85RF Fluke Electronics, 85RF Datasheet - Page 39

• Manufacturer Part Number: 85RF
• Description: PROBE HIGH FREQ 500MHZ
• Manufacturer: Fluke Electronics
• Type: High Frequencyr

Specifications of 85RF

• Impedance: 10M Ohm
• Voltage - Max: 30VRMS, 200VDC
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Ratings: -
• Current Rating: -
• Color: -
• Termination: -
• Wire Insulation Material: -
• Cable Length: -
• Other names: 532457

Error:
Example:
Max. error in A = (148.56 mV x 148.51 A)/(15000 mV - 148.56 mV)
Max, error in % = 100 x [148.56 mV/(15V - .14856V)] = 1.0003%
Es = Source Voltage
RI = Load resistance + Source resistance
Im = Measured current (display reading in amps)
Eb = Burden voltage (calculated)
Eb = meas. current [(200/current range in mA) + .35]
Error in % = 100 x Eb/(Es - Eb)
Error in A = (Eb x Im)/(Es - Eb)
ES = 15V
RI = 100 k
Im = 148.51 A (.14851 mA)
Eb = 148.51 x 10
Figure 2-11. Calculating Burden Voltage Error
Add 1.486 A to the reading for correct current
= 148.51 x 10
Max. error in % = 1.0003% (.2% + 2 digits)
E
S
Add this to the range spec. accuracy
= 1.486 A
-6
-6
Ammeter Shunt
x 1000.35 = 148.56 mV
x [(200/.2) + .35]
I
M
E
B
Operation Instructions
RI
Operation
dy12f.eps
2-17
2