Red-lion TSC User Manual download pdf (Page 85)

CALIBRATION

When calibration is required (generally every two years),

this procedure should only be performed by qualified

technicians using appropriate equipment. Equipment source

accuracies of 0.01% or better are required.

The procedure consists of four parts: applying accurate

mV signals, setting the thermocouple cold junction

temperature, applying precision resistances and measuring

accurate mA currents. Allow a 30 minute warm-up period

before starting this procedure. Do not use thermocouple

wire at any stage of calibration.

This procedure may be aborted by disconnecting power

to the controller before exiting the configuration mode. The

existing calibration settings remain in affect.

Note: After completing any of the calibration sequences, the

controller will default the input sensor type to

thermocouple type “j” (tc-j). Be sure to set input sensor

for proper type.

-83-

Millivolt Calibration (CAL)

Connect precision millivolt source with an accuracy of 0.01% to terminals (+) #9 and (-) #10.

Display Parameter Description/Comments

Code Enter factory

service 48 Calibrate instrument

function code

CAL Millivolt yes/no Calibration required for both RTD and TC input. If this

calibration procedure is performed the cold junction temp. and RTD

ohms calibration procedures in turn must be completed.

CJC Thermocouple yes/no Not required if only using RTD input. This procedure can

cold junction only be performed AFTER an accurate mV calibration.

temperature

calibration

rtd RTD yes/no Not required if only using TC input. This procedure can

resistance only be performed AFTER an accurate mV calibration.

calibration

ANCL analog output yes/no This parameter does not appear if analog output option is

not installed.

Display Parameter Description/Comments

StP1 0.0 mV step Apply 0.0 mV, wait 10 seconds, press PAR

StP2 9.0 mV step Apply 9.0 mV, wait 10 seconds, press PAR

StP3 18.0 mV step Apply 18.0 mV, wait 10 seconds, press PAR

StP4 27.0 mV step Apply 27.0 mV, wait 10 seconds, press PAR

StP5 36.0 mV step Apply 36.0 mV, wait 10 seconds, press PAR

StP6 45.0 mV step Apply 45.0 mV, wait 10 seconds, press PAR

StP7 54.0 mV step Apply 54.0 mV, wait 10 seconds, press PAR

Stp- Pause The controller imposes a 5 second delay. (Keep the 54mV signal applied)

The unit advances to CJC - NO.

Configure Step 9 - Factory Service Operations (9-FS)

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Red-lion TSC User Manual Page 85

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