"Vitrek offers two series of electrical safety testers--95x and V7x (Figure 1)--that each perform hipot tests as well as insulation-resistance (megohms
), ground-resistance (milliohms), and ground-bond tests," he said.
* SDM3045X DMM will make measurements of True-RMS AG voltage and AC current, resistance to 10 megohms
, capacitance to 10,000 microfarads, continuity and diode tests, frequency and period measurements, and temperature, with support for thermocouple and RTD sensors
Static wicks are high-resistance devices (anywhere from 6 to 200 megohms
resistance) that have a much lower corona voltage than the surrounding airframe structure they are attached to.
The reformulated 100 percent solids epoxy system fulfills the three criteria relating to flooring as outlined in ANSI/ ESD S20.20, which requires a system resistance of a person through the floor and to ground of less than 35 megohms
. This makes it ideal for locations where electrostatic discharge is a serious cause for concern, such as in laboratories that need to protect sensitive electrical equipment or in areas where flammable materials are handled and in which a fire safe floor is required to prevent static becoming an ignition source.
They provide greater than 5,000 Megohms
at 400 VDC and exhibit no evidence of breakdown or flashover when tested in IAW MIL-STD-1344, Method 3003.
Resistive sensors are very non-linear, and impedance (there is a capacitive component) can vary from many megohms
at 10 percent RH to kilohms at 80 percent RH.
The high-quality pure water produced by the systems has resistivity values typically exceeding 15 Megohms
cm at 25 C, <30 ppb of TOC (Total Organic Carbon) and bacteria levels of <1 cfu/mL.
Measures 200mVDC to 1000VDC, 200VAC to 750VAC, 200 micro AMPS to 10 AMPS, 200 ohms to 2 megohms
. Includes diode and transistor check, auto reverse polarity, zero adjust, overload protection and low battery indicator.
There are reports on the input resistance values ranging from tens of kOhms to ten megohms
in the cardiac tissue [17-21].
Units are ohms or megohms
= [10.sup.6] ohms).