General The MKR181A Dual channel recorder consist of the

intelligent μR20000 recorder containing a microprocessor,

which has been modified for installation on a ship. The

instrument accepts heading and rudder angle signals

consisting of voltage signals between 0V to 5V DC. It

continuously records heading, quadrant and rudder angle

using pens, and also periodically prints the date, time, kind of

recording, unit, paper feed speed, recording color, and so on.

Features 1) The instrument has periodic printing and list printing

functions

2) It has both analog and digital display functions.

3) The feed speed of the recording paper can be

selected.

(25mm/h or 250mm/h)

4) This is useful for when evaluating and analyzing

steering performance during a voyage.

5) The pens can be replaced easily.

Specifications

- Input section

Heading input : 0V to 5V DC (full span 90 deg.)

000° to 90° ----------------- 0V to 5V DC

090° to 180° ----------------- 5V to 0V DC

180° to 270° ----------------- 0V to 5V DC

270° to 000° ----------------- 5V to 0V DC

Quadrant input : 1.25V to 5V DC

First quadrant --------------- 1.25V DC

Second quadrant ----------- 2.50V DC

Third quadrant --------------- 3.75V DC

Fourth quadrant ------------- 5.00V DC

Rudder angle input : 0V to 5V DC

PORT 40° --------------------- 0V

MIDSHIP ---------------------- 2.5V

STBD 40° --------------------- 5.0V

- Recording section

Accuracy :±1.2° of heading, ±1.2° or less

Dead band : Heading 0.2°, Rudder angle 0.2°

Recording method : Disposable felt pens

Measurement interval : 125ms (each channel)

Recording paper : 180mm width, total length 20m, Z-fold

Recording paper feed speed : NOR --- 25mm/h

FAST -- 250mm/h

Duration of recording paper :

About 1 month (when “NOR” speed is used)

Recording color : Heading -- blue, Quadrant -- red

Rudder -- green

Illumination : Internal light provided

- Display section

Display method : VFD (181 X 16dot matrix, 20 digits)

Digital display : Date in the dominical year and time

Analog indication : Bar-graph indicate of Heading, Quadrant

and rudder angle

- Printing section

Time tick ( _ ), date (year, month), and time (hours,

minutes), recording paper feed speed, tag names,

measurement values, units and recording colors are

printed on the left hand side.

- Performance and characteristics

Insulation resistance :

Between each terminal and ground :20MΩ or higher

(at 500V DC)

Dielectric strength:

Between each power supply terminal and grand :

1500V AC (50Hz/60Hz), 1 min

Between each measuring input terminal and grand :

1000V AC (50Hz/60Hz), 1min

Between measuring input terminals:

1000V AC (50/60Hz), 1min

Between each remote control terminal and ground :

500V DC, 1min

- Construction

Installation method :

Flash mount type & Wall mount type…Vertical mounting .

(The instrument may be inclined up to 30° to the rear ).

Horizontal in left-right direction.

Material : Case ・・・・・・・ Steel

Front door ・・・ Aluminum casting

Bezel ・・・・・・・ Steel

Dimensions : Flash mount ・・ 374(W) X 430(H) X 248(D)

Wall mount ・・・ 374(W) X 430(H) X 270(D)

Weight : Flash mount 12kg, Wall mount 22kg

MKR181A Dual channel recorder

General Specification

GS 80B12R07E 1st

MKR181A

Dual channel recorder

GS80B12R07E 2007.08 1st （YDK）

(Can be turned on or off using LIGHT switch.)

2

Yokogawa Denshikiki Co.,Ltd.

GS80B12R07E 1st 2007-08

Paint color : Munsell No.

Recorder : Front door frame

(LAMP BLACK 10B3.6/0.3)

Bezel : Selectable by following

0.8Y2.5/0.4 (LAMP BLACK)

2.5G7/2

7.5BG7/2

- Power supply section

Rated power supply voltage :

100AC to 240V AC

(automatic voltage range selection AC model)

24V DC (DC model)

Usable power supply voltage :

90V AC to 132V AC, 180V AC to 264V AC (AC model)

21.6V to 26.4V DC (DC model)

Rated power frequency : 50Hz/60Hz, Switching unnecessary

(Not applicable DC model)

Power consumption:

For power supply of 100V AC : Approx 17VA (55VA max.)

For power supply of 240V AC : Approx 25VA (55VA max.)

For power supply of 24V DC : Approx 70VA (Maximum)

- Normal operation conditions

Power supply voltage :

90V AC to 132 V AC, 180V AC to 264V AC (AC model)

21.6V DC to 26.4V DC (DC model)

Power frequency :

50Hz ± 2%, 60Hz ± 2% (Not applicable DC model)

Ambient temperature : 0 to 50

Ambient humidity : 20% to 80% (at 5 to 40)

Vibration : 10Hz to 60 Hz 0.2 m/s2 or less

Magnetic field : 400A/m or less (DC and 50Hz/60Hz)

Noise : Normal mode (50/60Hz)

The Peak value including signal must be less than

1.2 times the rated value of the range

Common mode (50/60Hz)

250VACrms or less for all ranges

Warm-up time :

At last 30 minutes after power on

- Effect of operation conditions

Effect of ambient temperature :

With temperature variation of 10:

Measurement ・・・ ±(0.1 % of rdg + digit) or less

Recording・・・・・・Measurement fluctuation + ±0.2 % of

the recording span or less

Effect of power supply voltage :

Effect of variation in rated power supply voltage (Over the

range 90V AC to 132V AC or 180V AC to 264V AC for the

AC model)

Measurement ・・・ ± 1 digit or less

Recording ・・・・・・ ± 0.1% of the recording span or less

Effect of frequency :

Effect of frequency variation of ±2 Hz from rated power

frequency ( power supply voltage 90 to 132, 180 to 264V

AC)

Measurement ・・・ ±(0.1% of rdg + 1digit) or less

Recording ・・・・・・ same as measurement fluctuation

Effect of magnetic field :

Effect of variation of AC (50Hz/60Hz) or DC 400 A/m magnetic

field

Measurement ・・・± (0.1 % of rdg 10digit) or less

Recording・・・・± 0.5 % of the recording span or less

Effect of signal source resistance :

Effect of signal source resistance variation of +1kΩ

Range of 200 mV or less・・・Within ±10 µV

Range of 2V or more・・・・・・±0.1 % of rdg

Effect of mounting position :

Effect of variation of up to 30° the rear

Measurement ・・・ ±(0.1% of rdg + 1digit)or less

Recording ・・・・・・ Indication fluctuation + ±0.1% of the

recoding span or less

Effect of vibration:

Effect when a sinusoidal vibration along all three axis at a

frequency between 10 to 60 Hz and an

acceleration of 0.2 m/s2 is applied for 2 hours

Measurement ・・・ ±(0.1% of rdg + 1digit) or less

Recording ・・・・・・ Indication fluctuation + ±0.1 % of the

recording span or less

- Misc

Clock : With a calendar function

Accuracy of clock : ±100 ppm, excluding a delay (of 1

second, maximum) caused each time the power is

turned on.

Key lock function : Password for releasing the key lock can be

set.

Internal light : Lights up the recording area of the chart paper.

Uses a dedicated LED.

Memory backup : A built-in lithium battery backs up the setup

parameters and runs the clock.

Battery life: approximately 10 years.

When the battery runs down, an indication appears on the front

of the instrument.

- Transportation and storage conditions

Ambient temperature: -25 to +60

Ambient Humidity : 5% to 95% RH (no condensation)

Vibration : 10Hz to 60Hz、4.9m/s2

3

Yokogawa Denshikiki Co.,Ltd.

GS80B12R07E 1st 2007-08

Type No. Suffix code

Outline

MKR181A-F (Flash mount type)

MKR181A-W (Wall mount type) Printing Example

205

1

430205

1

205

1

386

205

1

POWER SUPPLY

QUADRANT

HEADING

RUDDER ANGLE

TERMINAL CONNECTIONS

M D

MA 22.0 k

MKR181A

274 12- 12 HOLE

374

12

242

270

28

CABLE INLET(20 x 80)

4

TERMINAL BOARD

Color

(Munsell NO.)

Recorder

Bezel 0.8Y2.5/0.4

(Lamp Black)

10B3.6/0.3

(Light charcoal gray)

2.5G7/2

7.5BG7/2

NP

Heading Quadrant Rudder

Subject to alternation to technical developments without notice