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1048 Voltage/Current/Loop Calibrator

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A portable instrument that operates as a current and voltage source and a multi-purpose loop calibrator. High performance and simple operation make it suitable for R&D, service, process control engineers, and calibration technicians. As a versatile handheld calibrator, the source and measure capabilities with 0.02 % accuracy mean the 1048 is a compact solution for most simulation and test applications.

The 1048 combines the advantages of digital accuracy with analog control. Based on the popular functionality of the 1044 calibrator, the 1048 offers higher voltage and current across the three ranges, and improved accuracy. The additional features of transmitter simulation, sink loop control, output stepping and ramping, and incremental fine adjustment make the instrument ideal for use in the process industry.

The large, easy to read 4.5 digit LCD display shows the actual output, even when the connected load exceeds the specifications. This important feature eliminates the risk of large errors when connecting to unknown loads. The display also indicates if the battery becomes critically low.

Features

Source/measure voltage and current
3 source ranges: 0 to 22 mA & 0 to 22 V
3 measure ranges: 0 to 70 mA & 0 to 50 V
Accuracy 0.02 %
Transmitter simulator/sink loop control
Output steps and ramps
Fine adjustment
20 hours typical battery life
Optional mains power supply

1048 Portable Voltage and Current Calibrator

Functions and Features

In source mode, voltage up to 22 V and current up to 22 mA may be generated in three ranges. In current source mode the 1048 has a high 24 V compliance voltage which is ideal for powering process loops. In the measurement mode, the range and function can be easily selected, with the measured input accurately shown on the display.

The step, ramp, and inching functions are simple operation, with a control knob and up/down incrementing buttons for fine control. The output can be reversed (+/-) and zeroed at the flick of a switch. The automatic ramp function enables the user to choose either 5, 11, or 21 point calibration. Manual operation can be quickly restored by a single push of a button.

Portable Operation

The 1048 loop calibrator is housed in a pocket sized, ABS case and comes with a leather carry case containing a compartment for storing test leads.

A single 9 V battery powers the unit or an external 12 V DC power supply may be used which disconnects the internal battery.

Safety Terminals

The 1048 connections are via safety terminals that are compatible with standard plugs, 4 mm shrouded plugs, bare wires, and spade terminals.

These terminals are specifically designed with safety features including limited opening distance and a raised flange around the metal connection surface. This ensures that the clearances are sufficient to make the exposed metal parts touch-proof.

1048 Applications

Common use of the 1048 is to simulate a transducer or measure the current flow in a transducer loop. As a process calibrator it can be used to check a 4 to 20 mA system in either source or measure modes of operation. The 24 V compliance voltage powering the loop when current source mode is selected.

In source mode the 1048 can test and calibrate meters, thermocouple indicators, data loggers. It can also be used for signal injection, semiconductor characterisation, or as a backing off source. In measure mode it can operate as a multimeter, accurately checking DC voltages and currents over 3 ranges.

Specifications

Technical Specification

Voltage Source
Range	Resolution	Accuracy	Output Current	Temp Coefficient
0 to 220 mV	10 μV, 100 μV above 0.2 V	0.05 % of full scale	20 mA	± 6 ppm/°C
0 to 2.2 V	100 μV, 1 mV above 2 V	0.02 % of full scale	20 mA	± 6 ppm/°C
0 to 22 V	1 mV, 10 mV above 20 V	0.02 % of full scale	20 mA	± 6 ppm/°C

Voltage Measure
Range	Resolution	Accuracy	Measure Load	Temp Coefficient
0 to 220 mV	10 μV, 100 μV above 0.2 V	0.05 % of fs ± 1 digit	1 MΩ	± 3 ppm/°C
0 to 2.2 V	100 μV, 1 mV above 2 V	0.02 % of fs ± 1 digit	1 MΩ	± 3 ppm/°C
0 to 22 V	1 mV, 10 mV above 20 V	0.02 % of fs ± 1 digit	10 MΩ	± 3 ppm/°C

Current Source
Range	Resolution	Accuracy	Output Voltage	Temp Coefficient
0 to 220 μA	10 nA, 0.1 μA above 200 mA	0.05 % of full scale	24 V Max	± 12 ppm/°C
0 to 2.2 mA	0.1 μA, 1 μA above 2 mA	0.02 % of full scale	24 V Max	± 12 ppm/°C
0 to 22 mA	1 μA, 10 μA above 20 mA	0.02 % of full scale	24 V Max	± 12 ppm/°C

Current Measure
Range	Resolution	Accuracy	Input Load	Temp Coefficient
0 to 220 μA	10 nA, 0.1 μA above 200 mA	0.05 % of fs ± 1 digit	1 kΩ	± 8 ppm/°C
0 to 2.2 mA	0.1 μA, 1 μA above 2 mA	0.02 % of fs ± 1 digit	110 Ω	± 8 ppm/°C
0 to 22 mA	1 μA, 10 μA above 20 mA	0.02 % of fs ± 1 digit	16 Ω	± 8 ppm/°C

SINK (TX SIM)	2 wire transmitter simulation: External excitation voltage, 3 V min, 50 V max. The current sink levels are adjustable, with accuracies as in the 3 source ranges shown above. Note: Accuracies in all measure modes are +/-1 digit.
Output Steps	5 fixed 4 mA steps for current output 4, 8, 12, 16 & 20 mA 11 fixed 1 V steps for voltage output 0,1,2...10 V 21 fixed steps 1 V/1 mA for V & I output 0,1,2...20 Stepping can be done manually or automatically (Autostep). Stepping speed is adjustable (1-9 sec/step). Dwell time (top and bottom) is one step period. In step mode the accuracy is limited to 0.05 % of span +/- 1 digit
Output Ramp	Current Ramp 4 to 20, or 0 to 20 on all ranges. Voltage Ramp 0 to 10, or 0 to 20 on all ranges. Ramp time 7 seconds. Dwell (top/bottom) 5 seconds. Manual restart. Ramp operation is also available in Sink (TX SIM).
Output Adjustment	A ten turn potentiometer for quick setting, with fine adjust using up/down increment buttons.
Connections	Made by 4 mm connectors or clamped using the wire compression feature.
Power	PP3 size, 9 V battery (supplied). Approximately 20 hours life depending on the current sourced. Alternatively an optional 12 V power supply can be plugged into the 2.5 mm socket on the top of the unit.
Protection	Can withstand open circuits, short circuits and reverse polarity up to 25 V. Additional protection is by an internal fuse.

General Specification

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Downloads

File Name	File Size	Language	Format
1048 Voltage/Current/Loop Calibrator Data Sheet	380 kB	ENES FR IT	PDF
1048 Voltage/Current/Loop Calibrator User Manual	4 MB	EN	PDF

Dimensions:	H 142 x W 78 x D 50 mm
Weight	0.30 kg
Operating temperature	-10 to 50 °C. Storage temperature -30 to 70 °C.
Operating humidity	0 to 90% non-condensing at 25 °C
Supplied With	Leatherette carry case, 9V PP3 battery (installed), and user manual.
Optional Extras	230 V or 110 V mains power supply. Calibration certificates: Traceable (factory) and accredited (ISO 17025).
Country of Origin	UK
Shipping Details	Packed Dimensions: L 31 x W 24 x H 25 cm / Packed Weight: 2 kg
HS Code	9030 3370

7643	230 V Mains Power Supply
7652	110 V Mains Power Supply
C176	Traceable calibration certificate (Factory)
C138	Accredited calibration certificate (ISO 17025)

1048 Voltage/Current/Loop Calibrator

Features

Functions and Features

Portable Operation

Safety Terminals

1048 Applications

Specifications

Downloads

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1048 Voltage/Current/Loop Calibrator

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