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MODEL DO-03/04 SECTION 8.0
CALIBRATION - CURRENT OUTPUTS
SECTION 8.0
CALIBRATION - CURRENT OUTPUTS
8.1 INTRODUCTION
Although the analyzer outputs are calibrated at the factory, they can be trimmed in the field to match the reading
from a standard current meter. Both the low output (0 or 4 mA) and the high output (20 mA) can be trimmed.
8.2 TRIMMING THE OUTPUTS
Adjust temperature
Calibrate pH
Output trim
Exit Enter
1. From the main display, press any key to obtain the main menu. With
the cursor on "Calibrate" press Enter (F4).
NOTE
If Hold was enabled in Section 5.6, the hold screen will appear.
To activate hold, refer to Section 5.6, step 11.
2. Move the cursor to "Output trim” and press Enter (F4).
3. The warning screen reminds the user that the output currents will be
affected. Pres Cont (F3) to continue.
4. Use the or keys to move the cursor to the desired output and
press Enter (F4).
5. Select “Cal point 1” (0 or 4 mA) or “Cal point 2” (20 mA).
6. Move the cursor to “Meter” and press Enter (F4). Measure the output
current with a calibrated ammeter. Use the or keys to change
the display to match the ammeter reading and press Save (F4).
7. Move the cursor to the other “Cal point” and select it. Repeat step 6.
NOTE
If Hold was activated during calibration, “Hold Mode Activated”
will continue to flash in the main display. Return the sensor to
normal and deactivate Hold. Refer to Section 5.6, step 11.
CAUTION:
Current outputs
may be affected
Abort Cont
Trim output 1
Trim output 2
Exit Enter
Cal point : 1
Meter: 4.00 mA
Expected: 4.00 mA
Simulating output1
Exit Edit
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