Martel Electronics 3001 - Manual (Page 19)

Figure 10 - DC Voltage Output Connection
d) Use the numeric keypad to enter the desired output value and press the key.
Alternatively, use the or cursor key to select a digit to modify, followed by the
or cursor key to ramp the digit up or down. This method offers a simple
solution when small changes to an output value are required, or if specific decades need
to be incremented or decremented.
e) When DC voltage mode is first selected, the 3001 is placed in the standby (Stby)
mode which puts the positive (+) output jack into a high impedance state
(>100k ohm) for safety. To place the output into the active state, press the
key which toggles between the standby and operate modes.
The standby mode is also activated in the following situations:
• If a fault occurs during operation, such as an overload or short circuit condition.
• As a safety feature for all new outputs over 30 VDC. Refer to the product specification
section of this manual for maximum drive currents.
• Warning. Scrolling the output when the output value is already over 30V will not place
the 3001 in standby mode for each new value.
• Warning. Automatic setpoints over 30V will not place the 3001 in standby mode for
each new value.
f) The 3001 can be locked to a specific voltage range by entering a value in that range
and then selecting the secondary RNG LOCK function by pressing the and
keys.
4.2 DC Current Output
The 3001 can source DC current from 0 mA to 100 mA.
a) Disconnect any test leads from external devices.
b) Press the key to select DC voltage and current mode, if not already selected.
If DC voltage mode is displayed, press the key again to cycle to DC current mode.
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