Aalborg PWE Digital User Manual

Page 63

Where:

Y – the calculated ToutScale_mA value.
Z – the calculated ToutOffset_mA value.

Enable DAC update by typing: !11,WRITE,4,N[CR]
Unit will respond with: !11,DisableUpdate: N
Close BackDoor access by typing: !11,MW,1000,0[CR]
Unit will respond with: !11,BackDoorEnabled: N

PWE FLOW CALIBRATION PROCEDURES

Aalborg

Instruments' Flow Calibration Laboratory offers professional calibration

support for PWE Flow Meters using precision calibrators under strictly con-
trolled conditions. NIST traceable calibrations are available. Calibrations can also
be performed at customers' site using available standards.

6.1

Connections and Initial Warm Up

Power up the PWE Flow Meter for at least 1minutes prior to commencing the
calibration procedure. Establish digital RS-485/RS-232 communication between
PC (communication terminal) and the PWE. Start Aalborg

supplied calibration

and maintenance software on the PC.

Note: When done with the analog output calibration make sure the
DAC update is enabled and the BackDoor is closed
(see command below).

NOTE: REMOVAL OF THE FACTORY INSTALLED CALIBRATION
SEALS AND/OR ANY ADJUSTMENTS MADE TO THE METER, AS
DESCRIBED IN THIS SECTION, WILL VOID ANY CALIBRATION
WARRANTY APPLICABLE.

Note: All adjustments in this section are made from the outside of the
meter via digital communication interface between a PC (terminal) and
PWE or via local LCD/KeyPad. There is no need to disassemble any part
of the instrument or perform internal PCB component (potentiometers)
adjustment.