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© Copyright Pico Technology 2008

DO139-1

2. General safety summary

Please review the following safety precautions to avoid injury and prevent damage

to this probe or any products that are connected to it.

Observe maximum working voltage

To avoid any injury, do not use the probe above 2500 V rms CAT I between each

input lead and earth or above 5000 V rms CAT I between the two input leads.

Must be grounded

This probe is grounded with the shell of the BNC connector and an auxiliary

grounding terminal.

WARNING

Before making connections to the input leads of this

probe, ensure that its output lead is grounded.

You

may do this either by connecting the BNC shell to a

grounded

measurement

instrument,

or

by

connecting the auxiliary grounding terminal to a

reliable ground point.

Read the next paragraph for

further advice.

You must verify that the probe is securely grounded before connecting the probe

input leads.

Some types of measuring instrument, such as a USB oscilloscope

connected to a laptop, are unlikely to be grounded even if the laptop is powered

from the mains.

Bench-top oscilloscopes are usually grounded, but in some cases

may have been isolated from ground.

A USB oscilloscope connected to a desktop

computer is usually grounded.

In any case, do not assume that the measurement

instrument is grounded.

Always verify the ground connection for yourself

before connecting the probe input leads.

Use fused test prods if necessary

If this probe is intended to use for measurements in circuits of INSTALLATION

CATEGORY III, it should incorporate with fused test prods.

Do not operate without covers

To avoid electric shock or fire hazard, do not operate this probe with the covers

removed.

Do not operate in wet or damp conditions

To avoid electric shock, do not operate this probe in wet or damp conditions.

Do not operate in explosive atmosphere

To avoid injury or fire hazard, do not operate this probe in an explosive atmosphere.

Avoid exposed circuitry

To avoid injury, remove jewelry such as rings, watches and other metallic objects.

Do not touch exposed connections and components when power is present.

DO139-1

© Copyright Pico Technology 2008

7

8. Derating curve

The derating curve for absolute maximum input voltage is as follows:

9. Overrange indicator

The overrange indicator lights up red if the voltage of the input signal exceeds the

linear operating range of the probe.

When this happens, the signal on the probe

output may not accurately represent the signal on the probe input.

10. Test procedure

a.

Connect the BNC output connector to the vertical input of a general-purpose

oscilloscope.

b.

Install four AA cells or connect an appropriate mains adaptor to this probe.

c.

Set the oscilloscope input coupling to DC and 1 V/div.

Center the trace on the

display.

d.

Connect the sprung hooks of the probe to power lines.

e.

Set the range of the probe to 1/100.

f.

A 50 Hz / 60 Hz sine-wave of proper amplitude will be displayed on the screen

of the oscilloscope.

This means the probe is working properly.

11. Cleaning

Use a soft cloth to clean the probe, taking care not to cause damage.

a.

Do not immerse the probe.

b.

Do not use abrasive cleaners.

c.

Do not use chemicals contains benzene or similar solvents.

20

200

2500

2500

10

100

1000

10000

1.0E+05

1.0E+06

1.0E+07

1.0E+08

Frequenc y (Hz)