Pinion WSST-300 Quick start guide

Pinion Products Corporation Inc. ____________________________
WSST-300
WRIST STRAP SYSTEMS TESTER
OPERATIONAL
MANUAL
IMPORTANT!! READ THIS MANUAL BEFORE OPERATING
UNIT!!

WSST-300
WRIST STRAP SYSTEMS TESTER
The Voyager wrist strap system tester model WSST-300 is manufactured by Pinion Products Corporation
and designed to permit a fast, simple, safe, and convenient means to test the integrity of the total static
dissipative wrist strap systems. All of the elements of the wrist strap system; continuity of the strap,
integrity of the strap protective resistor and satisfactory strap to skin contact is confirmed by simply
depressing the top cover of the tester. The WSST-300 tests the operator for a resistance to ground greater
than 750K ohms and less than 10 or 100 megohms, depending on the range selected with a switch. The
upper limit tests whether static is being effectively dissipated from the operator. The lower limit of 750K
ohms is considered a minimum for reasons of personnel safety. The WSST-300 may also be used to test
other grounding methods such as ankle straps or heel straps with conductive flooring.
OPERATING INSTRUCTIONS
The WSST-300 should be located on or near a workstation. Installation of the WSST-300 consists of
connecting the post on the back of the unit to ground using the wire provided and selecting the desired
range for the upper limit. The upper limit should be selected based on the ESD sensitivity of the
components being handled by the operator. The WSST-300 case must be isolated from ground, with only
the rubber feet touching the work surface. Operators should test their wrist strap system several times a
day.
To operate the WSST-300, simply depress the top cover of the unit while the wrist strap is being worn. A
tone and green light indicates that the wrist strap system (person, strap, and ground connection) is
effectively dissipating charge. The tone will come on only when the green light is on. An amber light
indicates a resistance too high (greater than the upper limit of 10 or 100 megohms) to satisfactorily
dissipate static charges within desired time limits. A red light indicates the resistance to ground is below
the lower limit of 750K ohms.
The WSST-300 may be used to test just the wrist strap. This test is performed by pressing the operator end
of the strap to the top plate of the unit while the ground end of the strap is connected to the post on the back
of the unit. The lights and the tone indicate the same information for the resistance of the wrist strap.
TROUBLESHOOTING
Most apparent problems with the WSST-300 can be traced to a weak or dead battery, or improper ground
connections.
While depressing the lid, if the light levels are low, there is no tone when the green light is on, or there are
no light or tone, the 9-volt battery should be replaced. To replace the battery, remove the 4 screws on the
sides of the unit and lift the lid off. Replace the battery and reassemble the unit, making sure the lid still
pivots on the screws.
If test results seem to be wrong, check that the unit and the wrist strap are grounded properly. They should
be attached to a common ground. The WSST-300 ground wire should be checked for continuity and the
wrist strap should be tested separately for its specified resistance. If all of this checks out, return the unit to
Pinion Products Corporation for calibration.

SPECIFICATIONS
Parts included: WSST-300 unit
Ground wire (7ft, with alligator clip on one end)
Documentation (instruction sheet)
Resistance Tolerances:
Lower Limit - 750K ohms ±10%
Upper Limit - 10 megohms ±15%
100 megohms ±20%
Battery: 9 volts (battery life> 3 yrs typical for 10 tests/day)
Test Voltage: 7.6 volts normal
CALIBRATION CHECK
The calibration of the WSST-300 should be checked every year, using the procedure defined here or using
the Pinion Products Corporation, WSST-CAL calibration check unit. The WSST-300is checked for
calibration by checking the test results for resistances at each of the three possible limits, at the extremes of
the tolerance values. The following resistance values should be used, giving the results listed. The
resistance used should be within the tolerances listed. Perform the test by connecting one end to the
resistor to the post on the back of the unit and the other end to the lid of the unit, while depressing the lid to
activate the unit.
Lower limit (750 KΩ) 675KΩ(±1.0%) red light no tone
825KΩ(±1.0%) green light tone
Upper limit (10MΩ): 8.5MΩ(±1.5%) green light tone
11.5MΩ(±1.5%) amber light no tone
Upper limit (100MΩ): 80MΩ(±4%) green light tone
120MΩ(±4%) amber light no tone
Contact Pinion Products Corporation for further technical assistance in the case that the calibration does not
check out.
RELATED PRODUCTS
Pinion Products Corporation offers the following related products:
GST-400 Ground System Tester (WSST-300with work surface to ground test capability)
WSST-CAL Calibration check unit for WSST-300and GST-400
SRM/110 Surface Resistivity Meter
RTG-210 Resistance To Ground Meter
SRM/RTG Combination Meter
Contact Pinion for information on these and other products offered.