2-1
IM 2553A-01EN
Features
3
2
1
4
5
6
7
8
9
10
11
12
13
14
App
Index
2.1 DC Voltage, DC Current, and Resistance
Sourcing
The 2553A is a DC calibrator that sources DC voltage, DC current, and resistance. It also sources
thermoelectromotive force and resistance that simulate those of a temperature sensor. This section
describes the DC voltage, DC current, and resistance sourcing features. For a description of the
thermoelectromotive-force and resistance sourcing features, see section 2.2.
Source and Sink
The 2553A can not only source current but also sink current.
1, 2
Sinking is possible regardless of
whether the source voltage is positive or negative.
−
+
−
+
Current
Voltage
Source
Source
Sink
Sink
1 By absorbing the current from a voltage source such as a distributor, the 2553A can simulate a load, like a
two-wire transmitter.
2 Excludes the 10 mV range. When using the 10 mV range, do not apply external voltage or current.
DC Voltage Sourcing
The source range and output current for each voltage range are shown below. The 2553A outputs
the specified DC voltage, within the range limited by the maximum output current, to the load circuit
connected to the output terminals.
−32 V −12 V
12 V
32 V
Approx. –120 mA
Approx. –30 mA
Approx. 120 mA
Approx. 30 mA
Range
10 mV
100 mV
1 V
10 V
30 V
Source Range
±12.0000 mV
±120.000 mV
±1.20000 V
±12.0000 V
±32.000 V
Maximum Output Current
—
1
10 mA or higher
2
Approx. 120 mA
Approx. 120 mA
Approx. 30 mA
Current
Voltage
1 Since a voltage divider is used in the 10 mV range, the output resistance is
approximately 1 Ω. It is not suitable for connecting to a low-impedance load
that requires current to flow through. The output voltage will drop if such a
load is connected. Connect a high-impedance load, a load that is sufficiently
larger than the output resistance. When using the 10 mV range, do not apply
external voltage or current. Doing so may damage the voltage divider.
2 In the 100 mV range, the output voltage may drop significantly when the
output current exceeds 10 mA. Connect a load that will not cause the output
current to exceed 10 mA.
Source
Sink
(excluding the
10 mV range)
Source
The maximum sink current is the same as the maximum output current of each range except for the 10 mV range.
: Immediately after sinking current in this region, errors exceeding the accuracy specifications may occur
due to the increased temperature inside the 2553A.
Sink
(excluding
the 10 mV
range)
Chapter 2
Features
