Instruction manual

3700R/3740 Refrigerated Sampler
Section 3 Programming Guidelines
3-37
Example Calibration shows how to calibrate the sampler for a
200-ml sample volume. You must enable the Calibrate Sampler
configure option in the configure sequence before the calibration
displays shown below appear.
Even without calibrating, the 3700 Sampler delivers accurate
sample volumes. If your sample volumes vary significantly with
the entered values, check the suction line first. Be sure the line
slopes continuously downhill and is draining completely after
each pumping cycle. Then, check the suction-line entries in the
configure sequence to see that they are accurate. The calibration
procedure is intended to be for “fine tuning” only.
After you enter the sample volume actually delivered, as shown
in Step 6, all subsequent sample volumes delivered will be
adjusted to correct for the difference between the expected
sample volume and the actual volume entered. Clear the
adjustment by changing a suction line entry in the Suction Line
configure option or by reinitialization of the sampler.
Because the sample volume can be calibrated to ± 10 ml, use a
graduated cylinder to facilitate measurement. Teledyne Isco
offers a graduated cylinder and spare bottles as accessories from
the factory. Refer to Appendix B for details.
The calibration pump cycle will include rinse cycles and retries, if
the sampler is configured to perform them. This ensures that the
calibration procedure includes the pump cycle used while
running the sampling program.
When the pump reverses for the pre-sample purge, the second line disappears. At the end of the pre-sample purge,
the pump runs forward to deliver the sample, and the second line appears on the display. This display remains
through the end of the post-sample purge.
SAMPLE 1 OF 48
PUMPING 250 ml
At the end of the sample event, the display changes to indicate the number and time of the next event. The lower right
corner reports the current time.
SAMPLE 2 OF 48
AT 6:15 6:00:33
The cycle repeats for the remainder of the sampling routine.
SAMPLE 2 OF 48
↓
↓
This display appears when the routine is complete. It reports the status of the routine (“DONE”), the total number of
sample events, and the current time and date.
DONE . . . 48 SAMPLES
6:10:35 21-JUN-04
Example: Time-Paced Composite Sampling (Continued)