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BATTEOY OEPLACEMENT
Battery powered monitors use a single 1 5V, D size, alkaline battery When replacement is needed, use a clean, fresh battery to
ensure continued trouble-free operation It is recommended that the total be saved to memory before the battery is removed
1 Carefully unscrew the enclosure cover to access the circuit board
2 Remove the four screws securing the circuit board to the enclosure
3 Lay the circuit board to the side being careful not to pull any wires from their connections
4 Clip the battery retaining wire/strap and remove the battery
5 Replace the battery, being sure to observe the proper polarity and install a new retaining strap or wire
6 Reassemble the monitor, reversing the disassembly process
ADDITIONAL INPUT OPTIONS
The B2800 flow monitor is capable of receiving magnetic pickup input (small signal sine wave) or a contact closure input
(pulse) Since most Blancett turbine flow meters utilize a magnetic pickup, the B2800 flow monitor is shipped configured for
magnetic pickup input To change to a contact closure input, remove JP2 from the bottom two pins and jumper them to the
top two pins See
Figure 7
External
Totalizer Reset
30V DC (Max)
10k
20 mS Pulse
Battery Power
November 2017
Pulse Input Card
30V DC (Max)
10k
20 mS Pulse
Analog Input Card − 4-20 mA
(Loop Supply Voltage - 5)
R
MAX =
0.02
Figure 6: Wiring diagram
Pulse
Inuput
Pulse Out
4-20 mA
Freq. In
+ - + - + -
Mag
Input
N/C N/C
Figure 7: Circuit board layouts
DSY-PM-00278-EN-04
Pulse
Inuput
Pulse Out
4-20 mA
Freq. In
+ - + - + -
Mag
Input
+ Pulse In
- Pulse In
Magnetic Pickup
10...30V DC
- Common
External
Totalizer Reset
30V DC (Max)
10k
20 mS Pulse
10...30V DC
1...5V DC
250 Typ
Battery Replacement
Pulse
Inuput
Pulse Out
4-20 mA
Freq. In
+ - + - + -
Mag
Input
(Loop Supply Voltage - 5)
R
=
MAX
0.02
Loop Power
Page 9
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