Troubleshooting; Error Messages; Common Problems And Solutions; Figure 10-3: Digital-To-Analog Output Jumper Locations - Honeywell SC Series Installation Instructions Manual

SC 2000, SC2001, SC3004

Figure 10-3: Digital-to-Analog Output Jumper Locations

DAC. ZERO
SCALE
Output
CHANNELS WITH VOLTAGE OUTPUT
0 V to 5 V 2.5 Volts
±5 V 0 Volts
0 V to10 V 5 Volts
±10 V 0 Volts
CHANNELS WITH CURRENT OUTPUT
4 mA to 20 mA 4 mA
4 mA to 20 mA 12 mA
J30 J31
DAC. FULL
jumper jumper
SCALE
Output
5 Volts open closed
5 Volts open open
10 Volts closed closed
10 Volts closed open
20 mA open open
20 mA open closed

10.7 Troubleshooting

10.7.1 Error Messages

See "Error Messages" on page 73 for information relating to error
messages.

10.7.2 Common Problems and Solutions

Erratic Display
• Check electrical connections for continuity and the trans-
ducer's wiring code from its Certificate of Calibration.
• Make sure that the load on the transducer is constant.
• Check millivolt input to the (+)Signal ("+SIG") and (-)Signal
("-SIG") pins with a voltmeter.
+OVLD or -OVLD on Display
Indicates that the voltage across the (+)Signal ("+SIG") and (-)
Signal ("-SIG") pins is overranging or underranging the amplifier
circuit. Make certain all wires are connected properly.
If you remove all load from the transducer and you still see this
message, the (+)Excitation ("+EXC") or (-)Excitation ("-EXC") pins
may be shorted to the (+)Signal ("+SIG") or (-)Signal ("-SIG")
pins.
If you remove all load from the transducer and you get a numeric
reading, the transducer may have a high zero offset. Use the
channel's SETUP menu and set DIAGNOSTICS -> DISPLAY ADC to
"ON"; in the RUN mode this will allow the [VALUE] button to dis-
play raw A/D readings as a percentage of its full-scale. If the raw
A/D readings display more than +/-10% when there is no load on
the transducer, the transducer has a high zero offset.
008-0608-00
Rev. G,
Honeywell Sensing and Control 37