User manual
Digital pitch gauge
No. 40001RC Version 06/11
INTENDED USE 1.
The pitch gauge is designed for application in model helicopters and serves to measure the rotor blade pitch
value. The pitch gauge is powered by two CR2032 button cells. Only operate it in dry indoors.
For safety and approval purposes (CE), you must not rebuild and/or modify this product. If you use the product
for purposes other than those described above, the product may be damaged. In addition, improper use can
cause hazards such as short circuiting, re, electric shock etc. Read the instructions carefully and keep them.
Make this product available to third parties only together with its operating instructions.
DELIVERY CONTENT2.
Pitch gauge >
Mounting plate >
CR2032 button cell x 2 >
Operating instructions >
SAFETY INSTRUCTIONS3.
Read the operating instructions carefully and especially observe the safety information. If
you do not follow the safety instructions and information on proper handling in this manual,
we assume no liability for any resulting personal injury or damage to property. Such cases
will invalidate the warranty/guarantee.
Persons / Product
The device is not a toy. Keep it out of the reach of children and pets. >
Do not leave packaging material lying around carelessly. These may become dangerous playing material >
for children.
Protect the product from extreme temperatures, direct sunlight, strong jolts, high humidity, moisture, >
ammable gases, vapours and solvents.
Do not place the product under any mechanical stress. >
If it is no longer possible to operate the product safely, take it out of operation and protect it from any >
accidental use. Safe operation can no longer be guaranteed if the product:
is visibly damaged, -
is no longer working properly, -
has been stored for extended periods in poor ambient conditions or -
has been subjected to any serious transport-related stresses. -
Handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product. >
Also observe the safety and operating instructions of any other devices which are connected to the >
product.
Batteries
Correct polarity must be observed while inserting the batteries. >
Batteries should be removed from the device if it is not used for a long period of time to avoid damage >
through leaking. Leaking or damaged batteries might cause acid burns when in contact with skin, therefore
use suitable protective gloves to handle corrupted batteries.
Batteries must be kept out of reach of children. Do not leave the battery lying around, as there is risk, that >
children or pets swallow it.
All the batteries should be replaced at the same time. Mixing old and new batteries in the device can lead >
to battery leakage and device damage.
Batteries must not be dismantled, short-circuited or thrown into re. Never recharge non-rechargeable >
batteries. There is a risk of explosion!
Miscellaneous
Consult an expert when in doubt about operation, safety or connection of the device. >
Maintenance, modications and repairs are to be performed exclusively by an expert or at a qualied >
shop.
If you have questions which remain unanswered by these operating instructions, contact our technical >
support service or other technical personnel.
OPERATING ELEMENTS4.
1 2
3
4
5
6
7
8
9
10
Mounting plate1.
Pitch gauge2.
Rotor blade holder3.
Button ON/OFF4.
Button HOLD5.
Button ZERO6.
Relative reading indicator7.
Absolute reading indicator8.
LC Display9.
Battery compartment10.
INSERTING / CHANGING BATTERIES5.
When the battery voltage is low, the display shows the word ”LoBatt” every three seconds. Change the
batteries when it appears.
Open the battery compartment by removing the two screws at the back of the pitch gauge with a Phillips-1.
head screwdriver.
Remove the battery compartment cover and open the battery compartment.2.
Insert / replace two CR2032 batteries while observing the correct polarity, positive side facing upwards.3.
Close the battery compartment and fasten it with the two screws.4.
OPERATION6.
Different pitch angles
The term “rotor blade pitch angle” denotes the angle that the rotor blade takes on (seen from the side) to the
plane of rotation (displayed by the dotted line).
With a positive rigging angle of incidence, the
helicopter is lifted (ascends) in normal ight position.
With a negative rigging angle of incidence, the
helicopter is lowered (descends) in normal ight
position.
The helicopter hovers if the rigging angle of incidence
is “0”.
Many helicopter models have a slightly negative rotor blade pitch angle for starting. This way, the
rotor can achieve the required rotation speed without lifting the model helicopter up.
Very large negative rotor blade pitch angles are set on aerobic ight helicopters to enable hovering
in supine position.
Basic settings of the rotor head
Before you start testing, you should rst mount the link rods and the servo levers according to the manufacturer’s
details. This allows a rough setting of the rotor blade pitch angles. The exact values of the different rotor blade
pitch values required for ying are also indicated in the model helicopter’s instruction manual.
Turning on the pitch gauge
Remove the plastic sheet on the batteries (for the rst time only).1.
Press the button ON/OFF to turn on the pitch gauge.2.
Performing the measuring
Do not connect the motor while performing the measuring. >
Observe the rotation direction of the rotor when measuring the angle. >
The pitch gauge is designed for clockwise rotor rotation. For clockwise rotor rotation, >
it shows a positive reading when the rotor blade is at a positive rigging angle; it shows
a negative reading when the rotor blade is at a negative rigging angle. For counter-
clockwise rotor rotation, please invert the sign of the reading.
Place the helicopter on an absolutely level and horizontally aligned surface. 1.
Place the pitch gauge on the mounting plate. The position of the pitch gauge will be xed by the magnets 2.
on the pitch gauge and the mounting plate.
Pull the rotor blade holder far enough apart so that you can place the rotor blade into the holder.3.
Both rotor blades must be aligned at exactly 180º towards each other.
The pitch measurement is shown on the display. The display will be ipped when the pitch gauge is turned 4.
upside down. If the surface is not perfectly horizontal, use the relative measurement function to obtain a
0º reference angle.
On/Off
Hold
Zero
ABS
REL
0º
+90º
-90º
For pitch measurement, the pitch curve must set to be linear, and all mixing disabled.
Switch the transmitter and the receiver on and put the pitch control stick into the position in which you want 5.
to measure the pitch angle of the rotor blades. E.g. for hover ight, the pitch should be set at 0° when the
control stick is in the central position and the swash plate at an absolutely exact 90° angle to the main
rotor shaft.
Use the pitch values suggested by the helicopter manufacturer if it differs.
For exact adjustment of the required rotor blade pitch angle, you either have to change the linkage rods on 6.
the rotor head or readjust the pitch curve on the receiver.
These operating instructions are published by CEI Conrad Electronic International (HK) Limited,
28th Floor & 2903-9, Pacic Plaza, 418 Des Voeux Road West, Hong Kong.
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microlming, or the
capture in electronic data processing systems require the prior written approval by the editor. Reprinting, also
in part, is prohibited.
The operating instructions reect the current technical specications at time of print. We reserve the right to
change the technical or physical specications.
© 2011 by CEI Conrad Electronic International (HK) Limited V3_0611-HL
Then also check or adjust the default rotor blade pitch angles for the remaining control stick settings 7.
(minimum and maximum pitch angles).
General maximum pitch angles range between 10° to 18°, with minimum pitch angles ranging
between -18° to -10°.
The values set or determined on the rst rotor blade are then also set or determined on the second rotor 8.
blade.
Using the relative measurement function
The pitch gauge default is to use the absolute measurement (no offset value). The absolute reading indicator
will light up when the pitch gauge is in absolute measurement mode.
Turn the pitch gauge to your desired angle and press the button ZERO. That pitch angle will be used as the 1.
offset value. The relative reading indicator will light up.
Press the button ZERO again to switch back to absolute measurement.2.
Using the hold function
Press the button HOLD to freeze the current reading.1.
Press the button HOLD again to unfreeze the reading.2.
Calibrating the pitch gauge
In order to optimise the performance, calibrate the pitch gauge every time after changing batteries or whenever
you feel necessary.
Detach the pitch gauge from the mounting plate.1.
Press and hold the button ZERO for ve seconds.2.
The display will show “--01--”, which indicates that the pitch gauge is now in calibration step 1.3.
Place and hold the pitch gauge vertically against a wall or any vertical surface, as shown below:4.
On/Off
Hold
Zero
ABS
REL
Pay attention to the orientation of the picture while performing the calibration.
The display will show “--02--”, which indicates that the pitch gauge is now in calibration step 2.5.
Place hold the pitch gauge vertically against a wall or any vertical surface, as shown below:6.
Pitch Gauge
Model No.: DPG-01
Voltage: 6VDC
Power: 0.1W Max
The display will show “--03--”, which indicates that the pitch gauge is now in calibration step 3.7.
Place hold the pitch gauge vertically against a wall or any vertical surface, as shown below:8.
On/Off
Hold
Zero
ABS
REL
The display will show “--04--”, which indicates that the pitch gauge is now in calibration step 4.9.
Place hold the pitch gauge vertically against a wall or any vertical surface, as shown below:10.
Pitch Gauge
Model No.: DPG-01
Voltage: 6VDC
Power: 0.1W Max
The display will show “--05--”, which indicates that the pitch gauge is now in calibration step 5.11.
Place hold the pitch gauge horizontally on the oor or any horizontal surface, as shown below:12.
On/Off
Hold
Zero
ABS
REL
The display will show “--06--”, which indicates that the pitch gauge is now in calibration step 6.13.
Place hold the pitch gauge horizontally on the oor or any horizontal surface, as shown below:14.
Pitch Gauge
Model No.: DPG-01
Voltage: 6VDC
Power: 0.1W Max
The display will show “--07--”, which indicates that the pitch gauge is now in calibration step 7.15.
Place hold the pitch gauge horizontally on the oor or any horizontal surface, as shown below:16.
On/Off
Hold
Zero
ABS
REL
The display will show “--08--”, which indicates that the pitch gauge is now in calibration step 8.17.
Place hold the pitch gauge horizontally on the oor or any horizontal surface, as shown below:18.
Pitch Gauge
Model No.: DPG-01
Voltage: 6VDC
Power: 0.1W Max
Calibration is nished.19.
Turning off the pitch gauge
Press the button ON/OFF again to turn the pitch gauge off. Or it will be turned off automatically after being idle
for three minutes.
DISPOSAL7.
General
In order to preserve, protect and improve the quality of environment, protect human health and
utilise natural resources prudently and rationally, the user should return unserviceable product to
relevant facilities in accordance with statutory regulations.
The crossed-out wheeled bin indicates the product needs to be disposed separately and not as
municipal waste.
Batteries / rechargeable batteries
The user is legally obliged (battery regulation) to return used batteries and rechargeable
batteries. Disposing used batteries in the household waste is prohibited! Batteries/
rechargeable batteries containing hazardous substances are marked with the crossed-out
wheeled bin. The symbol indicates that the product is forbidden to be disposed via the domestic
refuse. The chemical symbols for the respective hazardous substances are Cd = Cadmium,
Hg = Mercury, Pb = Lead.
You can return used batteries/ rechargeable batteries free of charge to any collecting point of your
local authority, our stores or where batteries/ rechargeable batteries are sold.
Consequently you comply with your legal obligations and contribute to environmental protection!
TECHNICAL DATA8.
Operating voltage: 3 V/DC button cell x 2, type CR2032
Current consumption: 3 mA
Resolution: 0.1º
Operating temperature: 0 to +40 ºC
Dimensions (W x H x D): 60 x 37 x 16 mm (pitch gauge)
120 x 68 x 6 mm (mounting plate)
Weight: 48 g