Portable AC power supplies are available

Additional safety information
(Additional safety information and regulations for 34460A and 34461A devices)

This document is a supplement to document 5185-8500. If the two documents contain conflicting information, the information in this document rather than that in document 5185-8500 applies to the Agilent 34460A and 4461A instruments.

Check receipt of all items

Check that you received the following parts. If anything is missing, contact your nearest Agilent office or Agilent authorized reseller.

  • Power cord (for the country of destination)
  • Certificate for calibration (optional)
  • Agilent 34460A / 61A Product Reference CD-ROM (Product software and manuals) (optional for 34460A)
  • Automation-Ready CD-ROM (Agilent IO Libraries Suite) (optional for 34460A)
  • Additional documentation package
  • USB 2.0 cable (optional for 34460A)

The latest product documentation is available at www.agilent.com/find/truevolt-doc. Documentation for mobile devices can be found at www.agilent.com/find/truevolt-mobilehelp.

safety instructions

The CAUTION notice indicates a hazard. This note draws your attention to work methods, applications, etc. which, if not carried out correctly, can damage the product or lead to the loss of important data. If a procedure is marked with a CAUTION statement, do not proceed until you understand and meet all of the listed conditions.

The WARNING notice indicates a hazard. This note draws attention to working methods, applications or similar which, if not carried out correctly, can lead to personal injury and possibly death. If a process is marked with the note WARNING, you may only proceed if you have understood and fulfilled all of the listed conditions.

Safety symbols

Safety information

General

Never use this product in a manner not specified by the manufacturer. The effectiveness of the protective devices of this product can be impaired if it is used in a manner other than that described in the operating instructions. Do not install any spare parts or make any unauthorized changes to the device. If necessary, return the device to an Agilent service center for service or repair to ensure the safety of the device.

Ground the product

The device is a Class 1 product and is equipped with a grounding power cord set. To minimize the risk of electric shock, the device housing and cover are grounded. The ground pole of the cable must be firmly connected to an electrical ground connection (safety ground) at the socket. If the protective conductor is interrupted (grounding) or if the device is disconnected from the protective conductor connection, there is a risk of electric shock, which can lead to injuries.

cleaning

To prevent electrical shock, unplug the device from the AC power source and disconnect all test leads before cleaning. Clean the outside of the device with a soft, lint-free cloth slightly dampened with water. Do not use abrasives or solvents. Do not clean the inside of the device. If necessary, contact an Agilent Technologies Service Center to ensure continued safety and performance of the device.

AC power cord

The device is disconnected from the mains by removing the AC power cable. Make sure you have adequate access to the power cord to unplug it from the AC power source. Use only the power cords specified by Agilent for your country of destination or a cord of the appropriate capacity.

Do not remove the cover of the device

The device may only be opened by qualified service technicians. Service: Unplug the device from the mains socket and disconnect all probes from the connections before servicing the device.

AC mains fuses

To avoid the risk of fire, the mains fuse may only be replaced with a fuse of the same type, rated current and cut-off characteristics. Before replacing the fuse, all test connectors must be unplugged and the device must be disconnected from the AC power source.

Self test

Before measuring dangerous voltages or currents, remove all test leads to the device and start the query TEST: ALL? over the remote interface and read the result to make sure the device is running properly.

The query TEST: ALL? is a self-test that outputs +0 if the device passes and +1 if the device fails. You can also run this query from the front panel by pressing [Shift]> [Utility]> Test / Admin> Self Test> Full Test. If this self-test fails, ensure that the device is repaired and run the full self-test again before proceeding.

AC power line selector switch setting and fuse installation

Before connecting the device to the AC power supply, check that the line voltage setting, which is indicated on the rear of the AC mains connection, is the correct voltage for the AC mains to be connected. The selection of the mains voltage is indicated in a field on the back, directly to the left of the AC mains connection module. Other nominal line voltages are shown in brackets.

Make sure a suitable fuse is in place. To replace a blown fuse or to check whether it is a suitable fuse, it must be carefully pulled out of the fuse slot and a correct fuse inserted. Use only a slow-blow, certified fuse (5x20 mm, 0.25 A, 250 V). Agilent part number: 2110-0817.

AC power grid Nominal grid voltage rangeAC power grid Mains voltage selector switch
100 - 115100
120 - 127120
202 - 230220
240240

Use the following procedure to configure the power line fuse:

Step 1Lift the tab (1) and pull the fuse insert (2) out of the rear control panel.
step 2Remove the power line selector switch and turn it so that the correct voltage is displayed in the fuse holder window.
step 3

Make sure a suitable fuse is in place. To replace a blown fuse or to check whether it is a suitable fuse, it must be carefully pulled out of the fuse slot and a correct fuse inserted. Use only a slow-blow, certified fuse (5x20 mm, 0.25 A, 250 V). Agilent part number: 2110-0817.

Step 4Replace the fuse holder and slide it into the rear control panel.

Connect the power cord and input and output cables

Connect the power cord and LAN, GPIB, or USB cable as desired. After switching on (as described below), the device carries out a self-test and then displays information on help and the current IP address in a message. The GPIB address may also be displayed.

The standard measuring function of the device is direct voltage (DCV) with activated automatic range selection.

Power switch

Press the power button on the lower left of the front panel. If the device does not switch on as a result, check that the power cord is plugged in correctly, the power line fuse is installed and the power line selector switch is set correctly (see description above). Also make sure that the device is connected to a live voltage source. If the LED under the On / Off button is off, the device is not connected to the AC power supply. If the LED is yellow, the device is connected to the AC power supply, but is in standby mode. When it is green, the device is switched on.

Under certain circumstances the yellow LED lights up, even if the wrong mains voltage has been selected. In this case, the device may not turn on.

If the self-test fails when the device is switched on, the message is displayed in the top right corner Error displayed. A message describing the error is also displayed. See the device information for information about error codes and instructions on how to return the device for service.

To switch off the device, press and hold the power switch for about 500 ms. This prevents the device from being switched off unintentionally by touching the power switch.

Measurement limits

To avoid damage to the device and electric shocks, do not exceed any of the measurement limits defined below.

Measure the AC power supply

The HI and LO input connections as well as the input connection for power can be connected to the AC power supply in systems of IEC Category II for mains voltages up to 300 VAC. To protect against electric shock, the inputs must not be connected to the AC power supply at mains voltages above 300 VAC. More detailed information can be found under IEC measurement category II.

IEC measurement category II

To protect against electric shock, the Agilent Truevolt Series DMM protects users from an AC power surge. When measuring the AC power supply, the HI and LO input terminals can be connected to AC power supplies up to 300 VAC under measurement conditions according to Measurement Category II conditions defined below.

IEC measurement category II includes all electrical devices that are connected to the AC power source via a socket on a branch line. This includes most small appliances, test equipment, and other devices that plug into a branch or electrical outlet. The device can be used for measurements where the HI and LO inputs are connected to the AC power source in such devices or directly to the branch line (up to 300 VAC). However, the device should not be used with its HI and LO inputs connected to the AC power source in permanently installed electrical equipment such as main switch board, under-board disconnect boxes, or hard-wired motors.Overvoltages can occur in such devices and circuits, which overstrain the device protection.


Protection fuse for current measurement

To avoid the risk of fire, the overcurrent protection may only be replaced with fuses of the specified type and with the same cut-off characteristics. Before replacing the fuse, all test connectors must be unplugged and the device must be disconnected from the AC power source.

Front / rear switch

Do not change the position of the front / rear switch on the front panel when signals are present on the front or rear connectors. The switch is not intended to be an active multiplexer. Switching while power or high voltages are present can damage the device or result in electric shock.

Measure current with a current transformer

If a current transformer is used to measure the current, use a current transformer with an additional internal fuse. Using a current transformer without a protective fuse can cause dangerous voltages and result in severe electric shock or death. It can also damage the device.

Measurement limits

Truevolt Series DMMs have protective circuitry to prevent damage to the device and prevent electrical shock, provided that the measurement limits are not exceeded. To ensure safe operation of the device, do not exceed the measurement limit values ​​specified on the front panel and on the rear of the device according to the following definition:

34460A Front panel
Connection area

34461A Front control panel
Connection area

34461A Rear control panel
Connection area

The front panel and rear panel connections (34461A only) are shown above. The front / rear switch (34461A only) selects the connection kit to be used. The switch must not be operated while signals are present on the front or rear connections.

The user-replaceable 3 A overcurrent fuse is located on the rear. There is a 3 A and 10 A overcurrent fuse in the device (34461A only). Contact your Agilent Sales and Service Center or see the replacement instructions in the product service documentation.

In order to maintain protection, fuses may only be replaced with fuses of the appropriate type and with the appropriate cut-off characteristics.

Input terminal measurement limits

The measurement limits are defined for the input connections:

(HI and LO) Main input terminals. The HI and LO input terminals are used for voltage, resistance, frequency (period) and diode test measurements. Two measurement limit values ​​are defined for these connections:

  • HI to LO measurement limit. The measurement limit from HI to LO (input terminals) is 1000 VDC or 750 VAC, which is also the maximum voltage measurement. This limit can also be expressed as a maximum of 1000 Vpk.
  • Measurement limit LO to ground. The LO input terminal can safely flow relative to the ground with a maximum of 500 Vpk, whereby the ground is defined as the protective conductor in the AC power cable connected to the device.

As indicated by the limit values ​​given above, the measurement limit for the HI input terminal is a maximum of 1500 Vpk relative to ground, if LO corresponds to the maximum value of 500 Vpk relative to ground.

Input connector (power). The input connection for current ("I") has a measurement limit of 3 A or 10 A (DC or AC) between the connection “I” (3 A or 10 A) and the LO input connection. Note that the power input connections always have approximately the same voltage as the LO connection, unless an overcurrent fuse is open. The 10 A connection is only available on the 34461A.

Limits of the sensor line connection measurements

The HI and LO terminals are used for DCV ratio measurements and 4-wire resistance and temperature measurements. The measuring limit is 200 Vpk for all connection pairs: LO connection at the LO input, HI connection at the LO input and HI connection at the LO connection.

The limit value 200 Vpk on the sensor leads is the measurement limit value. Operating voltages for resistance measurements are much lower - up to ± 12 V in normal operation.

Spare parts for the device are listed below. Both parts apply to the 34460A and 34461A.

Part numberdescription
2110-0817Line fuse (250 mA, 250 V, time delay)
2110-1547Overcurrent protection (3.15 A, 500 V, time delay)