Discontinued – Max Machinery 286-300 SERIES TRANSMITTERS User Manual

Page 15

Temperature Considerations

Continuous exposure of the stator housing and the circuitry to high ambient temperatures should be
avoided if possible. It is a good idea to locate both of these components away from hot spots such as
steam pipes, ovens, and heaters. The circuitry in the remote enclosure is rated for operation up to 80°C,
so this is the limit on the ambient air temperature at the enclosure. At the flowmeter, the metered fluid
temperature should not exceed 130° C (265° F) (stator insulation limitation) and the ambient
temperature should not exceed 105° C (220° F) (PVC cable jacket limitation).

Outputs, Options, Indicators

See pages 6-8 of the manual for detailed explanations of the transmitter’s outputs, options, and
indicators. The diagram below points out the location of the features on the printed circuit board.

Appendix A: Remote Mount Transmitter

D10: Direction/Phase B (Terminal 6
Status) (High = Green, Low = Red)

S4-2: Output Select (2- Phase

or Combined Output)

S5: Calibrate Stator Offsets

(and Angle). Need S3 in
position 0 to start Calibration.

S3: Output Frequency Select

And Calibration Enable

D7: Microcontroller Memory

Status (On = Fail)

S4-1: Select Meter Type
Type

Stator Phase A

Stator Phase B

Common

S1-1: Ground

S1-2: Filter

Terminal Block
1. Case (Green)
2. Common (Black)
3. Power 5-30VDC (Red)
4. Combined Output (White)
5. Phase A Out (Orange)
6. Phase B Out or Direction (Blue)

S2: Reset Microcontroller

D8: Flow too low to calibrate

D9: Calibration Active

D3-D6: RVDT Rotor Position
Indication (4 LED’s)

2-Phase

Combined

Position

Output

0 (Calibrate)

100

200

150

300

250

500

300

600

500

1000

Cycles per Revolution

* Not Specified, Usually same as S3=8

Testpoints

J4: Stator Cable Terminal Block

Wire Colors Denoted on PCB
“DRN” indicates the Drain wire
Connected to cable shielding

D11: Output/Phase A (Terminal 4 & 5
Status) (High = Green, Low = Red)

(15)

Discontinued