InstroTek ValiDator - Verification Procedure for Gauges Not Supported by the Validator

InstroTek
20
Verification Procedure for Gauges Not Supported by the Validator
For gauges not supported you can establish a history and determine when each
individual gauge falls outside a ±1% limit. Observe the following procedure to
establish a verification process for gauges not supported.
Example:
1. Send your gauge to a calibration facility for a calibration.
2. When you receive the gauge, take a four-minute Standard Count. Use the
following form or generate your own spread-sheet program.
3. Take four minute WD and M readings on the ValiDator at each depth and
enter in column A and D for density and moisture, as baseline readings.
4. At a later date, for example, every six months take readings and store in B
and E.
5. Compare A to B and D to E, and determine differences between C and F.
6. If any of the WD numbers are outside of ±1.5 lb/ft
3
(±24 Kg/m
3
) difference or
M outside ± 1.0 lb/ft
3
(±16 Kg/m
3
), take readings again. If it fails again, the
gauge needs to be calibrated.
Note: This procedure assumes that the Calibration received is accurate. For re-
calibrating these gauges contact InstroTek.
Depth
A
B
C
D
E
F
Date
12/7/2017
6/7/2018
12/7/2017
6/7/2018
S/N 7022
S/N 7022
Difference
PCF
B - A
Dif.
E - D
BS
150.2
150.6
0.4
5.6
5.7
0.1
2
118.5
117.6
-0.9
4
136.2
135.2
-1.0
6
132.1
132.0
-0.1
8
125.0
125.5
0.5