raczing user guide (mercury)

8/9/2019 Raczing User Guide (Mercury)

1/26- 1 -

Mercury User Manual - May 2010

SMALLEST IN ITS OWN CLASS ...A break through technology that display real live information through Bluetooth enabled cell-phone

Thank you for purchasing the mercury,

worlds first electronic speed controller (esc) that can

stream measured and calculated current, voltage, rpm,

throttle level, temperature, watt and mah data right to your

cell-phone1. By eliminating awkward wires and bulky display

panel, Mercury is the smallest and lightest in its class, and it

can easily fit into your electrical powered radio control

model.

When within range2, hobbyist can instantly get the critical

electrical parameters hassle free using their bluetooth

enabled java cell-phone, even when they are away from their

model and whilst their models are still in action.

e.g. you are 10 - 20 m away from your helicopter, you tach its

head-speed by live view its rpm right to your cell-phone

without tachometer ...

Introduction

1. Support standard JAVA MIDP 2.0 or below, and Bluetooth access via BTAPI

2. Depended on cell-phone model (as tested with Motorola SLVR L7, The range is up to 80M)

rpm window provide liveview head-speed of yourhelicopter, tach your

head-speed with your cell-phone while you are awayfrom it 10-20 meters ...


2/26- 2 -

The mercury can save up to 27 hours of information by its

internal one mega byte memory. User can download their

logged data to their computer using raclink cable (usb data

link cable sole separately) and manage the data and

performance charts with the included raczing pc client

software.

the mercury logged and live view data can be use in

difference ways to enhance your electrical-powered rc

model experience as follow :

flight data recorder,

battery health monitor,

tach your head-speed for governor mode in one place

flight-plan tools, and

system diagnostic and optimization equipment.

The mercury onboard logger and bluetooth module provides critical

information in a revolutionary way to give radio control model hobbyists a new way to fine-

tune the performance of their electrical powered model for things such as :

maximize flight time.

optimize gearing and propeller size and shape on power consumption and battery

currents.

esc and motor efficiencies through knowledge of current flow through an esc and

motor.

improve battery life by monitoring battery health.

eliminate potential risk of damaging components with peak

current data.

Benefits

The mercury delivery 50 amp3 rated current by n type mosfet with low

internal resistance, built-in logger measures and records current, voltage, rpm, throttle

level and temperature over time, then uses these measurements to calculate the maximum

power (watt) and capacity used (mah). real-time information as to live and peak current, rpm,

temperature, throttle, live and used voltage, current and maximum power (watt), as well as

existing and accumulated capacity used (mah) is transmitting using bluetooth technology.

User can use their cell-phone to read these data in real-time for their pleasure or to fine-

tune their electrical powered model.

Functions

3. Ratings are determined with 5 mph airflow on the ESC.

50 amps continuous, 100 amps surge power.

3 amps bec.

12.6 v or 3 cell lipo max with bec, 21 v or 5 cell lipo max

without bec.

low-voltage cutoff (4, 5, 6, 9, 12v or auto).

over current protection (45, 50, 65,70a or disable).

cutoff type (hard or soft).

brake type (5 options).

Features


3/26- 3 -

Specifications ESC Core

PARAMETER DATA

mosfet type n type channel

rated current 50 amp *

surge current 100 amp

bec 3 amp

max voltage with bec 12.6 v (3s lipo)

max voltage without bec 21 v (5s lipo)

Bluetooth and Logger Module

PARAMETER DATA

internal memory 8 mbit / 1 mbyte

measurement update period 340 ms

operation current 60 ma

dimensions 55 x 26 x 9 mm

weight 36 g

nominal operation conditions 0 - 50oc ambient temperature

operation range up to 80 m

throttle type (auto, fixed, governor high or low).

electronic timing advance (standard, high or low).

start type (soft, very soft or hard).

pwm switching rate (12, 16, 24 or outrunner).

measure and record current, voltage, rpm, throttle, temperature over time.

motor-wizard help determine motor magnetic pole number.

real-time calculations of the maximum power (watt) and capacity used (mah).

displays real-time informations on java enabled cell-phone streamed via bluetooth.

massive built-in 1 mb internal memory delivered continuous live data recording up to 27

hours depended on sample rate.

computer management of logged data and performance charts using a usb link cable (sold

separately) included in raczing pc client suite.

future proof user firmware upgradable.

accurate & precise - 0.01 a current and 0.01 v voltage resolutions.

smallest and lightest in its class, fits right into your model.

comes with90

days limited warranty.


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PARAMETER RANGE RESOLUTION

voltage 5 - 21 v 0.01 v

current 0 - 80 a 0.01 a

power 0 - 65535 w 1 w

capacity 0 - 65535 mah 1mah

rpm 0 - 99999 turn 1 turn

throttle 0 - 100% 1%

temperature 0 - 300oc 1oc

sampling time 0.1 / 0.2 / 0.5 / 1 second second

Logger Module

* Ratings are determined with 5 mph airflow on the ESC.

BEC

servo type

battery type


5/26- 5 -

Read these instruction before use

Before installing your mercury esc, take a moment to look it over. The input battery side has

a black and red wire along with a throttle lead. The motor side has three wires with color

black, white and red. The black and red wires of your mercury esc must connect to your

battery packs red and back with correct polarity (red wire of esc connect to red wire of

battery pack and black wire of esc connect to black wire of battery), reversed polarity may

damage your mercury esc without warranty cover.

The three wires from your motor connect to the three wire from mercury esc output. The

order of connection to the motor is not important; you can plug any motor wire to any wire

of mercury esc, in case of motor runs reverse (not your desire direction) just simply switch

both outside wires.

Always start your system in the appropriate sequence

1. be sure to plug the throttle lead into the throttle channel of your receiver.

2. turn on your transmitter (some 2.4 g radio need to power up receiver then followed by

transmitter) and set the throttle stick to mid throttle or higher.

3. connect the power battery to the mercury esc. The esc will remain disarmed and will not

operate until zero throttle is detected.

4. When you are ready to fly, move the throttle stick to its break or lowest position.

When battery is connected to mercury esc in step 3 above, mercury esc will emit 3 short

tones immediate followed by the number of tones indicate that it is power up and number of

lipo cell is counted e.g. when 3 cell lipo is connected, esc will emit 3 short tones followed by

another 3 short tones, and both red and green leds blink indicate mercury esc is unarmed

and onboard bluetooth is ready for pairing or connect respectively, the middle yellow led

stay on indicate data flash is ready to record data.

The mercury esc will not delivery power to the motor until the throttle stick of your

transmitter is moved to its break or lowest position to arm the esc, when armed mercury esc

will emit 6 short tones and red led will be turned off.

Now yellow led is stayed on, when throttle stick is leave its break or lowest position or

throttle is applied, yellow led go blink indicate data is being written to onboard data flash.When bluetooth mobile phone is connected, green led will be turned off.


6/26- 6 -

LED Status and Error Codes

LEDs provides error codes and status for mercury esc core, data logger and bluetooth

transceiver modules with 4 types of indication below.

LED turn off

LED stay on

LED blink

LED flash(es)

The following table shown the onboard led action in response to errors and system status.

type

action


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Power ON LED Status and Work Flow

Cell Phone ESC Beep Tone LED


8/26- 8 -

Programming ESC

Mercury series esc offer programming via transmitter stick or usb link (sole separately) for

advanced features such as helicopter modes.

When entered into programming mode, mercury esc

will emit red led and beep tones to indicate its

current setting and option, by moving your

throttle stick to either full or break position

for answer yes or no.

When answer either yes or no, mercury esc will emit beeps and flashes repeatedly

to indicate the answer is accepted, then move your throttle to middle

position to proceed for next setting or option.

e.g. when entered into programming mode, it will single flash / beep and followed by

another single flash / beep repeatedly to indicate it is in setting 1 option 1 (cutoff voltage -

auto lipo), move your throttle stick to answer yes or no, if answer is yes, mercury esc will

emit beeps and flashes to acknowledge your answer is accepted, then move the throttle stickto the middle position to proceed to next setting (double flashes / beeps followed by single

flash / beep for next setting current limiting - 45a), if answer is no, mercury esc will emit

beeps and flashes to acknowledge your answer is accepted, then move the throttle stick to

the middle position to proceed to next option (single flashes / beeps followed by double

flash / beep for next option cutoff voltage - 4.0v cutoff).

If you want to program some of the features without go through the rest features, you can

program it by move your stick to full position and have the acceptance tones then exit by

disconnect the mercury esc power.

next

noyes


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Enter Programming Mode

1. connect motor to the mercury esc in order to hear the programming beeps. Make sure

the mercury esc is unpowered, turn on the transmitter and move its throttle stick to

full throttle or highest position. For some 2.4g transmitter you may need to power on

receiver before turn on transmitter.

2. connect battery to the mercury esc, it will beep its initialization tones (3 short tones)

and emit single flash on red led repeatedly.

3. move the transmitters throttle stick back to middle position, the mercury esc will beep

its acknowledge tone (3 short tones) and emit double flashes on red led repeatedly.

4. move the transmitters throttle stick back to full or highest position, the mercury esc

will beep its acknowledge tone (3 short tones) and emit triple flashes on red led

repeatedly.

5. move the transmitters throttle stick back to middle position, the esc will beep its ready

tone (9 short tones) followed by single beep and emit single flash on red led repeatedly.

Now mercury esc should emit single beep / flash followed by another single beep / flash

repeatedly indicate you are in setting 1option 1 setting as mentioned before

1 second gaptone represent

setting number2 second pausetone represent

option numberrepeat

yes no next

Stick Action

Setting Tone Format


10/26- 10 -

Programming Setting Example

throttle stick in middle position after step 5 above

to enter into programming mode, ready for first

setting

single tone followed by another single toneindicate first setting and its first option

either move throttle stick to full or break

position for yes or no on first question (setting 1

options 1) e.g. cutoff voltage - auto lipo

receive acknowledge tone

move throttle stick to middle position for skip to

next option

single tone followed by another double tone

indicate first setting and its second option e.g.

cutoff voltage - 4.0v cutoff

move throttle stick to full position to take this

option

receive acknowledge tone

move throttle stick to middle position for skip to

next setting

double tone followed by another single tone to

indicate second setting and its first option e.g.

yes no

next

yes

next


11/26- 11 -

option description

1 auto-lipo * use this mode for lipo cells only. after the initialization tones,

the mercury esc will flash / beep the number of cells it countedand set the cut-off voltage to 3v per cell. if the cell count isincorrect, please check your batteries are properly charged, andstart over again until you get the correct cell count before youfly.

2 4.0v cutoff 5 cell nicad or nimah packs.

3 5.0 v cutoff 5- 8 cell nicad or nimah. packs.

4 6.0v cutoff 5- 10 cell nicad or nimah packs or 2 cell lipo pack only.

5 9.0v cutoff 5- 14cell nicad, 5 - 16 cell nimah packs, or 3 cell lipo pack only.

6 12.0v cutoff up to 16 cell nicad or nimah packs or 4 cell lipo pack only.

Setting / Option Table

* = default

Setting 1 : Cutoff Voltage

option description

1 45 a motor will be shutdown when 45a or above current is reached.

2 50 a * motor will be shutdown when 50a or above current is reached.



5 disable for experience user only, it is not recommended !

Setting 2 : Current Limiting

option description

1 soft * power will be reduced when it reached the cut-off voltage orcurrent, until the batteries voltage is back-up above the cut-offvoltage again or current below current limit point, during thisperiod the mercury esc will continually modulated its power tomaintain the cut-off point.

2 hard power will be shutdown immediately when the batteries or currentreaches the cut-off point. The motor will restart by re-arming.

Setting 3 : Cutoff Type


12/26- 12 -

option description

1 soft delayedbrake *

for general aircraft with fixed or folding prop.

2 hard delayedbrake hard brake power is applied on braking.

3 soft brake(no delay)

immediately small amount of brake force is applied on braking.

4 brake(no delay)

immediately hard brake power applied on braking.

5 disable brake is disable which is suitable for helicopter, 3d airplanes.

Setting 4 : Brake Type

option description

1 autocalibratingthrottle *

to utilizes your transmitters full available throttle range.

full throttle for 4 seconds, mercury esc will remark the fullthrottle point and redistribute its throttle range with escpower for better linearity.

2 fixedthrottle

use transmitters default endpoints.

3 governor low governor control power which is attempt to keep motors rpmwith throttle stick position / throttle percentage regardless

of how the load changes. For collective pitch helicopter 3d flywhere a constant head speed is desired. mercury esc capable touse bluetooth java enabled cell phone act as tachometer :

1. set either governor low or high from here

2. check your motors magnetic pole number via motor wizard

3. enter gear ratio and magnetic pole number and store to escfor correct head-speed live view

4. pair / connect your cell phone and live view mercury esc dataon your cell phone

5. place your helicopter away from you around10

-15

meters6. move your throttle up and monitor the rpm (head-speed) data

on cell phone until desired head-speed is obtained

7. mark your throttle stick position or percentage and set itfor your idle-up flat curve

if desired head-speed is not reach with motor pole number orgear ratio, you can switch the governor mode to high and re-

tach e.g. 80 % throttle can not obtain head-speed to 1800 orabove !

4 governor high see governor low above.

Setting5

: Throttle Type


13/26- 13 -

option description

1 low advance motor rpm decrease with less current draw. recommendedfor lower pole count motor.

2 standard advance * best balance of power and efficiency for motor.

3 high advance motor rpm increase with more current draw. recommendedfor higher pole count motor.

Setting 6 : Electronic Timing Advance

option description

1 very soft start slowest spool up and softest start.

2 soft start * medium spool up and soft start.

3 fast start fast spool up and faster start.

Setting 7 : Soft Start

option description

1 12 kHz recommended for most motors.

2 16 kHz recommended for low inductance motors.

3 24 kHz recommended for very low inductance motors.

4 out-runner * recommended for out-runner motors.

Setting 8 : PWM Switching Rate

raczing Mobile Client

Mercury esc provides real time data streaming into any bluetooth equipped java cell-phone.

Download and copy the software to your cell-phone via either bluetooth or data cable as a

normal java game and install accordingly. Since installation methods for java applets vary

from brand to brand, they may display entire different dialog; e.g. nokia phones allow

copied java program to run directly while sony ericsson phones require you to install

copied java program to another folder ! The following example is based on a sony ericsson

k770i model.

1. download raczing mobile client from raczing website and copy to your cell phone folder.

2. turn on your cell phones bluetooth.

3. run (some cell-phones need installation first) the raczing mobile client from where it is

saved or copied.
http://www.raczing.com/http://www.raczing.com/http://www.raczing.com/


14/26- 14 -

4. press the search button on the raczing mobile clients menu and start searching for

bluetooth device - mercury.

5. press ok or yes when the "allow application to create client bluetooth connection"

dialog box appear.

6. press ok or yes when the "mercury add to my devices ?" dialog box appears.

7. when ask for passcode, enter 00000 which is default passcode and can be changed viaraczing pc client later.

8. raczing mobile client display current, voltage, rpm and watt on its front page.

9. press number10 - 9, # from keypad for different views or features.

10. press number 5 from the keypad to create a new session that also wraps up current

recording session. e.g. measuring power of different start style like soft-start, hard

start, and exponential value without the need to reconnect the battery to reset. This

feature is especially useful when electronic components are sealed inside waterproof

compartments on boats ! (Note: the new session feature only works when the mercury

esc is in range to receive commands)

11. press exit from client menu to exit program at any time.

view all 4 main data on front page0

current (a) and its peak value1

voltage (v) and its minimum value2

rpm and its peak value3

power (watt) and it peak value4

temperature (c) and its peak value5

throttle (%) and its peak6

capacity (mah)7

new session8

about us page9

screen saver off#

1. Raczing Mobile Client Display Hot Key


15/26- 15 -

Search

Yes

Exit

No

Green

lightflashinga

nd

red

lightsteady

Startrec

ordingto

internalmemorywhent

hrottleisapplied

and

escisarme

d


16/26- 16 -

Yes

Exit

Yes

Yes

Green

lightblink

Startrecordingto

internal

memorywhen

throttleisapplied

and

escisarmed

Green

ligh

toff

Communication

channel

isestablished

via

bluetooth,startsendin

ginformation

to

thepaired

cell-phone

No

No

No


17/26- 17 -

Green

lightoff

Communication

channelisestablished

viablueto

oth,startsending

information

to

paired

cellphone

Out of range

Green

lightb

link

Communication

channelisbroken,

switch

to

LISTENIN

G

mode

Wrapupcurrentlo

gging&

startanew

logwithoutn

eed

to

resetpowerbydisconnect

powersourceand

connectback

again.

New

session

featur

eisexceptionallyusefulwhen

new

peakvalueloggingisneeded

and

resetmercuryescisdifficultfo

r

instancemercuryis

tightlysealed

insidethecompart

ment!

Communication

chan

nelis

established

again

Green

lightoff

within range


18/26- 18 -

Raczing PC Suite

Windows based pc suite provides rich esc setting rather than

traditional stick programming and management for logged

data such as graph plotting, editing, saving and deleting.

other device related settings and

features like motor wizard, firmwareupgrades and device name as well as

bluetooth passcode can also be

configured though the single

executable program without

installation.


19/26- 19 -

download and unz ipraczing pc suite to yourdesktop or perfectedlocation.

connect a raclink usbcable to the throttlelead of mercury esc,windows will try to

installing driver for it,just leave it, installusb driver from devicemanager.

go to control panel,go into hardware andsound setting.

click on the devicemanager for devicessetting.

c l i ck ope n ot he rdevices and see ifunknown device isthere, double click toopen it.

click update driverto up da te th e us bdriver.

Step 1. Install Raclink (usb link) USB Driver (Windows 7)

to folder located thedownl oaded dr ive rraczingusbdriver .

click on the browse mycomputer for driversoftware

click browse... tolocate the downloadeddriver on pc.

click install thisd r i v e r s o f t w a r eanyway when windowsc a n t v e r i f y t h epu b l i s h e r o f t h i ss o f t w a r e d i a l o gprompt.

1.01 1.02

1.03 1.04

1.05 1.06

1.07 1.08

1.09 1.10
http://www.raczing.com/http://www.raczing.com/


20/26- 20 -

driver for usb name r a c z i n g u s b i sinstalled.

now under device list,you should see the usbdriver is installedu n d e r u s b 1 / 0controller.

connect a usb cable toboth mercury and pcusb port, windows will

immediately promptfound new hardware

download and unz ipraczing pc suite to yourdesktop or perfected

location.

1.021.01

Step 1. Install Raclink (usb link) USB Driver (Windows XP)

i n t he f ou n d ne whardware wizard dialogbox, select yes, thistime only. windows willnot ask for driversnext time when themercury is connected

select install from a

l i s t o r s p e c i f i clocation, and pressthe next button tocontinue ...

select search for the

best driver in theselocations and checkinclude this locationin the search:, pressthe browse button tolocate the downloaded

driver

the raczing usb driveris installed . the pcsuite software is readyto import and managerecorded data frommercury esc

1.03 1.04

1.05 1.06

1.121.11
http://www.raczing.com/http://www.raczing.com/


21/26- 21 -

Step 2. Run raczing PC Suite and import your first record

click on any record andselect chart frommenu action to viewin graph form.

wait for data graph isbeing plotted.

when data is imported,you can either keep itor purge it all frommercury to preventduplication on next

import.

imported data will belisted, and its date isset to import recorddate, dont worry youcan change it later.

when raclink usb cablei s c o n n e c t e d a n ddetected, you can click o k t o i m p o r t

recorded data to pc.

c l i c k t o r a c z i n g -pcsuite program whichis dow nl oad ed an dunzipped earlier.

2.022.01

2.03 2.04

2.05 2.06

Step 3. plot graph

drag your mouse lefto r r i g h t t o s h o wparticular time frame.

m o v e y o u r m o u s epointer on the graph toshow its values in time.

use mouses scrollwheel to zoom in orout, or press the zoomin out button locatedon top right corner of

chart window.

or press the play,forward or backwardbutton to show data onparticular time.

3.04

3.023.01

3.03


22/26- 22 -

Step 4. edit / save / open / delete record

to edit record, simplyclick on the record andselect edit frommenu.

update records date,title, description ort a g s f o r e a s yreference.

4.024.01

to toggle view or hideindividual data by clickto its data label.

3.05

pres s the upd atebutton to confirm thechange.

to save the imported orupdated record, simplyclick on save filef r o m m e n u f i l e located on upped rightcorner.

select the saved filefrom where you haspreviously saved e.g.desktop.

to op en th e sa ve drecord, click on theopen file from menufile located on upperright corner.

to delete individualrecord, click on therec ord and se le ctdelete from menu.

4.044.03

4.064.05

4.07


23/26- 23 -

Step 5. Change device setting

click on the upperright corner - settingsmenu for bluetoothsetting.

change the device name(default mercury), thisis the name that appearw h e n c e l l - p h o n e

s e a r c h e s f o r t h emercury. the passcodecan also be changed.

click on the upperright corner - settingsmenu for esc settingan d go in to mo to rwizard page.

features like throttle,brake, motor, cutoffstype and motor wizardis available from richinterface !

5.01 5.02

5.045.03

Step 6. PC client upgrade

click to the downloadnow button under

r a c z i n g p c c l i e n tsection to downloadnew version

click to the check fornew version icon on

the home page to checkfor available upgrade

save the downloaded pcc l i e n t t o . . . e . g .desktop.

wait for the softwaredownload to complete.

6.026.01

6.03 6.04


24/26- 24 -

Step 7. Firmware upgrade (manual)

click to the downloadnow button underfirmware section todownload new version.

click to the check fornew version icon onthe home page to checkfor new ava i la ble

upgrade.

save the downloadedfirmware to ... e.g.desktop.

wait for the firmwaredownload to complete.

7.01 7.02

7.047.03

select downloadedfirmware e.g. on yourdesktop.

click on the upgradefirmware button onthe home page toinstall the downloadedfirmware.

note : button appears

when mercury esc isplugged in.

wait until the upgradeprocess is completed,do not d i sco nne ctpower at this time.

press the ok buttonto confirm firmwareupgrade.

7.067.05

7.087.07


25/26- 25 -

Step 8. Firmware upgrade (automatic)

click to the downloadnow & install buttonunder firmware sectiont o d o w n l o a d n e w

version and install.

click to the check fornew version icon onthe home page to checkfor new av ail ab le

upgrades.

save the downloadedfirmware to ... e.g.desktop.

wait for the firmwaredownload to complete.

firmware upgrade iscompleted.

wait until the upgradeprocess is completed,do no t di sc onn ec tpower at this time.

8.028.01

8.048.03

8.068.05


26/26

Electric-powered rc model use high

power electrical systems may pose

dangers, and it is the users

r e s p o n s i b i l i t y t o b ef a m i l i a r w i t h t h e s e

dangers and take any

n e c e s s a r y a c t i o n t o

ensure safe use.

Imp rop er us e of th e

Mercury esc may starts

the motor without warning

and cause the propeller

to rota te, which ris k

serious consequences

including but not limited

to damage to equipment and

serious personal injury. Always keep a

safety distance between the propeller,

and any other person and objects.

The mercury esc is not intended to be

use by children.

When the battery has tocon nec t to the motor

whilst working on the

aircraft, it is a good safety

precaution to remove the

propeller.

Understand and observe

a l l l o c a l l a w s a n d

r e g u l a t i o n s b e f o r e

operati ng any remote

control models.

As a safety precaution for

peoples around you, please

refrain from flying over others or

close to a crowded area.

Safety Precautions

Caring Instruction The Mercury contains no user serviceable parts inside. It does not

require special care, just gentle wipe the mercury with a damp cloth if it gets dirty and it

can be stored anywhere other than an extreme environment or under direct sunlight for a

prolonged period of time.

Technical support Please visit out site www.raczing.com or email us at

[email protected] for more technical support if you are still having difficulties or have

questions that arent covered in this manual.

Warranty The Mercury is guaranteed to be free from defects in materials and

workmanship for a period of 90 days starting from the date of your original purchase.

Please refer to the Raczing product warranty page for detailed terms and conditions as

well as procedures for warranty claims.

Changes The material in this manual is for owners information only and is subject to

change without notice. While reasonable efforts have been made in the preparation of this

manual to ensure accuracy, Raczing assumes no liability resulting from errors or omissions

in this manual or from the use of information contained herein. Raczing reserves the right

to make changes in the product design without reservation and without notification to

users. Please check out our website www.raczing.com frequently for the latest user manual.

Copyright Copyright (c) 2010 by Raczing. All rights reserved. No part of this manual may,

without the written permission of Raczing be reproduced or transmitted in any form or by

an means, analog, digital, electronic or mechanical, including imaging, photocopying and

recording, for any purpose other than the owners personal use.
http://www.raczing.com/mailto:[email protected]://www.raczing.com/http://www.raczing.com/http://www.raczing.com/http://www.raczing.com/mailto:[email protected]:[email protected]://www.raczing.com/http://www.raczing.com/

raczing user guide (mercury)

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