CA11E Voltage/Current Calibrator
DISCONTINUED – REPLACED BY CA300 SERIES
Designed for simple operation and high performance. The voltage and current calibrator CA11E can supply and measure signals of up to 30 V DC, 24 mA DC and has a current SINK function
|Ordering info ►►|
- Source and Measuring of Voltage and
Generates and measures voltages up to 30 V DC and currents up to 24 mA DC.
- 24 V (20 mA)/Loop check
Enables measurement of generated current signals while supplying loop power to two-wire transmitter.
- 20 mA SINK Function
Absorbs the voltage supplied from an external power supply to its H terminal and simulates a two-wire transmitter making it ideal for loop checks.
- 4-20 mA and 1-5 V DC Step-up/ down Function
- Sweep Function
Increases and decreases the output level to the preset level at a constant rate for the selected sweep time (16 or 32 seconds )
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- Both signal source and measurement functions
- Simple operation, easy to use
- Rotary switch range selector
- Setup of value to be generated using the up and down keys
- Lightweight, compact body
- Display resolution for current 0.001mA
- Addition of loop check function
- Automatic Power-off
- Runs on 1.5 V AA-size Batteries or AC Adapter
- Choose either "rubber boot" or "carrying case"
- Complete circuit Protection
The Yokogawa CA11E, Handy Calibrator, is a small, lightweight, dedicated calibrator that can simultaneously source and measure voltage and current. The CA11E is ideal for calibration and equipment checking needs at maintenance and production sites, requiring only instrument to make your task much easier. In addition, The CA11E incorporates a rotary switch and up and down keys for simple operation, its easy to carry out field calibration without needing to consult an instruction manual. Just open the carrying case cover and connect the cables, and you’re ready to take measurements.
When source output (positive voltage and current output) is selected, the error amplifier A1 is maintained for the output control circuit and the DC-DC converter output stabilized as a result. The output is controlled so that the feedback voltage from the output selection circuit becomes equal to the D-A converter output. This involves dividing the output voltage by the voltage range and feeding back the voltage drop in the output current shunt to the input side of the A1 amplifier of the output selection circuit. In this case, the service life of the battery should be improved by limiting unnecessary power consumption. This can be achieved by controlling the output voltage of the DC-DC converter so that the voltage drop in the output stabilizing elements takes the minimum value required for control even if the output voltage varies. The current SINK function controls the current sunk from the power supply applied externally using the output control circuit.
The protection circuit detects the current through the output terminal and the voltage across the output terminals, and cuts off the output circuit if the current and/or voltage exceed their specified values. Although a relay is normally used for the on/off element, this calibrator uses MOSFET so that the inputs of both polarities can be cut off at a high speed.
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