Appendix B(1) Specifications for Serial Nos. 001 through 032
· Accuracy: 0.3 percent plus or minus 5 least significant digits
· Switching frequency: 30 Hertz plus or minus 0.01 percent (optional 25 Hertz)
· No mechanical relays
· No nonpolarizing electrodes required for either resistivity or IP modes
· Transmitter maximum compliance voltage: over 400 volts
· Transmitter waveform: square wave with exact 50% duty cycle
· Measurement range: selectable, 0 to 200 ohms or 0 to 20,000 ohms
· Transmitter constant current choices: 0.50 milliamps or 5.0 milliamps
· Input resistance: 200 Megohms (s/n 001-014: 20 Megohms)
· Operating temperature range: -10 to +50 degrees Celsius (limited by LCD)
· Storage temperature range: -20 to +75 degrees Celsius
· Housing: water tight, high-impact plastic
· Display device: 4.5 digit LCD Digital Panel Meter
· Dimensions: 36.3 x 27.4 x 15.8 cm (14.3 x 10.8 x 6.2 inches)
· Weight: 4.3 Kilos (9.5 pounds)
· Impact resistance: will sustain a drop of one meter to a concrete surface
· Power source: four “D” alkaline batteries
· Readings per set of batteries at room temperature: 20KW range – 2,500 readings
200W range – 1,250 readings
· Typical resistance mode capability: Provides accurate Wenner Array resistivities with “a” spacings up to 200 or more feet.