Calibrating A 4-20 Unit; Zero Calibration; Span Calibration - Dräger REGARD-1 Installation, Operation And Maintenance Manual

The SW1-F switch sets the TWA function for all firmware versions:
SW1-F TWA
ON
OFF OFF
Insert a card in the window above the display to show the measured gas and range.
Pre-printed and blank labels are at the end of this manual.

Calibrating a 4-20 unit

NOTE
For further information, please refer to the calibration instructions
in the transmitter's operating manual.

Zero calibration

There is no zero adjustment for the 4-20 unit. The controller indicates zero for a
transmitter signal of 4 mA ± 0.3 mA. If necessary, calibrate the transmitter to give
4.0 mA at zero gas.

Span calibration

Span calibration can be performed either by applying calibration gas to the transmitter /
sensor or by changing the output signal of the transmitter, to simulate a gas signal.
Observe the transmitter manual.
Issue 5 - June 2005
ON
Configuration and calibration
Page 33 of 64 Pages