Attention! Refer to manual.

TA189
AC / DC
CURRENT PROBE

Application around and removal fromUNINSULATED HAZARDOUS LIVE conductors ispermitted.
Double/reinforced insulation.
Complies with the relevant European standards.
Do not dispose of this product as unsorted
municipal waste. Contact a qualified recycler fordisposal.

9 V Alkaline battery
PP3, MN 1604
or IEC6LR61> 100 kΩ and ≤ 100 pF

General data
Conductor size ..................
Output cable and connectors ....
...........................................
Operating temperature ......
Storage temperature withbattery removed ...............

25 mm diameter2 m long coax terminatedwith safety BNC connector
0 °C to +50 °C-20 °C to +85 °C1)

Accuracy quoted is for conductor in centre of aperture
1To avoid electric shock:• Use caution during installation and use of this product.
High voltages and currents may be present in circuit undertest.

00.5
0-5

-0.5
-1-10-1.5-2-15-2.5

Typical frequency plot
-20-3

• This product must be used only by qualified personnel
practising applicable safety precautions.

Phase shift in degrees

The following symbols appear on the product:

Power supply .........................
...........................................
...........................................
Load impedance (minimum) ....

Gain in dB (wrt 100 Hz)

SAFETY

101001000

10000

Gain

Frequency (Hz)• Do not use product if damaged.

100000Phase• Always connect probe to display device before it is installedaround the conductor.
• Always ensure that the probe is removed from any live
electrical circuit, and that leads are disconnected before
removing the battery cover.
• Do not hold the probe anywhere beyond the tactile barrier
see Fig. 1.

2

1345

4
6

SPECIFICATION7Electrical data89

1. Jaws
2. Conventional current direction
3. Tactile barrier
4. Battery cover
5. Battery cover screw
6. Jaw trigger
7. On/off switch
8. Auto zero button
9. LED(All accuracies stated at 23°C ± 1°C)

User’s Guide

Nominal current ..............
Measuring range (s) ..........
Overload capacity .............
Output sensitivity .............
Accuracy .........................
Resolution .......................
Gain variation ..................
Frequency range1) ...........

30 A AC peak or DC
30 A
500 A (60 s)
100 mV/A± 1% of reading ± 2 mA
± 1 mA±0.01% of reading/°C
DC to 100 kHz (0.5 dB)

Fig. 1.

OPERATING INSTRUCTIONS
Switch On
When the probe is switched on to the required measuring
range, the green LED will illuminate. The LED starts flashingwhen the battery voltage is too low for normal operation andwarns the user that it requires changing. This procedure isdescribed below.

Unclamp the probe from the conductor, turn it off using theon - off switch and disconnect the output leads from external
equipment.
Loosen the captive screw which secures the battery cover. Liftthe cover through 30° and pull it clear of the probe body as
shown in Fig. 1. Replace the battery, re-fit the battery coverand fasten the screw.
Fit only 9 V battery type PP3 Alkaline (MN 1604).

Auto Zero

SAFETY STANDARDSThe output zero offset voltage of the probe may change due tothermal shifts and other environmental conditions. Select therequired measuring range and, to null the output voltage,
depress the Auto Zero button. Ensure that the probe is awayfrom the current carrying conductor while the probe is beingnulled.

EN 61010-1

Current Measurement
1.
2.
3.
4.
5.

Switch on the probe using the on/off switch and checkthat the green LED is lit.
Connect the output lead to the oscilloscope.
Zero the probe using the Auto Zero button.
Clamp the jaws of the probe round the conductor ensuring
a good contact between the closing faces of the jaws.
Observe and take measurements as required. Positive
output indicates that the current flow is in the direction
shown by the arrow on the probe.

Auto Power OFF
In order to save battery life, the probe will automatically switch
itself off after approximately 10 minutes. To disable the Autopower off function, switch off the probe and switch on whilepressing the Auto Zero button. The red LED will illuminate andthe probe will stay ON until switched off again.
Battery Replacement
The green or red LED will flash when the minimum operating
voltage is approached (refer to Fig. 1). Use the following
procedure:

SAFETY WARNING
Before removing the battery cover, ensure that theprobe is disconnected from the oscilloscope andremote from any live electrical circuit.

EN 61010-2-032
300 V Cat III, Pollution Degree 2EMC Standards
EN 61326-2-2
ROHS and WEEE compliant
This product is designed to be safe under the following
conditions:

WARRANTYYour current probe is guaranteed for one year from the date ofpurchase against defective material or workmanship. If theprobe fails during the warranty period, we shall, at ourdiscretion, repair or replace it with a new or reconditioned unit
provided we are satisfied that the failure is due to defective
material or workmanship. To make a claim under warranty,
return the probe to us, postage prepaid, with a description of
the defect.
Goods alleged by the buyer to be defective shall not form thesubject of any claim for injury, loss, damage, or any expense
howsoever incurred, whether arising directly or indirectly fromsuch alleged defects other than death or personal injury
resulting from the seller‘s negligence.
No condition is made or to be implied, nor is any warranty
given or to be implied as to the life or wear of goods suppliedor that they will be suitable for any particular purpose or for
use under specific conditions, notwithstanding that such
purpose or conditions may be made known to the seller.

- indoor use- altitude up to 2000 m

TA189 User’s Guide iss. 3- temperature 0 °C to +50 °C- maximum relative humidity 80% for temperatures up to31 °C decreasing linearly to 40% relative humidity at50 °C.
Use of the probe on uninsulated conductors is limited to300 V AC RMS or DC. and frequencies below 1 kHz.
Safety in its use is the responsibility of the operator who must
be a suitably qualified or authorised person. Ensure that yourfingers are behind the tactile barrier (see Fig. 1) when usingthe probe. Always inspect the probe and lead for damagebefore use.
To avoid electric shock, keep the probe clean and free ofsurface contamination.
Use a cloth moistened with isopropyl alcohol to clean the probe.
Ensure that the probe is completely dry before using.

Pico Technology Limited
James House
Colmworth Business ParkSt Neots
Cambridgeshire
PE19 8YP
United Kingdom
Tel:
Fax:
Technical Support:+44 (0) 1480 396395+44 (0) 1480 396296
support@picotech.com