TECHNICAL DESCRIPTION
ULTRAFLOW® 54 DN150-300
Kamstrup A/S
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Technical description
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5512-876_M1_GB_12.2020
51
9.5
Pulse Tester
During a calibration process it is often practical to use Pulse Tester type No. 66-99-279 with the following functions:
Galvanically separated pulse outputs
Integral supply for ULTRAFLOW
LCD-display with counter
Externally controlled ”Hold” function
Can be mounted directly in a MULTICAL
base unit (type 66- and 602-)
Technical data of Pulse Tester
Pulse inputs (M1/M2)
Counter inputs
Max. frequency: 128 Hz
Active signal
Amplitude: 2.5 - 5 Vpp
Pulse duration
1 ms
Passive signal
Internal pull-up 680 k
Ω
Internal supply
3.65 V lithium battery
Please note: Depending on the connecting base used there are one or two pulse inputs/outputs.
Figure 45
1
Flow sensor with transistor output
The transmitter is normally an optocoupler with FET or transistor output to be connected to terminals 10 and 11
for water meter M1 or terminals 69 and 11 for water meter M2.
The leak current of the transistor must not exceed 1
A in off-state, and U
CE
in on-state must not exceed 0.5 VDC.
2
Flow sensor with relay or reed-switch output
The transmitter is a reed-switch, which is normally mounted on vane wheel and Woltmann meters, or the relay
output of e.g. MID-meters. This type of transmitter should not be used as the quick pulse input of the Pulse Tester
may regard bounce from the transmitter as pulses.
