Model 78 and 78-1
Technical Manual
Section 2
Ludlum Measurements, Inc.
Page 2-1
March 2021
Getting Started
Unpacking and Repacking
Remove the calibration certificates and place them in a secure location. Remove the
instrument, detectors, and accessories (batteries, cable, etc.), and ensure that all of the items
listed on the packing list are in the carton. Check individual item serial numbers and ensure
calibration certificates match. The Model 78 serial number is located on the front panel
above the analog meter face. Most Ludlum Measurements, Inc. detectors have a label on the
base or body of the detector for model and serial number identification.
Important!
If multiple shipments are received, ensure that the detectors and instruments are
not interchanged. Each instrument is calibrated to a specific detector(s), and is
therefore not interchangeable.
To return an instrument for repair or calibration, provide sufficient packing material to
prevent damage during shipment. Also provide appropriate warning labels to ensure careful
handling. Include detector(s) and related cable(s) for calibration.
Every returned instrument must be accompanied by an
Instrument Return Form
, which
can be downloaded from the Ludlum website at
. Find the form by
clicking the “Support” tab and selecting “Repair and Calibration” from the drop-down
menu. Then choose the appropriate Repair and Calibration division where you will find a
link to the form.
Battery Installation
Ensure the Model 78
ON
/
OFF
switch is in the
OFF
position. Remove the handle by rotating
the handle counterclockwise. Install two "D" size batteries in the compartment with the
posts pointing toward the instrument. Re-install the handle, rotating clockwise.
Section
2
