TM 10-6630-246-12&P
TM 09241 B-12&P
2-11. OPERATION OF pH/TEMPERATURE TEST SET. - continued I
Table 2-3. Self Test Sequence and Error Codes
TEST
Number
Section Under Test
Description
Error Code
1
Segment Display
Checks meter display. All segments should
be lit.
2
RAM Check
Checks that external RAM is working
properly
E-2
3
External Input
Checks the electrode input (shorting plug
must be on connector for this test to check).
E-3
4
Internal Check
Checks the meter internal functions.
E-4
5
Internal Reference
Checks the meter internal reference
E-5
6
Ground Reference
Checks the meter ground.
E-6
7
Keypad Test
Checks the function of the keys as they are
pressed.
E-7
8
Auto Shut OFF Test
Checks the automatic shut off feature by
turning the meter off.
E-8
(2) If an error code is displayed, note number and press yes keypad (1) to continue test.
(3) When test number 7 is reached, a 0 (zero) is displayed. Within 10 seconds, press each key in any order. The
display will show a different number for each key pressed.
NOTE
Test number 8 checks the auto shut off feature and will result in the meter turning off.
(4) Press power keypad (2) to turn meter on.
(5) Press measure keypad (3). Display should be steady at 7.00+.02, if not, adjust as follows.
(a)
Press cal keypad, (4) when the display flashes 7.00, press yes keypad (1).
(b)
Press measure keypad (3). Display should be at 100.0, if not, press T (5) or 1 (6) keypad to change.
(c)
Press yes keypad (1). Display should be at 7.00. Press power keypad (2) to turn meter off.
(d)
Remove shorting plug/cap (7) from pH electrode connector (8).
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