Section 9 Troubleshooting; Troubleshooting The Ec1000 Controller; Test Diagnostic Menu - Hach EC1000 Instruction Manual

SECTION 9 TROUBLESHOOTING

9.1 Troubleshooting the EC1000 Controller

9.1.1 Test Diagnostic Menu

The diagnostic menu is a special menu for troubleshooting and setting the user
programmable keyboard lockout code. The menu is entered from the normal operating
mode (displaying pH or mV) by pressing both
entered, the user can scroll through the following menu entries:
Note: Entry into the diagnostics menu is not allowed if the keyboard is locked.
See Section 2.2.6 Keylock.
DISPlay TeST: Pressing
test patterns to determine if the displays are functioning correctly.
The test patterns are as follows:
1. All LEDs on.
followed by:
2. All LEDs off.
3. A * scrolling through the main display.
4. An 8 scrolling through the lower display.
5. The display stepping through the digits 0, 1,2...9
ReLaY TeST: Pressing
ENTER
operations to determine if the relays are functioning correctly.
The relay operation can be checked two ways. The first is to listen for six relay clicks. For
an additional check, check the relay contacts with a digital volt meter (DVM). The relay
sequence is as follows:
1. Close all relays.
2. Open all relays.
3. Close the Alarm 1 relay.
4. Close the Alarm 2 relay.
ENTER
at this menu entry runs the display through a sequence of
ENTER
at this menu entry runs the relays through sequence
91
and at the same time. Once
CLEAR