Omega HH931T, Руководство пользователя

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Service Information
4-3
5. Press UUT to turn the UUT on.
6. Set the UUT parameters as shown in Figure 13 below. Refer to Section 3.3, Setup
Menu as necessary for UUT parameter setup instructions.
P
ARAMETER
V
ALUE
Thermocouple Type Type E
1
Temperature Units °C
Offset Ch. 1 0.0 °C
Offset Ch. 2 (HH932T only) 0.0 °C
1
Other thermocouple types may be used in this procedure as desired. For instance, if the
UUT is used primarily with Type J applications, Cold Junction Compensation may be
aligned using Type J. Note however that the expanded instrument uncertainties provided
in Appendix A assume alignment using Type E.
Figure 13: UUT Alignment Parameter Settings
7. Insert the Straightened Paper Clip through
the alignment access hole and gently press
the calibration enable switch located on the
circuit board. See Figure 14 for location.
Voltage Gain and Offset Alignment
8. The UUT display will indicate as follows:
a. Line 1: CAL1
b. Line 2: mV portion of Channel 1 voltage reading
c. Line 3: nV portion of Channel 1 voltage reading
9. Connect the miniature thermocouple connector of the Copper Mini-TC Cable to the
Channel 1 input of the UUT.
a. For two channel UUTs using the Split Copper Mini-TC Cable, connect one
miniature thermocouple connector to the Channel 1 input of the UUT,
and the other connector to the Channel 2 input.
10. Connect the opposite end of the Copper Mini-TC Cable (or Split Copper Mini-TC
Cable) to the appropriate output connectors of the DC Voltage Source.
11. Allow at least three minutes for the connections to temperature stabilize before
proceeding.
CAUTION
Do not apply voltages greater than 80 mV DC to the UUT inputs. Voltages
greater than 80 mV may damage the instrument.
12. Set the DC Voltage Source to output the first Applied Voltage value in Figure 15
below.
13. Allow the DC Voltage source output to stabilize before proceeding.
Figure 14: Alignment Access Hole
Location