Instrument Verification - Hach sc100 1720E Instrument Manual

Step Select
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5.4 Instrument Verification

Select ACTIVE, HOLD, or TRANSFER
Drain/clean/rinse the turbidimeter body or cal cylinder.
POUR 20 NTU STD INTO CYL/BODY. REPLACE HEAD
Measured reading and reading based on 1.0 gain displayed
Select VERIFICATION type (begin at step
on page 45) or enter initials to complete calibration.}
RETURN SENSOR TO MEASURE MODE
Main Menu or Main Measurement Screen
Note: If a dry verification is performed directly after a calibration, the measured value is
assigned as the expected value for future verifications (when using the dry verification
device with the same serial number). As long as the verification exists within the verification
history, the expected value will be retained. Otherwise, the expected value will be the
nominal value associated with the dry verification device.
Instrument verification is intended as a simple check to ensure turbidimeter
functionality between calibrations. A verification is initially performed directly after
a calibration and subsequent independent verifications are referenced to the initial
verification. The pass/fail criteria is set and subsequent verifications are deemed
good or bad, when compared to the initial verification. All verifications are based
on the current calibration and must be repeated when the instrument is
recalibrated or when the pass/fail criteria is not met.
Menu Level/Instructions
CALIBRATE
STABLCAL CAL
OUTPUT MODE
GOOD CAL!
GAIN: X.XX
ENTER TO CONT
Verify CAL? (see Note below)
7 in section 5.4.1 on page 44
System Startup
Confirm
(to store)
to verify/
exit no verify
or section 5.4.2
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