Calculating the correction factor
May 2019
LM_OG-AM_BA_02_1163
Page 7
7.
CALCULATING THE CORRECTION FACTOR
Two different ways are described below to eliminate the existing deviation of a meter.
The reference quantity (“quantity dispensed”) should always be measured with an appropriate measuring device.
•
Approved piston or bell prover
•
Approved gravimetric method
7.1
Calculation based default settings
Example:
Quantity dispensed:
5,000 liters
Quantity displayed:
4,990 liters
Correction factor k:
4,990 / 5,000 = 0,9980
7.2
Recalculation of an existing correction factor
Example:
Quantity dispensed:
5,000 liters
Quantity displayed:
5,015 liters
Correction factor k:
5,015 / 5,000 = 1,003
The existing correction factor would be for example: 0,9960
Calculation: 0,9960 x 1,003 = 0,9989
The new correction factor is 0,9989
8.
PULSE OUTPUT AT REGISTER OG-TAERM
The pulse output on the LM OG-TAERM register has a rating of 2x100 PPL with a 90°-135° phase-shift. Any irregular use or
malfunction will be indicated on the error channel with permanent signal on high. The correction factor will also correct the
output signal.
Flow direction - Inlet Top to Bottom
Power supply
Output channel 1 = green
6–24 VDC = yellow
Output channel 2 = white (Error channel)
GND = brown
Flow direction - Inlet Bottom to Top
Output channel 1 = white (Error channel)
Output channel 2 = green
Wiring only for MDS2000 Management System
Wiring for other Management System
MDS version included a meter detection
Viscosity 440 mPas
Factor k about 1,0000
OUTPUT 1
OUTPUT 2
GREEN
WHITE
GND
BROWN
6-24 VDC
YELLOW
OUTPUT 1
OUTPUT 2
GREEN
WHITE
GND
BROWN
6-24 VDC
YELLOW
