The model 291 is a portable, battery-operated survey instrument for evaluating the resistive properties of static control products such as static dissipative packaging, flooring, or work surfaces over the range of 10E3 to 10E12 ohms or ohms per square.
The model 291 uses a parallel electrode configuration conforming to ASTM D-257. It also accepts external electrodes for point-to-point and resistance-to-ground measurements. A test lead is included for resistance-to-ground measurements. Model 291 is convenient and easy to use. Simply place the 291 directly on the item to be measured. An easy-to-read, color-coded LED decade display quickly and clearly indicates the resistivity or resistance range.
Features：
12 LED Color-Coded Display -Accurately and quickly shows measured decade values
Measures Both Resistivity and Resistance to Ground
Ranges E3 Thru E12
Easy to Use
Battery Powered
Pocket -sized Convenience
CE Conformance
Inexpensive, Reliable
Exclusive Monroe Electronics Two- year Warranty
Range:103 to 1012 with LED’s for under-range and over-range
Accuracy:±1/2 decade
Temperature:00 to 400C
Humidity:10% to 75% RH
Applied Voltage: 10 volts at 103 to 105
100 volts at 106 to 1012
Display Type:Multi-colored LED’s (green-conductive, yellow-dissipative and red-insulative)
Electrodes:Parallel bar type (jacks for external connections)
Battery Type:9 volt, Eveready #522 or equivalent NEDA #1604A
Dimensions:2.6 x 5 x 1.2 inches (6.5 x 13 x 3 cm)
Weight:8.4 oz (235 gm) including battery
