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3700 Portable Samplers
Section 3 Programming Guidelines
3.9.14 Enable Pin
3-48
An entry of 0 eliminates the delay to start time; the start time
occurs the moment you press start sampling. For example, if you
press start sampling at 10:32:15, the sampler will initiate a
time-paced sample event at 10:32:15.
The sampler will start clocking time intervals at the beginning of
the minute (HH:MM:00) of the first sample event. If a sampling
routine required 10-minute intervals and you pressed start sam-
pling at 10:32:15, the sampler would begin the time interval at
10:32:00. It would initiate the second sample event at 10:42:00.
The sampler would begin the flow interval at 10:32:15 for
flow-paced routines.
If you entered a start-time delay of 1, the sampler would begin
the routine at the beginning of the next minute. Thus, if you
pressed start sampling at 10:32:15, the sampler would initiate
the sample event at 10:33:00. The sampler would begin time and
flow intervals at 10:33:00. If you enter a start-time delay of 2, the
sampler would begin time or flow intervals at 10:34:00. (Display
#310)
Note
If you enter a start time, the sampler will disregard the start-time
delay. The sampler will use the start-time delay setting when
you do not enter the start time in the program sequence. When
using a start time delay of greater than 0, take care when the
sampler is being inhibited by another sampler, a flow meter, or a
Liquid Level Actuator.
The Enable Pin option allows you to program the sampler's
response to a device controlling pin F of the flow meter connector,
for example, a 4200 Series Flow Meter, a 4100 Series Flow
Logger, or the 1640 Liquid Level Actuator. There are four Enable
Pin setup options: Sample Upon Disable, Sample Upon Enable,
Reset Sample Interval, and Inhibit Countdown. The sampler dis-
regards the Enable Pin configure option settings when running a
storm routine. Each of these options is discussed below.
Master/Slave Operation – The first input display, "MASTER
SLAVE MODE?" is used to enable or disable the master/slave
feature. Enabling the master/slave feature allows you to connect
two samplers in a master/slave relationship. Using samplers in
master/slave pairs allows you to conduct continuous sampling:
one sampler can perform a sampling routine while the other
sampler awaits servicing. The samplers must be connected with
the Master/Slave Interconnect cable. This cable is attached to the
flow meter connector on both samplers.
While the master sampler is performing its sampling routine, it
sends an inhibit signal out on pin D. The slave sampler receives
the signal on pin F and remains dormant until the master
sampler completes its routine. At this point, the samplers reverse
roles.
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