Martel Electronics 3001 - Manual (Page 20)

c) Connect the unit under test to the current output terminals of the 3001 as shown in
figure 11.
Figure 11 - DC Current 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 current 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:
• No connection made to the output terminals.
• The voltage compliance for a given output current is exceeded. The 3001 has a
typical voltage compliance of 10V so that 4-20mA application loads of up to 500
ohms can be driven. At maximum current of 100mA, the maximum load is 100
ohms.
4.3 Resistance Temperature Detector (RTD) and Ohms Measure
The 3001 can measure all common RTD types, 5 custom RTD curves, and a custom
SPRT in °F or °C, plus basic resistance from 0 to 4000 ohms.
The following common RTD types are supported:
Pt 385 100
Ω, 200Ω, 500Ω, 1000Ω
Pt 3926 100
Ω
Pt 3916 (JIS) 100
Ω
Ni120 120
Ω
Cu 427 (Minco) 10
Ω
YSI 400
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