
TEST INST (S)
CALIBRATION CHECKLIST
PROC. NO.
Orion Research 201 Digital pH Meter
MFG. MODEL
SER. NO.
PROCEDURE
STEP
NO.
(1)
FUNCTION TESTED
(2)
NOMINAL
(3)
MEASURED VALUES
FIRST RUN
(4)
SECOND RUN
(5)
OUT
OF
TOL
(6)
CALIBRATION TOLERANCES
(7)
NA 17–20SC–42
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3.1 Test Control Settings
TI Control(s):
3.1.4 TEMP C 29 C
3.1.5 Adjust CALIB for TI display
of 7.00 ck( ) NA
4.2 PH Indication Tests
4.2.3 (DC millivolt source)
(mV) (pH) (pH)
299.8 2.00 1.95 to 2.05
179.9 4.00 3.95 to 4.05
59.96 6.00 5.95 to 6.05
–59.96 8.00 7.95 to 8.05
–179.9 10.00 9.95 to 10.05
–299.8 12.00 11.95 to 12.05
4.3 PH Calibration Tests
4.3.4 TI Control(s):
Adjust TEMP C to digital
thermometer indication ck( ) NA
STD 1 of approx 7.00 ck( ) NA
4.3.6 TI Control(s):
Adjust TEMP C to digital
thermometer indication ck( ) NA
STD 2 of approx. 4.01 ck( ) NA
4.3.8 pH measurement
(pH) (pH)
4.01 3.95 to 4.05
4.3.9 STD 3 of approx. 10.01 ck( ) NA
4.3.10 pH measurement
(pH) (pH)
10.01 9.95 to 10.05
NAVAIR 17–20SC–42
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