Time Electronics

1048 Voltage / Current / Loop Calibrator

Time Electronics Ltd, Unit 5, TON Business Park, 2-8 Morley Road, Tonbridge, Kent, TN9 1RA, United Kingdom

T: +44 (0) 1732 355993 | F: +44 (0) 1732 350198 | mail@timeelectronics.co.uk | www.timeelectronics.com

Description

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 Time Electronics 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.

In the source mode, voltage up to 22 V and current up to 22 mA may be

generated in three ranges. When 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 no key press

menus to learn, just switches and buttons. A multi-turn potentiometer controls

the output, with 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.

The 1048 is housed in a pocket sized ABS case, with carry case supplied

as standard. Connections are by standard 4 mm plugs or by clamping the

wires under the terminals. A single 9 V battery powers the unit or an external

12 V DC power supply may be used which disconnects the internal battery.

Features

• Source/measure voltage and current

• 3 source ranges: 0 to 22 mA and 0 to 22 V

• 3 measure ranges: 0 to 70 mA and 0 to 50 V

• Accuracy 0.02 %

• Transmitter simulator/sink loop control

• Output steps and ramps

• Fine adjustment (inching)

• 20 hours typical battery life

• Optional mains power supply (230 V and 110 V available)

Applications

Common use of the 1048 is to simulate a transducer or measure the

current flow in a transducer loop. The 1048 can be used to check a

4 to 20 mA system in either source or measure modes of operation, with

the 24 V compliance voltage powering the loop when current source

mode is selected.

In the source mode, the 1048 may be used to calibrate meters,

thermocouple

indicators,

data

loggers,

for

signal

injection,

semiconductor characterisation, or as a backing off source. In the

measure mode, the 1048 may be used in the same way as a digital

multimeter, checking DC voltages and current over 3 ranges with

excellent resolution and accuracy.