Digital Surface Resistance Meter Kit Installation, Operation and Maintenance

Description

The Desco 19290 Digital Surface Resistance Meter  Kit is an instrument designed to measure resistance point-to-point (Rtt) or surface to ground (Rtg).

Its test functions include:

•     Resistance measurement accuracy of ±10%

•     Resistance range of <1 x 103  ohms to >1 x 1012 ohms

•     Under load voltages of 10 and 100 volts ±5%

•     Electrification period of approximately 15 seconds

The Digital Surface Resistance Meter also measures ambient temperature and relative humidity. Up to 100 measurements may be stored and recalled from the meter's internal memory. This includes the resistance

value, temperature, relative humidity and test voltage at the time of the measurement.

•     Compliance Verification - ESD TR53 - Resistance Measurements

•     Worksurfaces - ANSI/ESD S4.1 Worksurfaces

•     Floors - ANSI/ESD S7.1- Resistive Characterization of Materials Floor Materials

•     Foot Grounders - ESD SP9.2 - Foot Grounders Resistive Characterization

•     Garments - ANSI/ESD STM2.1 Garments Seating - ANSI/ESD STM12.1- Seating - Resistive Measurement

•     Floor/Footwear - ANSI/ESD STM97.1 - Floor Materials and Footwear- Resistance Measurement in Combination with a Person 

“A Compliance Verification Plan shall be established to ensure the Organization’s fulfillment of the technical    requirements of the ESD Control Program Plan. Process monitoring (measurements) shall be conducted in accordance with a Compliance Verification Plan that identifies the technical requirements to be verified, the measurement limits and the frequency at which those  verifications shall occur. The Compliance Verification   Plan shall document the test methods and equipment used for process monitoring and measurements. If the test methods used by the Organization differ from any of the standards referenced in this document, then there must be a tailoring statement that is documented  as part of the ESD Control Program Plan. Compliance   verification records shall be established and maintained to provide evidence of conformity to the technical requirements. The test equipment selected shall be  capable of making the measurements defined in the Compliance Verification Plan.” (ANSI/ESD S20.20section 7.3)

Calibration

Frequency of recalibration should be based on the

critical nature of those ESD sensitive items handled

and the risk of failure for the ESD protective equipment and materials. In general, Desco recommends that

calibration be performed annually.

In-house calibration can be performed by using ±1%

tolerance resistors in each of the meter's decade

ranges. Connect the resistors to the test leads using

clips and record the meter’s display. Minimize crossing the test leads when possible. Contact Desco Customer Service should adjustments be necessary. Special

equipment is required to adjust the meter.

Required Equipment

•     Digital Multimeter (±1.25% accuracy @10VDC and 100VDC)

•     Resistance Decade Box with a range of 10³ to 1012 ohms (±2% accuracy @ 10³ to 1010  ohms; ±5%

accuracy @ 1011  to 1012  ohms)

•     Thermometer (±1°F accuracy)

•     Relative Humidity Meter (±2% accuracy)

•     99% Isopropyl Alcohol and Cleaning Wipes