Vernier Tech Info Library TIL #1414

Drop Counter Troubleshooting and FAQs

Vernier Drop Counter, order code VDC-BTD, $127.00
Specifications and User Guide

TROUBLESHOOTING
-Primary Test: If your Drop Counter is not counting drops, check the alignment of the sensor beneath the tip of the reservoir or buret. Adjust the Reagent Reservoir so that the drop passes closer to the center of the slot.
-Secondary Test: The Drop Counter works best when the drops fall at a rate of 2 seconds per drop or slower.

RELATED TIL ENTRIES
TIL 1136: Do you have a drop counter?
TIL 1783: LabQuest freezes after many drops with drop counter
TIL 1462: How can I improve my results with the Drop Counter?
TIL 1800: LabQuest does not see attached sensors. (Auto ID)

SPECIFICATIONS
-new order code: VDC-BTD
-old order code: none
-Detector Rise Time: less than 70 ns
-Detector Fall Time: less than 70 ns
-Power Requirements: 55 mA at 5 VDC
-Infrared Source: peak at 890 nm

CALIBRATION
-Calibrate? Not always. The sensor is set to use a default calibration of 28 drops/mL.
-You may manually enter a drops/mL ratio that was done from a previous calibration.
-If you choose to calibrate the sensor, you will conduct an automatic drops/mL calibration. Refer to the sensor booklet, page 6, "To Calibrate Drop Volume" for detailed instructions.

RELATED VERNIER PRODUCTS
Vernier Microstirrer, order code MSTIR, $13.00
Reagent Reservoir, 2 Valves, and Tip, order code VDC-RR, $15.00

Created by: jrandall on May 07 2005
Last updated by: aplank on May 12 2009