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Starter Kit Instruction Manual Maintenance 46
8.4.2 TCU151 temperature controller
calibration
! WARNING ! Keep in mind that during
the calibration procedure, the instrument is
powered on.
Before beginning
[1] Power off the instrument.
[2] Open the TCU151 top cover (1) to access
the TCU151 main board (2 ).
Material needed
• Voltmeter HP3458A or equiva le nt.
• Voltage source Keithley SMU237 or equiva-
lent.
• Precision resistor 100 Ohm 1% or better.
• Cable: LEMO 6 poles female 6 banana s fe-
male (LEMO connector: LFGG.1B.30 6.CLAD72Z,
LEMO handler GMA.1B.065.DG).
Procedure
+5V/-5V power supply check.
CAUTION ! Do not connect the signal IN-34
V DC (connector J1 (3)).
[1] Check the input impedance between +5V/-
5V and GND
note: The values should be:
– TP1 (4) - GND (5): > 5 kΩ.
– TP2 (6) - GND (5): < 4 kΩ.
[2] Power on the instrument.
[3] Check the +5V/-5V power supply volt-
age.
Note: The values should be:
– TP1 (4) - GND (5): 4.95 to 5.2 V.
– TP2 (6) - GND (5): 4.95 to 5.2 V.
2
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TCU151
Fig.37: Removing the top cover
3
6
5
4
Fig.38: TCU151 main board