Model 7003M
Operator Manual
To determine if current output linearization is necessary, do the following:
1.Connect a separate current meter to the output terminals (any device that will display an accurate current measurement such as a computer input will suffice).
NOTE
Do not simply connect a current measurement meter in parallel with the usual load because this will lead to incorrect readings.
2.Place the instrument in DIAGNOSTIC mode by pressing the UP and DOWN ARROWS, followed by the DISPLAY and ACK keys. The display will show consecutively:
tSt,
3.Press the DISPLAY key until the minus sign and a number are displayed. This reading is the current output (in milliamps) as determined by the Model 7003M.
4.Use the UP and DOWN ARROW keys to increase the display reading, and occasionally, compare the current displayed on both meters (the instrument display and the separate meter).
5.If the two readings are too disparate (different applications require lesser or greater tolerance), do the following
6.Use the UP and DOWN ARROW keys to set the current output to a value halfway up its range. The operator may prefer to set it at a critical measurement point.
7.Press the CAL key. The instrument will flash CCA, illuminate the three
8.Use the UP and DOWN ARROW keys to adjust the actual current output (as noted on the separate meter) to the correct amount. Note that the instrument display does not change.
9.Press ENTER, the instrument displays diA, returns to the DIAGNOSTIC mode, and continues to display the current output.
10.Use the UP and DOWN ARROW keys to adjust the current output to a lower value, representing the low range (the operator may prefer to use 4 mA to represent 0% oxygen).
11.Press CAL (the instrument displays CCL for lower current output setting), and repeat steps 3 and 4 of this procedure.
12.Use the UP and DOWN ARROW keys to adjust the current output to a value higher than the initial calibration value (step 1 of this procedure), representing the higher range (the operator may prefer to set it at 16.72mA to represent 20.9% oxygen.
13.Press CAL (the instrument displays CCH for high current output setting), and repeat steps 3 and 4 of this procedure.
To return to the RUN mode, press ENTER twice.
At any time during this procedure, the operator may press the ACK key to reset all calibration coefficients to default values. Pressing DISPLAY at any time during this procedure will cause the instrument to display for a moment the relevant calibration efficient.
The operator may escape the current CALIBRATION and DIAGNOSTIC mode altogether by pressing ENTER twice. Note, all coefficients will return to the default values, and the current calibration procedure must be started over to linearize current output.
Rosemount Analytical Inc. A Division of Emerson Process Management | Calibration and Adjustments |