Click here to go to UPSCALE home page.
Click here to go to I Year Lab home page.
You can jump directly to a section of this specification sheet by selecting an item below and clicking the left button.
Gravity Meter
![[image]](gifs/sodin410.gif)
Manufacturer: W. Sodin Ltd.
Model: 410
Cost: $16,000 (1975)
Description
Sensitive balance; measures and indicates minute changes in gravity.
Specifications
| Range (reset) | 6000 mgals |
|---|
| Fine Counter Range | 1000 div. x scale constant |
|---|
| Fine Counter Constant | 0.10055 mgal |
|---|
| Fine Counter Linearity | 1 in 1000 |
|---|
| Accuracy | 0.1 counter div. |
|---|
| Drift | 0.05 mgal/day or better |
|---|
| Level Sensitivity | 40 sec./mm |
|---|
| Temperature Coefficient | < 0.003 mgal/hr/°C external charge |
|---|
Click here to go to the top of this page.
Operating Instructions
- To check beam position: Set counter to approximately 500 divisions. Rotate reset screw as required until beam is centred with eyepiece scale.
- To check beam sensitivity: Observe beam and turn counter until beam moves to first large scale division (on either side of centre line). If more than 20 full counter divisions/units are needed, the beam sensitivity is too low. Adjust beam sensitivity by turning the front foot screw clockwise. Rotate in opposite direction if less than 16 division/units are needed to move beam between large scale divisions.
- To read the meter: Multiply the counter reading with the meter constant (0.10055). For example, a counter reading of 574.4 mgls. x 0.10055 (contstant) = 57.75592 mgls.
CAUTION
- Do not force counter reading beyond 1000 Range.
Click here to go to the top of this page.
keywords: physical property measurement device, gravity measurement device.
Document created July 19, 1996. Original author: Jaime Espinoza.
Last updated 08/13/96. Revised by David Harrison.