Seaward DO5000 Series - Manual (Page 6)

Operating Instructions Microhmmeter Type DO5000
1
1. Introduction
1.1 Overview
The DO5000 Microhmmeter is a high accuracy instrument designed for industrial and
laboratory resistance measurements.
Features include:
• Programmable measuring current user selectable in 100 steps.
• Automatic temperature Compensation.
• Hi/Lo Limits with red/green front panel warning Pass/Fail lamps.
• Switched current mode with automatic averaging ensures elimination of thermal emf
errors.
• Large graphic LCD display for resistance measurement values as well as configuration
settings and statistical results.
• Advanced functions include data logging and statistical reporting with max/min,
average values peak to peak values and standard deviation.
• Analogue output, IEEE-488 and RS232 communication, and PLC interfaces available
for automated monitoring and controlling applications.
• Fast mode 50 measurements/second for production testing.
The DO5000 is a true four wire measuring instrument eliminating the need to compensate for
lead resistance. The measured value is displayed in large characters with decimal point and
units k
Ω, Ω, or mΩ. For maximum accuracy the measuring current may be automatically
reversed and the average of measurement displayed. For measurements on unstable samples,
a rolling average filter is available.
Resistance measurement accuracy is typically 0.03% (1 year specification) and the value may
be displayed with or without temperature compensation, the final accuracy depends upon the
current selected.
The front panel measurement connections are made via 4mm sockets located on the front
panel. The connection to a Pt100 temperature sensor is made with a standard DIN connector.