ETS 850 User manual

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SURFACE RESISTANCE PROBE
MODEL 850
OPERATING INSTRUCTIONS

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1.0 GENERAL
The Model 850 Surface Resistance Probe is used wherever a 5 lb. probe with
2.5” (63.5mm) diameter electrode is required to make resistance measurements.
The contact electrode is a conductive silicone elastomer with a hardness of 60±
10 durometer and contact resistance less than 500 ohms.
The Model 850 can be used either singularly for measuring resistance to ground
(RTG) or in pairs for measuring point-to-point (pt-pt) resistance. It can be used
with any resistance meter (ohmmeter) having the required test voltage and range
requirements. The Probe meets the requirements of ANSI/ESDA, IEC, NFPA 99,
ASTM F150 as well as DOD and other standards to which the probe is
referenced.
2.0 SET UP
The Model 850 Probe has a standard 0.162’ (4mm) banana jack in the top for
connection with a standard banana plug. The Probe is connected to the
resistance meter as shown in Figure 1 for resistance to ground measurements
(RTG) and in Figure 2 for point-to-point resistance (pt-pt) measurements.
Figure 2: Resistance-to-Ground meter connection

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Figure 3: Point-Point meter connection
The Probe can only be used on smooth, flat surfaces. To make a measurement,
place the Probe(s) on the surface in accordance with the layout or spacing
specified in the standard being used. Apply the test voltage for several seconds
and then take a reading. If the measured resistance is greater than 1010 ohms
then a longer electrification time may be required before taking a reading. Do not
touch the Probe(s) while the test voltage is applied. A shock hazard is present
when test voltages of 100 volts or more are used. If the rubber electrode
becomes dirty, it can be cleaned by with isopropyl alcohol. Allow the electrode to
dry prior to placing it on the test surface.
CAUTION:
Do Not Touch Electrode At Voltages 100 Volts and Above.

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3.0 WARRANTY
Limited Warranties. Seller warrants that all goods manufactured and delivered
hereunder shall (a) conform to any samples, drawings, specifications or other written
documents provided to Seller by Buyer, or approved by Buyer to Seller and (b) be
free from all defects in workmanship and material. Buyer’s sole remedy against
Seller for breach of either of the specifically mentioned warranty shall be the repair
or replacement, at Seller’s sole option, of the defective workmanship or material.
Seller expressly disclaims all other warranties, express and/or implied, including but
not limited to those of merchantability and fitness for a particular purpose.
In no event shall Seller be liable, under either warranty or otherwise, to Buyer in
excess of the purchase price of the products paid to Seller by Buyer. In no event
shall Seller be liable for any loss or damage arising directly or indirectly from the use
of the product or for consequential or incidental damages. Seller’s specified
warranties will expire and lapse (i) for renewable items (such as gloves, iris ports
and desiccants), sixty (60) days from date of shipment and (ii) for all standard
equipment and otherwise nonrenewable items, one year from date of shipment.