Eriez 1250 ANALOG, Installation, Operation And Maintenance Instructions

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h. MANUAL/AUTO RESET
MANUAL RESET
In the manual reset mode, once the unit has tripped,
the Detector’s Direct Output provides a continuous
alarm indication to alert the operator of detected
metal and/or to stop the belt. To reset the unit, the
reset button located on the front panel must be
manually depressed.
AUTOMATIC RESET
The Detector may be converted to an “Automatic
Reset Mode. In this mode, the Detector will momen-
tarily signal when tripped then self-reset.
The direct output can be programmed to automat-
ically reset by shorting the remote reset terminals
TB1 pins 5 & 6, located on the front of the Interface
Module. To “short”, install a jumper from pin 5 to pin
6. Open Switch S2-7. The operating mode of the
timed output is governed by the posi tion of Switch
S3-7 as shown in Table 4. With the switch in the
open position, the timed output oper ates in the
Automatic Reset Mode. When the switch is closed,
the timed output will follow the mode programmed
on the direct output.
I. RESET OvERRIDE
If required, the Detector can be programmed so
the system is disabled during the rest period. This
means the Detector is prevented from tripping as
long as a reset signal is provided, either manually
on the front panel or remotely through a set of ex-
ternal contacts
With S2-7 in the open position, the reset signal does
not disable the Detector. Closing S2-7 will program
the Detector so it is disabled while a reset signal is
applied. Refer to Table 5.
J. SAMpLING & TpD MODES
The Detector Sampling and TPD Modes are set at
the factory to make the Detector sensitivity selec-
tive between various materials as required for
each particular application. Switches S1-1 through
S1-3 inclusive are preset and are to be adjust ed
by the user.
k. TRIp REGISTER
The “Trip Register” is used with the Detector’s timed
output. The Trip Register accurately tracks, up to
128 metal particles concurrently. Each parti cle’s
signal is released to the timed output termi nals
consistent with the pre-programmed “Delay Before
Alarm”. This standard feature is automati cally ac-
tivated when the timed output is used for delayed
operation of any device.
part Iv - System programming
(cont.)
TABLE 4. TIMED OUTPUT RESET MODE (S3)
TABLE 5. BELT RESET OVERRIDE (S2)