2-2
IM 2553A-01EN
DC Current Sourcing
The source range and output voltage for each current range are shown below. The 2553A outputs
the specified DC current, within the range limited by the maximum output voltage, to the load circuit
connected to the output terminals.
Approx. 15 V
Approx. –15 V
−120 mA
−32 mA
120 mA
32 mA
Range
1 mA
10 mA
30 mA
100 mA
Source Range
±1.20000 mA
±12.0000 mA
±32.000 mA
±120.000 mA
Maximum Output Voltage
Approx. 15 V
Approx. 15 V
Approx. 30 V
Approx. 15 V
Current
Voltage
Source
Source
Sink
Sink
Source
Sink
Sink
Source
Approx. 30 V
Approx. –30 V
−32 mA 32 mA
Current
Voltage
1 mA, 10 mA, or 100 mA range
30 mA range
The sink current range is the same as the source range of each range.
: Immediately after sinking current in this region, errors
exceeding the accuracy specifications may occur due to
the increased temperature inside the 2553A.
Resistance Sourcing
The 2553A sources simulation resistance R (= V/I) by outputting from its output terminals voltage V,
which is defined as R×I, where R is the specified resistance and I the excitation current for measuring
resistance. The excitation current is supplied to the 2553A output terminals from the device to be
calibrated.* For example, if the excitation current is 1 mA and the specified resistance is 100 Ω, the
2553A outputs 0.1 V.
The source range and excitation current for the resistance are shown below.
* Resistance measuring instrument, RTD thermometer, etc.
0.5 mA 2 mA
400 Ω
18 Ω
Range
400
Ω
Source Range
18.00 Ω to 400.00 Ω
Excitation current
0.5 mA to 2 mA
Resistance
Excitation current
Source
Turning the Output On and Off
The specified voltage, current, or resistance output and current sink can be turned on and off.
• ON
The specified voltage, current, or resistance is output from the output terminals. If the output is
outside the selectable range, the output cannot be turned on. In current sink mode, sinking is
performed.
• OFF
No output is produced. If you change the range or if the overload protection function is activated,
the output automatically turns off.
2.1 DC Voltage, DC Current, and Resistance Sourcing
