And the 34970A measures and converts
11 different input signals:
• temperature with thermocouples, RTDs,
and thermistors
• dc and ac volts
• 2- and 4-wire resistance
• frequency and period
• dc and ac current
What’s more, each channel is independently config-
urable. 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 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 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’s internal timer for
automatic scanning at a specific interval, by manu-
ally pressing a front-panel button, or by sending a
software command or external TTL trigger pulse.
Monitor any input
A special display mode monitors a selected input
channel, continuously updating the display with
new readings—even during a scan. It’s great for
keeping an eye on a key input, or for troubleshoot-
ing your system before a test.
Nonvolatile memory 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 to
collect data at a remote location for later upload-
ing to a PC. And because the nonvolatile memory
also holds your system configuration, if you lose
power in the middle of a test, the 34970A resumes
scanning when power is returned.
7
Data Logging Feature Checklist
• From 1 to 120 channels of analog input
• Measurements include dc volts, ac volts,
thermocouple, thermistor and RTD
temperature measurements, 2- and 4-wire
Ohms, dc current, ac current, frequency,
and period
•6
1
/2 digits (22 bits) of resolution with
0.004% basic 1-year dcV accuracy
• 50k reading nonvolatile memory
including timestamp
• Scaling and alarms available on
each channel
• Full-featured front panel for stand-alone
configuration, troubleshooting, and
data viewing
• BenchLink Data Logger II software
for configuration and data analysis
• Nonvolatile storage for five complete
instrument states
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