Omega HH911T, Руководство пользователя

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Service Information
4-11
4. S
ERVICE
I
NFORMATION
Inspection and Cleaning
To extend the life of the instrument, inspect and clean the instrument regularly. Inspect the
instrument for any significant abrasions, cuts, cracks, dents, or other signs of damage on
the case, keypad, and display lens. Inspect the connectors for breaks, dirt, or corrosion.
Ensure all screws are securely fastened, and if equipped, that the tilt stand/magnet/hanger
is in good condition and locks into position properly.
With all screws securely fastened and the battery compartment cover in place, use a damp
cloth or towel to wipe down the instrument. Use care to avoid scratching the display lens.
Mild, non-abrasive detergents may be used providing the instrument is then wiped down
with a clean damp cloth or towel.
Calibration
4.2.1 Verification Procedure
1. This procedure shall be performed within environmental conditions of 23 ±1 °C
and 5% to 95% RH.
2. The unit under test (“UUT”) shall be acclimated to the controlled environment for a
minimum of four (4) hours.
3. The equipment listed in Appendix A is required to fully verify the UUT to the
expanded instrument uncertainties specified in Appendix B.
4. Refer to Appendix C for standard measurement points and tolerances for each
thermocouple type.
5. One, several, or all the available thermocouple types may be verified as
necessary. In the steps below, use the appropriate Thermocouple Cable and
Thermocouple Calibrator settings as appropriate for the desired thermocouple
type.
6. For two channel UUTs, both channels may be verified concurrently.
7. Set the UUT parameters as shown in Figure 10 below. Refer to Section 3.3, Setup
Menu as necessary for UUT parameter setup instructions.
P
ARAMETER
V
ALUE
Thermocouple Type As Desired
Temperature Units °C
Offset Ch. 1 0.0 °C
Offset Ch. 2 (HH912T only) 0.0 °C
Open Wire Detection On/Off
As Needed (see Section 3.11, Open
Wire Detection On/Off)
Figure 10: UUT Verification Parameter Settings
8. Connect the miniature thermocouple connector of the Thermocouple Cable to
Channel 1 of the UUT.
a. For two channel UUTs using the Split Thermocouple Cable, connect the
miniature thermocouple connector of one leg to the UUT Channel 1
input, and the miniature thermocouple connector of the other leg to the
Channel 2 input.