34907A AGILENT TECHNOLOGIES, 34907A Datasheet - Page 9
![Data Acquisition Switch Unit](/photos/22/34/223408/4260688_sml.jpg)
34907A
Manufacturer Part Number
34907A
Description
Data Acquisition Switch Unit
Manufacturer
AGILENT TECHNOLOGIES
Datasheet
1.34905A.pdf
(28 pages)
Specifications of 34907A
Input Current Max
400mA
Bandwidth
100kHz
Input Voltage Max
42V
Lead Free Status / RoHS Status
na
And the 34970A/34972A measures and converts
11 different input signals:
• temperature with thermocouples, RTDs,
• dc and ac volts
• 2- and 4-wire resistance
• frequency and period
• dc and ac current
What’s more, each channel is independently configurable.
This means you can configure channel 1—for dcV, channel
2 for a K-type thermocouple, and channels 3 and 13 for a
4-wire RTD measurement—all on the same module, all in a
single scan. For custom linear conversions, use the Mx+B
scaling function on any channel. You can even display a
custom 3-character engineering label like RPM or PSI to
identify your measurement units.
Versatile alarms
Alarms are available on a per-channel basis as well.
Enter a high limit, a low limit, or both. The 34970A/34972A
compares each reading to its limits and flags any out-of-
range measurements. You can assign one of four TTL
alarm outputs to any input channel to trigger external
alarm lights, sirens, or send a TTL pulse to your control
system, all without a PC connected.
Scanning made simple
The 34970A/34972A automatically builds a scan list that
includes all configured inputs (even digital inputs from the
Agilent 34907A multifunction module) in ascending order
by channel number. You can pace scans by setting the
34970A/34972A’s internal timer for automatic scanning
at a specific interval, by manually pressing a front-panel
button, or by sending a software command or external
TTL trigger pulse.
and thermistors
Monitor any input
A special display mode monitors a selected input channel,
continuously updating the display with new readings—even
during a scan. Or, when using the 34972A with built-in LAN,
the channels can be monitored over the network using the
graphical Web interface. It’s great for keeping an eye on a
key input, or for troubleshooting your system before a test.
Non-volatile memory and USB fl ash drive adds
convenience, portability
All readings are automatically time-stamped and stored in
a nonvolatile 50,000 reading memory—enough memory
to hold more than a week’s worth of data (20 channels
scanned every five minutes). The nonvolatile memory holds
your data even after power is removed, so you can use the
34970A/34972A to collect data at a remote location for
later uploading to a PC. Or if you need even more memory,
the 34972A’s USB port can be used to log data directly
to a USB flash drive or to copy the data from the reading
memory without being connected to a computer.
Data logging feature checklist
• From 1 to 120 channels of analog input
• Measurements include dc volts, ac volts, thermo-
• 6½ digits (22 bits) of resolution with 0.004% basic
• 50 k reading nonvolatile memory including time-
• Scaling and alarms available on each channel
• Full-featured front panel for stand-alone configura-
• BenchLink Data Logger 3 software for configura-
• Nonvolatile storage for five complete instrument
• Built-in LAN or USB interfaces to support remote
couple, thermistor and RTD temperature measure-
ments, 2- and 4-wire Ohms, dc current, ac current,
frequency, and period
1-year dcV accuracy
stamp
tion, troubleshooting, and data viewing
tion and data analysis
states
data logging applications (34972A only)
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