5
ROUTINE MAINTENANCE
Low Temperature Verification
5-14 TP04300 Series Interface & Applications Manual
Verify DUT “T” or
“K” Modes (Low
Temp.)
Verify DUT “RTD”
(Low Temp.)
15 To restore the System, access the Utilities Screen and set "Flow: Off" which
prevents running to a Setpoint; next disconnect the Monitor “Y” cable
connectors, which generates an "Error" prompt on the Statusbar (at top of
screen); reconnect the main Air thermocouple plug into the System female
receptacle; the "Error" will not clear automatically; access Utilities Screen to
set "Flow: On."
16 If the difference between the Monitor and System readings is between (within
the range of) ±1.0 °C, then no re-calibration is required. Restore the System as
given above (or continue Low Temperature verification with the DUT Modes
(T, K, RTD, Diode sensors) below.
Step Action
Step Action
17 Access the Utilities Screen and set "Flow" to Off.
18 Set the external precision temperature Monitor output to -60.0 °C.
19 Insert the Monitor male plug into the appropriate sensor port on the System’s
rear I/O Panel: if verifying DUT T sensor, then choose the “DUT T” port; if
verifying DUT K sensor, then choose “DUT K” port. Be aware of plug pin
polarity (do not force the wide pin into the narrow opening).
20 Access the Setup Screen and
a) set "DUT Sensor" to "T-Type" or "K-Type," and
b) note that the System defaults to "DUT Mode: Air." If System was preset to
"DUT Mode: DUT," then be certain to reset "DUT Mode: Air" to prevent
heater damage.
21 This is NOT doing a DUT Mode test setup, where the DUT controls
temperature: it is a DUT sensor Verification setup, which procedure will be
driven by the Monitor output, interfaced as given above.
22 Allow the System temperature to stabilize, read the DUT temperature displayed
on the System, an.d record the System DUT temperature in the Low
Temperature Verification (page 5-13).
23 Compare the Monitor temperature setpoint value to the System displayed DUT
temperature. If the difference between the Monitor and System DUT values
is greater than -60.0 ±1.0 °C, then recalibrate the System as given in
Calibration (page 5-20).
24 You may repeat the procedure for the other sensor type, or verify DUT RTD or
Diode, or proceed to verify Type T, or Type K, High temperature (High
Temperature Verification, page 5-17) or restore the System by disconnecting
the temperature Monitor from the System rear I/O panel, and accessing Utilities
Screen to set "Flow: On."
Step Action
25 Access the Utilities Screen and set "Flow" to Off.
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