TM 10-6630-246-12&P
TM 09241 B-12&P
2-9.OPERATION OF TOTAL DISSOLVED SOLIDS TEST SET. - continued
(8)
Fill the cell cup with standard solution 442-300 (11) to 1/4 inch (6 mm) above upper electrode (7).
(9)
Position range switch (8) to 100.
(10) Press button (9). Pointer (3) should be at 3f0.1 on scale, if not, adjust trimmer (12) until pointer reaches 3.
(11) Discard solution and flush the cell cup (5) with demineralized or distilled water. Discard wash water. Dry cell
cup thoroughly.
(12) Install bottom cover (1).
(13) Position range switch (8) to S.
(14) Press button (9) and compare reading with internal standard value on label attached to bottom cover (1). If
reading is not within f 0.1, change label to match reading.
e.
Calibrate the range extender.
(1)
Fill the cell cup (5) with standard solution 442-30,000 (13) to 1/4 inch (6 mm) above upper electrode (7).
(2)
Position range switch (8) to 1000.
(3)
Rinse the range extender (14) in standard solution 442-30,000 (13). Discard solution.
(4)
Insert range extender (14) into filled cell cup (5), seating the O-ring seal (15).
NOTE
Range extender is adjusted to correct meter reading. Do not adjust internal calibration controls.
(5)
Press button (9). Pointer (3) should be at 3+0.1 on scale, if not, adjust range extender (14) as follows.
(a) Remove range extender (14) from cell cup (5).
(b) If reading was too high, push or tap white insert (16) into range extender (14) body.
(c) If reading was too low, twist and pull white insert (16) out of range extender (14) body.
(d) Insert range extender (14) into cell cup, seating the O-ring seal (15).
(e) Press button (9). Pointer (3) should be at 3+0.1 on scale, if not, repeat (a) through (e) as necessary.
(6)
Discard solution and flush the cell cup (5) and range extender (14) with demineralized or distilled water.
Discard wash water. Thoroughly dry cell cup.
f.
Replace any supplies used during testing.
g.
Carefully pack all equipment and supplies into case. Close and latch the case.
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