ENMET MX-42A - Manual (Page 15)

MX42A C ONTROL ENMET Corporation
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4.3 Adjustment of alarm thresholds and averaging times of alarm 3
The alarms are adjusted at the factory. However, these adjustments can be changed.
N OTE : The fault lamp blinks to signal the channel is in maintenance mode. The maintenance mode lasts for 30
minutes. After which, the channel automatically changes over to fault.
Only one channel can be programmed at a time.
When a channel is in the maintenance mode, the 4-20 mA current output is set to 2 mA.
1 2 3 4 5 6 7 8 9 10
Example of Microswitch in Maintenance mode gray areas indicate position of each switch
For the selected channel, set the microswitches as follows:
Microswitch 8: in operation
Microswitch 7: maintenance
Microswitch 6: adjustment
In this mode, the pushbutton switches 1, 2, 3 and 4 have the following functions:
pushbutton switch 4 = to cycle through functions and ENTER
pushbutton switch 3 = to view setting of function
pushbutton switch 2 = to increase setting of function
pushbutton switch 1 = to decrease setting of function
The following is the cycle of functions:
AL1: alarm 1 threshold
AL2: alarm 2 threshold
AL3: alarm 3 threshold
T1: averaging time of alarm set at factory to 15 minutes.
PT: sets the position of the decimal point according to the sensor/transmitter measuring range. See S/T
manual for correct setting.
Example: To positioning alarm 3 at 150 for channel 2:
On the microswitch block of channel 2, position microswitch 7 to MAINTENANCE , 6 to ADJUSTMENT . The
LCD displays AL1.
Press pushbutton switch 4 twice. The LCD displays AL3.
Press pushbutton switch 3. The LCD displays the present value of the alarm 3 threshold.
Using pushbutton switches 1 and 2, to decrease or increase the setting, set the desired threshold.
Press the pushbutton switch 4 to ENTER . The threshold is now set.
Return Microswitch 7 to normal operation position.
Leave Microswitches 6 and 8 as above.