User Manual

• Setup

General

Inputs to the unit are analogue current or voltage type. They are rated

for measuring category III signals with a voltage of 300 V

eff

to earth.

The input and output type are jumper selectable and their ranges are

set by the values used during calibration.

• Calibration

General

All instruments are calibrated before leaving the factory and should not

need adjustment unless a change of range is required or until the next

scheduled calibration.

Equipment requirements

• A suitable DC Power Supply

• A suitable DC mA or Voltage source

• A

n accurate digital multimeter (accurate to 0.05 mV and ±1 μA)

Procedure

. Remove the instrument from the case and confirm that the jumpers

are in the correct positions for the input and output type required.

2. Connect up the instrument.

. Press the UP and DOWN buttons together. The Status LED will turn

Red to indicate that the unit is in calibration mode.

. Set the input source to the minimum value required, e.g., 4 mA for

4-20 mA inputs.

Adjust the output value using the up and down keys until the

multimeter shows the output value required at minimum input, e.g., 4

mA for a 4-20 mA output.

. When you are satisfied with the output, press the ENT button. The

middle LED will switch on to indicate that you are calibrating the

maximum input and corresponding output values.