Hach 2100Qis, User Manual

Page: 18 / 30

Verification options
The Verification Options contain: Set Verification Standard, Set
Acceptance Criteria and Verification Reminder.
1. Push the Left key (Verify Cal) and then the UP and DOWN keys.
Option Description
Set Verification
Standard To change the verification standard use the UP and
DOWN keys to enter a new standard value.
Range 0.50–20.0 NTU (Default setting: 10.00 NTU)
Range 0–20 NTU for RapidCal
™
(0–40 NTU)
0–800 NTU for calibration curves with a range from
0–1000 NTU
Set Acceptance
Criteria Enter the Acceptance Criteria for comparison against the
initial calibration verification reading to determine passing
or failing. Range 1–50% (Default setting: 10%)
Verification
Reminder Verification Reminder—The meter will make an audible
sound when verification is due. Select one of the following
options for time interval and push
OK :Off, 30 min (Default
setting), 2 h, 4 h, 8 h, 24 h
Allow Defer—Push
Allow Defer and select Yes or No to
postpone the verification due time
Calibration verification (Verify Cal)
The manufacturer recommends a calibration verification once a week.
After a calibration is complete, the meter automatically goes into the
Verify Cal mode.
Make sure that the sample cell is clean. Oil the sample cell with silicone
oil, refer to
Apply silicone oil to a sample cell on page 17. Check the
standard solution. Prepare a formazin standard at the same value and
read the value.
1. Push Verify Cal to
enter the Verify menu.
2. Gently invert the
standard. Insert the
10.0 NTU (or other
defined value)
Verification Standard
and close the lid.
3. Push Read . The
display shows
Stabilizing and then
shows the result and
tolerance range.
4. Push Done to return
to the reading display.
Repeat the calibration
verification if the
verification failed.
16 English