Test Products International 460 - Manual (Page 26)

the red LED will come on and remain on until it is exhausted or the battery is replaced.
Low Current Adapter - A254
This small clamp-on adapter measures currents one amp and below accompanied by voltages up
to 1000V in either AC or DC.
Plug the unit into the upper sockets of the 460. Use DCV on Channel A (Ch A) and convert 10mV
to 1.0 amp with the 254 set to 10mV/A and 100mV to 1.0amp with the 254 set to 100mV/A, or
Channel B (Ch B) and use either the 10mV/A DCA or 100mV/A selections (depending on the
appropriate A254 setting) to read both millivolts and equivalent amps at the top of the screen.
Be sure to plug the A254 into the correct sockets of the 460 for the channel being used.
CAUTION: This adapter is designed to measure currents up to 1 Amp.
Attempts to measure currents greater than 60 Amps could damage both
the adapter and the 460 measuring instrument.
The A254 uses a 9V battery (supplied), and includes a detachable instrument head socket (2-pin
to co-axial), and a zero adjust control.
Current Shunt Adapter - A130
This adapter is an inexpensive way of extending the current range of your tpi 460 Handheld
Oscilloscope to 30 amps.
The A130 comes with two probes and is used in series with the circuit to be measured. The unit
uses the power being measured and requires no batteries.
Plug the unit into the upper sockets of the 460. Use DCV on Channel A (Ch A) and convert
0.1mV to 0.1 amp, or Channel B (Ch B) and use the 1mV selection to read both millivolts and
equivalent amps at the top of the screen.
Be sure to plug the A130 into the correct sockets of the 460 for the channel being used.
NOTE: Channel A is recommended for the A130 adapter, as the Ch A plug
orientation on the 460 allows the Adapter On/Off switch to face the user.
Pressure Adapter - A620
This adapter can measure air densities from a vacuum of 30 inHg to a pressure of 500 psi.
Connect the adapter to the upper sockets of the 460. Use DCV on Channel A (Ch A) and convert
0.1mV to 1 psi for pressure and 1 inHg for vacuum, or Channel B (Ch B) using the 1mV/PSI or
460 User s Guide Using Adapters
C5-2