Cooper DTW 400 User Manual

DTW 400/DTW 405 - Digital Torque Tester/Screwdriver User’s Guide

LIST OF EQUIPMENT

1. Digital Torque Tester/Screwdriver (DTW 400 with CW and CCW ratchet (1/4” female hex)

2. 2 Phillips tips (DTW 405 with CW stepless one-way clutch Phillips tip)

3. AC adapter/charger

4. Carrying case

DTW Digital Torque Tester Ranges Accuracy ± 0.5% F.S., ± 1 LSD

Capacity

Ozf-in Lbf-in Kgf-cm N-cm N-m
DTW 405 0.20~69.50 0.020~4.500 0.020~5.000 0.20~50.00 ­DTW 400 2.0~560.0 0.20~35.00 0.20~40.00 2.0~400.0 0.2~4.000

READ FIRST: SAFETY INFORMATION

For safety, and for damage avoidance, be sure to read this manual thoroughly. The warranty is only valid when
the product is used following the instructions provided within this manual.

• Do not use tester in high temperature, high humidity, or in damp or wet areas.

• Recommended operating temperature is between 0-42ºC (32-100ºF).

• Do not apply torque exceeding the rated capacity (35 lbf-in), regardless of whether the unit is On or Off.

Avoid shock load.

• When charging the battery, be sure to use the provided AC adapter/charger exclusively.

• Do not use lacquer thinner or any solvent to clean the unit.

• Do not disassemble or modify the unit.

1. ON/OFF Switch Press to turn on, press again to turn off (click once, do not hold). After 10 minutes of non ­use the unit shuts off.

2. MODE Select Real Time, PP (Peak) PD (Peak Down), C (Continuous Output Mode)

3. CLEAR To reset display to zero and send data to memory.

4. LCD Display Displays torque value, battery icon, mode & units.

5. GO/NG Indicator Green for values between LO and HI setpoints, flashing red for values above HI, solid
green for data output.

6. DOWN Change values or numeric places.

7. UP Change values or options

8. PRG Enter programming mode or enter values

9. MEM Display memory locations and date

10. STAT Display statistics; number of records, Max, Min and Ave.

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Ratchet Operation CW, CCW and fixed positions
USB virtual COM port Send data to computer via USB cable
Charge Light lights when charging, off when complete
DC IN AC charger/adapter receptacle
RESET System reset button

GENERAL OPERATION

1. Press and hold MODE for one second to select from the following Measuring Modes.

REAL TIME – Displays torque transients (no output or indicator)
PP Mode – Peak, captures peak torque) peak data output, PP appears on the display)
PD Mode – First Peak, capture first peak value, (peak data output, PD appears on the display)
C Mode – Continuous RS-232 out display and output torque transient (180 d ata/sec., C appears on the

display.)

2. Insert Phillips tip into the screwdriver.

3. To select ratchet operation turn the ratchet one click CW or CCW from the center

position. To disable ratcheting, turn it so the semi circle is in the center position.

4. Press the CLEAR button on the display unit to zero the display. Insert the screwdriver

tip into the screw, hold perpendicularly (not at an angle) and turn to measure.

5. After measuring, press CLEAR to zero the display for the next test.

PROGRAMMING

Press POWER to turn on. Press PRG for one second. The display shows “HI” and then
the High setpoint value. This confirms the tester is ready for the following programming
steps:

1. High Setpoint (HI)
After “HI” is displayed and the High setpoint value, press DOWN (6) to move the
numeric place and press UP (7) to select values i.e. 50.0 for 50.0 lf-in, then press
PRG (8) to enter.

2. Low Setpoint (LO)
After High value is entered, “LO” is displayed, then the Low setpoint value. Press
DOWN to move the numeric place and press to select values, then press PRG to
enter.

3. Peak Down Minimum (PdLO)
After Low value is entered, “PdLO” is displayed and then the PdLO value. Press
DOWN to move the numeric place and press to select values, then press PRG to enter.
PdLO sets a minimum torque value for Peak Down mode. For example if “PdLO” value is set at 5.0 lbf-in,
only a reading over 5.0 lbf-in will be measured in Peak Down mode.

4. Continuous Data Output Minimum (CLO)
After Peak Down value is entered, “CLO” is displayed, then the CLO value. Press DOWN to move the
numeric place and press to select values, then press PRG to enter.

CLO sets the start and stop trigger points for continuous data output. When torque reaches the CLO value,
the tester starts to output data and stops if torque falls below the value. NOTE: the display does not show
any value below the CLO minimum.

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