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AGILENT 35670A
Supplemental Operator’s Guide
3
Section 3 : Measuring with Transducers
The AGILENT 35670A can be used with a broad range of transducers. Transducers
can use an external preamplifier to convert the raw signal into a voltage that is
compatible with the AGILENT 35670A. Some transducers have internal circuitry
which provides preamplification, however these internal circuits must be powered
externally. The AGILENT 35670A can provide the necessary constant-current
supply for transducers that are of type ICP, Isotron, Piezotron, DelaTron, Low
Impedance, etc.
Using ICP-Type Transducers with the AGILENT 35670A
To set up Channel 1 for an ICP-type transducer:
• Press the [Input] hardkey
• Press [FRONT END CH1 SETUP] softkey (F7).
• Press [ICP SUPLY ON OFF] softkey (F8) until ON is highlighted.
Note that the analyzer automatically switches the front end to AC Coupling in order
to reject the large DC signal that is generated by the constant-current supply.
To set up Channel 2 for an ICP transducer:
• Press the [Input] hardkey
• Press [CHANNEL 1 2 34] softkey (F1) until 2 is highlighted.
• Press [FRONT END CH2 SETUP] softkey (F7).
• Press [ICP SUPLY ON OFF] softkey (F8) until ON is highlighted.
For AGILENT 35670A analyzers with four channels, these same procedures can be
repeated for Channels 3 and 4.
Using Transducers with External Preamplifiers
No special front end setup is required to use transducers with external preamplifiers
except if the preamplifier’s DC component is too high, resulting in a loss of dynamic
range. This can be easily minimized by switching to AC coupling as follows:
• Press the [Input] hardkey
• Press [CHANNEL 1 234] softkey (F1) until 1 is highlighted.
• Press [FRONT END CH1 SETUP] softkey (F7).
• Press [COUPLING AC DC] softkey (F5) until AC is highlighted.
A transducer with an external preamplifier will convert mechanical units (EU) to
volts. Care must be taken to observe gain settings on the external preamplifier,
because these gain settings directly affect the resulting transducer sensitivity.
- Supplemental Operator’s Guide 1
- • Press the [Start] hardkey 10
- • Press the [Scale] hardkey 10
- • Press the [Marker] hardkey 11
- AGILENT 35670A 14
- Trigger Delay 26
- Setting Up Input Range 30
- Specifying Trigger Parameters 30
- Setting Up Time Displays 31
- WAITING FOR CH 1 TRIGGER 31
- Using Force/Response Windows 32
- Averaging 33
- Changing Frequency Span 35
- To start taking measurements 38
- Scaling the Displays 41
- Using Markers to Compare 42
- Setting Up Time Step Arm 44
- Setting Up the Tachometer 46
- Specifying the Start RPM 46
- [Start] hardkey. To pause 47
- Scaling the Display 47
- Accelerometer Polarity 49
- • Press the [D] softkey (F2) 53
- Assessing Measurement Quality 59
- Setting Up External Trigger 65
- Saving Trace to 3.5” Disk 67
- Confirming Contents of NV-RAM 68
- Recall Trace From 3.5” Disk 69
- Plotting the Display 71
- Printing the Display 72
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