Model 177
Technical Manual
Section 2
Ludlum Measurements, Inc.
Page 2-1
October 2018
Getting Started
he Ludlum Model 177 Alarm Ratemeter is designed for use with
GM (Geiger Mueller) or scintillation detectors, which operate from
400 to 1500 V. Typical applications include contamination
monitoring, surveying, and area monitoring.
Unpacking and Repacking
Remove the calibration certificate and place it in a secure location. Remove
the instrument 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 between instruments and detectors (if applicable). The
Model 177 serial number is located on the back panel of the instrument.
To return an instrument for repair or calibration, provide sufficient packing
material to prevent damage during shipment.
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.
Preparing the Instrument for Use
Turn the power switch to the
ON
position. Depress the
BAT TEST
button.
Check that the meter reads above the
BAT TEST
indication. If the battery
does not check, the instrument will operate on 9 Vdc wall transformer only.
The battery may be trickle charged from 9 Vdc wall transformer.
Section
2
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