Nidec DT-311D Manual de usuario
M&L Testing Equipment
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DT-311D Line Powered Digital Stroboscope
Operation Manual
Don’t look directly into the light Source. This may result in eye injury.
Don’t use or store in the following environments: Direct sunlight, con-
densation, dust or caustic.
Do not alter, or modify. Such action may cause damage and void war-
ranty.
Operate with 0-35°C (32-95°F), 35-85% RH. Use outside of this range
may alter the unit’s performance.
SPECIFICATIONS
Flashing Range: 60-12,000 fpm (flashes per minute)
Accuracy: ±0.01% F.S.
Resolution: 0.1 from 60-6,000; 1 from 6,001-12,000
Display: 5 digits 0.4” (10 mm) height
Flashtube Power/Life: Xenon ≤ 45W / 50,000,000
Flash Duration: 10-30 μs automatically adjusts with flash rate
External Trigger Input: 5 V dc ~ 12 V dc pulse signal input
(high level trigger) from sensor
Sensor Power Supply: 12 V dc up to 50 mA
Lux Rating: 8” (20 cm) Distance = 1550 lx @ 1500 fpm, 2350 lx
@ 6000 fpm with 15.5” (400 mm) irradiation diameter.
20” (50 cm) Distance = 650 lx @ 1500 fpm , 580 lx @ 6000 fpm
with 23.5” (600 mm) irradiation diameter
Sensor Power Supply: 5-12 VDC up to 50 mA
Battery Life: 1.5 to 2 hours depending on settings
Time to Charge Battery: 5 hours to full charge
Power Requirement: 85-240 VAC 50/60 Hz
Operating temperature: 32° – 104°F (0 – 40°C)
Dimensions: 8.3 x 4.7 x 4.7” (210 x 120 x 120 mm)
Product Weight: 2.2 lb (1.0 kg)
Package Weight: 2.6 lb (1.2 kg)
Warranty: 1 Year
Certification: CE, RoHS
Included Accessories: Top & bottom handles, 9.8’ (3 m) power
cable, 3 pin female M16 theaded connector
The DT-311D is a portable, highly stable, industrial-quality strobo-
scope for non-contact inspection and observation of moving parts
by providing the user the illusion of stopped or slowed down equip-
ment movement. Constructed with a rugged, metal enclosure, the
DT-311D’s withstand harsh industrial usage. The universal pow-
er range (85-240 VAC) allows one model to be utilized on various
power voltages in a multitude of countries. The included top and
bottom handles aid in portability and usage flexibility. The control
adjustment settings allow the flash rate to be readily altered by the
user to visually inspect rotating or reciprocating machinery such as
gear teeth, rotors, shafts, rewinders, printing presses, etc. all with-
out stopping production. These features make the DT-311D ideal for
quality inspection and preventive maintenance of automated motion
equipment.
FEATURES & FUNCTIONS
Display
FPM Flash speed indication in flashes per minute
HZ Flash speed indication in Hz
INT Operation in internal user settings mode
EXT Operation in external sensor input settings mode
Function Keys
SIG Signal selection. Press this key to switch between
internal and external signal operation
MODE Switches between Hz and FPM
+ Increases the frequency (internal trigger mode only)
- Deceases the frequency (internal trigger mode only)
×2 Multiplies the flash rate/frequency by a factor of 2
(internal trigger mode only)
÷2 Divides the flash rate/frequency by a factor of 2
(internal trigger mode only)
EXT External trigger Input
ON Switch on button
2
OPERATION
The Use of Internal Trigger
Turn the power on. The system enters the internal trigger mode.
Turn the encoder knob, or press the “+” “-” keys to adjust the
strobe frequency or flash speed so that detected the object ap-
pears stationary. Use “× 2” “÷ 2” keys to make large changes to
the flash frequency.
To measure true revolutions per minute (RPM) by Marking:
1. “Mark” the object to be measured by either visually noting an
inherent distinguishing characteristic (such as a label, scratch,
etc.) or physically marking the object with a small piece of tape,
pencil mark, etc. If the object has a uniform shape, such as multi
blade fan or the shaft of a motor, you should give it an identifying
mark with reflective tape or paint to distinguish its direction.
2. Turn power switch on.
3. Set flash rate to the highest value and adjust downward.
4. The true RPM can be noted once the action appears frozen and
the first single image of the “mark” appears (see chart below and
accompanying diagram for further explanation).
5. To verify RPM reading, press “÷2”; a single image should ap-
pear again.
To measure true revolutions per minute (RPM) without Marking:
This example explains that if the object has a suitable, unique
shape, then the actual speed of the object may not need to be
determined by marking the object.
In this example, the rotation is below 7000 rpm, the following har-
monic image appears:
EXT AC85~240V
Harmonic images at 6000 and 4000 rpm are not a single still im-
age, but double and quadruple. Single image appears at 3000
and 1500 rpm. 1500 is half of 3000 and the same single image
appears, therefore, the actual speed of the object is 3000 rpm.
The Use of External Trigger
When in EXT mode: In this mode, the flash trigger signal frequen-
cy or flash rate speed is automatically adjusted according to an
external sensor’s input signal.
Wiring of the external sensor is as follows:
1: +12 V dc up to 50 mA
2: Ground
3: Trigger signal 5 - 12 V dc
3
TROUBLESHOOTING
Actual Speed
RPM
Strobe
Frequency
FPM
Multiple Number of
Still Images
3000 12,000 4 4
3000 9,000 3 3
3000 6,000 2 2
3000 3,000 1 1
3000 1,500 1/2 1
3000 1,000 1/3 1
Issue Troubleshooting Methods
Unit does not work
and no display
Check the power supply is proper
Power Switch is functioning
Whether internal fuse is burn out,
check and replace
Unit does not work
but displays properly
Silicon controlled rectifier / optical
coupler (IRF840/521-1) need
replacement
Strobe flashtube needs to be replaced
Check if unit is in external trigger mode
Does not flash under
external trigger mode
Check if the trigger sensors are
working properly
Flashes intermittently
Flashtube needs to be replaced
Flash but the flash
is darker or dimmer
than typical
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