Extech SD750 Pressure Dataloggers

• 3 Channel Pressure Datalogger
• User can select the data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds or Auto
• Complete with six AAA batteries, 2G SD card, Universal AC Adaptor, three connectors, and mounting bracket
• Optional transducers sold separately (choose 30psi, 150psi or 300psi range)

Extech SD750 3-Channel Pressure Datalogger

Extech's SD750 3-channel pressure datalogger allows technicians to monitor and record pressure levels from three sources simultaneously, allowing more accurate, detailed measurements of pressure to be taken.

The SD750 is designed to be used in combination with installed transducers (not supplied with the instrument), most commonly up to 5000psi with 4-20mA output) or several other transudcer types which are described in the manual/datasheet. When measuring pressure values the SD750 is able to measure and record in several different pressure units including bar, psi, kg/cm², mmHg, inHg, mH20, inH20, atm and kPa (full range below in tech specs section).

When measuring, the Extech SD750 displays readings from each input simultaneously on a large-size LCD screen. It's also possible to set a sampling rate of 5, 10, 30, 60, 120, 300 or 600 seconds (as well as auto readings) and the SD750 will store readings taken onto the 2GB SD card that's included with this meter (allowing storage of around 2M records total).

This meter can be powered either by six AAA batteries or is suitable for mains power using the included AC adaptor.

The Extech SD750 3-Channel Pressure Datalogger displays and stores pressure management data over time. Using an SD card, readings are easily stored and are able to be seen on a computer in Excel format. The Extech SD750 measures and displays three different channels at once, using one meter instead of three. The Extech SD-750 is useful for applications like pressure measurements from hydraulic, pneumatic, air compressor, and gas systems, and more. This tool has three optional transducers with different ranges that are compatible with it, but are sold separately.

Mounting and Wiring

• The SD750 can be placed on a tabletop using the supplied tilt stand, it can be wall mounted using the rear mounting access holes, or it can be laid flat on a desktop or other surface.
• Up to three 4‐20mADC pressure transducers (two‐wire) can be connected to the bottom of the SD750 as shown in the diagram below.
• Wiring for 2‐wire transmitters must be configured exactly as shown in the diagram. Only the two terminals on the right for each channel group are to be used. The two terminals on the left for each channel group are unused.
• Signal positive (S+) and Power positive (V+) are connected to the same terminal as shown in the diagram below. Signal negative (S–) and Power negative (V‐) are connected to the same terminal as shown below.

Measurements

When the meter is properly powered, mounted, configured, and wired to the transducers as described earlier, the meter can begin to be used to accurately display pressure readings. The meter’s LCD shows the Channel 1 input reading on the top, the Channel 2 reading in the center, and the Channel 3 reading on the bottom as shown below. If the x100 indicator is flashing on the display, multiply the displayed reading by a factor of 100 to obtain the correct reading. The unit of measure shown to the right of the Channel 2 reading applies to all channels. Select the unit of measure as described in the SET MODE section.