1314-900 Revision BA
250W Precision Calorimeter
15
Adjusting Coolant Flow
1.
Use the adjusting knob to set flow rate.
The displayed flow rate will not change quickly due to the filtering taking place inside the 1314
but an increase or decrease can easily be detected when adjusting the knob. It typically takes
about 30 minutes for the flow rate to reach a steady state value, so patience is needed here. Once
the proper flow rate (> .5 GPM to ~.55 GPM) has been reached, little to no adjustment should be
necessary in the future. Only add coolant to the reservoir to maintain the proper level. Replace
reservoir cap and fill port cover. Observe the flow for some time after flow has been established,
looking for any air bubbles in the clear PVC tubing and around the filter at the rear of the unit.
2.
Check chiller display.
If there is insufficient (less than .05 GPM or .2 LPM) or no flow for 30 seconds all functions are
disabled and only the low flow light and temperature display remain on. The priming sequence
can be reinitiated by pressing the up and down arrow keys simultaneously. Repeat this step 3 to 5
times if needed. If the flow cannot be established proceed to next step.
3.
If flow cannot be established on the entire system, this time replace the system tubing with a
short loop and repeat step 2 to establish the flow. Then reintroduce the system tubing and
load and repeat step 2. If there is still no flow, go to step 4..
Figure 12: Flow adjustment knob
Figure 13: Reinitiate Priming Sequence
