Keithley Instruments: Integra 27xx Series Digital Multimeter with Switching Capabilities

Each channel can be independently configured for making measurements. The parameters that can be chosen for each channel include speed, range, resolution, number of power line cycles (NPLC), filtering type, offset compensation, math functions to be displayed, CJC type, RTD type, frequency gate time, “m” and “b” values in mX + b format, HI/LO limits, low Ω (Model 27502750 only), ratio calculation, and thermistor type.

Monitor any specific input channel on the front panel display during a scan. This feature can also serve as an analog trigger to initiate a scan sequence based on some external factor, such as a temperature rising above a pre-set limit. Only the data of interest is acquired, so there’s no need to spend hours searching through reams of normal readings to find anomalous data.

Switching between the front and rear panel measurement inputs is as easy as pressing a button. Users can select the front panel inputs for tasks such as system setup and verification, manual probing, troubleshooting, and calibration, while the rear panel inputs through the modules allow fast, automated multiplexing and control.

Up to four different setup configurations can be stored in onboard memory. If the line power fails during a scan, the system will resume scanning where it stopped once power is restored.

Provides preventive maintenance of the system and switches.

The mainframe’s non-volatile wrap-around reading memory allows continuous, unattended datalogging over long periods. Data in the buffer can be transferred to a PC controller automatically as new data is acquired. The real-time clock can be used to time- and date-stamp readings for later review and interpretation.

Use to implement external triggers to initiate a scan sequence.

Trigger external alarms or perform other control functions without a PC controller.

Protects sensitive devices from damage and prevents self-heating errors during testing (Model 27502750 only).

Stores the results of channel-to channel ratio and average math operations.

Mathematical functions available at the push of a button are channel average, mX+b scaling, minimum, maximum, average, and standard deviation.