Rosemount TankRadar Rex Commissioning Owner's manual

Brand: Rosemount

Model: TankRadar Rex Commissioning

Type: Owner's manual

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

www.rosemount-tg.com

Commissioning Manual

Product Discontinued

www.rosemount-tg.com

Commissioning manual

Second edition

Revision B

Rosemount Tank Radar AB

www.rosemount-tg.com

Rosemount Tank Radar AB

The contents, descriptions and specifications within this manual is

subject to change without notice. Rosemount Tank Radar AB accepts no

responsibility for any errors that may appear in this manual.

Trademarks

Rosemount, and the Rosemount logotype are registered trademarks of

Rosemount Inc.

TankRadar is a registered trademark of Rosemount Tank Radar AB.

HART is a registered trademark of HART Communication Foundation

Spare Parts

Any substitution of non-recognized spare parts may jeopardize safety.

Repair, e.g. substitution of components etc., may also jeopardize safety

and is under no circumstances allowed.

Rosemount Tank Radar AB will not take any responsibility for faults,

accidents, etc. caused by non-recognized spare parts or any repair

which is not made by Rosemount Tank Radar AB.

Specific FCC Requirements (USA only)

Rosemount TankRadar Rex generates and uses radio frequency energy.

If it is not installed and used properly, that is, in strict accordance with the

manufacturer´s instructions, it may violate FCC regulations on radio

frequency emission.

Rosemount TankRadar Rex has been FCC certified under test

conditions which assume a metallic tank. Installation on a non-metallic

tank is not certified, and is not allowed.

The FCC certificate for Rosemount TankRadar Rex requires that the

tank is closed as far as emitted radio energy is concerned. Tanks with

open manholes, external-floating-roof tanks without still-pipes etc. are

not covered by the certificate.

TOC-1

Rosemount TankRadar Rex

Table of Contents

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

Contents

1. CHECKS AND ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . 1-1

1.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2 PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.3 TANK INTERIOR CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.4 SYSTEM COMPOSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.5 FCU CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.5.1 FCU information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.5.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.5.3 Electrical check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.5.4 Field bus check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.5.5 Group bus check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.5.6 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.6 FBM 2180 CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.6.1 FBM information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.6.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.6.3 Field bus check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.6.4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.7 COMMUNICATION OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

1.8 RTG 3900 - GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . .1-6

1.8.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

1.8.2 Electrical check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

1.8.3 Tank measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

1.9 RTG 3920 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

1.9.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

1.9.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

1.9.3 Tank measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

1.9.4 Free space requirements . . . . . . . . . . . . . . . . . . . . . . . . .1-8

1.10 RTG 3930 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

1.10.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

1.10.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

1.10.3 Tank measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

1.10.4 Free space requirements . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Rosemount TankRadar Rex

Table of Contents

TOC-2

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.11 RTG 3950 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

1.11.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

1.11.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12

1.11.3 Still-Pipe Requirements . . . . . . . . . . . . . . . . . . . . . . . . .1-13

1.11.4 Free space requirements . . . . . . . . . . . . . . . . . . . . . . . .1-13

1.12 RTG 3960 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

1.12.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

1.12.2 Visual check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16

1.12.3 Still-Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16

1.12.4 Verification Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17

1.13 REX CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19

1.13.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19

1.13.2 Tank Distances and RTG Geometry . . . . . . . . . . . . . . . .1-19

1.13.3 Rex configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20

1.13.4 Input Register parameters . . . . . . . . . . . . . . . . . . . . . . .1-21

1.13.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22

1.14 DATA ACQUISITION UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.2 Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.3 Cable and Junction box . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.4 Electrical check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.5 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-23

1.14.6 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.15 DAU CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.15.1 Tank Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.15.2 Temperature Check . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.15.3 Current inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.15.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-24

1.16 OPERATOR SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-25

1.16.1 TankMaster WinOpi . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-25

1.16.2 Back-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-25

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .INDEX-1

1-1

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1. Checks and Adjustments

1.1 General

Commissioning a Rex system aims at checking the mechanical and

electrical installations.

It includes calibrations and adjustments in order to achieve high

accuracy and reliability. The communication between various TRL/2 and

Rex units is checked, and necessary backups of database files etc. are

created. It also includes checking that the installations are done

according to safety regulations.

This manual provides brief descriptions of most of the items in the Check

List for Rosemount TankRadar Rex. The checklist is used as a guide

when commissioning a Rex system. When you need more information

on a certain item in the check list, read the corresponding section in this

chapter for further information.

Note! Before commissioning a Rex system, always read the Rex Installation

Manual (Document No. 308014), Rex Special Safety Instruction

(Document No. 308016), and Rex Safety Manual (SIL2; Document No.

308020).

1.2 Preparations

Check that the equipment is undamaged and that it corresponds to the

specifications. Note the following information:

• Delivery no. the system number provided by the project depart-

ment at Emerson Process Management/Rosemount Tank

Gauging.

• Name and location of plant.

• Service agency: the name of the local agency responsible for the

installation.

• Engineer responsible for the commissioning, and the date when

commissioning was concluded.

• Note the tank distances needed for installation and configuration

of the Rosemount Tank Radar Rex system. See “Tank measure-

ments” on page 1-8 for illustrations of the different tank distances.

• Note the addresses to be used for the communication between the

connected devices (RTG, DAU, FCU) and TankMaster.

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-2

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

• Check that the correct hardware parts are installed.

• Make sure that you bring appropriate tools and instruments.

• Install TankMaster.

1.3 Tank Interior Conditions

Look for objects which may produce disturbing echoes like girders,

heating coils or agitators. Disturbing objects can severely affect the

accuracy of the measurements.

1.4 System Composition

Enter the following information about the system:

• Number of tanks.

• System Master. There may be several units acting as master at

different occasions. The system is supervised by TankMaster

(WinOpi). A portable service PC may temporarily be connected to

an FCU when system service is required (WinSetup). A host com-

puter can be connected to an FCU or to the TankMaster PC in

order to further process measured data (level, temperature, pres-

sure etc.).

• The number of FCUs, FBMs, RTGs and DAUs.

1.5 FCU checklist

1.5.1 FCU information

Note the name, Unit ID

and address of each FCU.

This will facilitate the

configuration of the Rex

system. Check that the

Unit ID placed at the cover

of the FCU box and on the

FCU motherboard match.

Note the address which

will be used for the

different FCUs.

1.5.2 Visual check

• The FCU is not intrinsically safe. It must therefore be installed in a

nonhazardous area.

• Weather protection: make a note whether the FCU is placed in a

control room or another weather protected location.

Figure 1-1. Position of Unit ID on FCU

cover.

1-3

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.5.3 Electrical check

• Power supply. Check that the switch inside the FCU box is set to

the correct value. 230 V is the default value. If 115 V is used, the

box on the nameplate "Mark box if re-wired for 115 VAC" shall be

marked.

• Grounding: if there is no protective ground in the mains supply

cable, the FCU should be externally grounded via the ground con-

nection at the outside of the FCU box.

1.5.4 Field bus check

• Use a shielded twisted pair cable with an area of at least 0.50 mm

for the TRL/2 bus.

• Shielded cables are required in order to avoid crosstalk if the

cables run alongside and also to avoid other disturbances. The

field bus shield should be connected to ground at the FCU only.

Contact Emerson Process Management/Rosemount Tank

Gauging for further instructions.

• Note the distance if there are two fieldbuses running in parallel.

1.5.5 Group bus check

• Note the number of group buses that are used. The FCU can be

configured with two, three or four group bus ports.

• Note whether the group bus communicates via the RS-232C or

the TRL/2 bus interface. By replacing the FCM board with an FCI

board, RS-485 communication can also be used.

1.5.6 Software

• Note if redundant FCUs are used.

• Note the FCU program version.

To view the FCU program version:

1 Select the FCU icon in the TankMaster WinSetup workspace.

2 Click the right mouse button and choose the Properties option.

3 Select the Communication tab.

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-4

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.6 FBM 2180 checklist

1.6.1 FBM information

• Note the name and version of each FBM.

1.6.2 Visual check

• Note if the FBM is installed outdoors or in the control room.

• Check if there is anything in the surroundings which may disturb

the communication such as electromagnetic fields like radiators,

big motors and transformers.

1.6.3 Field bus check

• Check that the TRL/2 bus is connected to socket 2 and 3. Use

twisted and shielded single pair cable with minimum cross sec-

tional area 0.50 mm

Table 1-1: Recommended wiring length

• Connect the shield to terminal 1 or 4.

• Connect ground cable to terminal 1 or 4.

1.6.4 Power supply

• Do not use external power supply when the modem is connected

to the USB port. The USB interface itself supports power to the

FBM 2180 modem.

Cable dimension Maximum length

AWG 20 (0.50 mm

)

3000 m

AWG 18 (0.75 mm

)

4000 m

Figure 1-2 FBM 2180

TRL/2 bus

1-5

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.7 Communication overview

Make a simple drawing showing all tanks and installed units, see Figure

1-3. Include cable lengths. Describe the composition of tanks, Radar

Tank Gauges, Data Acquisition Units, Field Communication Units, Field

Bus Modems and system master. Try to provide as much detail as

possible. A complete view of the system including TankMaster WinOpi

and host computers should be provided, including information on which

Rex units the host computer is connected to.

Figure 1-3 Example of System Composition drawing.

TankMaster

WinOpi

Plant host

computer

FBM

FCU

Field bus

RTG/

DAU

RTG/

DAU

RTG/

DAU

RTG/

DAU

RTG/

DAU

Portable

Service PC

Tank 1 Tank 2 Tank 3

Tank 4 Tank 5

Tank 6

Tank Group 1

Tank Group 2

Group Bus

(TRL/2 Bus)

RTG/

DAU

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-6

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.8 RTG 3900 - General information

1.8.1 Tank Information

• Tank name

•Product in tank

• Note the Unit ID, see Figure 1-4 It can also be found on the Signal

Processing Card (after C on the label). See TankRadar Rex Instal-

lation Manual Ed. 3 rev.B, chapter 3.1.1 for information on the

Transmitter Head Electronics Card.

Figure 1-4 Label with Unit ID.

1.8.2 Electrical check

• RTG Power Supply: The 3900 Rex transmitter accepts 100-240

VAC, 50-60 Hz and max. 80 W. The built-in Transformer Rectifier

Card (TRC) automatically adapts to the connected supply voltage.

Optional: low voltage AC/DC versions (34-70 VAC/48-99 VDC).

• Grounding: Certain national regulations requires protective

grounding of enclosure, see Special Safety Instruction for further

information. Special Safety Instruction is delivered together with

each Rex transmitter. Check with Emerson Process Management/

Rosemount Tank Gauging and/or local authorities if necessary.

• Field bus continuity: Measure the resistance between leads 3

and 4. Resistance values between 1 and 20 Ω indicate that the

field bus cable is undamaged and correctly connected.

• Field bus shield grounding: Check that the field bus shield is

connected to ground at the FCU only, and not at the RTG.

1-7

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.8.3 Tank measurements

• Tank reference distance, R. The R distance is defined as the dis-

tance between the dipping datum point (zero level) and the tank

reference point.

• RTG reference distance, G. G is the distance between the tank

reference point (hand dip nozzle) and the RTG reference point.

The RTG reference point is underneath the RTG flange, see Fig-

ure 1-5.

• Minimum level distance, C. C is the distance between the dip-

ping datum point (zero level) and the bottom of the tank.

• Note the distance (mm) from max product level to RTG reference

point.

Note! The G value is defined as positive if the Tank Reference point is located

above the RTG Reference point.

Figure 1-5 Tank distances.

Tank Reference Point

RTG Reference Point

Dipping Datum Point

(Zero Level)

Min. Level distance, C

RTG Ref.

distance, G

Tank Reference distance, R

RTG Reference

Point

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-8

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.9 RTG 3920

1.9.1 Tank Information

• Check if there is water at the bottom of the tank.

1.9.2 Visual check

• Free space below the RTG. Normally girders and pipes are not

allowed in the radar beam. If there are disturbing objects below the

antenna, the effect on the current measurement must be carefully

evaluated.

• Check that waveguide, closing and antenna are mounted correctly

and take appropriate actions in order to replace broken parts.

1.9.3 Tank measurements

• Diameter of the manhole and the socket height. The socket

must not be higher than 330 mm.

• Note the distance X (mm) between the tank wall and the center of

the RTG. It will be used for calculations of the clearance angle

below the antenna.

1.9.4 Free space requirements

• Check the Clearance Angle plumbline tankwall (arctan X/R). If

the clearance angle is less than 15°, the RTG must be inclined

away from the wall.

Figure 1-6 Inclination.

Antenna axis

30° radar beam

Vertical plumb line

Inclination 4° ±1°

Antenna axis

30° radar beam

Use the 4° flange if the

clearance angle is less

than 15°.

Vertical plumb

line

1-9

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

• Inclination of RTG. Use

the 4° flange to direct the

radar beam 4° towards

the tank center if the

clearance angle is less

than 15°. For larger

clearance angles, the

gauge should be inclined

0°.

• Sidewise angle:

0 ° ± 1°

(horizontal flange)

4 ° ± 1° (4 ° flange)

Figure 1-7 Clearance angle.

5°

Figure 1-8 Sidewise angle.

Antenna axis

Sidewise angle:

0 ° ± 1° (horizontal flange)

4 ° ± 1° (4 ° flange)

Vertical plumb

line

Free passage

Clearance angle

Antenna axis

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-10

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.10 RTG 3930

1.10.1 Tank Information

• Check if there is water at the bottom of the tank.

1.10.2 Visual check

• Free space below the RTG. Normally girders and pipes are not

allowed in the radar beam. If there are disturbing objects below the

antenna, the effect on the current measurement must be carefully

evaluated.

• Check that waveguide, closing, feeder and parabola are mounted

correctly and take appropriate actions in order to replace broken

parts.

1.10.3 Tank measurements

• Diameter of the manhole and the socket height. If a 20" diame-

ter socket is used, the height of the socket must not exceed 0.6 m.

If the manhole is wider, the height of the socket may be corre-

spondingly higher as long as the requirement of a free passage

within 5° is fulfilled.

• Note the distance X between the tankwall and the center of the

RTG. It will be used for calculations of the clearance angle below

the antenna.

Figure 1-9 RTG 3930.

1-11

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.10.4 Free space requirements

• Check that the guide

pins on the TRL/2

adapter are directed

towards the center of

the tank. See TankRa-

dar Rex Installation

Manual Ed. 3 rev.B,

chapter 10.2.7 Mount-

ing the Antenna.

• Check the Clearance

Angle between plum-

bline and tankwall

(arctan X/R). If the clear-

ance angle is less than

5°, the RTG must be

inclined 1.5° away from

the wall.

• Inclination. The inclina-

tion of the gauge should

not exceed 1.5° towards

the center of the tank.

RTG 3930 is mounted

on the tank nozzle by

using the Flange Ball

which make it easy to

adjust the inclination.

• Sidewise angle max 0.5°. Check that the flange is horizontal

within 3° along the tank wall.

Figure 1-11 Sidewise angle.

Figure 1-10 Inclination and Clear-

ance angle.

Antenna axis

5°

Antenna axis

Sidewise angle

Vertical plumb

line

Free passage

Clearance angle

5°

Inclination 1.5°

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-12

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.11 RTG 3950

1.11.1 Tank Information

• Check if there is water at the bottom of the tank

1.11.2 Visual check

• Check still-pipe (wildings, burrs, amount of rust, dirt and deposits).

• Check that the RTG 3950 is installed according to the instructions

in the TankRadar Rex Installation Manual, chapter 10. Take

appropriate actions in order to replace any broken parts.

Figure 1-12 RTG 3950 Fixed and Inclined version.

1-13

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

1.11.3 Still-Pipe Requirements

• Check the number of holes, distance between the holes (unit

meter) and the hole diameter (unit mm). It is important that the

area of the slots and holes not exceed the specified limits, see

Table 1-2.

• Note the pipe inner diameter. It will be used when the RTG is con-

figured.

• The still-pipe flange must be horizontal within ±2°.

• The still-pipe must be vertical within 0.5° (0.2 m over 20 m).

Note! The topmost hole/slot in the still-pipe must be placed above maximum

product level.

1.11.4 Free space requirements

RTG 3950 Fixed Version

Figure 1-13 Free space requirements RTG 3950 Fixed Version

Pipe Dimension

(inch)

5681012

Max Area of Slots or

Holes (m

)

0,1 0.1 0.4 0.8 1.2

Table 1-2: Maximum area of the slots or holes

620 mm

700 mm

Min. 500 mm

Rosemount TankRadar Rex

Chapter 1 Checks and Adjustments

1-14

Commissioning Manual

308011En, Ed.2/Rev.B

June 2008

RTG 3950 Inclined Version

Figure 1-14 Free space requirements RTG 3950 Inclined Version

Min. 500 mm 510 mm

590 mm

Make sure that there is sufficient

space to open the cover.

Pipe Size (in.) A (mm)

5430

6448

8480

10 518

12 545

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Rosemount TankRadar Rex Commissioning Owner's manual

Rosemount TankRadar Rex Commissioning Owner's manual

Rosemount TankRadar Rex Commissioning Owner's manual

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