Snap-On 5000-ST - Manual (Page 43)

CALIBRATION CHAPTER 5
5-42
How to Use Analog Output (Rear Panel BNC Connector)
Analog Output on the SURETEST provides a real time voltage level that is
directly proportional to the torque applied to the transducer. It is useful for
direct driving equipment such as analog plotters and chart recorders, or
interfacing to a computer/controller with analog to digital (A/D) data acquisition
capability. Maximum output loading must be less than 5 mA.
The output varies between approximately +1.8 volts, full clockwise (CW) torque
applied and approximately -1.8 volts, full counter clockwise (CCW) torque
applied. Zero offset is within ±100 mv. Linearity is better than ±1% of
reading.
When used with the 4-in-1 transducer, zero output varies with the scan of the
four transducers. Select one of the four by applying at least 5% of its full range
torque to it. Press ENTER to return to scanning.
1. To program the SURETEST Base Unit, refer to Chapter 3—Set Up and
Programming. Use SET HIGH and SET LOW limit alert, data
STORE, display CLEAR, printer SEND and STATistical analysis
features.
2. Press Select Mode to select the TRACK mode.
3. Connect the recording or monitoring equipment to the ANALOG
OUTPUT port using a BNC coaxial connector.
4. With no torque applied, measure the ANALOG OUTPUT voltage and
adjust or program your equipment for zero.
5. Apply full range torque to the transducer in the CW direction.
6. Measure the ANALOG OUTPUT voltage and adjust or program your
equipment to display the full range torque value.
7. Apply full range torque to the transducer in the CCW direction.
8. Measure the ANALOG OUTPUT voltage and adjust or program your
equipment to display the full range torque value.
CHAPTER 5
Calibration
The SURETEST Torque Calibration System is factory calibrated using
precision torque test arms, certified weights and laboratory grade
equipment. SURETEST series transducers must be positioned
horizontally, with torque applied within ±15 degrees of horizontal.
This chapter contains calibration instructions and information for the
SURETEST ystem.