Specifications; Warranty; Ordering Information - Altek 942 Manual

Specifications

(Unless otherwise indicated, specifications are in ±% reading @ 23° C)
General
Frequency stability: <10 PPM/year drift
Temperature effect: ±0.001%/°C based on 23°C
Batteries: Six "AA" batteries (Alkaline supplied and recommended)
Battery life:
Read: >80 hours, nominal
Source: >50 hours, nominal at 250 KHz at 12V p-p
Low battery: "BAT" indication on the display at 6.5 V nominal,
approximate 10 hours left
Attenuator: Logarithmic for smooth input/output signal level control
Operating temperature range: -5 to +140°F (-20 to +60°C)
Storage temperature range: -13 to +149°F (-25 to +65°C)
Relative humidity: 10 to 90%, non-condensing, for 24 hours
Warmup time: 5 seconds to rated accuracy
Overall size: 73/16 x 4 x 27/16 inches (183 x 102 x 62 mm)
Weight: 1lb, 7oz (0.650 kg)
942-BNC: A male BNC is added to the top of the calibrator in
addition to the attached leads.
Ranges
Range
KHz
KHz
CPM
CPH
TOTAL

Warranty

Altek products are warranted to be free from defects
in material and workmanship (excluding fuses,
batteries and leads) for a period of three years from
the date of shipment. Warranty repairs can be
obtained by returning the equipment prepaid to our
factory. Products will be replaced, repaired, or
adjusted at our option. Altek gives no other
warranties, including any implied warranty of fitness
for a particular purpose. Also, Altek shall not be liable
for any special, indirect, incidental or consequential
damages or losses arising from the sale or use of its
products.
Source
0.01 to 250.00
0.001 to 99.999
Hz 0.1 to 9999.9
Hz 0.01 to 999.99
0.1 to 2000.0
1 to 20000
Up to 99999 counts
in 99 minutes
Read
Accuracy: ±(0.001% of reading + 1 LSD)
Sensitivity: Triggers on positive peaks down to 40 mV peak, DC
coupled
Maximum usable input voltage: 240 VAC
Mininum pulse width: 2 microseconds
Mininum time between pulses: 2 microseconds
Totalizer: Incremental counter to 99999 counts, timed operation
from1 to 99 minutes at a maximum rate of 1666.65 Hz
Input impedance: > 1 Meg Ohm + 60pF
Trigger level adjustment: x1 & x10 Attenuator plus logarithmic
control
NOTE: High signal noise and low slew rate (Volts-per-second) may
affect reading uncertainty (may not read sine waves below 10 Hz)
Source
Accuracy: ±0.001% of reading
Waveforms: Sine, zero based square & zero centered square waves
Totalizer output: from 1 to 99999 pulses for a period from 1 to 99
minutes up to a maximum rate of 1666.65 Hz
Output amplitude: 50 mV to 12 V p-p, 50% ±1% duty cycle
Risetime: <1microsecond @ 12V pak-to-peak
Output impedance: 600 Ohms
Source current: 8 mA maximum
Short circuit duration: Infinite
Voltage protection: Protected against misconnection to 240 Volts
peak AC/DC without fuses for 30 seconds
Read
0.01 to 250.00
0.001 to 99.999
0.1 to 9999.9
0.01 to 999.99
0.1 to 2000.0
10 to 20000
Up to 99999 counts

ORDERING INFORMATION

Description
Model 942 Frequency Calibrator
Model 942 Frequency Calibrator
with BNC connector
Carrying case: Included, zippered with belt loop and shoulder strap
PN 1887840 Rev A April 2002
©2002 Altek Industries, Inc. Specifications subject to change without notice.
All rights reserved. Printed in U.S.A.
Gate time
0.2 seconds
1 second
1 full cycle
1 full cycle
1 full cycle
1 full cycle
1 full cycle
Part No.
942
942-BNC