –25 °C...+70 °C

Storage temperature –50 °C...+80 °C

Min. permitted oil impermea­bility

760 kg/m3 at max. operating temperature

Ventilation Ventilation element in the indicator for the prevention of water condensation

Degree of protection IP 55 in accordance with DIN EN 60 529

General MESSKO® MTO®

Materials

Front ring and housing Sheet steel, galvanized: coated RAL 7032/RAL 7033/RAL 7038; coated

with acrylate resin

Stainless steel: coated RAL 7033/RAL 7038, coated with acrylate resin

Retaining flange Aluminum (AlSi1MgMn)

Viewing glass Laminated safety glass with UV filter

Indicator scale Aluminum-coated, with UV wide format printing and protective paint

Labeling Black font

Upon execution in accordance with DIN 42 569 black indicator scale, yel­low font

MIN...+20°C...MAX; other labeling available

Float rod Aluminum; optional brass for L ≤ 350 mm

Float gauge Rohacell 110, oil-resistant, temperature-resistant up to 160°C

Cable screw connection Nickel-plated brass, M25x1.5

Offshore: 1.4571 stainless steel, M25x1.5

Weight 3.7 kg

Dimensions

Housing scale Ø 173 mm [Ø 6.81"]; height 213 mm [8.39"]; depth 81 mm [3.19"]

Height with TT housing (optional): 322 mm [12.68"]

Flange Standard MTO-ST160 (TT30): Ø 134 mm [Ø 5.28"]; bolt circle Ø 102 mm

[Ø 4.02"] with 4 holes Ø 13 mm [Ø 0.51"]

MTO-STRM standard: Ø 134 mm [Ø 5.28"]; bolt circle Ø 101.6 mm [Ø

4.000"] with 4 holes Ø 11.12 mm [Ø 0.438"]; inner seal groove Ø 66.55 mm
[Ø 2.620"] / outer seal groove Ø 85.85 mm [Ø 3.380"] / depth 3.05 mm
[0.120"]

MTO-STRM NAT/DS: Ø 134 mm [Ø 5.28"]; bolt circle Ø 79.38 mm [Ø

3.125"] with 4 holes Ø 8.73 mm [Ø 0.344"]; inner seal ring Ø 53.98 mm [Ø

2.125"] / outer seal ring Ø 69.85 mm [Ø 2.750"] / depth 1.59 mm [0.063"]

Projection Radial, straight design: 59 mm / 100 mm; max. 350 mm; others available

Radial, angled design (15° / 30° / 45°): 150 mm / 274 mm; max. 350 mm;
others available

Axial: Standard 69 mm / 268 mm; max. 350 mm, others available

Float gauge length Radial: Standard 680 mm / 800 mm; can be shortened by the customer

Axial: 2 rolling float gauges (≤ 1000 mm); 4 rolling float gauges (> 1000
mm)

Connection terminals min. 0.25 mm2 / max. 2.5 mm

2

Micro-switch MESSKO® MTO®

Switching function:

Change-over switch for fill
level

NO: Level rising or falling

NC: Level falling or rising

Contact material Silver alloy (AgNi10)

Gold-plated contacts available if current for switching is limited to 100 mA

Isolation voltage 2.5 kV AC, each individual contact grounded

Up to 3 preset micro-switches, only adjustable ex works: MTO-STF160(G)

Breaking capacity: AC: 250 V / 15 A / cosφ = 1; DC: 250 V / 0.25 A / non­inductive; DC: 12 V / 5 A / non-inductive

Up to 3 freely adjustable micro-switches over scale range: MTO-ST160(G)

For the breaking capacity, see the following table

Oil Level Indicator MESSKO® MTO

Messko GmbH 20184 5784996-00 ENMESSKO® MTO

Switching power (breaking capacity) Utilization category U

N

I

N

For adjustable micro-switches in
accordance with DIN EN
60947-5-1

AC AC-12 230 V 5 A

AC-15 230 V 0.26 A

AC-15 120 V 0.5 A

AC-15 24 V 2 A

DC DC-12 110 V 0.4 A

DC-12 220 V 0.2 A

DC-13 220 V 0.11 A

DC-13 120 V 0.21 A

DC-13 24 V 1.04 A

Technical data TT30 signal converter (optional)

Operating conditions TT30 signal converter

Setup Indoors and outdoors, tropic-proof

Operating temperature –25 °C...70 °C

Storage temperature –50 °C...+80 °C

Ventilation Indirectly via MTO housing

Degree of protection IP 55 in accordance with DIN EN 60 529

Properties TT30 signal converter

Identification MTO-ST(F)160(G)TT

Housing AISi pressure casting; color tone RAL 7033/RAL 7038, coated with acrylate

resin

Weight approx. 700 g

Dimensions L x W x H = 120 x 80 x 60 mm

Cable screw connection 2 x M20x1.5; nickel-plated brass

2 x M20x1.5; 1.4571 stainless steel for offshore applications

Connection terminals min. 0.25 mm2 / max. 2.5 mm

2

Connection parameters TT30 signal converter

Sensor Inductive switch

Supply voltage 24 V DC +/- 15%

Power consumption approx. 80 mA

Isolation voltage 0.5 kV, 50/60 Hz, 1 min.; all contacts grounded

Status display Power ON (1x green LED); K1 main switching contact (1x red LED)

Relay contact 1 x changeover contact (K1 main switching contact)

Breaking capacity 5 A/250 V AC, cosφ=1; 0.3 A/250 V DC / non-inductive

max. load resistance R

L,MAX

= (UB – 7 V) / 20 mA (or / 1 mA)

RL = 850 Ω at UB = 24VDC

Working resistance influ­ence

≦ 0.01% / 100 Ω

Analog output signal, ad­justable ex works; 2 wire
circuit

0...1 mA

0...20 mA (error signal > 22 mA)

4...20 mA (error signal < 3.6 mA)

4...20 mA (error signal > 22 mA)

Digital output signal RS485 interface with standard ASCII protocol available

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 55784996-00 EN MESSKO® MTO

Connection diagram with TT30 signal converter as analog output (optional)

Figure 1: Electrical connection

1 Limit value switch 2 Indicator

3 Front ring with bayonet connector 4 Cover plate (opened from the right)

5 Micro-switch electrical connection 6 TT30 box (only for MTO-TT)

7 Connection for supply voltage (contacts 4, 5) 8 K1 main switching contact relay connection (contacts 1, 2,

3)
– increasing or decreasing NO
– increasing or decreasing NC

9 LED K1 main switching contact – red 10 LED Power – green

11 2 rotary encoder switches for RS485 address (hexadeci-

mal)

12 Optional: RS485 interface (contacts 10, 11, and, if necessa-

ry, contact 9 for the shield)

13 Analog output (contacts 7+, 8–) 14 Grounding the shield (contact 6)

Oil Level Indicator MESSKO® MTO

Messko GmbH 20186 5784996-00 ENMESSKO® MTO

Circuit diagram for remote display (MTO-TT with display device El100 and El100/160)

Figure 2: Circuit diagram for MTO-TT remote display

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 75784996-00 EN MESSKO® MTO

MTO radial dimensions (Standard)

Figure 3: MTO radial, standard

1 Indicator 2 Ventilation

3 Cover plate 4 Connection terminals

5 Projection 6 Bolt length max. 20 mm

7 Lock nut 8 Flange thickness

9 Float gauge 10 M25x1.5 cable screw connection in accordance with EN

60423

11 M20x1.5 cable screw connection in accordance with EN

60423

12 TOP for flange mount

Oil Level Indicator MESSKO® MTO

Messko GmbH 20188 5784996-00 ENMESSKO® MTO

MTO radial dimensions (sloped version with α = 15°/30°/45°)

Figure 4: MTO radial, sloped

1 Projection 150

+ 1

mm 2 Bolt length max. 20 mm

3 Flange thickness 4 Float gauge

5 Lock nut 6 Ventilation

7 Terminal cover 8 M25x1.5 cable screw connection in accordance with EN

60423

9 TOP for flange mount

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 95784996-00 EN MESSKO® MTO

MTO installation dimensions with TT30 box, sloped

Figure 5: MTO sloped installation dimension

1 Float gauge 2 Lock nut

3 Dimensions dependent on inclination α Inclination

Oil Level Indicator MESSKO® MTO

Messko GmbH 201810 5784996-00 ENMESSKO® MTO

MTO axial dimensions

Figure 6: MTO axial installation dimension

1 Indicator 2 Ventilation

3 Connection terminals 4 Float gauge

5 Projection 6 Bolt length max. 20 mm

7 M25x1.5 cable screw connection in accordance with EN

60423

8 4...20 mA output; M20x1.5 cable screw connection in ac-

cordance with EN 60423

9 TOP for flange mount 10 Lock nut

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 115784996-00 EN MESSKO® MTO

Installation positions for axial MTO

Option 1 without breathing sack

Figure 7: Option 1 without breathing sack, with associated float gauge

Oil Level Indicator MESSKO® MTO

Messko GmbH 201812 5784996-00 ENMESSKO® MTO

Axial MTO, option 2 and 3, with breathing sack*

Figure 8: Option 2 with upright installation; Option 3 with angled installation; float gauge see also option 4

Oil Level Indicator MESSKO® MTO

Messko GmbH 2018 135784996-00 EN MESSKO® MTO

Axial MTO, option 4, with breathing sack* and float gauge

Figure 9: Option 4 with installation sloping from below; float gauge for options 2, 3, 4

Oil Level Indicator MESSKO® MTO

Messko GmbH 201814 5784996-00 ENMESSKO® MTO

Further types of float gauges

Figure 10: Types of float gauges

1 RM float gauge (Rod: brass) MTO-ST160RM For radial and axial

2 Cubic float gauge (Rod: aluminum) MTO-ST160 For radial

3 Cylindrical float gauge (Rod: aluminum) MTO-ST160 (TT) For radial angled 15° / 30° / 45°

Messko GmbH

Gewerbegebiet An den Drei Hasen
Messko-Platz 1
61440 Oberursel, Germany

[phone]
[phone]
[e-mail]

www.reinhausen.com/messko

5784996-00 EN - MESSKO® MTO -

F0355500 - 02/18 - Messko GmbH 2018

THE POWER BEHIND POWER.