Fluke 85RF II Instruction Sheet Download Page 6

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Probe Disassembly 

Use this procedure to access the internal components of the 
Probe which includes the R2 calibration adjustment. 

1. Remove the bend relief screw and move it away from the 

Probe. 

2. Remove the Probe cover. You will see the R2 adjustment.  

3. Carefully remove the Probe tip from the front of the Probe 

with pliers. 

4. Remove the ground lead screw from the Probe body. 

5. Lift the rear of the printed circuit board up ¼-inch and pull 

it away from the Probe tip. 

6. To reassemble the Probe, do the steps in this procedure 

backwards (start with step five and end with step one.) 
Make sure that the gold pin on the front of the printed 
circuit board aligns correctly in the Probe tip and that the 
ground-lead nut is aligned with the hole in the Probe body. 

How to Clean the Probe 

WX

Warning 

For safe operation and maintenance of the product, 
remove the input signals before you clean the 
Product. 

Use a soft cloth dampened in a weak solution of detergent 
and water to clean the 85RF II. Do not use solvents. 

Summary of Contents for 85RF II

Page 1: ... Product Look for cracks or missing plastic Carefully look at the insulation around the terminals Limit operation to the specified measurement category voltage or amperage ratings Do not touch voltages 30 V ac rms 42 V ac peak or 60 V dc Do not use the Product around explosive gas vapor or in damp or wet environments Do not use and disable the Product if it is damaged Use the Product only as speci...

Page 2: ...ue of an input and is calibrated to read rms value of a sine wave Voltage range 0 25 V rms to 30V rms Maximum input voltage 30 V rms 200 V dc Input capacitance Approximately 9 pF Temperature range Operating 10 C to 35 C Storage 40 C to 75 C Humidity 90 R H Output connector Fits standard 0 75 inch dual banana connectors Accessory BNC to Probe Adapter P N 574756 Pollution degree 2 Operating altitude...

Page 3: ...the Probe 2 Touch the Probe tip to the circuit under test Frequencies greater than 100 MHz To measure frequencies greater than 100 MHz 1 Ground the 4 inch clip lead supplied with the Probe 2 Touch the Probe tip to the circuit under test Note Measurements above 100 MHz must be made with minimum cable lengths and a terminated 50 e system One inch or less of non terminated coaxial cable such as a BNC...

Page 4: ...bration The performance and calibration test is a verification test to make sure that the 85 RF II is functional and correctly calibrated Use the procedure as an acceptance test and or calibration procedure the Probe has one adjustment which is R2 The recommended calibration interval is one year Note If the Probe cannot be calibrated to the specifications in this document the Probe could be damage...

Page 5: ...e limits disassemble the Probe refer to the Probe Disassembly Section in this Instruction Sheet and adjust R2 for a DMM measurement between 0 990 V dc and 1 010 V dc Reassemble the Probe 3 Move the unit in test to the Normal output of the calibrator and decrease the output level to 0 250 V rms and 1 MHz The DMM will read between 0 223 V dc and 0 280 V dc 4 Set the AC Calibrator to STDBY decrease t...

Page 6: ...of the printed circuit board up inch and pull it away from the Probe tip 6 To reassemble the Probe do the steps in this procedure backwards start with step five and end with step one Make sure that the gold pin on the front of the printed circuit board aligns correctly in the Probe tip and that the ground lead nut is aligned with the hole in the Probe body How to Clean the Probe WXWarning For safe...

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