BioProTT
TM
Flow Measurement System
Version 1.00
page 52 of 75
8.4
Checking Current Loops of Flow Meter
Current loops (Flow or RSS) can be tested with different measurement configurations
described in this chapter. Please make always sure that a Clamp-On Transducer is
connected and actual flow is occurring so that a reading is possible.
8.4.1
Method 1 – Using Power from Flow Meter and Measuring with
Ampermeter
Figure 16: BioProTT flow meter rear view with one analogue plug connected -example w/ RSS socket
Pin No
Signal
Wire colour
(in supplied cabling)
Connected with
1
24 V (24C_in)
Brown
Connect pin 1 with pin 2
2
Current Loop +
White
[see above]
3
Ground in
(GND_in)
Blue
Connect pin 3 to the appropriate
connector of your reading device
/ data logger, e.g. “return” or “-“
of an ampermeter
4
Current Loop -
Black
Connect pin 4 to appropriate
connector of your reading device
/ data logger e.g. “send” or “+”
of an ampermeter
Figure 17: Schematics - looking at pins of rear of flow meter of either Flow or RSS socket
3
4
2
1
PIN 1: +24 V
PIN 3: Ground (GND)
PIN 4: Current Loop (-)
PIN 2: Current Loop (+)
Return (-)
Send (+)
of ampermeter
-
A +
