Digitimer DS5 - Hardware Connections; Input, Monitor, USB, and Load Connections

To Next Page

To Previous Page

DS5 Isolated Bipolar Constant Current Stimulator DS5 Operator's Manual 5.0

Exceeding an Enabled Limit

When an enabled output limit is exceeded the stimulator output will disable, a warning beep will sound and

an arrow with an exclamation mark will appear on the main operating screen next to the exceeded

parameter. The stimulator output will need to be re-enabled before a new stimulation protocol can begin

(see Resetting & Re-enabling After Output Limit Error).

Exceeding a Disabled Limit

When a disabled output limit is exceeded, an arrow will appear on the display next to that parameter, but

the stimulator will continue to produce an output until the higher (disabled) value or one of the other output

limits is exceeded. At this point, the output will be disabled, an exclamation mark and an arrow will appear

next to the parameter that caused the stimulator output to disable. As before, the stimulator output will

need to be re-enabled before a new stimulation protocol can begin (see Resetting & Re-enabling After

Output Limit Error).

Stimulus Parameter Enabled

Disabled

Average output current (AvH) 10mA

55mA

Average Low level (baseline) current (AvL) 50µA Not Limited*

Pulse duration (PD) 1s

Pulse energy limited to 50mJ (PE) 50mJ 300mJ

* If the average low level (baseline) current limit is deactivated, patient protection is maintained as any

current over 400µA is considered a pulse and would then be limited in duration, energy and average current.

Table 3.2 DS5 Output Limits

Hardware Connections

Voltage Input Connection

The DS5 will accept a voltage input of ±1V, ±2.5V, ±5V or ±10V. For correct operation, it is important that

the DS5 is configured for the appropriate input voltage before it is used (see above).

1. The operator should first of all check what output voltage range is provided by the signal generator

or computer interface to be connected to the DS5. This information should be available in the

manual supplied with that equipment.

2. The DS5 input voltage range should then be configured for the same value via the operator

interface. Once set, a full scale input voltage will generate a full scale output current output.

3. The voltage source should then be connected to the Voltage Input BNC socket on the rear of the

DS5, using an appropriate cable.

4. Before a voltage signal is applied to the DS5, it is necessary to press the F2/AZ key to autozero the