Skip to content

RZ Tech Notes

Changing Power Supply Fuses

TN0952

Product: RZ, RZ2, RZ5, RZ5D, RZ6, RZ10, ZB1PS
Version: All
Date Added: 2015-01-22

Issue

RZ Processors and ZB1PS device chassis power supplies have fuses that can be changed by the user. This note provides step by step instructions on changing the fuses. This information can also be found in the Power and Safety guide for these devices, available on the TDT Website User Manuals page.

RZ Fuses

The RZ devices uses two 5 x 20 mm, 1.6 A 250 V rated, slow-blow fuses. Access to the fuses are through a fuse plate on the back panel.

Danger

Only fuses with the required rated current, voltage, and specified type should be used with this device.

To change the power supply fuses:

  1. Turn off the power switch and disconnect the power cord from the power supply.

  2. Using a small flathead screwdriver gently push the clip along the left side of the fuse plate to the right.

  3. When the fuse plate pops free, gently slide the fuse plate and housing out of the power supply.

  4. The housing contains two fuses. Replace the defective/broken fuse(s) with a new 5 x 20 mm, 1.6A 250V rated, slow-blow fuse by gently pushing the end of the fuse into the fuse housing.

  5. Push the fuse housing back into the power supply and press gently until the clip clicks into place.

ZB1PS Fuses

The ZB1PS devices uses two 500 mA 250 V rated time lag fuses. Access to the fuses are through fuse plates on the back panel.

Danger

Only fuses with the required rated current, voltage, and specified type should be used with this device.

To change the power supply fuses:

  1. Turn off the power switch and disconnect the power cord from the power supply.

  2. Using a flathead screwdriver, gently push the fuse plate inward.

  3. Once the fuse plate is pressed inward gently turn the screwdriver counterclockwise until the fuse plate tab is visible.

  4. Depress the fuse plate and it will pop up.

  5. Slide the fuse housing out of the power supply.

  6. Replace the defective/broken fuse with a new 500 mA 250 V rating time lag fuse by gently pushing the end of the fuse into the fuse housing.

  7. Push the fuse housing back into the power supply by pressing the screwdriver inward.

  8. Rotate the fuse plate clockwise until the fuse tab is correctly locked back into its original position.

  9. Repeat for the other fuse, if necessary.

Note

This tech note does not cover the older ZB1 model device caddie, which relies on the PS25F power supply. The PS25F uses a different fuse (printed on the faceplate).

RZDSP-P Card data handling issue

TN0940

Product: RZ
Version: Built before 2014-07-01
Date Added: 2014-08-21

Issue

When recording with a PZ amplifier to a RZDSP-P card, users may occasionally see a large amplitude spike, lasting a single sample. This is most likely to occur in long recordings when cycle usage is high and there are data storage macros assigned to the RZDSP-P card.

Solution

A change has been made to the RZDSP-P to resolve this problem and assure that incoming asynchronous data is handled correctly. If you experience this issue, contact Support for assistance.

IZ2 Output Drops Unexpectedly

TN0890

Product: IZ2, IZ2H, RZ
Version: TDT Drivers < 72
Date Added: 2011-07-15

Issue

In voltage mode, the output of the IZ2 can go to zero for approximately 300-350 milliseconds and then return to the originally intended output. In current mode, a similar drop will appear to occur on the monitor ADC, but the output does not actually drop.

Solution

This error is caused by the IZ2 DSP Card installed in the controlling RZ device. If you experience this problem, contact TDT Support to request an RMA for return and repair of your RZDSP-I card.

RZ cannot be reprogrammed

TN0888

Product: RZ
Version: Build date in 2010
Date Added: 2011-03-28

Issue

Some RZs have DSPs that can't be reprogrammed. While trying to reprogram them zBusMon, the DSPs become unresponsive and show 0% cycle usage while good DSPs show 99% usage.

Solution

Contact TDT support for a replacement DSP.

RMS2 component produces erroneous output

TN0881

Product: RX, RZ
Version: < 71
Date Added: 2010-10-15

Issue

The output of the RMS2 component doesn't behave correctly for large inputs and tends to grow unbounded.

Solution

Upgrade to the latest version of TDT Drivers and OpenEx. This was resolved in TDT drivers v71. Upgrade to v71 or above and reprogram the microcode on your RX or RZ.

RZ DAC doesn't output a signal

TN0873

Product: RZ
Version: <= 71
Date Added: 2010-07-20

Issue

Under some circumstances the DAC out component will not function correctly when used in circuits containing zHopIn components.

Workaround

Add a ScaleAdd Component in parallel with the DAC component.

Solution

Install the latest drivers and upgrade the microcode on your RZ.

MCDacOut component only outputs a single channel

TN0854

Product: RZ, RPvdsEx
Version: All
Date Added: 2009-05-29

Issue

The MCDacOut component only outputs a single channel, the channel defined in the ChanOS parameter.

Workaround

Instead of using the MCDacOut component, an iterate component can be used to create multiple DacOut components conveniently.

In this example, the iterate component will generate 4 separate DacOut components, one for each channel of the multi-channel signal.

Unable to use Device Configuration Register for RZ

TN0268

Product: RZ, RPvdsEx
Version: All
Date Added: 2007-10-01

Issue

When an RZ Processor is selected in the Set Hardware Parameters dialog box of RPvdsEx, the Device Configuration Registers section of the dialog box expands but is not editable. Clicking the Clear button produces an error message.

Solution

Use the RZn_Control macro to configure digital I/O for your specific RZ processor.

RZ fails to run circuit in OpenWorkbench

TN0216

Product: RZ, OpenEx
Version: All
Date Added: 2006-09-18

Issue

Because the RZ does not support sample clock synchronization, a project will fail to run if the Synchronize Sampling Clocks Preference is selected in OpenWorkbench.

Solution

In the OpenWorkbench Preferences dialog box, ensure the Synchronize sampling clocks check box is not checked when using the RZ2, RZ5 or RZ6.

External anti-aliasing devices -- are they necessary?

TN0141

Product: RZ, RX
Version: All
Date Added: 2004-09-23

Issue

Anti-aliasing is built in to all processors with sigma-delta DACs or ADCs, including the RX6, RA16SD, RP2.1, RL2, RM1, RM2, and RA16BA. You do not need an external anti-aliasing filter with these devices.

Devices which use PCM DACs or ADCs, such as the RA16PA, RX5, and RV8D do not have a built-in anti-aliasing filter, so it might be necessary to use an external anti-aliasing filter with these devices.

Random and intermittent failure of programmable devices

TN0065

Product: RP2, RX, RZ
Version: All
Date Added: 2002-11-27

Issue

The real-time processors can intermittently fail to boot if there is an external device connected to the Digital I/O port on the device.

Workaround

Remove any cable connected to the digital I/O on your processor before booting it up. Replace the cable once the device is fully booted.

Increased signal noise on DAC outputs when viewed with an oscilloscope

TN0064

Product: RP2, RX, RZ
Version: All
Date Added: 2002-12-17

Issue

An oscilloscope samples at a much higher rate than the processors run at. Users may see increased signal noise beyond the Nyquist frequency. If the sampling rate is set properly, the noise is above the hearing range of your subject and has insufficient power to have any physiological effect.

Workaround

Sample at a higher rate or filter the signal after it is sent from the device.

Important

If signal is acquired on another device, make sure that other device is running at a sampling rate at least as fast as your TDT processor to avoid aliasing artifacts.