INSTRUCTION MANUAL
Multimeter 7IN
1
TABLE OF CONTENTS
| TABLE OF CONTENTS |
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INTRODUCTION
INTRODUCTION
Introduction
03
T h a n k y o u for the purchase of this Turnigy M e g a Meter. T h e Turnigy
M e g a Meter c a n carry out an e n o r m o u s range of functions related to
Features
04
Set Contents
04
Electric P o w e r e d m o d e l s a n d h a s b e e n d e s i g n e d with e a s e of u s e a s
Battery Checker
06
a prime objective. This Instruction Manual describes the scope of
M e g a M e t e r a n d h o w t o m a k e it w o r k f o r y o u .
Battery Internal Resistance
08
Watt Meter
10
Servo Tester
12
Tacheometer R P M
13
Temperature
Thrust Calculator
14
Product Specifications
16
Warranty A n d Service
16
15
Input
/ ! \N - Before you start
T h i s is a s o p h i s t i c a t e d unit w h i c h will b e a n i m p o r t a n t t o o l in y o u r
Voltage
'
L C D Display
Port
e l e c t r i c p o w e r e d m o d e l p r o g r a m . P l e a s e b e c a r e f u l w i t h it! A n d p l e a s e
Dot Matrix 128*64
read this instruction m a n u a l thoroughly before operating.
Do n o t d i s a s s e m b l e , m o d i f y or subject t h e unit to f o r c e impact.
K e e p t h e M e g a M e t e r w e l l a w a y f r o m dirt o r w a t e r .
High p o w e r electrical s y s t e m s pose d a n g e r s i n d e p e n d e n t of devices
C o n n e c t o r to
like t h e M e g a M e t e r a n d it is t h e u s e r ' s r e s p o n s i b i l i t y t o b e f a m i l i a r w i t h
Temperature
these dangers a n d take any necessary action to ensure safe u s e .
Sensor Probe
Mode
Shorting a rechargeable battery or a M e g a Meter connected to a
rechargeable battery or battery charger can supply huge currents a n d
Output
h a v e serious c o n s e q u e n c e s including e x p l o s i o n s , c a u s i n g fire, d a m a g e
C o n n e c t o r to
t o e q u i p m e n t a n d p e r s o n a l injury.
Servo
.Optical
T h e r e are risks a s s o c i a t e d with t h e potentially high currents m e a s u r e d
P o t e n t i o m e t e r Dial
by the M e g a Meter. T h e s e include, but are not limited to, fire, burns
to Control Servos,
a n d p e r s o n a l injury. T h e u s e r m u s t b e f a m i l i a r w i t h t h e r e l e v a n t m e t h -
ESC, other P W devices
ods, procedures and connection components before using or making
any connection.
Do not e x c e e d a m a x i m u m of 6 0 volts for the main power pack ( M P P )
Keep proper distance from propeller during m e a s u r e m e n t process.
Tachometer
Sensor
Enter
FEATURES
FEATURES
T h e M a i n s c r e e n d i s p l a y s all t h e a v a i l a b l e f u n c t i o n s . T h e d e s i r e d
function can be a c c e s s e d by highlighting the desired function by
pressing ' M O D E ' button, pressing the ' E N T E R ' button to select
that function.
FEATURES
1. Battery C h e c k e r
2. B a t t e r y I n t e r n a l R e s i s t a n c e
3. W a t t M e t e r
4. S e r v o Tester
I N T RES I STftNC E
WATT H E T E R
SERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
THRUST
CfiLC. . .
S E T UP
5. O p t i c a l T a c h o m e t e r
6. T e m p e r a t u r e G a u g e
7. T h r u s t C a l c u l a t o r
BATTERY
CHECKER
INT.RESISTANCE
HATT
METER
S ERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
THRUST
CALC. . .
SET CONTENTS
BATTER V
CHE C KER
iraiiRiHimi
HiiTT
METE R
SERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
THRUST
CALC...
S E T UP
1. Input C a b l e
4. Temperature Probe
2. B a t t e r y I n t e r n a l R e s i s t a n c e C a b l e
5. O u t p u t C a b l e
3. M e g a M e t e r
BATTERY
CHECKER
INT . RESISTAN C E
BATTERY
CHECKER
INT.RESISTANCE
HATT
METER
SERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
napm
SET
UP
BATTER Y CHECKER
INT.RESISTANCE
HATT
METER
SERUO
TESTER
T A C H0 METER
RP M
SERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
THRUST
CALC...
SET U P
Hdiijjiiaiiisia
BATTERY
CHECKER
INT.RESISTANCE
HATT
METER
BATTERY
CHECKER
INT.RESISTANCE
HATT
METER
SERUO
TESTER
TACHOMETER
RPM
TEMPERATURE
THRUST
CALC...
SET U P
naaaaflamaaa
THRUST
SET U P
CALC...
TEMPERATURE
THRUST
CALC...
SET
UP
BATTERY CHECKER
BATTERY CHECKER
T h e M e g a M e t e r a l l o w s y o u t o c h e c k t h e i n d i v i d u a l cell v o l t a g e s o f a 2
cells-8 cells Lithium battery. T h e M e g a M e t e r individually m e a s u r e s &
d i a g n o s e s t h e cell v o l t a g e s o f t h e m u l t i p l e c e l l s , t h e r e s u l t is d i s p l a y e d
o n t h e l a r g e l i q u i d c r y s t a l s c r e e n . T h e M e g a M e t e r r e p l a c e s all o f t h e
BATTERY CHECKER
• C o n n e c t the balance lead to ' V O L T P O R T '
• P r e s s ' E N T E R ' to e n t e r m a i n f u n c t i o n s c r e e n
• P r e s s ' E N T E R ' to s e l e c t B A T T E R Y C H E C K E R f u n c t i o n
• Press ' M O D E ' to select battery type
• Press ' E N T E R ' to confirm battery type
Battery Type
t e d i o u s m e a s u r e m e n t a n d c a l c u l a t i o n s r e q u i r e d in t h e p a s t to d e t e r m i n e
t h e o v e r a l l v o l t a g e o f t h e L i P o , L i F e & L i l o n p a c k a n d t h e i n d i v i d u a l cell
•i:i3
T h e M e g a M e t e r n o w m a k e s it p o s s i b l e to d e t e r m i n e a n d v e r i f y t h e
' 3
S
Remaining Amount %
17
5
6
A b a l a n c e d b a t t e r y p r o v i d e s a s a f e r e n v i r o n m e n t w h e n f l y i n g . If y o u
k n o w t h a t y o u r cell b a l a n c e is o u t y o u c a n a d d r e s s t h e i s s u e .
T h e p r e v e n t i o n of d e t e r i o r a t i n g cells o v e r t i m e , will i m p r o v e t h e
efficiency and stability of the Lithium battery.
- 8 5
-i
SH
5 3 . S 5 2
5 3 . 0 -7 7
5 8
7
E 1
9K
K1
L i P o
voltages that determine the balance of the Lithium pack.
detailed state of the Lithium battery.
Number of Cells
Balance Status %
y
.
L
2
2
H
6
8
Serial Pack Voltage )
3 . 1 5 9 U
5 3 . 8 H 7!
5 3 . 8 5 91
5 3 .8781
:> (.
S3
1
i Individual Cell Voltage
;;<;! Balance Gauge
The Highest Cell Voltage Lowest Cell Voltage! i Cell Voltage Differential
W h e n y o u c o n n e c t t h e b a l a n c e l e a d to t h e M e g a M e t e r y o u m u s t
ensure that both the G r o u n d pin's for the balance connector a n d the
Mega Meter
Serial
voltage
P a c k v o l t a g e o f t h e w h o l e b a t t e r y ( t o t a l v o l t a g e o f all c e l l s ) is i n d i c a t e d
go together. Different Balance leads have different wiring configurations
The number
and s o m e are colored.
T h e t o t a l n u m b e r o f c e l l s in t h e b a t t e r y p a c k is i n d i c a t e d ( 6 S a s indicate
of serial
cells
in t h e p i c t u r e 6 s e r i a l c e l l s ) . T h i s is t h e s a m e a s t h e cell q u a n t i t y .
T h e M e g a M e t e r h a s 2 . 5 4 m m pin i n t e r v a l s . If t h e c o n n e c t o r o n y o u
Remaining
b a t t e r y d o e s n o t fit d o n o t f o r c e t h e c o n n e c t o r , o b t a i n a s u i t a b l e a d -
T h e remaining a m o u n t g a u g e gives you a graphical bar graph display
aptor lead from your h o b b y s h o p .
of the status of the battery by g r a p h and the b a l a n c e of the cells by
amount
fuel
gauge
g r a p h . W h e n t h e b a t t e r y is f u l l y c h a r g e d t h e g r a p h e x t e n d s t o " F " o n
t h e right h a n d s i d e o f t h e L C D . A s in t h e e x a m p l e y o u c a n s e e t h a t t h e
b a t t e r y is a b o u t 5 0 % u s e d . T h e r e a r e t i m e s w h e n d i f f e r e n c e s o c c u r
between the remaining a m o u n t and the actual remaining amount.
T h e s e differences can be associated with the quality a n d use of the
b a t t e r y a n d its c e l l s . A b a t t e r y t h a t h a s a l w a y s b e e n c h a r g e d w i t h a
r e p u t a b l e b a l a n c e r is l i k e l y t o r e p r o d u c e a c c u r a t e r e a d i n g s o n t h e
M e g a M e t e r . A b a t t e r y t h a t h a s h a d a h a r d life full d i s c h a r g e a n d r e c h a r g e w i t h n o b a l a n c e c h a r g i n g is m o r e l i k e l y to h a v e d i s c r e p a n c i e s
between actual and s h o w n results.
Cell balance
Battery Connection Diagram
gauge
T h e C e l l b a l a n c e g a u g e m e a s u r e s t h e d i f f e r e n c e b e t w e e n all c e l l s t h a t
are c o n n e c t e d to the M e g a Meter.
BATTERY INTERNAL RESISTANCE
BATTERY INTERNAL RESISTANCE
T h e d i f f e r e n c e is s h o w n g r a p h i c a l l y b e t w e e n t h e c e l l t h a t is s h o w i n g
O n c e w e h a v e a n idea o f t h e internal r e s i s t a n c e of a cell w e c a n t h e n
t h e h i g h e s t cell v o l t a g e t o t h e cell t h a t is s h o w i n g t h e l o w e s t cell v o l t a g e
u s e t h a t t o d e t e r m i n e h o w e f f i c i e n t o u r p o w e r s e t u p is a s w e l l a s
( l a r g e s t cell v o l t a g e d i f f e r e n c e ) i n d i c a t e d o n t h e g r a p h . W h e n t h e cell
k n o w i n g h o w m u c h p o w e r is b e i n g t u r n e d t o h e a t in t h e b a t t e r y p a c k
v o l t a g e s r e a d e q u a l , t h e b a r e x t e n d s all t h e w a y t o t h e r i g h t ( O ) . T h i s
and additionally k n o w h o w m u c h the voltage c a n potentially drop under
i n d i c a t e s t h a t t h e c e l l s a r e all b a l a n c e d t o a s a t i s f a c t o r y l e v e l . W h e n
load.
t h e c e l l s h a v e a d i f f e r e n c e in v o l t a g e t h e b a r s h o r t e n s a n d i n d i c a t e s
t o w a r d s t h e left ( X ) . In o r d e r t o m a i n t a i n l o n g l a s t i n g b a t t e r y life if t h e
b a l a n c e g a u g e d o e s n o t s h o w a s a t i s f a c t o r y c e l l b a l a n c e t h e n a cell
b a l a n c e r s h o u l d b e a p p l i e d t o t h e p a c k b e f o r e u s e . If t h e c e l l b a l a n c e
i n d i c a t i o n is l o w a f t e r t h e b a t t e r y h a s b e e n u s e d t h i s c a n b e n o r m a l a n d
charging should occur with a balance charger.
BATTERY INTERNAL RESISTANCE
T h e M e g a M e t e r h a s b e e n c r e a t e d to give y o u t h e ability to m a k e
a n i n f o r m e d d e t e r m i n a t i o n o f w h a t t h e t r u e cell a n d p a c k r a t i n g s
b y p r o v i d i n g a u s e f u l m e a s u r e , t h e cell i n t e r n a l r e s i s t a n c e .
BATTERY
CHECKER
• m S H E C B l
I n t
WATT
METER
SERUO T E S T E R
T A C H O M E T E R RPM
TEMPERATURE
THRUST
CALC...
S E T UP
. R e s i s t a n c e
Res:
33
noh
L e t it b e s t a t e d t h a t t h e r e is n o p e r f e c t t e s t f o r c e l l i n t e r n a l r e s i s t a n c e .
Due to t h e nature of batteries, cells exhibit characteristics of resistance
c a p a c i t a n c e a n d i n d u c t a n c e o f w h i c h all c o n t r i b u t e t o t h e m e a s u r e d
internal resistance. Internal resistance c a n v a r y c o n s i d e r a b l y e v e n
• Connect battery to M e g a Meter via Voltage Port to p o w e r o n the
within the s a m e cell, this m a k e s the task of d e t e r m i n i n g t h e internal
• M e g a M e t e r Using supplied cable (pitch 2 . 5 4 m m ) to m e a s u r e indi-
r e s i s t a n c e a lot h a r d e r .
vidual internal resistance
• P r e s s M O D E ' to select 'INT. R E S I S T A N C E ' f u n c t i o n
• Press ' E N T E R ' to confirm selection
Factors effecting resistance readings:
Contact
corrosion
W h i l e n o t a c t u a l l y p a r t o f t h e c e l l itself, h a v i n g d i r t y c o n t a c t s t o t h e c e l l s
c a n m a k e a n o t i c e a b l e d i f f e r e n c e in t h e r e s i s t a n c e . W i p i n g c l e a n t h e
contacts c a n improve contact resistance by 10 or m o r e milliohms.
Cell
temperature
F o r m a n y cell c h e m i s t r i e s t h e r e s i s t a n c e o f t h e p a c k d e c r e a s e s initially
f r o m r o o m t e m p e r a t u r e to a certain level ( p e r h a p s 4 5 C ) after w h i c h t h e
r e s i s t a n c e o f t h e p a c k will i n c r e a s e a g a i n . L i t h i u m c e l l s in p a r t i c u l a r
s u f f e r p o o r cell r e s i s t a n c e n e a r OC.
Cell
charge
G e n e r a l l y t h e c l o s e r t o a f u l l c h a r g e a cell is t h e l o w e r t h e i n t e r n a l
resistance.
Cell age
Connection D i a g r a m for M e a s u r e m e n t of Battery
Internal Resistance
A s cells b e c o m e older their internal r e s i s t a n c e t e n d s to i n c r e a s e .
T h e M e g a M e t e r h a s b e e n built t o a l l o w c e l l s t o b e t e s t e d u n d e r a
k n o w n s e t o f l o a d s w h i c h will f a c i l i t a t e c o m p a r i s o n s .
- 09 -
WATT METER
PRECAUTIONS
WATT METER
• Effect o f g e a r i n g a n d propeller size a n d s h a p e o n p o w e r c o n s u m p t i o n
1 . D o n o t l e a v e a cell c o n n e c t e d t o t h e M e g a M e t e r f o r m o r e t h a n f i v e
and battery currents
• Effects of modifications, a g e a n d d a m a g e o n m a n y electrical s y s t e m
minutes.
2. B e aware that although t h e M e g a Meter only takes small s a m p l e s
components
• C l e v e r h o b b y i s t s will d i s c o v e r n e w a p p l i c a t i o n s t o further i m p r o v e
from
the battery p a c k , t h e v o l t a g e will b e r e d u c e d . M a k e s u r e y o u c h e c k
your pack balance.
3. A v o i d p l u g g i n g t h e cell in r e v e r s e p o l a r i t y . T h e M e g a M e t e r c a n
cope with
a r e v e r s e d c o n n e c t i o n f o r a f e w s e c o n d s b u t it's still b e t t e r n o t t o d o
electric model performance.
The following are s o m e examples of meter connections. Many other
arrangements and uses are possible
Testing Loads
(e.g. motors)
it in t h e first p l a c e .
WATT METER
This function m e a s u r e s Current ( A m p s ) , P e a k current, Voltage (Volts),
Power (Watts), Energy(Watt-Hours) and Ch a r g e ( Am p - Ho u rs) values for
y o u , i n r e a l - t i m e , f o r t h e c i r c u i t in w h i c h y o u c o n n e c t it.
Battery
Pack
WATT
METER
CURRENT:^. 3 5.11ft
P E A K CC 'j.i. 5 2 . l i f t
U DL.TftGE : 2 5 . 1 3 U
N-ftTTflGE : 8 8 2 . 3 1 M
P EflK ( H ) : 1 3 6 3 . 2 M
Energy:
82Nh
Speed
Controller
Motor
Battery o n S O U R C E side, Electronic Speed Controller ( E S C ) and
m o t o r on L O A D side, with E S C o n , t h e m e t e r s h o w s the current into t h e
motor, voltage a n d power at the battery a n d accumulates the charge
3 1 H
•1—
•
Speed
Controller
Motor
M e g a M e t e r is a c t i v a t e d w h e n t h e b a t t e r y is c o n n e c t e d t o t h e u n i t .
( A h ) w h i l e t h e m o t o r is r u n n i n g .
Battery
Charging
Battery
Charger
• Press ' M O D E ' to select 'WATT M E T E R ' function
• Press ' E N T E R ' to confirm selection
HATT
METER
CURRENT:
35 .11 A
PEAK C O :
5 2 . 1 ifl
UOLTfiSE:
2 5'. i 3 U
WATTftGE:
SS 2 .SIM
P%
ftK<H>:
1 3 @ 3 .2H
E n e r g y
3 2Hh
Charge.
3 .2 Ah
Battery
With a battery charger o n the S O U R C E side and battery pack o n the
N o w y o u can stop w o n d e r i n g what's going o n with y o u r electric model
L O A D side, t h e m e t e r s h o w s the c h a r g i n g current into the battery, t h e
and get a n s w e r s that allow y o u to apply science to your hobby. T h e
voltage and charging power at the battery and accumulates the charge
p r e c i s e m e a s u r e m e n t s y o u collect will help y o u fine t u n e y o u r m o d e l
( A h ) into t h e battery.
to get all t h e p e r f o r m a n c e that y o u paid for.
W i t h w a t t m e t e r f u n c t i o n , it is n o w e a s y t o d e t e r m i n e t h i n g s l i k e :
• Flight time
• Current through an E S C and motor
Battery
Discharging
Battery
Pack
CURRENT
PEKKCc
y•
U Q L TftGE:
HftT Tft6 E
Discharge
Load
• E S C , B E C a n d motor efficiencies
• C h a r g e p u t into a n d r e m o v e d f r o m a battery a n d t h e p e r f o r m a n c e o f
battery chargers
W h e n t h e b a t t e r y is d i s c h a r g e d , t h e m e t e r i n d i c a t e s t h e t o t a l c h a r g e
• Battery health
(Ah) the battery delivered to the load a s well a s current, voltage a n d
• W h y p o w e r is l o s t d u r i n g a c r o b a t i c s o r e x t r e m e c o n d i t i o n s
discharging power.
SERVO TESTER
Receiver
& Servo
Servo 1
Battery
Pack
U0L T AGE
WATTAGE
PEftKCH)
TACHEOMETER RPM
To use the Servo Tester to operate an ESC and motor
Testing
Reciver
C o n n e c t i n g a battery to the M e g a M e t e r volt port. A n o t h e r plug c o n n e c t e d t o t h e S e r v o T e s t e r is t h e p l u g f r o m t h e E S C t h a t n o r m a l l y g o e s t o
the receiver. C o n n e c t t h e E S C to motor leads.
W h e n you connect the
b a t t e r y t o t h e E S C it will p o w e r u p . It s h o u l d r e a c t t h e s a m e w a y
Servo n.
d o e s w h e n p o w e r e d u p u s i n g t h e r a d i o g e a r w i t h t h e t h r o t t l e s t i c k in
the m i n i m u m power position. You c a n n o w spin up the motor by turning
t h e s e r v o t e s t e r k n o b . N o r e c e i v e r o r t r a n s m i t t e r is n e e d e d . T h i s is a
g r e a t w a y to test m o t o r s o n t h e b e n c h .
SERVO TESTER
TACHEOMETER RPM
S e r v o testers are very useful for exercising your servos a n d Electronic
s i g n a l j u s t like t h e s i g n a l s n o r m a l l y s e n t b y y o u r r e c e i v e r t o t h e s e r v o s
T h e r e is a n o p t i c a l t a c h o m e t e r w i t h i n M e g a M e t e r . A n o p t i c a l t a c h o
s e n s o r is f i t t e d t o t h e r i g h t s i d e M e g a M e t e r c a s e a n d is a c t i v a t e d b y
pointing M e g a M e t e r t o w a r d s the propeller at a distance of 10 a n d 2 0 c m
f r o m the propeller.
or E S C .
• Connect battery to M e g a Meter via Voltage Port to power o n the
S p e e d Control ( E S C ) without the need to turn o n your transmitter, a n d
y o u d o n o t e v e n n e e d y o u r receiver. T h e s e r v o tester will put o u t a
T h e dial k n o b o n t h e s e r v o tester will c h a n g e t h e signal just
like m o v i n g y o u r t r a n s m i t t e r s t i c k w o u l d c h a n g e t h e s i g n a l g o i n g t o a
servo or E S C .
• M e g a Meter Press ' M O D E ' to select " T A C H O M E T E R R P M "
• Press ' E N T E R ' to confirm the function
To use the tester to evaluate a servo
• P r e s s ' M O D E ' a g a i n t o c h a n g e t h e r a n g e o f 1-5 b l a d e s
C o n n e c t i n g a battery to the i-Meter volt port. Plug a servo into the
• P r e s s ' E N T E R ' to start R P M m e a s u r e m e n t
s e r v o port. T h e s e r v o c a n be c o n t r o l l e d w i t h t h e a d j u s t m e n t dial u n d e r
M a n u a l M o d e . P r e s s ' M O D E ' button o n c e to set t h e P P M signal to a u t o .
T h e s e r v o tester will u s e 1 5 2 0 u s a s c e n t r e a n d a u t o m a t i c a l l y o u t p u t
cycling signal to m o v e the servo a r m back and forward.
T h e f l u c t u a t i n g l i g h t c a u s e d b y t h e r o t a t i o n o f t h e p r o p e l l e r is s e n s e d
and counted over a period of either 1 or 2 seconds. Allow a couple of
s e c o n d s for r e a d i n g s to steady.
W i t h a g e a r e d m o t o r , t h e m o t o r R P M will n o r m a l l y b e h i g h e r t h a n t h e
p r o p . R P M , b u t it is t h e p r o p r p m w h i c h is b e i n g m e a s u r e d a n d q u o t e d ,
s o t h e g e a r r a t i o is n o t r e a l l y r e l e v a n t .
TEMPERATURE
THRUST CALCULATOR
Please D O N ' T u s e optical t a c h o m e t e r with fluorescent lighting w h i c h
m RUST CALCULATOR
will g i v e false r e a d i n g s , s u c h a s 3 0 0 0 o r 3 6 0 0 r p m .
The thrust calculator can estimate the thrust of a n airplane, there are
many variances and some known factors.
T h e optical R P M s e n s o r will f u n c t i o n o v e r a large r a n g e o f propeller
L e t s a s s u m e w e h a v e a n a i r p l a n e a n d t h i s is its first f l i g h t . W e k n o w t h e
s i z e s , R P M a n d l i g h t i n g c o n d i t i o n s . It h a s e v e n a b l e t o m e a s u r e 4 0 m m
s i z e o f t h e p r o p e l l e r a n d w e c a n d o a s t a t i c full t h r o t t l e r p m c h e c k w i t h a
d i a m e t e r m o d e l b o a t p r o p s s p i n n i n g in t h e air. E x p e r i m e n t w i t h d i f f e r e n t
t a c h o m e t e r o n t h e g r o u n d . W e c a n n o w a d d t h e s e k n o w n figures into
s e n s o r p o s i t i o n s . In s o m e c a s e s , b e s t r e s u l t s m a y b e a c h i e v e d b y
T h r u s t C a l c u l a t o r . B y t h e f a c t t h a t y o u c a n v e r i f y t h r u s t it b e c o m e s
t e s t i n g in t h e s h a d e . W i t h t h e m o t o r r u n n i n g , m o v e t h e o p t i c a l s e n s o r
p o s s i b l e , t o e s t i m a t e t h e g e n e r a l p o w e r o f t h e a i r p l a n e in a d v a n c e .
t o a b o u t 1 0 - 2 0 c m f r o m t h e p r o p e l l e r s , t a k i n g all d u e c a r e . S m a l l
T h i s will g i v e y o u m o r e k n o w l e d g e a b o u t y o u r p l a n e a n d t h e p o w e r
propellers m a y require closer positioning. T h e n u m b e r of propeller
c h a r a c t e r i s t i c s t o m a k e y o u r first flight less c h a l l e n g i n g a n d s a f e , after
b l a d e s s h o u l d a l s o b e s e t . W r o n g s e t t i n g will a f f e c t R P M r e a d i n g s f o r
all y o u m a y h a v e o t h e r f l i g h t c h a r a c t e r i s t i c s t o d e a l w i t h . T h i s s h o u l d
the optical t a c h o m e t e r . For e x a m p l e , fitting a three b l a d e d propellers,
help y o u to e s t i m a t e flight t a k e off d i s t a n c e s , r e c o v e r y f r o m a stall. For
but leaving t h e i-Meter blade figure at 2 w o u l d c a u s e t h e optical
m o r e e x p e r i e n c e d p i l o t s t h i s w i l l e n a b l e t h e m t o c a l c u l a t e if t h e p l a n e is
tachometer to read 5 0 % high.
g o i n g t o b e a b l e t o h o v e r . It c a n s h o w y o u w h a t c h a n g e s t o t h e p o w e r
calculation will be a f f e c t e d b y a different size propeller.
TEMPERATURE
T h e r e is a t e m p e r a t u r e s e n s o r a v a i l a b l e , s o y o u c a n m o n i t o r t h e
t e m p e r a t u r e of battery, motor, electronic s p e e d controller, etc. W h e n
n o s e n s o r is c o n n e c t e d , d i s p l a y will i n d i c a t e 0 . 0 ° C a n d 3 2 ° F
• Connect temperature probe to M e g a Meter
Propeller Length (inch);
THRUST
CALC
0 1 0 . 0 0 Number of Blades
'D i o n e t e r
^propeller's Effectiveness;
1 .00
CF :
[Coefficient
j
2
'
B l a d e s :
110 0 0
RPM :
Propeller Revolution j
T h r u s t :
E 53K9
RPM (Revolutions
3 . H2HLb
Per Minute)
j
1.
• Press ' M O D E ' to select " T E M P E R A T U R E "
C F (Propeller's Effectiveness Coefficient Table)
• Press " E N T E R " to confirm selection
Current Temperature
Cc
Celsius
TEMPERATURE
C u r r e n t
89 F
Current Temperature
Fahrenheit
Peak
1
Peak Value
Celsius
22F
: Peak Value
Fahrenheit
Manufacturer
Standard propeller
CF
1.00
A P C propeller
1.06
APC SF
1.50
A P C W propeller
1.09
M e n z S propeller
1.03
B a m b u l a propeller
1.02
Bolly c l u b m a n
1.04
Cox
1.10
GWS HD
0.75
G W S RS (SF)
1.10
Smart
1.02
Zinger W o o d
1.00
15
PRODUCT SPECIFICATIONS
T h e s t a t i c t h r u s t c a l c u l a t i o n is t a k e n f r o m t h e O c t o b e r 8 6 A M A m a g a z i n e ,
a i r d e n s i t y is b a s e d o n 2 9 . 9 2 in H g , a n d p r o p e l l e r p i t c h is n o t u s e d in t h i s
c a l c u l a t i o n . P r a c t i c a l t e s t s r e v e a l e d v e r y little if a n y c h a n g e in t h r u s t d u e
t o p i t c h v a r i a t i o n at t h e s a m e R M P .
It is b e l i e v e d t h a t t h i s is p a r t l y d u e t o a n y i n c r e a s e in t h r u s t b e i n g n e g a t e d
b y b l a d e s t a l l i n g a n d a m o r e t u r b u l e n t influx a r e a w i t h i n c r e a s e d p i t c h .
T h i s o b v i o u s l y only applies to static conditions, not flying conditions.
PRODUCT SPECIFICATIONS
• M a x input voltage: 6 0 V
• V o l t a g e measurement range: 2-8S LiPo/LiFe/Lilon
• Voltage display resolution: 0.001V
• V o l t Port: 2 . 5 4 m m pitch pins, 9 pins
• M a x current: 1 0 0 A
• Shunt resistance^.001 o h m
• Displayed resolution A: 0.01
• Temperature resolution: 1 Celsius / 1 Fahrenheit
• P P M signal output: 7 5 0 u S -
2150uS
• N u m b e r of propeller measurable : 1 to 5
• Propeller rotating range:
1-60000RPM
• Dimension: 95.3x72.8x21 5 m m
• Net Weight: 85g
WARRANTY AND SERVICE
W e g u a r a n t e e this p r o d u c t to be free of m a n u f a c t u r i n g a n d a s s e m b l y
defects for a period of o n e y e a r f r o m t h e time of p u r c h a s e . T h e w a r r a n t y
only applies to material or operational defects, w h i c h are present at the
t i m e o f p u r c h a s e . D u r i n g t h a t p e r i o d , w e will r e p a i r o r r e p l a c e f r e e o f
service charge for products d e e m e d defective d u e to those causes.
Y o u will b e r e q u i r e d to p r o d u c e p r o o f o f p u r c h a s e (invoice o r receipt).
T h i s w a r r a n t y is n o t v a l i d f o r a n y d a m a g e o r s u b s e q u e n t d a m a g e
arising a s a result of misuse, modification or a s a result of failure to
o b s e r v e t h e p r o c e d u r e s o u t l i n e d in t h i s m a n u a l .