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– 2 – 

1.0 I

NTRODUCTION

Congratulations on your purchase of a Check•Line® DT-311A or DT-315A 
stroboscope/digital tachometer. 

Please read the entire instruction manual thoroughly before initial set-up and
operation; the information contained herein will aid you in operating your 
stroboscope safely and with excellent results.

If upon delivery shipping damage is detected, do not operate the unit. Notify the
shipping carrier immediately for damage claim instructions. Refer to nameplate
and record serial number for future reference. 

Items included with the DT-311A/DT-315A are:

• Handle
• Flash tube removing tool
• AC charger/adapter (Model 315A only)

Optional Accessories:

• Carrying Case

2.0 S

ETUP

The DT-311A and DT-315A may be operated handheld or else mounted on a 
tripod for added convenience. 

To mount the strobe on a tripod (or any other mounting surface), use screw 
1/4 -20unc, length 8mm or shorter for the tripod screwhole on the bottom.

– 11– 

9.0 T

ROUBLESHOOTING

FPM reading is displayed but unit is not flashing:

• Flash tube may need to be replaced. 
(see "Flash Tube Replacement" section).

Stroboscope is in external trigger mode, no flash:

• Check flash tube. Replace if necessary.
• Check for damaged wiring and/or loose pin connections.

Stroboscope is in internal trigger mode, no flash:

• Check flash tube. Replace if necessary.
• Check for damaged wiring and/or loose pin connections..

DT-311A

DT-315A

Summary of Contents for Check Line DT-311A

Page 1: ...th all repacking and shipping expenses to the address below to be borne by the purchaser THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE OR APPLICATION ELECTROMATIC SHALL NOT BE RESPONSIBLE NOR LIABLE FOR ANY CONSEQUENTIAL DAMAGE OF ANY KIND OR NATURE RESULTING FROM TH...

Page 2: ...tube removing tool AC charger adapter Model 315A only Optional Accessories Carrying Case 2 0 SETUP The DT 311A and DT 315A may be operated handheld or else mounted on a tripod for added convenience To mount the strobe on a tripod or any other mounting surface use screw 1 4 20unc length 8mm or shorter for the tripod screwhole on the bottom 11 9 0 TROUBLESHOOTING FPM reading is displayed but unit is...

Page 3: ... PIN 4 0V 16 Power cord DT 311A AC adapter DT 315A 17 Power switch 10 8 0 SPECIFICATIONS INTERNAL MODE Flashing Range 40 0 35 000 FPM flashes per minute Accuracy 0 01 of reading Resolution 0 1 FPM 40 0 4 999 9 FPM 0 2 FPM 5 000 7 999 8 FPM 0 5 FPM 8 000 9 999 5 FPM 1 FPM 10 000 35 000 FPM Phase Shift Use push buttons 360 in 6 seconds Display Update Time 0 2 sec approx Output Signal Synchronous 400...

Page 4: ...f the mark appears see chart below and accompanying diagram for further explanation 6 To verify RPM reading press 2 a single image should appear again Rotation of shaft rpm Number of flashes rpm Flashes rpm shaft Number of stopped images at 1 500 rpm 6 000 4 times 4 4 500 3 times 3 3 000 2 times 2 1 500 1 times 1 750 1 2 times 1 500 1 3 times 1 9 7 0 FLASH TUBE REPLACEMENT When FPM reading is disp...

Page 5: ...G until EXT lamp turns on 5 Press MODE to select proper mode FPM Light will flash in correspondence with input signal the input signal will be calculated into FPM and displayed deg One cycle of input signal is 360 A delayed angle will be displayed from 0 up to 359 The delayed angle can be changed by turning the knob setting as previously described msec The above delayed angle will be displayed in ...

Page 6: ...ill be flashing deg lower dashes msec If the input signal is lower than 0 67Hz the lower dashes on the digital display will be flashing deg lower dashes msec 7 5 0 CHANGING MEMORY PARAMETERS The following parameters are set at the factory Decimal point autorange Internal timer continuous External trigger edge L H Lo to Hi These parameters can be changed in the field to facilitate different situati...

Page 7: ...ITAL TACHOMETER STROBOSCOPE Operating Instructions CHECK LINE BY ELECTROMATIC Distributed by ABQ Industrial LP USA Tel 1 281 516 9292 888 275 5772 eFax 1 866 234 0451 Web https www abqindustrial net E mail info abqindustrial net ...

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