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Entek IRD 6687 Protection Monitor
6687 Monitor
1.
Connect a DC voltage source to the channel 1 input terminals (1 and 2). Refer to
“Signal Inputs for Testing” on page 26 for details. Set the input voltage to a voltage
between the LO Alert and HI Alert settings. These are the ALT1 LO and ALT1 HI
options on the ALARMS submenu (page 17)
2.
Connect a multimeter to the channel 1 Alert relay terminals to test for continuity (28
and 29). You could also connect to the channel 1 relay N/O instead of the N/C terminal
(29 and 30).
3.
Increase the input voltage so it is between the HI Alert and HI Danger settings for
channel 1 of the monitor.
4.
If the LATCHED option is set to YES, you may have to manually reset the relays by
pressing the RES button on the front panel of the monitor.
5.
Test the state of the channel 1 Alert relay terminals (open or closed). The state should
change when the input signal exceeds the HI Alert setpoint. Depending on the
GLOBAL option setting in the DELAYS submenu (page 24), it may take up to 30
seconds before the relay changes state.
6.
Adjust the input voltage until the measurement value goes above the channel 1 HI
Danger setpoint.
7.
Test the state of the channel 1 Danger relay terminals. The state should change when
the input signal exceeds the HI Danger setpoint. Depending on the GLOBAL option
setting in the DELAYS submenu (page 24), it may take up to 30 seconds before the
relay changes state.
Note: There are two Danger relays for each channel; remember to test them both.
Repeat this process to test the LO alarms for channel 1 (if used), and then the HI and LO
alarms on channel 2. Remember that the HI alarms use the same alarm relays as the LO
alarms.