1908 and 1908P 5½ digit bench/portable multimeters

Internal rechargeable batteries

for ‘use anywhere’ versatility

Unlike most high performance bench multimeters, the 1908 and

1908P can operate without AC power whenever required.

The batteries are charged from the internal power supply and

can give up to 35 hours of operation.

This enables the meter to be used in locations where no AC line

power is available, or moved around multiple room locations

without the nuisance of having to find a power socket.

When precision measurements are needed, handheld portable

multimeters may not be up to the task. The 1908/1908P

not only offers fully portable precision, but also built-in data

logging for remote locations.

Key Features

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Dual display and dual measurement capability

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Internal rechargeable batteries for true portability

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High accuracy and resolution: 0.02%, 1nA, 1mW, 100nA

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Frequency, capacitance and temperature measurements

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Wide range of maths and data logging functions

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2 or 4 terminal ohms measurement

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Wide true RMS AC; AC + DC measurements

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Software for remote control and logging included

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USB, RS232, GPIB* and LAN (LXI) interfaces**

** RS232, GPIB and LAN interfaces on 1908P only.* GPIB optional.

Two models - 1908 and 1908P

The 1908 multimeter incorporates a USB interface for remote control and

readback.

The 1908P incorporates USB, RS232 and LXI compliant LAN interfaces

making it suitable for a wider range of system applications. GPIB can be

added as an option.

Both models can operate from either AC-line power or internal batteries, but

the 1908P requires AC-line power when using the remote interfaces.*

*USB does not require AC line power on either model

Dual display and dual measurement system

The 1908 has both a main display and a secondary display. The two displays

can be used for a variety of purposes:

z

To display a measurement together with the selected range (e.g. 100 Vdc).

z

To display a measurement in two different units (e.g. ac volts and dBm).

z

To display the result of a calculated function (e.g. value and % deviation).

z

To measure and display two parameters of one signal (e.g. ac and dc volts).

z

To measure and display two different signals (e.g. ac volts and dc current).

Capabilities in detail

affordable, portable precision

Dual measurement/display combinations

Primary Display

Secondary Display Choices

DCV

ACV

DCI*

ACI*

ACV

DCV

ACI*

DCI*

Hz

ACV +DCV

ACV

DCV

Hz

DCI

ACI

DCV*

ACV*

ACI

DCI

ACV*

DCV*

Hz

ACI + DCI

ACI

DCI

Hz

dB

ACV

DCV

Hz

ACI*

DCI*

* requires multi-lead connection

Automatic or Manual ranging

Quick response auto-ranging is provided for all measurement

parameters ensuring the best possible resolution at all times.

Alternatively manual ranging can be selected. The secondary display

can show the range value, giving greater clarity.

Wideband True RMS AC

True RMS AC gives accurate measurements regardless of the

waveform shape.

The wide bandwidth attenuator provides high accuracy within the

audio band and gives extended response to avoid errors when

measuring switching waveforms.

Measurements are normally AC coupled but, when required, the true

RMS value of the AC plus DC components can be shown.

Frequency & Capacitance

High accuracy frequency measurement (better than 0.01%) is

available from 10Hz to 120kHz. A reciprocal counting technique is

used to give up to 0.01Hz resolution and fast update.

Capacitance measurement is also built-in with five ranges up to 120μF.

Temperature Measurement

Linearised measurement is incorporated for PT100 and PT1000

platinum resistance temperature detectors (RTDs). It can use either a

2 wire or 4 wire connection and can be displayed in °C or °F.

Smart functions for added power

Linear scaling with offset

This function enables a reading to be multiplied by a scale factor (A)

and for an offset (b) to be added or subtracted.

This means, for example, that the electrical output of a transducer

can be scaled to give a direct readout of the physical parameter e.g.

temperature or weight.

It is particularly useful with 4-20mA current loops.

dB measurements

AC voltages can be displayed in dB as well as voltage. Built-in zero

reference scaling enables voltages to be displayed in dBm relative to

a choice of impedance from 50W up to 8kW.

The voltage can be displayed simultaneously in the secondary display.

Limits comparison

This function enables the reading to be tested against high and

low limits set by the user. The display then shows HI, LO or PASS in

addition to the measurement result.

NOTE: the display illustrations on this page are actual size when printed at A4.