Agilent Technologies 34401A User manual

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Agilent Connection Expert (ACE) is an Agilent IO Libraries utility that configures the IO interface between the 34401A
and your PC. The IO Libraries are contained on the Agilent Automation-Ready CD or may be downloaded from the
Agilent Developer Network website at: http://adn.tm.agilent.com.
1. Install the Agilent IO Libraries on your PC and connect a GPIB cable between the PC and the 34401A.
2. From the PC taskbar, click the Agilent IO Control icon
and select ‘Agilent Connection Expert’ from the menu.
3. Select the PC’s GPIB interface and select ‘Add Instrument’
from the Connection Expert menu bar.
4. Select the GPIB0 interface and then select the
34401A GPIB address (factory setting = 22).
5. To verify the IO connection, open ‘Interactive IO’
and send the *IDN? command to the 34401A by
selecting “Send & Read”.
6. Use the ‘Options’ tab to increase the timeout period
for commands with execution times > 5 ms (e.g. *TST?).
Connecting the 34401A to a PC using Agilent Connection Expert
Adjust the Carry Handle.
Grasp the handle by the
sides and pull outward:
Then adjust the handle
to the desired position:
1. Preparing for Use
Agilent 34401A
6½ Digit Multimeter
Connect the Test Leads to the Input Terminals.
Turn
Page for
Step 2
Product Reference CD-ROM. All product documentation, software, and examples
are included on the Agilent 34401A Product Reference CD-ROM.
Safety Summary
Quick Start Tutorial
Connect the Power Cord.
Then plug in the instrument.
Line voltage switch is set at factory for
country of destination – verify setting
before applying power.
NOTE TO PRINTER:
This is “FACE A” (the FRONT)
See folding diagram below:
NOTE TO PRINTER:
This is FACE “E” (short face, folds inside)
(See folding diagram at right)
NOTE TO PRINTER:
This is FACE “F” (the BACK)
(See folding diagram at right)
Do not defeat power cord safety ground feature. Plug
in to a grounded (earthed) outlet. Do not use product in
any manner not specified by the manufacturer.
Do not install substitute parts or perform any
unauthorized modification to the product. Return the
product to Agilent Technologies or a designated repair
center for service to ensure that safety features are
maintained.
WARNING
A WARNING notice denotes a hazard. It calls attention
to an operating procedure, practice, or the like that, if
not correctly performed or adhered to, could result in
personal injury or death. Do not proceed beyond a
WARNING notice until the indicated conditions are fully
understood and met.
CAUTION
A CAUTION notice denotes a hazard. It calls attention
to an operating procedure, practice, or the like that, if
not correctly performed or adhered to, could result in
damage to the product or loss of important data. Do
not proceed beyond a CAUTION notice until the
indicated conditions are fully understood and met.
Symbols
Earth Ground
Chassis Ground
Risk of electric shock
Refer to manual for additional safety
information.
CAT II (300 v) IEC Measurement Category II. Inputs can be
connected to mains (up to 300 VAC) under
Category II overvoltage conditions.
WARNING
Main Power and Test Input Disconnect: Unplug
product from wall outlet, remove power cord, and
remove all probes from all terminals before servicing.
Only qualified, service-trained personnel should
remove the cover from the instrument.
Line and Current Protection Fuses: For continued
protection against fire, replace the line fuse and the
current-protection fuse only with fuses of the specified
type and rating.
Front/Rear Switch: Do not change the position of the
Front/Rear switch on the front panel while signals are
present on either the front or rear set of terminals.
Switching while high voltages or currents are present
may cause instrument damage and lead to the risk of
electric shock.
IEC Measurement Category II. The HI and LO input
terminals may be connected to mains under IEC
Measurement Category II overvoltage conditions for
measurement of line voltages up to 300 VAC. To avoid
the danger of electric shock, do not connect the inputs
to mains for line voltages above 300 VAC. Connect to
mains only at an outlet, or in a device connected to
such an outlet, on a branch circuit protected by a circuit
breaker. See "Safety Notices" in the User's Guide for
further information.
Protection Limits: To avoid instrument damage and
the risk of electric shock, do not exceed any of the
protection limits indicated on the terminal panel and
defined in the User's Guide.
ADDITIONAL SAFETY INFORMATION
For further information, refer to the "Safety Notices"
section in the Agilent 34401A User's Guide.
Copyright © 2007 Agilent Technologies, Inc.
Printed In Malaysia August 2007 E0807
34401-90005 Edition 1
AC or DC
Voltage*
+
-AC or
DC
Current
+
-
4-wire
Resistance or
Temperature
See "Safety Summary" on the back of this tutorial.
* Also used for capacitance,
continuity, diode test, freq-
uency, 2-wire resistance,
and 2-wire temperature
measurements.
I

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- turns the 34401A on and off. A self-
test occurs during the power-on
sequence.
- selects the front or rear panel
terminals as the input to the
34401A.
- transfers instrument control from the
computer (remote) to the front panel
(local).
Example: display indicating remote operation and rear panel
terminals selected.
2. Power, Input Terminal Selection,
and Local Control
The measurement function is set using the
following keys:
- when preceded by the “Shift” key the
functions shown above the keys are
selected.
Example: Period function selected
3. Setting the Function
Resolution is the number of digits the 34401A
can measure or display. Resolution is also
unique to the function selected and is set using
the following keys:
- selects 4 digit resolution
- selects 5 digit resolution
- selects 6 digit resolution
For increased measurement speed, select 4
digits. For increased accuracy, select 6 digits.
6. Triggering
Measurements are triggered from the front panel
using the following keys:
- disables auto-triggering (default) and
issues a single trigger to the 34401A
each time the key is pressed.
-Auto: enables auto-triggering if
the 34401A is in single trigger
mode (above).
-Hold: displays the measurement
after three consecutive readings
within the sensitivity band
(Trigger menu: READ HOLD).
Front Panel Menu Reference
A: MEAS MENU
1: AC FILTER > 2: CONTINUITY > 3: INPUT R > 4: RATIO FUNC > 5: RESOLUTION
B: MATH MENU
1: MIN-MAX > 2: NULL VALUE > 3: dB REL > 4: dBm REF R > 5: LIMIT TEST > 6: HIGH LIMIT > 7: LOW LIMIT > 8: SCALE >
9: SCALE GAIN > 10: SCALE OFST
C: TRIG MENU
1: READ HOLD > 2: TRIG DELAY > 3: N SAMPLES
D: SYS MENU
1: RDGS STORE > 2: SAVED RDGS > 3: ERROR > 4: TEST > 5: DISPLAY > 6: BEEP > 7: COMMA > 8: REVISION >
9: STORE STATE > 10: RCL STATE > 11: POWER ON
E: I/O MENU
1: GPIB ADDR > 2: INTERFACE > 3: BAUD RATE > 4: PARITY > 5: LANGUAGE
F: CAL MENU
1: SECURED > [1: UNSECURED > 2: CALIBRATE] > 3: CAL COUNT > 4: MESSAGE
G: TEMP MENU
1: TEMP FUNC > 2: UNITS > 3: RTD TYPE 4: RTD Ro > 5: T/C TYPE > 6: THERM TYPE > 7: JUNCT TEMP
NOTE TO PRINTER:
This is FACE “B”
(See folding diagram on page 1)
NOTE TO PRINTER:
This is FACE “C”
(See folding diagram on page 1)
NOTE TO PRINTER:
This is FACE “D” (short face, folds inside)
(See folding diagram on page 1)
- dB measurement relative to value
in ‘dB Relative’ register (register
value is first db measurement
after dB function is enabled).
- dBm measurement relative to a
resistance referenced to 1 mW
(Math menu: dBm REF R).
reading = 10Log10(measurement2/ reference resistance/ 1mW)
Example: dBm measurement @ ~ 3 VDC - 600Ωreference
resistance
Selected math operations are available from the
34401A front panel using the keys:
- value subtracted from the measurement
(Math menu: NULL VALUE)
reading = measurement – null value
- displays minimum and maximum values
for the triggered set of readings.
Example: maximum value indicated with Math operation
‘Min/Max’ enabled
Menu Navigation
The front panel menu provides access to a
subset of the 34401A functionality. The menu is
navigated using the following keys:
Sequence:
- enables the front panel menu
- scrolls through menus ‘A’ - ‘G’
- selects menu command list and
scrolls through commands
- selects parameter list and scrolls
through parameters
- selects (saves) parameter and exits
the menu (Enter is not a shifted function).
- enables menu (if off) and recalls
the last command displayed
when the menu was exited.
Note: for numeric parameters (0-9):
- selects and increments/
decrements each digit
individually
Example: number of reading samples increased to 5
0000 SMPLS
04.09495 VDC
Adrs Rmt Rear
05.02287 MAX
MaTh
200.001 uSEC 11.7842 DBm
MaTh
Measurement Configuration
Function DCV
AC Filter 20 Hz
Range Autorange
Resolution 5 digits, slow mode
Integration Time 10 PLCs
Autozero On
Input Resistance 10 MΩ
Continuity Threshold 10Ω
Math Operations
State Off
Function Null
dBm Reference Resistance 600Ω
Registers Cleared
Triggering
Trigger Source Auto-trigger
Trigger Delay Automatic
Samples Per Trigger 1
Reading Hold Sensitivity 0.10% of range
Other
Reading Memory Cleared
34401A Power-on and Reset States
4. Setting the Range and Resolution
5. Math Operations
The measurement range is unique to the
selected function. The range is set using the
following keys:
- selects between auto-range and manual
range
- manually decreases the range
- manually increases the range
Example: display indicating 10 volt range, 4 digit resolution
03.987 VDC
MAN