Martel T150 User manual

Model T150
Hand-held
Frequency
Calibrator
OPERATING INSTRUCTIONS
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General Description
The T150 Frequency calibrator is designed to
be a high accuracy, simple to use frequency
standard for calibrating process control
instrumentation. The T150 can generate or read
frequencies ranging from 1 count per minute to
100 KHz allowing it to be used for a wide range
of flow measuring instrumentation.
When operated in the source mode, the user
can quickly step the output in 10% of range
increments or make smaller changes using the
scroll keys.
Installation
Unpacking
Remove the Packing List and verify that all
equipment has been received. If there are any
questions about the shipment, please call
When you receive the shipment, inspect the
container and equipment for any signs of
damage. Note any evidence of rough handling
in transit. Immediately report any damage to the
shipping agent.
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NOTE: The carrier will not honor any claims
unless all shipping material is saved for their
examination. After examining and removing
contents, save packing material and carton in
the event reshipment is necessary.
Set-up
Before beginning, become familiar with the
keypad layout and the configuration of the
input/output jacks. Remember, these jacks are
used in multiple configurations so pay careful
attention to the jack identification label on back
of unit and how the test leads are connected for
the specific application.
Operating Procedure
1. Turn on power and select the desired range
by depressing the range select key. Your
range choices are CPM, Hz, and KHz.
2. Make connections as required. Refer to the
operating mode section or the rear jack
identification label for connection information.
3. The step and scroll keys adjust the output
value up or down. Holding the scroll key
continuously for several seconds will
increase the scroll rate. The step 'key' allows
the user to make larger changes quickly and
is preset to step in 10% of range increments.
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Operating Modes
1. When operating in the output mode the T150
has the capability to drive loads up to 1
kOhm with TTL levels. The standard output
amplitude is a 5 volt ± 10% p-p square wave.
Figure 1
2. When operating in the read (input) mode the
T150 can monitor frequencies with
amplitudes ranging from 1 to 100 volts. The
waveform shape can be square, sine or
triangular.
Figure 2
Accuracy
The T150 is checked against an NIST Traceable
reference before shipment to verify that each
range falls within the 0.01% ±1count of full
scale. Since the accuracy of this particular
product is based on a very stable quartz
crystal, the T150 should stay well within its
operating specification without the need for
calibration for periods of 1 year or more.
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Specifications
Input/Output Ranges 0 to 1000 CPM
0 to 1000 Hz
0 to 100.0 kHz
Accuracy ±0.01% ± 1 count
Max Load Driving 5 mA (1 kOhm load min)
Input Signal Amplitude 1 to 100 Volts
Output Waveform 5 V ± 10%, Square Wave
Operating Temperature 0 to 50°C
Storage Temperature -20 to 60°C
Temperature Stability 0.005% of full scale/°C
Power19 V Alkaline Battery
Weight 12 oz. / 340 g
Notes: 1A low battery indication is given at 5.5
volts.
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Maintenance
Generally, with normal usage, the calibrator
should hold its rated specifications for at least
12 months. Beyond this, it should be returned
for re-calibration annually. If after the stated
warranty period, the device falls out of
calibration, or needs repair, it can be returned
to Martel Electronics for re-calibration. Please
Warranty
Martel Electronics Corporation warrants all
products against material defects and
workmanship for a period of twelve (12) months
after the date of shipment. Problems or defects
that arise from misuse or abuse of the
instrument are not covered. If any product is to
be returned, a “Return Material Authorization”
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