SRM3000英文说明书(表面电阻测试仪)
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SURFACE RESISTANCE CHECKER
The SURPA-385 instrument test both surface resistivity and resistance to ground.Giving simple repeatable measurements of conductive,static dissipative and Insulative surface.The checker emloys the ASTM standard D-257 method of parallel bar sensing.Ranging is automatic due to the use of high speed OP-AMP Integrated circuits being linear,with change over points + or – 1/2 dcade on a logarithmic scale (lor-10% from mean value per unit).
Operation of SURPA
Remove the battery compartment and panel and check that a good quality PP3 Alkaline battery has been fitted.Hold the checker away from any surface and press the test button;the Insulative red LED light.
Place the checker onto the surface that requires testing,again press the test button and hold.The LED that illuminates constantly is the decade measured.
10/3 =1kilohm Green LED
10/4 =10kilohms Green LED
10/5 =100kilohms Green LED
10/6 =1megohm Yellow LED
10/7 =10megohms Yellow LED
10/8 =100megohms Yellow LED
10/9 =1,000megohms Yellow LED
10/10 =10,000megohms Yellow LED
10/11 =100,000megohms YellowLED
10/12 =1,000,000megohms Red LED
>10/12 =Insulative RedLED
Checking Resistance to ground
Insert the ground/Earth leakage lead into the ground/Earth leakage socket. This is lates the test probe on the right side of the meter.(the same blue as the socket).Connect the croc clip to your ground connection.
Place the checker on to the surface to be tested, press and hold the test button. The LED that illuminates constantly is the decade measured. The measurement will be resistance to ground in ohms instead of ohms per square.
Calibration
The checker should be calibrated on average every 12months.A test resistance can applied across the parallel bars to verify if the checker is within spemfication, using a resistance decade box. Calibration can be obtained by contacting your supplier.
Specification
Power supply 9 volt PP3 alkaline battery
Test V oltage Nominal 9 volts
Temperature Range
Operating 40 0F to 120 0F
（5 0F to 49 0F）
Storage (-15 0C to +60 0C)
Relative Humidity 0% to 90% (non-condensing)
Resolution One order of magnitude
Changeover Point 1/2 decade on a logarithmic scale (3.16×10n)
Changeover Point Accuracy +/-1/2 decade
Accuracy +/-10%
Repeatability +/-5%
Weight 6 ounce
Dimensions 130mm ×70mm ×25mm