TM 10-6630-246-12&P
TM 09241 B-12&P
2-9.OPERATION OF TOTAL DISSOLVED SOLIDS TEST SET. - continued
(b) If the pointer (3) goes off the scale to the right on the 1000 range setting, use the range extender (11) which will
increase the range 10 times.
I Rinse the range extender (11) three times with water to be tested, discarding water between rinses.
2 Push the range extender (11) into the filled cell cup (9), seating the O-ring seal (12).
3 Press the black button (6) and adjust range switch (5) per (a) above.
(c) If the pointer (3) goes off the scale to the right on the 1000 range setting, the meter must be adjusted for range
doubling as follows.
1 Discard water in cell cup (9).
2 Rinse cell cup (9) with demineralized or distilled water and dry thoroughly.
3 Remove bottom cover (7).
4 Adjust range switch (5) to S position.
5. Press button (6) and adjust master calibration control (8) until pointer (3) reaches half the internal standard value
on label attached to bottom cover (7). Attach bottom cover.
6 Repeat test beginning at step c. (2).
(6) To determine Total Dissolved Solids in Parts Per Million, multiply pointer (3) reading by range setting of range
switch (5). If range extender (11) was used, multiply the answer by 10. If meter (2) was adjusted for range doubling,
multiply the answer by 2.
(7) Remove range extender (11), if used, and empty cell cup (9).
(8) Thoroughly rinse cell cup (9), collection bottle (13), and any equipment used with demineralized or distilled water.
Dry thoroughly after rinsing.
(9) If meter (2) was adjusted for range doubling, readjust for standard range as follows.
(a)
Remove bottom cover (7).
(b) Adjust range switch (5) to S position.
(c) Press button (6) and adjust master calibration control (8) until pointer (3) matches the internal standard value
on label attached to bottom cover (7). Attach bottom cover.
(10)If meter is to be stored for an extended period, remove bottom cover (7) by carefully prying it off and remove AC to
DC adapter (1) or ’battery (14) as appropriate. Be sure battery removal clip (15) is in meter (2). Attach bottom cover.
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