Sentry P2B-4/7 Installation, Operation & Maintenance Manual page 8

ƒ When the timers are set, make sure the selector switch is in the OFF position before applying power to the sampler
controller .
Counter
Set the counter by adjusting the DIP switches to the desired setting .
Starting the Sampler Controller
To start the sampler controller and begin sampling, select HAND or AUTO position using the selector switch .
ƒ HAND position: Hold the selector switch in the HAND position . The sampler extends and remains extended until
the selector switch is released . When the switch is released, the sampler retracts and the sample is deposited .
ƒ AUTO position: Place the switch in AUTO position to initiate continual sampling . A light indicates that the sampler
is in Auto mode . An optional relay is provided to allow remote starts . A jumper must be removed and a circuit must
be completed . See the electrical wiring diagram for details .
Stopping the Sampler Controller
ƒ To stop the program and return the sample probe to the retracted position, place the selector switch in the OFF
position .
 NOTE:
An emergency stop, if required, shall be provided by others .
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CTR120
Sentry Equipment Corp