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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

Page 1 of 1

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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