Honeywell SC Series Installation Instructions Manual page 44

Signal Conditioning, Self Calibrating Digital Indicators
Analog Output Incorrect
Make certain of the type of Analog Output (voltage or current)
that the channel is equipped with; see "Identifying the Output
Type" on page 36.
Use the DIAGNOSTICS -> DAC FULL SCALE and DIAGNOSTICS -> DAC
ZERO SCALE menu items to force the Analog Output to a known
output. Then, adjust your readout device, panel meter, PLC or
data acquisition system to match.
Check the output selection jumpers; see "Output Selection" on
page 36.
"APPLY 00000" on Power-up
The channel has detected that the transducer connected to the
instrument is different than the one the channel was last calibrat-
ed with. Because the CALIBRATION TYPE is set to either Shunt Cali-
bration or mV/V Calibration, the instrument is prompting you to
apply zero load in order to auto-calibrate to this new transducer.
Do one of the following, depending on the situation:
• Re-connect the original transducer to the channel and re-
start the instrument.
• Press [ENTER] to re-calibrate the channel to this new
transducer using Shunt or mV/V Calibration and accept the
presently applied load as "0". (In situations where one can't
apply "0" load to an absolute pressure transducer or a load
cell with a pre-load, you can change the CALIBRATION DATA
-> ZERO-SCALE VALUE menu item from "0" to a load that can
be applied. For example, 14.7 PSIA or the known pre-load on
the load cell.
• Use the CALIBRATE menu item to perform a Known-Load Cali-
bration with this new transducer.
Auxiliary Function Pins Not Operating
Make sure that the AUX1 FUNCTION or AUX2 FUNCTION SETUP menu
items are set correctly; if they are set to DISABLED then they will
not operate.
The Auxiliary Function ("AUX1" and "AUX2") pins must be con-
nected to pin 10, not pin 8, to activate them.
38 Honeywell Sensing and Control
Sensitivity to EMI/RFI
To obtain maximum immunity to electromagnetic or radio frequen-
cy interference, make certain that the shields of the transducer
cables are connected to the "cable shield connection screw" on
the rear panel of the instrument. See "Unamplified Transducer
Connection to Strain-Gage Input Channel" on page 27, "External
Arrangement of AC powered SC2000" on page 10 and "External
Arrangement of Model SC3004" on page 15.
Shunt Calibration Feature not Operating
To activate the channel's shunt calibration function while the in-
strument is in RUN Mode, see "Shunt Calibration Check" on page
7. This serves as a quick check of the shunt cal feature.
008-0608-00
Rev. G,