The PRO-CHK digital torque meter is used for torque calibration and checking of electric screwdrivers and automatic screw tightening machines. Measuring range is 20–5000 mN·m (0.204–51.02 kgf·cm) with ±0.5% accuracy. It offers four measuring modes (PP / PD / CT / TR) and pass/fail judgment against upper and lower limits, stores 800 readings and outputs data in ASCII format.
Calibrate Your Electric Tools
The torque output of an electric screwdriver changes with use: clutch wear, spring fatigue and growing play in drive components all cause the actual output to drift away from the set value. This drift does not show at the moment of tightening and is often discovered only when finished products show loose screws or stripped threads. Regular measurement with a torque meter is the most direct way to confirm that a tool is still within its acceptance range.
The PRO-CHK digital torque meter has a measuring range of 20~5000 mN·m (0.204~51.02 kgf·cm) and ±0.5% accuracy, and can measure in both CW and CCW directions. Once upper and lower limits are set, results are judged directly by indicator lights (green for OK, flashing red for NG), so operators can complete checks without reading values.
Product Specifications
Four measurement modes serve different verification purposes: PP (peak) mode captures the maximum torque over the entire tightening process and suits routine checks; PD (peak-down) mode captures the value as the torque drops after peaking and suits tools with clutch-trip behavior; CT mode outputs data in real time for logging on a PC; and TR (track) mode records the torque-over-time trace for analyzing abnormal tightening.
The unit stores 800 measurements and displays the maximum, minimum, average and data count. Measurement data can be output in ASCII format (Baudrate 19200) and kept as audit records. It is powered by a rechargeable NiCd battery that charges fully in about 3 hours and runs continuously for about 12 hours, and it shuts off automatically after 10 minutes of inactivity.
Models and Specifications
| Item | PRO-CHK |
|---|---|
| Measuring range | 20~5000 mN·m (0.204~51.02 kgf·cm) |
| Accuracy | ±0.5% (±3 digits at 499 digits or less) |
| Display | 4-digit LCD |
| Measuring direction | CW / CCW (clockwise and counterclockwise) |
| Measuring modes | PP (peak), PD (peak down), CT (real-time data output), TR (track) |
| Upper / lower limit setting | Both upper and lower limits can be set within the measuring range |
| Pass/fail judgment | Indicated by lamp in P mode: OK green, NG flashing red |
| Statistics display | Maximum, minimum, average and number of readings |
| Data memory | 800 readings |
| Data output | ASCII format (baud rate 19200) |
| Auto-clear time | Auto reset to zero after 0.1~3.0 s (0.5 s steps); manual reset when set to 0.0 |
| Battery | NiCd battery 1.2V × 5 cells (700mAh), rechargeable more than 300 times |
| Auto power-off | Powers off automatically after 10 minutes idle |
| Charging and operating time | Fully charged in about 3 hours; about 12 hours of continuous use |
| Dedicated charger | Input AC100V~240V 50/60Hz; output DC12V |
Typical Applications
Periodic verification of line tightening tools
With a measuring range of 20–5000 mN·m and ±0.5% accuracy, it confirms the actual torque output of electric screwdrivers and automatic screw tightening machines before a line starts, and the indicator lamp shows directly whether the result is within the acceptance range.
Measurement records for quality audits
Stores 800 readings and shows the maximum, minimum and average values. Data is output in ASCII format and can be kept as audit records.
Verification that requires observing torque behavior
Four measuring modes — peak, peak down, real-time output and track — let you observe either the torque peak or the torque trace over time, depending on the purpose of the verification.
Frequently Asked Questions
What is the measuring range and accuracy of the PRO-CHK torque meter?
The measuring range is 20~5000 mN·m (approx. 0.204~51.02 kgf·cm), accuracy is ±0.5% (±3 digit at 499 digit or below), readings are shown on a 4-digit LCD display, and it measures in both CW and CCW (right and left) directions.
When should each of the four PRO-CHK measurement modes be used?
PP (peak) records the maximum torque over the whole process and is the most common way to verify tightening torque. PD (peak down) is used to observe how torque decays after reaching its peak. CT (real-time data output) continuously outputs measured values, suited to continuous monitoring or external recording. TR (track) traces how torque changes over time. Switch modes according to the purpose of verification.
Can the PRO-CHK give a direct pass/fail judgment? Can the data be stored?
Yes. Upper and lower limits can both be set within the measuring range, and in P mode the result is judged directly with indicator lights: green for good (OK) and flashing red for no good (NG), with a buzzer alarm for each judgment state. For data, 800 measurements can be stored, with maximum, minimum, average and record count displayed, and output for storage in ASCII format (Baudrate 19200). In real-time output, the applied load torque can be switched to data output approximately every 1/180 second.
How long does the PRO-CHK battery last? Does it need frequent charging?
It uses a 1.2V × 5-cell NiCd battery (700mAh) rated for more than 300 charge cycles. A full charge takes about 3 hours and provides about 12 hours of continuous use. It turns off automatically after 10 minutes of inactivity to save power. The dedicated charger has an input of AC100V~240V/50-60Hz and an output of DC12V. An auto-clear function can be set to reset automatically after 0.1~3.0 s (in 0.5 s increments); setting it to 0.0 switches to manual reset, which is automatic and one-touch.
Is the PRO-CHK digital torque meter the same as a torque tester or torque calibrator?
Yes. Digital torque meters are also commonly called torque testers, torque checkers or torque calibrators; they all measure the actual torque output of an electric screwdriver or tightening spindle to confirm it is within the set range. The PRO-CHK measures 20~5000 mN·m with ±0.5% accuracy, judges OK/NG against upper and lower limits and stores 800 readings, suited to daily checks and periodic verification of low- to mid-torque electric screwdrivers.