Yokogawa RAMC User Manual

Page 37

<6. ELECTRONIC TRANSMITTER (-E)>

6-11

IM 01R01B02-00E-E 10th edition January 01, 2013 -00

6.2.7.4 Calculation of pulse rate

Concerning the final flow-value (Qmax ), which was declared in the customers order, the pulse rate is
calculated in factory and is written onto the sheet ´Data of Pulse Output (Option /CP)´, which is included. This
value can be transferred to a blank label of the also included sheet with unit-stickers and then fixed on the
scale. After changing the flow rate unit with F12 the pulse rate must be recalculated.
Calculation of pulse rate :
· Read the value of Qmax from the scale or recalculate it.
· Search for the concerning range in the first row of the table below.
· Read the concerning pulse rates in the second and third row.
· The measuring unit is equal to the flow

Maximum flow Qmax

without unit

Pulse rate for F34-2

without unit

Pulse rate for F34-3

without unit

Qmax ≤ 1
1 < Qmax ≤ 10
10 < Qmax ≤ 100
100 < Qmax ≤ 1000
1000 < Qmax ≤ 10000
10000 < Qmax ≤ 100000

0.0001
0.001
0.01
0.1
1
10

0.001
0.01
0.1
1
10
100

e.g..: Final value (Qmax ) = 400 m3/h

→ Pulse rate 0.1 m

for F34-2 and 1 m

for F34-3

•

The factory default is F34 -2 (solution : 1 last digit).

• After Master Reset F34 -1 (Pulse output not active) is selected.
• After changing the flow rate unit with F12 the pulse-register is deleted and the pulse rate is automatically

redefined according to the new unit.
• After totalizer Reset with F14 the pulse output does not change.
• When changing the indication with F11 -3 to ´%´, the totalizer stops and the pulse output is switched off.
• After switching power on one pulse is generated at the output.
• For 2- respectively 3-wire-units the function F34 is not supported.

NOTE