6. Operations and Adjustments
24
PNEG-2174
Sampler - Model GRA
2.
Internal Settings
The 366 digital display counter must be removed from its housing to alter the count range.
The 366 has three ranges.
1x = Counts single pulses to 999
10x = Counts every tenth pulse to 9,990
100x = Counts every hundredth pulse to 99,900
Each range is selectable using finger force on the white plastic lever behind the front face of the
counter. In two of the three possible lever positions, an indicator will appear in a range window
located on the front face of the counter. When nothing appears in this window the count is in
the x 1 range.
NOTE:
The counter chassis and the housing are polarized so that the chassis cannot be inserted into its
housing upside-down. if the counter is forced into the housing upside-down damage will result.
Off Delay Timer T-2
This internal timer starts timing after the sample timer T-1 or counter C-1 has signalled to take a sample.
This timer turns on the sampling light to indicate a sample is being taken. An approximate setting of
1 to 3 seconds is required to provide an indication that a sample is being taken.
Main Fuse
This fuse, located in a fuse block within the controller enclosure, protects the controller and sampler
components against overloads and short circuits.
For 110/120 VAC, 1 PH operation use ONLY a Buss Type FNM, 4 Amp, 250 Volt Slo-Blo fuse or equal.
For 220/240 VAC, 1 PH operation use ONLY a Buss Type FNM, 2 Amp, 250 Volt Slo-Blo fuse or equal.
Index Relay IR-1
This mechanical latching relay signals the sampler solenoid valve V-1 coils. When the relay coil receives
a momentary signal from either the timer T-1 or the manual sample switch the maintained switch contacts
change to the alternate position. Upon changing position, the opposite solenoid valve coil receives power,
the valve spool switches and a sample is taken.
Terminal Strip
This 10-position barrier terminal strip serves as the controller’s interface and connection point for all
external circuits and for the components mounted on the enclosure’s front panel. Refer to the certified
electrical drawing(s).
