Hach EC1000 Instruction Manual page 92

Figure 27 Jumper for D/A Test
Note: A special jumper
must be added for this test
(Figure 27).
5. Close the System Warning relay.
6. Open all relays.
SIO TeST: Pressing
ENTER
To run this test, connect the serial output back to the serial input (Note: The output to input
connection can be made at any point, depending on how much of the system is tested.)
This test sends out an ASCII string, and then checks to see if the same string is received.
RECorder TeST: The sub-menus under this entry are ZERO, FS, and ½ FS.
These entries test the recorder output end points and linearity by outputting recorder zero,
full scale, and ½ full-scale.
ConTRoLler TeST: The sub-menus under this entry are ZERO, FS, and ½ FS.
These entries test the controller output endpoints and linearity by outputting controller
zero, full scale, and ½ full-scale.
1 2 1 2
J2
J3
D/A-A/D loop TEST: This test does a bit weight D/A - A/D loop test.
A good test displays OK followed by 512 +2. A bad test displays FAILED.
CALibration DeFaulTs: The sub-menus under this entry restore the factory defaults for
the pH electrode calibration, the temperature electrode calibration, or the mV offset.
COLD StaRT: This entry restores all variables except input calibration data to
default values.
KEYboard LOCKout code: This entry changes the keyboard lockout code.
Pressing brings up an edit display of KEY=1234, with the first digit flashing.
ENTER
Note: The actual number in the display is the current keyboard lockout code.
After the number is edited to the desired code, press
lockout code.
Note: If the calibration is outside of an acceptable range, an error message is displayed and the
calibration is not accepted.
at this menu entry runs a serial I/O loop test.
3 4 1 2
J1
92
to accept the new keyboard
ENTER