User's Manual

150X Series

Calibration Manual

Calibration Adjustment

The Tester features closed-case calibration adjustment using known reference sources.

The Tester measures the applied reference source, calculates correction factors and stores

the correction factors in nonvolatile memory.

The following sections present the features and Tester function keys that are used during

the calibration adjustment procedure. Perform the calibration adjustment procedure

should the Tester fail any performance test listed earlier in this manual.

Calibration Adjustment Counter

The Tester contains a calibration adjustment counter. The counter is incremented each

time a calibration adjustment procedure is completed. The value in the counter can be

recorded and used to show that no adjustments have been made during a calibration

cycle.

Use the following steps to view the Tester's calibration counter.

1. While holding down L, turn the rotary function switch from OFF to V. The

Tester displays CAL.

2. Press the blue key A once to see the calibration counter. For example n003.

3. Turn the rotary function switch to OFF.

Calibration Adjustment Password

Enter the correct four-key password to start the calibration adjustment procedure. The

password can be changed or reset to the default as described in the following paragraphs.

The default password is 1234.

Changing the Password

Use the following steps to change the Tester's password:

1. While holding down L, turn the rotary function switch from OFF to V. The

Tester displays CAL.

2. Press the blue key once to see the calibration counter.

3. Press the blue key again to start the password entry. The Tester displays ----.

4. The Tester’s keys represent the digits indicated below when entering or changing

the password:

Blue Key = 1

L = 2 C = 3 T = 4

5. Press the four keys to enter the old password. If changing the password for the

first time, press the blue key (1), L (2), C (3), T (4).

6. Press C to change the password. The Tester displays ---- if the old password is

correct. If the password is not correct, the Tester emits a double beep, displays

---- and the four key password must be entered again. Repeat step 4.

7. Press the four keys of the new password.

8. Press the blue key to store the new password.