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View the current calibration settings by selecting the “3: VIEW CURRENT CAL” option from the APL
SETUP menu. The current calibration settings screen is displayed. Line one shows the current Ohms per
foot or Ohms per Meter multiplier used to convert resistance to distance. Line two shows the outgoing offset
resistance in Ohms which should be equivalent to the outgoing extension wire total resistance. Line three
shows the return offset resistance in Ohms which should be equivalent to the return extension wire total
resistance.
APL SETUP:
1: CAL ZERO PT.
2: CAL END PT. /SPAN
3: VIEW CURRENT CAL >
CAL SETTINGS:
Ohm/ft: 0.282
Ohm offset Out: 0
Ohm offset Ret: 0
APL Setup Menu Screen Current Calibration Settings Screen
Junction Test Bypass - The CTM-530 features a thermocouple junction test on each input circuit which
verifi es a valid junction exists before attempting to measure a temperature. This test must be enabled at all
times during normal operation to ensure valid temperature readings. To allow testing of the temperature
measurements of each input using a thermocouple calibrator the junction test must temporarily be disabled.
To disable the junction test enter the setup menu and select the “6: JUNCTION TEST” menu item and
press the “OK” button. The “TC JUNCTION TEST” setup screen will be displayed. Use the up/down
navigation buttons to toggle the test between the ON/OFF positions as required and press “OK” to accept
the selection.
SETUP: TECH
4: DISPLAY UNITS
5: APL SETUP
6: JUNCTION TEST >
TC JUNCTION TEST
Use UP/DOWN to toggle.
Then press OK.
TEST: ON
Setup Screen Junction Test Bypass Screen
Note: During normal operation the Junction Test must be in the enabled “ON” position. When set to
“OFF” the junction test will be disabled until set back to “ON” by the user or the CTM-530 is power cy-
cled.
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