Frederiksen 3867.70 User Manual

Demonstration multimeter

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User´s guide for Demonstration multimeter

20.12.10

Description:

This demonstration multimeter has been developed

especially for teaching, and it can display the fol-

lowing quantities: Voltage, Current, Resistance,

Frequency, Temperature, Pressure and Acidity (pH).

The demonstration multimeter is supplied with a lar-

ge 4-digit display with 45 mm high illuminated digits

on the front panel. On the rear a smaller display with

14 mm high digits is provided for the teacher.

The connections for measuring Voltage, Current, Re-

sistance and Frequency are made with standard 4

mm safety jacks on the front panel. The temperatu-

re measurement is made using a type K thermo -

couple probe via the special connector designed for

A/S Søren Frederiksen, Ølgod

Viaduktvej 35 · DK-6870 Ølgod

Tel. +45 7524 4966

info@frederiksen.eu

Fax +45 7524 6282

www.frederiksen.eu

this purpose. The Acidity (pH) measurement is per-

formed using a standard pH-electrode with a BNC

connector. Pressure measurements are made using

pressure sensor accessories. For thermocouple pro-

bes, pH-electrodes and pressure sensors, please

see the section on accessories.

The quantity to be measured is selected using the

rotary switch in the center of the front panel below

the display.

The instrument is supplied with an RS232 computer

interface for transferring data to a PC. This data

transfer can be performed using general communi-

cation software like hyperterminal – or the free pro-

gram Datalyse (datalyse.dk).

Ae 3867.70

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Page 1 K thermo - gram Datalyse (datalyse.dk). couple probe via the special connector designed for ® A/S Søren Frederiksen, Ølgod Tel. +45 7524 4966 info@frederiksen.eu Viaduktvej 35 · DK-6870 Ølgod Fax +45 7524 6282...
Page 2 Operation: The instrument is separated into 4 galvanically iso- lated components: 4 digit display for readout. Temperature Dot matrix display for displaying units. pH and pressure Select button for confirmation of quantity cho- Voltage, current, resistance and frequency sen. Serial port Adjustment buttons for calibration of pH ele- This means that the demonstration multimeter can ctrode using buffer solutions, selection of mea-...
Page 3 Required accrssories: - Frequency: For measurements of voltage, current, resistance Frequency measurements up to 10 kHz require an and frequency standard laboratory leads can be input signal of at least 1 volt. For measurements used. from 10 kHz to 100 kHz a signal of at least 10 volts is required.
Page 4 - Pressure - Menu: The Multimeter can only be used with the specified This option is intended for use with special facilities, pressure sensor accessories (see Table above). e.g. for connection to a PC. In the current version of the Multimeter this option has not been implemen- - Calibration of pressure sensor: ted.